Spasojević, Milica

Link to this page

Authority KeyName Variants
orcid::0000-0001-9134-6637
  • Spasojević, Milica (23)
  • Spasojević, Milica (3)
Projects
Directed synthesis, structure and properties of multifunctional materials Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200288 (Innovation Center of the Faculty of Chemistry)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200053 (University of Belgrade, Institute for Multidisciplinary Research) Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200168 (University of Belgrade, Faculty of Chemistry)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200287 (Innovation Center of the Faculty of Technology and Metallurgy) Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200043 (Institute of Oncology and Radiology of Serbia, Belgrade) Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200146 (University of Belgrade, Faculty of Physical Chemistry)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200162 (University of Belgrade, Faculty of Physics) POLYGREEN - Towards a Green and Sustainable Polymer Industry: Fully Biobased Unsaturated Polyester Resins
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200132 (University of Kragujevac, Technical Faculty, Čačak) Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200135 (University of Belgrade, Faculty of Technology and Metallurgy)
Development of new bucket design for continuous excavators with the aime of modular cutting elements integration

Author's Bibliography

Horseradish peroxidase immobilization within micro-beads of oxidized tyramine-alginate for phenol removal from wastewater

Surudžić, Nevena; Spasojević, Dragica; Stanković, Mira; Spasojević, Milica; Elgahwash, Reyadh Gomah Amar; Prodanović, Radivoje; Prodanović, Olivera

(University of Belgrade, Technical Faculty in Bor, 2023)

TY  - CONF
AU  - Surudžić, Nevena
AU  - Spasojević, Dragica
AU  - Stanković, Mira
AU  - Spasojević, Milica
AU  - Elgahwash, Reyadh Gomah Amar
AU  - Prodanović, Radivoje
AU  - Prodanović, Olivera
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/6198
AB  - Natural polymers such as alginate, pectin, chitosan etc. were used as carriers for the immobilization of different types of enzymes. Among investigated enzymes, peroxidases hold a special place. Immobilized enzymes are frequently used in phenol removal reactions. In this research horseradish peroxidase was immobilized within alginate micro-beads. This natural polymer was previously oxidized with sodium periodate and modified with tyramine hydrochloride. Percent of oxidation was varied from 2.5 mol% to 10 mol%, and an increase in specific activity was noticed with increasing the oxidation percent. Immobilized peroxidases showed satisfactory stabilities after 10 days of storage. Phenol concentration in a batch reactor decreased during its oxidation with horseradish peroxidase immobilized on tyramine-alginate hydrogels.
PB  - University of Belgrade, Technical Faculty in Bor
C3  - 30th International Conference Ecological Truth and Environmental Research – EcoTER’23
T1  - Horseradish peroxidase immobilization within micro-beads of oxidized tyramine-alginate for phenol removal from wastewater
SP  - 267
EP  - 271
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2012
ER  - 
@conference{
author = "Surudžić, Nevena and Spasojević, Dragica and Stanković, Mira and Spasojević, Milica and Elgahwash, Reyadh Gomah Amar and Prodanović, Radivoje and Prodanović, Olivera",
year = "2023",
abstract = "Natural polymers such as alginate, pectin, chitosan etc. were used as carriers for the immobilization of different types of enzymes. Among investigated enzymes, peroxidases hold a special place. Immobilized enzymes are frequently used in phenol removal reactions. In this research horseradish peroxidase was immobilized within alginate micro-beads. This natural polymer was previously oxidized with sodium periodate and modified with tyramine hydrochloride. Percent of oxidation was varied from 2.5 mol% to 10 mol%, and an increase in specific activity was noticed with increasing the oxidation percent. Immobilized peroxidases showed satisfactory stabilities after 10 days of storage. Phenol concentration in a batch reactor decreased during its oxidation with horseradish peroxidase immobilized on tyramine-alginate hydrogels.",
publisher = "University of Belgrade, Technical Faculty in Bor",
journal = "30th International Conference Ecological Truth and Environmental Research – EcoTER’23",
title = "Horseradish peroxidase immobilization within micro-beads of oxidized tyramine-alginate for phenol removal from wastewater",
pages = "267-271",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2012"
}
Surudžić, N., Spasojević, D., Stanković, M., Spasojević, M., Elgahwash, R. G. A., Prodanović, R.,& Prodanović, O.. (2023). Horseradish peroxidase immobilization within micro-beads of oxidized tyramine-alginate for phenol removal from wastewater. in 30th International Conference Ecological Truth and Environmental Research – EcoTER’23
University of Belgrade, Technical Faculty in Bor., 267-271.
https://hdl.handle.net/21.15107/rcub_rimsi_2012
Surudžić N, Spasojević D, Stanković M, Spasojević M, Elgahwash RGA, Prodanović R, Prodanović O. Horseradish peroxidase immobilization within micro-beads of oxidized tyramine-alginate for phenol removal from wastewater. in 30th International Conference Ecological Truth and Environmental Research – EcoTER’23. 2023;:267-271.
https://hdl.handle.net/21.15107/rcub_rimsi_2012 .
Surudžić, Nevena, Spasojević, Dragica, Stanković, Mira, Spasojević, Milica, Elgahwash, Reyadh Gomah Amar, Prodanović, Radivoje, Prodanović, Olivera, "Horseradish peroxidase immobilization within micro-beads of oxidized tyramine-alginate for phenol removal from wastewater" in 30th International Conference Ecological Truth and Environmental Research – EcoTER’23 (2023):267-271,
https://hdl.handle.net/21.15107/rcub_rimsi_2012 .

Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH

Korać Jačić, Jelena; Bajuk-Bogdanović, Danica; Savić, Slađana D.; Božić Cvijan, Bojana; Spasojević, Milica; MIlenković, Milica R.

(Elsevier, 2023)

TY  - JOUR
AU  - Korać Jačić, Jelena
AU  - Bajuk-Bogdanović, Danica
AU  - Savić, Slađana D.
AU  - Božić Cvijan, Bojana
AU  - Spasojević, Milica
AU  - MIlenković, Milica R.
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5881
AB  - Hydralazine (HL), a frequently prescribed oral antihypertensive drug, shows redox interactions with transition metals such as copper that are not fully understood. Copper may be present at high concentrations in the digestive tract and can affect oral drugs. An important parameter for such interactions is pH, which changes from acidic in the gastric juice to neutral pH in intestines. In this study, we examined interactions of HL with Cu2+ ions in conditions that mimic pH shift in the digestive tract using UV–Vis, Raman and EPR spectroscopy, cyclic voltammetry and oximetry. In the acidic solution, Cu2+ formed a stable mononuclear complex with two bidentate coordinated HL molecules. On the other hand, at neutral pH, Cu2+ initiated oxidation and degradation of HL. The degradation was more rapid in the HL-Cu2+ system that was initially prepared at acidic pH and then shifted to neutral pH. The formation of the complex at acidic pH increases the availability of Cu2+ for redox reactions after the shift to neutral pH at which Cu2+ is poorly soluble. These results imply that the change of pH along the digestive tract may promote HL degradation by allowing the formation of the complex at gastric pH which makes Cu2+ available for subsequent oxidation of HL at neutral pH.
PB  - Elsevier
T2  - Journal of Inorganic Biochemistry
T1  - Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH
VL  - 243
SP  - 112181
DO  - 10.1016/j.jinorgbio.2023.112181
ER  - 
@article{
author = "Korać Jačić, Jelena and Bajuk-Bogdanović, Danica and Savić, Slađana D. and Božić Cvijan, Bojana and Spasojević, Milica and MIlenković, Milica R.",
year = "2023",
abstract = "Hydralazine (HL), a frequently prescribed oral antihypertensive drug, shows redox interactions with transition metals such as copper that are not fully understood. Copper may be present at high concentrations in the digestive tract and can affect oral drugs. An important parameter for such interactions is pH, which changes from acidic in the gastric juice to neutral pH in intestines. In this study, we examined interactions of HL with Cu2+ ions in conditions that mimic pH shift in the digestive tract using UV–Vis, Raman and EPR spectroscopy, cyclic voltammetry and oximetry. In the acidic solution, Cu2+ formed a stable mononuclear complex with two bidentate coordinated HL molecules. On the other hand, at neutral pH, Cu2+ initiated oxidation and degradation of HL. The degradation was more rapid in the HL-Cu2+ system that was initially prepared at acidic pH and then shifted to neutral pH. The formation of the complex at acidic pH increases the availability of Cu2+ for redox reactions after the shift to neutral pH at which Cu2+ is poorly soluble. These results imply that the change of pH along the digestive tract may promote HL degradation by allowing the formation of the complex at gastric pH which makes Cu2+ available for subsequent oxidation of HL at neutral pH.",
publisher = "Elsevier",
journal = "Journal of Inorganic Biochemistry",
title = "Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH",
volume = "243",
pages = "112181",
doi = "10.1016/j.jinorgbio.2023.112181"
}
Korać Jačić, J., Bajuk-Bogdanović, D., Savić, S. D., Božić Cvijan, B., Spasojević, M.,& MIlenković, M. R.. (2023). Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH. in Journal of Inorganic Biochemistry
Elsevier., 243, 112181.
https://doi.org/10.1016/j.jinorgbio.2023.112181
Korać Jačić J, Bajuk-Bogdanović D, Savić SD, Božić Cvijan B, Spasojević M, MIlenković MR. Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH. in Journal of Inorganic Biochemistry. 2023;243:112181.
doi:10.1016/j.jinorgbio.2023.112181 .
Korać Jačić, Jelena, Bajuk-Bogdanović, Danica, Savić, Slađana D., Božić Cvijan, Bojana, Spasojević, Milica, MIlenković, Milica R., "Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH" in Journal of Inorganic Biochemistry, 243 (2023):112181,
https://doi.org/10.1016/j.jinorgbio.2023.112181 . .

Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH

Korać Jačić, Jelena; Bajuk-Bogdanović, Danica; Savić, Slađana D.; Božić Cvijan, Bojana; Spasojević, Milica; MIlenković, Milica R.

(Elsevier, 2023)

TY  - JOUR
AU  - Korać Jačić, Jelena
AU  - Bajuk-Bogdanović, Danica
AU  - Savić, Slađana D.
AU  - Božić Cvijan, Bojana
AU  - Spasojević, Milica
AU  - MIlenković, Milica R.
PY  - 2023
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5882
AB  - Hydralazine (HL), a frequently prescribed oral antihypertensive drug, shows redox interactions with transition metals such as copper that are not fully understood. Copper may be present at high concentrations in the digestive tract and can affect oral drugs. An important parameter for such interactions is pH, which changes from acidic in the gastric juice to neutral pH in intestines. In this study, we examined interactions of HL with Cu2+ ions in conditions that mimic pH shift in the digestive tract using UV–Vis, Raman and EPR spectroscopy, cyclic voltammetry and oximetry. In the acidic solution, Cu2+ formed a stable mononuclear complex with two bidentate coordinated HL molecules. On the other hand, at neutral pH, Cu2+ initiated oxidation and degradation of HL. The degradation was more rapid in the HL-Cu2+ system that was initially prepared at acidic pH and then shifted to neutral pH. The formation of the complex at acidic pH increases the availability of Cu2+ for redox reactions after the shift to neutral pH at which Cu2+ is poorly soluble. These results imply that the change of pH along the digestive tract may promote HL degradation by allowing the formation of the complex at gastric pH which makes Cu2+ available for subsequent oxidation of HL at neutral pH.
PB  - Elsevier
T2  - Journal of Inorganic Biochemistry
T1  - Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH
VL  - 243
SP  - 112181
DO  - 10.1016/j.jinorgbio.2023.112181
ER  - 
@article{
author = "Korać Jačić, Jelena and Bajuk-Bogdanović, Danica and Savić, Slađana D. and Božić Cvijan, Bojana and Spasojević, Milica and MIlenković, Milica R.",
year = "2023",
abstract = "Hydralazine (HL), a frequently prescribed oral antihypertensive drug, shows redox interactions with transition metals such as copper that are not fully understood. Copper may be present at high concentrations in the digestive tract and can affect oral drugs. An important parameter for such interactions is pH, which changes from acidic in the gastric juice to neutral pH in intestines. In this study, we examined interactions of HL with Cu2+ ions in conditions that mimic pH shift in the digestive tract using UV–Vis, Raman and EPR spectroscopy, cyclic voltammetry and oximetry. In the acidic solution, Cu2+ formed a stable mononuclear complex with two bidentate coordinated HL molecules. On the other hand, at neutral pH, Cu2+ initiated oxidation and degradation of HL. The degradation was more rapid in the HL-Cu2+ system that was initially prepared at acidic pH and then shifted to neutral pH. The formation of the complex at acidic pH increases the availability of Cu2+ for redox reactions after the shift to neutral pH at which Cu2+ is poorly soluble. These results imply that the change of pH along the digestive tract may promote HL degradation by allowing the formation of the complex at gastric pH which makes Cu2+ available for subsequent oxidation of HL at neutral pH.",
publisher = "Elsevier",
journal = "Journal of Inorganic Biochemistry",
title = "Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH",
volume = "243",
pages = "112181",
doi = "10.1016/j.jinorgbio.2023.112181"
}
Korać Jačić, J., Bajuk-Bogdanović, D., Savić, S. D., Božić Cvijan, B., Spasojević, M.,& MIlenković, M. R.. (2023). Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH. in Journal of Inorganic Biochemistry
Elsevier., 243, 112181.
https://doi.org/10.1016/j.jinorgbio.2023.112181
Korać Jačić J, Bajuk-Bogdanović D, Savić SD, Božić Cvijan B, Spasojević M, MIlenković MR. Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH. in Journal of Inorganic Biochemistry. 2023;243:112181.
doi:10.1016/j.jinorgbio.2023.112181 .
Korać Jačić, Jelena, Bajuk-Bogdanović, Danica, Savić, Slađana D., Božić Cvijan, Bojana, Spasojević, Milica, MIlenković, Milica R., "Coordination of hydralazine with Cu2+ at acidic pH promotes its oxidative degradation at neutral pH" in Journal of Inorganic Biochemistry, 243 (2023):112181,
https://doi.org/10.1016/j.jinorgbio.2023.112181 . .

Affinity-based isolation of extracellular vesicles by means of single-domain antibodies bound to macroporous methacrylate-based copolymer

Filipović, Lidija; Spasojević, Milica; Prodanović, Radivoje; Korać, Aleksandra; Matijaševic, Suzana; Brajušković, Goran; de Marco, Ario; Popović, Milica M.

(Elsevier, 2022)

TY  - JOUR
AU  - Filipović, Lidija
AU  - Spasojević, Milica
AU  - Prodanović, Radivoje
AU  - Korać, Aleksandra
AU  - Matijaševic, Suzana
AU  - Brajušković, Goran
AU  - de Marco, Ario
AU  - Popović, Milica M.
PY  - 2022
UR  - https://pubmed.ncbi.nlm.nih.gov/35301156/
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5152
AB  - Correct elucidation of physiological and pathological processes mediated by extracellular vesicles (EV) is highly dependent on the reliability of the method used for their purification. Currently available chemical/physical protocols for sample fractionation are time-consuming, often scarcely reproducible and their yields are low. Immuno-capture based approaches could represent an effective purification alternative to obtain homogeneous EV samples. An easy-to-operate chromatography system was set-up for the purification of intact EVs based on a single domain (VHH) antibodies-copolymer matrix suitable for biological samples as different as conditioned cell culture medium and human plasma. Methacrylate-based copolymer is a porous solid support, the chemical versatility of which enables its efficient functionalization with VHHs. The combined analyses of morphological features and biomarker (CD9, CD63 and CD81) presence indicated that the recovered EVs were exosomes. The lipoprotein markers APO-A1 and APO-B were both negative in tested samples. This is the first report demonstrating the successful application of spherical porous methacrylate-based copolymer coupled with VHHs for the exosome isolation from biological fluids. This inexpensive immunoaffinity method has the potential to be applied for the isolation of EVs belonging to different morphological and physiological classes.
PB  - Elsevier
T2  - New Biotechnology
T1  - Affinity-based isolation of extracellular vesicles by means of single-domain antibodies bound to macroporous methacrylate-based copolymer
VL  - 69
SP  - 36
EP  - 48
DO  - 10.1016/j.nbt.2022.03.001
ER  - 
@article{
author = "Filipović, Lidija and Spasojević, Milica and Prodanović, Radivoje and Korać, Aleksandra and Matijaševic, Suzana and Brajušković, Goran and de Marco, Ario and Popović, Milica M.",
year = "2022",
abstract = "Correct elucidation of physiological and pathological processes mediated by extracellular vesicles (EV) is highly dependent on the reliability of the method used for their purification. Currently available chemical/physical protocols for sample fractionation are time-consuming, often scarcely reproducible and their yields are low. Immuno-capture based approaches could represent an effective purification alternative to obtain homogeneous EV samples. An easy-to-operate chromatography system was set-up for the purification of intact EVs based on a single domain (VHH) antibodies-copolymer matrix suitable for biological samples as different as conditioned cell culture medium and human plasma. Methacrylate-based copolymer is a porous solid support, the chemical versatility of which enables its efficient functionalization with VHHs. The combined analyses of morphological features and biomarker (CD9, CD63 and CD81) presence indicated that the recovered EVs were exosomes. The lipoprotein markers APO-A1 and APO-B were both negative in tested samples. This is the first report demonstrating the successful application of spherical porous methacrylate-based copolymer coupled with VHHs for the exosome isolation from biological fluids. This inexpensive immunoaffinity method has the potential to be applied for the isolation of EVs belonging to different morphological and physiological classes.",
publisher = "Elsevier",
journal = "New Biotechnology",
title = "Affinity-based isolation of extracellular vesicles by means of single-domain antibodies bound to macroporous methacrylate-based copolymer",
volume = "69",
pages = "36-48",
doi = "10.1016/j.nbt.2022.03.001"
}
Filipović, L., Spasojević, M., Prodanović, R., Korać, A., Matijaševic, S., Brajušković, G., de Marco, A.,& Popović, M. M.. (2022). Affinity-based isolation of extracellular vesicles by means of single-domain antibodies bound to macroporous methacrylate-based copolymer. in New Biotechnology
Elsevier., 69, 36-48.
https://doi.org/10.1016/j.nbt.2022.03.001
Filipović L, Spasojević M, Prodanović R, Korać A, Matijaševic S, Brajušković G, de Marco A, Popović MM. Affinity-based isolation of extracellular vesicles by means of single-domain antibodies bound to macroporous methacrylate-based copolymer. in New Biotechnology. 2022;69:36-48.
doi:10.1016/j.nbt.2022.03.001 .
Filipović, Lidija, Spasojević, Milica, Prodanović, Radivoje, Korać, Aleksandra, Matijaševic, Suzana, Brajušković, Goran, de Marco, Ario, Popović, Milica M., "Affinity-based isolation of extracellular vesicles by means of single-domain antibodies bound to macroporous methacrylate-based copolymer" in New Biotechnology, 69 (2022):36-48,
https://doi.org/10.1016/j.nbt.2022.03.001 . .
14
15

Supplementary information for the article: Filipović, L.; Spasojević, M.; Prodanović, R.; Korać, A.; Matijaševic, S.; Brajušković, G.; de Marco, A.; Popović, M. Affinity-Based Isolation of Extracellular Vesicles by Means of Single-Domain Antibodies Bound to Macroporous Methacrylate-Based Copolymer. New Biotechnology 2022, 69, 36–48. https://doi.org/10.1016/j.nbt.2022.03.001.

Filipović, Lidija; Spasojević, Milica; Prodanović, Radivoje; Korać, Aleksandra; Matijaševic, Suzana; Brajušković, Goran; de Marco, Ario; Popović, Milica M.

(Elsevier, 2022)

TY  - DATA
AU  - Filipović, Lidija
AU  - Spasojević, Milica
AU  - Prodanović, Radivoje
AU  - Korać, Aleksandra
AU  - Matijaševic, Suzana
AU  - Brajušković, Goran
AU  - de Marco, Ario
AU  - Popović, Milica M.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5152
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5153
AB  - Correct elucidation of physiological and pathological processes mediated by extracellular vesicles (EV) is highly dependent on the reliability of the method used for their purification. Currently available chemical/physical protocols for sample fractionation are time-consuming, often scarcely reproducible and their yields are low. Immuno-capture based approaches could represent an effective purification alternative to obtain homogeneous EV samples. An easy-to-operate chromatography system was set-up for the purification of intact EVs based on a single domain (VHH) antibodies-copolymer matrix suitable for biological samples as different as conditioned cell culture medium and human plasma. Methacrylate-based copolymer is a porous solid support, the chemical versatility of which enables its efficient functionalization with VHHs. The combined analyses of morphological features and biomarker (CD9, CD63 and CD81) presence indicated that the recovered EVs were exosomes. The lipoprotein markers APO-A1 and APO-B were both negative in tested samples. This is the first report demonstrating the successful application of spherical porous methacrylate-based copolymer coupled with VHHs for the exosome isolation from biological fluids. This inexpensive immunoaffinity method has the potential to be applied for the isolation of EVs belonging to different morphological and physiological classes.
PB  - Elsevier
T2  - New Biotechnology
T1  - Supplementary information for the article: Filipović, L.; Spasojević, M.; Prodanović, R.; Korać, A.; Matijaševic, S.; Brajušković, G.; de Marco, A.; Popović, M. Affinity-Based Isolation of Extracellular Vesicles by Means of Single-Domain Antibodies Bound to Macroporous Methacrylate-Based Copolymer. New Biotechnology 2022, 69, 36–48. https://doi.org/10.1016/j.nbt.2022.03.001.
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5153
ER  - 
@misc{
author = "Filipović, Lidija and Spasojević, Milica and Prodanović, Radivoje and Korać, Aleksandra and Matijaševic, Suzana and Brajušković, Goran and de Marco, Ario and Popović, Milica M.",
year = "2022",
abstract = "Correct elucidation of physiological and pathological processes mediated by extracellular vesicles (EV) is highly dependent on the reliability of the method used for their purification. Currently available chemical/physical protocols for sample fractionation are time-consuming, often scarcely reproducible and their yields are low. Immuno-capture based approaches could represent an effective purification alternative to obtain homogeneous EV samples. An easy-to-operate chromatography system was set-up for the purification of intact EVs based on a single domain (VHH) antibodies-copolymer matrix suitable for biological samples as different as conditioned cell culture medium and human plasma. Methacrylate-based copolymer is a porous solid support, the chemical versatility of which enables its efficient functionalization with VHHs. The combined analyses of morphological features and biomarker (CD9, CD63 and CD81) presence indicated that the recovered EVs were exosomes. The lipoprotein markers APO-A1 and APO-B were both negative in tested samples. This is the first report demonstrating the successful application of spherical porous methacrylate-based copolymer coupled with VHHs for the exosome isolation from biological fluids. This inexpensive immunoaffinity method has the potential to be applied for the isolation of EVs belonging to different morphological and physiological classes.",
publisher = "Elsevier",
journal = "New Biotechnology",
title = "Supplementary information for the article: Filipović, L.; Spasojević, M.; Prodanović, R.; Korać, A.; Matijaševic, S.; Brajušković, G.; de Marco, A.; Popović, M. Affinity-Based Isolation of Extracellular Vesicles by Means of Single-Domain Antibodies Bound to Macroporous Methacrylate-Based Copolymer. New Biotechnology 2022, 69, 36–48. https://doi.org/10.1016/j.nbt.2022.03.001.",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5153"
}
Filipović, L., Spasojević, M., Prodanović, R., Korać, A., Matijaševic, S., Brajušković, G., de Marco, A.,& Popović, M. M.. (2022). Supplementary information for the article: Filipović, L.; Spasojević, M.; Prodanović, R.; Korać, A.; Matijaševic, S.; Brajušković, G.; de Marco, A.; Popović, M. Affinity-Based Isolation of Extracellular Vesicles by Means of Single-Domain Antibodies Bound to Macroporous Methacrylate-Based Copolymer. New Biotechnology 2022, 69, 36–48. https://doi.org/10.1016/j.nbt.2022.03.001.. in New Biotechnology
Elsevier..
https://hdl.handle.net/21.15107/rcub_cherry_5153
Filipović L, Spasojević M, Prodanović R, Korać A, Matijaševic S, Brajušković G, de Marco A, Popović MM. Supplementary information for the article: Filipović, L.; Spasojević, M.; Prodanović, R.; Korać, A.; Matijaševic, S.; Brajušković, G.; de Marco, A.; Popović, M. Affinity-Based Isolation of Extracellular Vesicles by Means of Single-Domain Antibodies Bound to Macroporous Methacrylate-Based Copolymer. New Biotechnology 2022, 69, 36–48. https://doi.org/10.1016/j.nbt.2022.03.001.. in New Biotechnology. 2022;.
https://hdl.handle.net/21.15107/rcub_cherry_5153 .
Filipović, Lidija, Spasojević, Milica, Prodanović, Radivoje, Korać, Aleksandra, Matijaševic, Suzana, Brajušković, Goran, de Marco, Ario, Popović, Milica M., "Supplementary information for the article: Filipović, L.; Spasojević, M.; Prodanović, R.; Korać, A.; Matijaševic, S.; Brajušković, G.; de Marco, A.; Popović, M. Affinity-Based Isolation of Extracellular Vesicles by Means of Single-Domain Antibodies Bound to Macroporous Methacrylate-Based Copolymer. New Biotechnology 2022, 69, 36–48. https://doi.org/10.1016/j.nbt.2022.03.001." in New Biotechnology (2022),
https://hdl.handle.net/21.15107/rcub_cherry_5153 .

Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol

Pantić, Nevena; Spasojević, Milica; Stojanović, Željko; Veljović, Đorđe; Krstić, Jugoslav; Balaž, Ana Marija; Prodanović, Radivoje; Prodanović, Olivera

(Springer, 2022)

TY  - JOUR
AU  - Pantić, Nevena
AU  - Spasojević, Milica
AU  - Stojanović, Željko
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav
AU  - Balaž, Ana Marija
AU  - Prodanović, Radivoje
AU  - Prodanović, Olivera
PY  - 2022
UR  - https://link.springer.com/article/10.1007/s10924-021-02364-3
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5205
AB  - Novel macroporous copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate with mean pore size diameters ranging from 150 to 310 nm were synthesized by dispersion polymerization and modified with ethylenediamine. The glutaraldehyde and periodate method were employed to immobilize horseradish peroxidase (HRP) onto these carriers. The activity of the immobilized enzyme was greatly affected by the pore size of the carrier. The highest specific activities of 9.65 and 8.94 U/g of dry weight were obtained for HRP immobilized by the periodate-route onto poly(GMA‐co‐EGDMA) carriers with pore size diameters of 234 and 297 nm, respectively. Stability studies showed an improved operational stability of immobilized peroxidase at 65 °C and in an organic solvent. HRP immobilized on a copolymer with a pore size of 234 nm, showing the highest specific activity and good stability, had higher activities at almost all pH values than the native enzyme and the increased Km value for pyrogallol oxidation. Immobilized HRP retained 80% of its original activity after five consecutive cycles of the pyrogallol oxidation and 98% of its initial activity in a storage stability study. Enzyme immobilized onto the macroporous copolymer with the pore size diameter of 234 nm showed a substantial degree of phenol removal achieved by immobilized peroxidase.
PB  - Springer
T2  - Journal of Polymers and the Environment
T1  - Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol
VL  - 30
SP  - 3005
EP  - 3020
DO  - 10.1007/s10924-021-02364-3
ER  - 
@article{
author = "Pantić, Nevena and Spasojević, Milica and Stojanović, Željko and Veljović, Đorđe and Krstić, Jugoslav and Balaž, Ana Marija and Prodanović, Radivoje and Prodanović, Olivera",
year = "2022",
abstract = "Novel macroporous copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate with mean pore size diameters ranging from 150 to 310 nm were synthesized by dispersion polymerization and modified with ethylenediamine. The glutaraldehyde and periodate method were employed to immobilize horseradish peroxidase (HRP) onto these carriers. The activity of the immobilized enzyme was greatly affected by the pore size of the carrier. The highest specific activities of 9.65 and 8.94 U/g of dry weight were obtained for HRP immobilized by the periodate-route onto poly(GMA‐co‐EGDMA) carriers with pore size diameters of 234 and 297 nm, respectively. Stability studies showed an improved operational stability of immobilized peroxidase at 65 °C and in an organic solvent. HRP immobilized on a copolymer with a pore size of 234 nm, showing the highest specific activity and good stability, had higher activities at almost all pH values than the native enzyme and the increased Km value for pyrogallol oxidation. Immobilized HRP retained 80% of its original activity after five consecutive cycles of the pyrogallol oxidation and 98% of its initial activity in a storage stability study. Enzyme immobilized onto the macroporous copolymer with the pore size diameter of 234 nm showed a substantial degree of phenol removal achieved by immobilized peroxidase.",
publisher = "Springer",
journal = "Journal of Polymers and the Environment",
title = "Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol",
volume = "30",
pages = "3005-3020",
doi = "10.1007/s10924-021-02364-3"
}
Pantić, N., Spasojević, M., Stojanović, Ž., Veljović, Đ., Krstić, J., Balaž, A. M., Prodanović, R.,& Prodanović, O.. (2022). Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol. in Journal of Polymers and the Environment
Springer., 30, 3005-3020.
https://doi.org/10.1007/s10924-021-02364-3
Pantić N, Spasojević M, Stojanović Ž, Veljović Đ, Krstić J, Balaž AM, Prodanović R, Prodanović O. Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol. in Journal of Polymers and the Environment. 2022;30:3005-3020.
doi:10.1007/s10924-021-02364-3 .
Pantić, Nevena, Spasojević, Milica, Stojanović, Željko, Veljović, Đorđe, Krstić, Jugoslav, Balaž, Ana Marija, Prodanović, Radivoje, Prodanović, Olivera, "Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol" in Journal of Polymers and the Environment, 30 (2022):3005-3020,
https://doi.org/10.1007/s10924-021-02364-3 . .
5
4

Mathematical model of electrocatalysis of methanol oxidation at the mixture of nanocrystals of platinum and ruthenium dioxide

Spasojević, Milica; Marković, Dušan; Spasojević, Miroslav

(2022)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Marković, Dušan
AU  - Spasojević, Miroslav
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5898
AB  - Mathematical model representing a catalytic effect
of a nanocrystal mixture of metallic platinum and
ruthenium dioxide for electrooxidation of methanol
is established. Dependance of a current density of
the methanol electrooxidation on the chemical
composition and size of nanocrystals is determined
in the model. A good agreement between theoretical
values and experimental results corroborates that
electrooxidation of methanol is guided by a
bifunctional mechanism. The model is based on the fact that the catalytic effect is proportional to the length of the contact border
between nanocrystals of metallic platinum and nanocrystals of ruthenium dioxide. Ru-OH particles are formed on the Ru atoms at the
border of crystal grains, at potentials more negative than on platinum. These species oxidize firmly bound intermediates COad located
on the adjacent Pt atoms and thus release the Pt atoms for adsorption and dehydrogenation of subsequent molecules of methanol.
T2  - Revue Roumaine de Chimie
T1  - Mathematical model of electrocatalysis of methanol oxidation at the mixture of nanocrystals of platinum and ruthenium dioxide
IS  - 67
SP  - 473
SP  - 482
DO  - 10.33224/rrch.2022.67.8-9.06
ER  - 
@article{
author = "Spasojević, Milica and Marković, Dušan and Spasojević, Miroslav",
year = "2022",
abstract = "Mathematical model representing a catalytic effect
of a nanocrystal mixture of metallic platinum and
ruthenium dioxide for electrooxidation of methanol
is established. Dependance of a current density of
the methanol electrooxidation on the chemical
composition and size of nanocrystals is determined
in the model. A good agreement between theoretical
values and experimental results corroborates that
electrooxidation of methanol is guided by a
bifunctional mechanism. The model is based on the fact that the catalytic effect is proportional to the length of the contact border
between nanocrystals of metallic platinum and nanocrystals of ruthenium dioxide. Ru-OH particles are formed on the Ru atoms at the
border of crystal grains, at potentials more negative than on platinum. These species oxidize firmly bound intermediates COad located
on the adjacent Pt atoms and thus release the Pt atoms for adsorption and dehydrogenation of subsequent molecules of methanol.",
journal = "Revue Roumaine de Chimie",
title = "Mathematical model of electrocatalysis of methanol oxidation at the mixture of nanocrystals of platinum and ruthenium dioxide",
number = "67",
pages = "473-482",
doi = "10.33224/rrch.2022.67.8-9.06"
}
Spasojević, M., Marković, D.,& Spasojević, M.. (2022). Mathematical model of electrocatalysis of methanol oxidation at the mixture of nanocrystals of platinum and ruthenium dioxide. in Revue Roumaine de Chimie(67), 473.
https://doi.org/10.33224/rrch.2022.67.8-9.06
Spasojević M, Marković D, Spasojević M. Mathematical model of electrocatalysis of methanol oxidation at the mixture of nanocrystals of platinum and ruthenium dioxide. in Revue Roumaine de Chimie. 2022;(67):473.
doi:10.33224/rrch.2022.67.8-9.06 .
Spasojević, Milica, Marković, Dušan, Spasojević, Miroslav, "Mathematical model of electrocatalysis of methanol oxidation at the mixture of nanocrystals of platinum and ruthenium dioxide" in Revue Roumaine de Chimie, no. 67 (2022):473,
https://doi.org/10.33224/rrch.2022.67.8-9.06 . .

The properties of mechanically activated powders consisting of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3

Spasojević, Milica; Luković, Milentije; Arnaut, Suzana; Maričić, Ema; Spasojević, Miroslav

(Elsevier, 2022)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Luković, Milentije
AU  - Arnaut, Suzana
AU  - Maričić, Ema
AU  - Spasojević, Miroslav
PY  - 2022
UR  - https://www.sciencedirect.com/science/article/pii/S0254058422002930?via%3Dihub
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5140
AB  - A novel multiferroic composite material, composed of a mixture of nanocrystals of BaT1-xMexO3 and MeFe12O19 (Me = Zn and Mn) and an amorphous phases of BaTi1-xMexO3, MeFe12O19 and MeFe2O4, is synthetized. The composite material consisting of the mixture of nanocrystals of Fe2O3, ZnO and BaTiO3 embedded into the amorphous phase of MnCO3 is obtained by grinding the powder mixture of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3 for 20 min. The powders as-ground for 80 min and more are composed of the mixture of nanocrystals of Fe2O3 and BaTiO3 embedded in the amorphous phase of Fe2O3, ZnO, BaTiO3 and MnCO3. With increasing grinding time, formation of the composite with finer particles, a lower mean size of nanocrystals, higher content of the amorphous phase and higher magnetization is observed. The magnetization of the pressed samples increases with increasing grinding time. Grinding declines the amount of large weakly-ferromagnetic crystals of hematite, however it increases the quantity of paramagnetic small nanocrystals and the amorphous phase. The powder is thermostable up to 280 °C. Annealing above 280 °C results in the decrease in the magnetization of the cooled sample as a consequence of crystallization of the amorphous phase and enlargement of the size of nanocrystals. When sintering for 2 h at 1200 °C, the mixture of nanocrystals of BaTi1-xMexО3 and MeFe12O19 embedded into the amorphous matrix composed of BaTi1-xMexO3, MeFe12O19 and MeFe2О4 is formed. The sintered samples ground for longer periods of time are mainly composed of the amorphous phase and fine nanocrystals. Grinding of powders for less than 100 min results in the sintered samples with a granular structure, whereas the samples obtained from powders ground for more than 160 min are relatively compact. The magnetization of the sintered samples declines with increasing grinding time to 180 min due to transformation of nanocrystals into the amorphous phase. Further increase in grinding time from 180 to 240 min causes the increase in the magnetization, resulting from the effect of sintering. The magnetization of the sintered samples ground for more than 240 min declines with increasing grinding time, since the amount of the amorphous phase rapidly increases when grinding above 240 min. The samples sintered from the powders ground for 240 min show the compact structure and maximum magnetization.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - The properties of mechanically activated powders consisting of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3
VL  - 283
DO  - 10.1016/j.matchemphys.2022.125987
ER  - 
@article{
author = "Spasojević, Milica and Luković, Milentije and Arnaut, Suzana and Maričić, Ema and Spasojević, Miroslav",
year = "2022",
abstract = "A novel multiferroic composite material, composed of a mixture of nanocrystals of BaT1-xMexO3 and MeFe12O19 (Me = Zn and Mn) and an amorphous phases of BaTi1-xMexO3, MeFe12O19 and MeFe2O4, is synthetized. The composite material consisting of the mixture of nanocrystals of Fe2O3, ZnO and BaTiO3 embedded into the amorphous phase of MnCO3 is obtained by grinding the powder mixture of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3 for 20 min. The powders as-ground for 80 min and more are composed of the mixture of nanocrystals of Fe2O3 and BaTiO3 embedded in the amorphous phase of Fe2O3, ZnO, BaTiO3 and MnCO3. With increasing grinding time, formation of the composite with finer particles, a lower mean size of nanocrystals, higher content of the amorphous phase and higher magnetization is observed. The magnetization of the pressed samples increases with increasing grinding time. Grinding declines the amount of large weakly-ferromagnetic crystals of hematite, however it increases the quantity of paramagnetic small nanocrystals and the amorphous phase. The powder is thermostable up to 280 °C. Annealing above 280 °C results in the decrease in the magnetization of the cooled sample as a consequence of crystallization of the amorphous phase and enlargement of the size of nanocrystals. When sintering for 2 h at 1200 °C, the mixture of nanocrystals of BaTi1-xMexО3 and MeFe12O19 embedded into the amorphous matrix composed of BaTi1-xMexO3, MeFe12O19 and MeFe2О4 is formed. The sintered samples ground for longer periods of time are mainly composed of the amorphous phase and fine nanocrystals. Grinding of powders for less than 100 min results in the sintered samples with a granular structure, whereas the samples obtained from powders ground for more than 160 min are relatively compact. The magnetization of the sintered samples declines with increasing grinding time to 180 min due to transformation of nanocrystals into the amorphous phase. Further increase in grinding time from 180 to 240 min causes the increase in the magnetization, resulting from the effect of sintering. The magnetization of the sintered samples ground for more than 240 min declines with increasing grinding time, since the amount of the amorphous phase rapidly increases when grinding above 240 min. The samples sintered from the powders ground for 240 min show the compact structure and maximum magnetization.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "The properties of mechanically activated powders consisting of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3",
volume = "283",
doi = "10.1016/j.matchemphys.2022.125987"
}
Spasojević, M., Luković, M., Arnaut, S., Maričić, E.,& Spasojević, M.. (2022). The properties of mechanically activated powders consisting of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3. in Materials Chemistry and Physics
Elsevier., 283.
https://doi.org/10.1016/j.matchemphys.2022.125987
Spasojević M, Luković M, Arnaut S, Maričić E, Spasojević M. The properties of mechanically activated powders consisting of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3. in Materials Chemistry and Physics. 2022;283.
doi:10.1016/j.matchemphys.2022.125987 .
Spasojević, Milica, Luković, Milentije, Arnaut, Suzana, Maričić, Ema, Spasojević, Miroslav, "The properties of mechanically activated powders consisting of 17.0 wt% Fe2O3, 4.4 wt% MnCO3, 3.6 wt% ZnO and 75.0 wt% BaTiO3" in Materials Chemistry and Physics, 283 (2022),
https://doi.org/10.1016/j.matchemphys.2022.125987 . .

Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery

Marković, Maja D.; Panić, Vesna V.; Savić, Sanja I.; Ugrinović, Vukašin Đ.; Pjanović, Rada V.; Spasojević, Milica ; Spasojevic, Pavle M.

(Elsevier, 2022)

TY  - JOUR
AU  - Marković, Maja D.
AU  - Panić, Vesna V.
AU  - Savić, Sanja I.
AU  - Ugrinović, Vukašin Đ.
AU  - Pjanović, Rada V.
AU  - Spasojević, Milica 
AU  - Spasojevic, Pavle M.
PY  - 2022
UR  - https://www.sciencedirect.com/science/article/pii/S1387181122001366?pes=vor
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5148
AB  - Materials sensitive to external stimuli are recognized as safe and effective tool able to respond to specific demands in the therapy of various diseases. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) are widely investigated for targeted drug delivery. Still, the abundance of the stimuli in the human body often requires more than one responsive group able to act simultaneously to achieve optimal therapeutic effects. Due to its pH sensitivity and bio-based production, crotonic acid (CA) was a monomer of choice for preparation of eco-friendly copolymer hydrogels based on NIPAAM and CA (P(NIPAAMcoCA)), which turned to be thermo and pH sensitive at the same time. The potential of the P(NIPAAMcoCA) system for encapsulation and controlled release of drugs with different solubility was investigated engaging water-soluble lidocaine hydrochloride and poorly water-soluble ibuprofen as model drugs. The hydrogels were characterized by various technics: FTIR, DSC, SEM and single compressive tests, while swelling behavior and controlled release of the drugs were analyzed with respect to the CA amount in two environments with different pH values at 25 °C and 37 °C. It was demonstrated that due to their dual responsiveness the P(NIPAAMcoCA) hydrogels have potential for controlled release of drugs with different solubility.
PB  - Elsevier
T2  - Microporous and Mesoporous Materials
T1  - Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery
VL  - 335
SP  - 111817
DO  - 10.1016/j.micromeso.2022.111817
ER  - 
@article{
author = "Marković, Maja D. and Panić, Vesna V. and Savić, Sanja I. and Ugrinović, Vukašin Đ. and Pjanović, Rada V. and Spasojević, Milica  and Spasojevic, Pavle M.",
year = "2022",
abstract = "Materials sensitive to external stimuli are recognized as safe and effective tool able to respond to specific demands in the therapy of various diseases. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) are widely investigated for targeted drug delivery. Still, the abundance of the stimuli in the human body often requires more than one responsive group able to act simultaneously to achieve optimal therapeutic effects. Due to its pH sensitivity and bio-based production, crotonic acid (CA) was a monomer of choice for preparation of eco-friendly copolymer hydrogels based on NIPAAM and CA (P(NIPAAMcoCA)), which turned to be thermo and pH sensitive at the same time. The potential of the P(NIPAAMcoCA) system for encapsulation and controlled release of drugs with different solubility was investigated engaging water-soluble lidocaine hydrochloride and poorly water-soluble ibuprofen as model drugs. The hydrogels were characterized by various technics: FTIR, DSC, SEM and single compressive tests, while swelling behavior and controlled release of the drugs were analyzed with respect to the CA amount in two environments with different pH values at 25 °C and 37 °C. It was demonstrated that due to their dual responsiveness the P(NIPAAMcoCA) hydrogels have potential for controlled release of drugs with different solubility.",
publisher = "Elsevier",
journal = "Microporous and Mesoporous Materials",
title = "Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery",
volume = "335",
pages = "111817",
doi = "10.1016/j.micromeso.2022.111817"
}
Marković, M. D., Panić, V. V., Savić, S. I., Ugrinović, V. Đ., Pjanović, R. V., Spasojević, M.,& Spasojevic, P. M.. (2022). Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery. in Microporous and Mesoporous Materials
Elsevier., 335, 111817.
https://doi.org/10.1016/j.micromeso.2022.111817
Marković MD, Panić VV, Savić SI, Ugrinović VĐ, Pjanović RV, Spasojević M, Spasojevic PM. Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery. in Microporous and Mesoporous Materials. 2022;335:111817.
doi:10.1016/j.micromeso.2022.111817 .
Marković, Maja D., Panić, Vesna V., Savić, Sanja I., Ugrinović, Vukašin Đ., Pjanović, Rada V., Spasojević, Milica , Spasojevic, Pavle M., "Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery" in Microporous and Mesoporous Materials, 335 (2022):111817,
https://doi.org/10.1016/j.micromeso.2022.111817 . .
10
1
9

Supplementary information for the article: Marković, M. D.; Panić, V. V.; Savić, S. I.; Ugrinović, V. Đ.; Pjanović, R. V.; Spasojević, M. M.; Spasojevic, P. M. Biobased Thermo/PH Sensitive Poly(N-Isopropylacrylamide-Co-Crotonic Acid) Hydrogels for Targeted Drug Delivery. Microporous and Mesoporous Materials 2022, 335. https://doi.org/10.1016.

Marković, Maja D.; Panić, Vesna V.; Savić, Sanja I.; Ugrinović, Vukašin Đ.; Pjanović, Rada V.; Spasojević, Milica ; Spasojevic, Pavle M.

(Elsevier, 2022)

TY  - DATA
AU  - Marković, Maja D.
AU  - Panić, Vesna V.
AU  - Savić, Sanja I.
AU  - Ugrinović, Vukašin Đ.
AU  - Pjanović, Rada V.
AU  - Spasojević, Milica 
AU  - Spasojevic, Pavle M.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5148
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5150
AB  - Materials sensitive to external stimuli are recognized as safe and effective tool able to respond to specific demands in the therapy of various diseases. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) are widely investigated for targeted drug delivery. Still, the abundance of the stimuli in the human body often requires more than one responsive group able to act simultaneously to achieve optimal therapeutic effects. Due to its pH sensitivity and bio-based production, crotonic acid (CA) was a monomer of choice for preparation of eco-friendly copolymer hydrogels based on NIPAAM and CA (P(NIPAAMcoCA)), which turned to be thermo and pH sensitive at the same time. The potential of the P(NIPAAMcoCA) system for encapsulation and controlled release of drugs with different solubility was investigated engaging water-soluble lidocaine hydrochloride and poorly water-soluble ibuprofen as model drugs. The hydrogels were characterized by various technics: FTIR, DSC, SEM and single compressive tests, while swelling behavior and controlled release of the drugs were analyzed with respect to the CA amount in two environments with different pH values at 25 °C and 37 °C. It was demonstrated that due to their dual responsiveness the P(NIPAAMcoCA) hydrogels have potential for controlled release of drugs with different solubility.
PB  - Elsevier
T2  - Microporous and Mesoporous Materials
T1  - Supplementary information for the article: Marković, M. D.; Panić, V. V.; Savić, S. I.; Ugrinović, V. Đ.; Pjanović, R. V.; Spasojević, M. M.; Spasojevic, P. M. Biobased Thermo/PH Sensitive Poly(N-Isopropylacrylamide-Co-Crotonic Acid) Hydrogels for Targeted Drug Delivery. Microporous and Mesoporous Materials 2022, 335. https://doi.org/10.1016.
VL  - 335
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5150
ER  - 
@misc{
author = "Marković, Maja D. and Panić, Vesna V. and Savić, Sanja I. and Ugrinović, Vukašin Đ. and Pjanović, Rada V. and Spasojević, Milica  and Spasojevic, Pavle M.",
year = "2022",
abstract = "Materials sensitive to external stimuli are recognized as safe and effective tool able to respond to specific demands in the therapy of various diseases. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) are widely investigated for targeted drug delivery. Still, the abundance of the stimuli in the human body often requires more than one responsive group able to act simultaneously to achieve optimal therapeutic effects. Due to its pH sensitivity and bio-based production, crotonic acid (CA) was a monomer of choice for preparation of eco-friendly copolymer hydrogels based on NIPAAM and CA (P(NIPAAMcoCA)), which turned to be thermo and pH sensitive at the same time. The potential of the P(NIPAAMcoCA) system for encapsulation and controlled release of drugs with different solubility was investigated engaging water-soluble lidocaine hydrochloride and poorly water-soluble ibuprofen as model drugs. The hydrogels were characterized by various technics: FTIR, DSC, SEM and single compressive tests, while swelling behavior and controlled release of the drugs were analyzed with respect to the CA amount in two environments with different pH values at 25 °C and 37 °C. It was demonstrated that due to their dual responsiveness the P(NIPAAMcoCA) hydrogels have potential for controlled release of drugs with different solubility.",
publisher = "Elsevier",
journal = "Microporous and Mesoporous Materials",
title = "Supplementary information for the article: Marković, M. D.; Panić, V. V.; Savić, S. I.; Ugrinović, V. Đ.; Pjanović, R. V.; Spasojević, M. M.; Spasojevic, P. M. Biobased Thermo/PH Sensitive Poly(N-Isopropylacrylamide-Co-Crotonic Acid) Hydrogels for Targeted Drug Delivery. Microporous and Mesoporous Materials 2022, 335. https://doi.org/10.1016.",
volume = "335",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5150"
}
Marković, M. D., Panić, V. V., Savić, S. I., Ugrinović, V. Đ., Pjanović, R. V., Spasojević, M.,& Spasojevic, P. M.. (2022). Supplementary information for the article: Marković, M. D.; Panić, V. V.; Savić, S. I.; Ugrinović, V. Đ.; Pjanović, R. V.; Spasojević, M. M.; Spasojevic, P. M. Biobased Thermo/PH Sensitive Poly(N-Isopropylacrylamide-Co-Crotonic Acid) Hydrogels for Targeted Drug Delivery. Microporous and Mesoporous Materials 2022, 335. https://doi.org/10.1016.. in Microporous and Mesoporous Materials
Elsevier., 335.
https://hdl.handle.net/21.15107/rcub_cherry_5150
Marković MD, Panić VV, Savić SI, Ugrinović VĐ, Pjanović RV, Spasojević M, Spasojevic PM. Supplementary information for the article: Marković, M. D.; Panić, V. V.; Savić, S. I.; Ugrinović, V. Đ.; Pjanović, R. V.; Spasojević, M. M.; Spasojevic, P. M. Biobased Thermo/PH Sensitive Poly(N-Isopropylacrylamide-Co-Crotonic Acid) Hydrogels for Targeted Drug Delivery. Microporous and Mesoporous Materials 2022, 335. https://doi.org/10.1016.. in Microporous and Mesoporous Materials. 2022;335.
https://hdl.handle.net/21.15107/rcub_cherry_5150 .
Marković, Maja D., Panić, Vesna V., Savić, Sanja I., Ugrinović, Vukašin Đ., Pjanović, Rada V., Spasojević, Milica , Spasojevic, Pavle M., "Supplementary information for the article: Marković, M. D.; Panić, V. V.; Savić, S. I.; Ugrinović, V. Đ.; Pjanović, R. V.; Spasojević, M. M.; Spasojevic, P. M. Biobased Thermo/PH Sensitive Poly(N-Isopropylacrylamide-Co-Crotonic Acid) Hydrogels for Targeted Drug Delivery. Microporous and Mesoporous Materials 2022, 335. https://doi.org/10.1016." in Microporous and Mesoporous Materials, 335 (2022),
https://hdl.handle.net/21.15107/rcub_cherry_5150 .

The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters

Pantić, Olga; Spasojević, Milica; Džunuzović, Enis; Nikolić, Marija S.; Savić, Sanja; Marković, Maja; Spasojević, Pavle M.

(MDPI, 2022)

TY  - JOUR
AU  - Pantić, Olga
AU  - Spasojević, Milica
AU  - Džunuzović, Enis
AU  - Nikolić, Marija S.
AU  - Savić, Sanja
AU  - Marković, Maja
AU  - Spasojević, Pavle M.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5605
AB  - The scope of the present study was to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to the commercial formulations. The focus was set on the determination of the optimal prepolymer formulation using the same set of diacids (itaconic and succinic acid) and different diols (propylene glycol, isosorbide and neopentyl glycol) or its equimolar mixtures, keeping the fixed molar ratio of 1:1:2.1 in all feed compositions. Instead of commonly used styrene, bio-based dimethyl itaconate was used as a reactive diluent (RD). The rheology of the obtained resins was studied in detail. The effect of the used diol on structural (FTIR), thermal (DSC), thermomechanical (DMA), and mechanical (tensile) properties was explained. The properties of UPRs were found to be highly dependent on the diol used in the prepolymer formulation. The UPR with an equimolar ratio of propylene glycol and neopentyl glycol was shown to be the most promising candidate to compete with the commercial petroleum-based resins.
PB  - MDPI
T2  - Polymers
T1  - The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters
VL  - 14
IS  - 15
SP  - 2970
DO  - 10.3390/polym14152970
ER  - 
@article{
author = "Pantić, Olga and Spasojević, Milica and Džunuzović, Enis and Nikolić, Marija S. and Savić, Sanja and Marković, Maja and Spasojević, Pavle M.",
year = "2022",
abstract = "The scope of the present study was to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to the commercial formulations. The focus was set on the determination of the optimal prepolymer formulation using the same set of diacids (itaconic and succinic acid) and different diols (propylene glycol, isosorbide and neopentyl glycol) or its equimolar mixtures, keeping the fixed molar ratio of 1:1:2.1 in all feed compositions. Instead of commonly used styrene, bio-based dimethyl itaconate was used as a reactive diluent (RD). The rheology of the obtained resins was studied in detail. The effect of the used diol on structural (FTIR), thermal (DSC), thermomechanical (DMA), and mechanical (tensile) properties was explained. The properties of UPRs were found to be highly dependent on the diol used in the prepolymer formulation. The UPR with an equimolar ratio of propylene glycol and neopentyl glycol was shown to be the most promising candidate to compete with the commercial petroleum-based resins.",
publisher = "MDPI",
journal = "Polymers",
title = "The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters",
volume = "14",
number = "15",
pages = "2970",
doi = "10.3390/polym14152970"
}
Pantić, O., Spasojević, M., Džunuzović, E., Nikolić, M. S., Savić, S., Marković, M.,& Spasojević, P. M.. (2022). The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters. in Polymers
MDPI., 14(15), 2970.
https://doi.org/10.3390/polym14152970
Pantić O, Spasojević M, Džunuzović E, Nikolić MS, Savić S, Marković M, Spasojević PM. The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters. in Polymers. 2022;14(15):2970.
doi:10.3390/polym14152970 .
Pantić, Olga, Spasojević, Milica, Džunuzović, Enis, Nikolić, Marija S., Savić, Sanja, Marković, Maja, Spasojević, Pavle M., "The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters" in Polymers, 14, no. 15 (2022):2970,
https://doi.org/10.3390/polym14152970 . .
2
2

Hydrogen Adsorption Process In Nanocrystalline Nuclear Graphite

Lukić, Vladimir D.; Spasojević, Milica ; Luković, Milentije; Spasojević, Miroslav; Maričić, Aleksa

(Belgrade : Vinča Institute of Nuclear Sciences, 2022)

TY  - JOUR
AU  - Lukić, Vladimir D.
AU  - Spasojević, Milica 
AU  - Luković, Milentije
AU  - Spasojević, Miroslav
AU  - Maričić, Aleksa
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5621
AB  - Kinetics and mechanism of hydrogen adsorption in as-obtained and ground nuclear graphite
Wendelstein 7-X are examined. In the first time interval the adsorption process is determined
by dissociation of the hydrogen molecule, occurring at the outer surface and in open
micropores of nuclear graphite particles. However, in the second time interval, the slowest
step in the hydrogen adsorption is inter-granular and inter-crystallite diffusion in nanopores
of graphite. The X-ray analysis shows, that grinding of as-obtained nuclear graphite results in
finer particles with finer nanocrystals and larger density of opened pores and carbon reactive
sites. The capacity and rate of adsorption increase with comminution of nuclear graphite particles and adsorbed hydrogen does not sub stantially alter the microstructure of nuclear
graphite.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
T2  - Nuclear Technology and Radiation Protection
T1  - Hydrogen Adsorption Process In Nanocrystalline Nuclear Graphite
VL  - 37
IS  - 1
SP  - 11
EP  - 17
DO  - 10.2298/NTRP2201011L
ER  - 
@article{
author = "Lukić, Vladimir D. and Spasojević, Milica  and Luković, Milentije and Spasojević, Miroslav and Maričić, Aleksa",
year = "2022",
abstract = "Kinetics and mechanism of hydrogen adsorption in as-obtained and ground nuclear graphite
Wendelstein 7-X are examined. In the first time interval the adsorption process is determined
by dissociation of the hydrogen molecule, occurring at the outer surface and in open
micropores of nuclear graphite particles. However, in the second time interval, the slowest
step in the hydrogen adsorption is inter-granular and inter-crystallite diffusion in nanopores
of graphite. The X-ray analysis shows, that grinding of as-obtained nuclear graphite results in
finer particles with finer nanocrystals and larger density of opened pores and carbon reactive
sites. The capacity and rate of adsorption increase with comminution of nuclear graphite particles and adsorbed hydrogen does not sub stantially alter the microstructure of nuclear
graphite.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "Nuclear Technology and Radiation Protection",
title = "Hydrogen Adsorption Process In Nanocrystalline Nuclear Graphite",
volume = "37",
number = "1",
pages = "11-17",
doi = "10.2298/NTRP2201011L"
}
Lukić, V. D., Spasojević, M., Luković, M., Spasojević, M.,& Maričić, A.. (2022). Hydrogen Adsorption Process In Nanocrystalline Nuclear Graphite. in Nuclear Technology and Radiation Protection
Belgrade : Vinča Institute of Nuclear Sciences., 37(1), 11-17.
https://doi.org/10.2298/NTRP2201011L
Lukić VD, Spasojević M, Luković M, Spasojević M, Maričić A. Hydrogen Adsorption Process In Nanocrystalline Nuclear Graphite. in Nuclear Technology and Radiation Protection. 2022;37(1):11-17.
doi:10.2298/NTRP2201011L .
Lukić, Vladimir D., Spasojević, Milica , Luković, Milentije, Spasojević, Miroslav, Maričić, Aleksa, "Hydrogen Adsorption Process In Nanocrystalline Nuclear Graphite" in Nuclear Technology and Radiation Protection, 37, no. 1 (2022):11-17,
https://doi.org/10.2298/NTRP2201011L . .

Optimization of phenol removal with horseradish peroxidase encapsulated within tyramine-alginate micro-beads

Pantić, Nevena; Prodanović, Radivoje; Ilić Đurđić, Karla; Polović, Natalija; Spasojević, Milica; Prodanović, Olivera

(Elsevier, 2021)

TY  - JOUR
AU  - Pantić, Nevena
AU  - Prodanović, Radivoje
AU  - Ilić Đurđić, Karla
AU  - Polović, Natalija
AU  - Spasojević, Milica
AU  - Prodanović, Olivera
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4768
AB  - Removal of phenolic compounds from water is of major interest over the years, since they are one of the most common pollutants in aqueous systems. Horseradish peroxidase (HRP) is the most investigated biocatalyst for this purpose. Inactivation of the enzyme is a major issue which can be successfully overcome by the enzyme immobilization on different polymers. In this study, tyramine-alginate micro-beads were used as carriers for the immobilization of horseradish peroxidase. The effect of the oxidation degree of tyramine-alginates on a specific activity of the enzyme was tested. An increase in the concentration of oxidized alginate from 2.5 to 20% resulted in a gradual increase in the specific activity from 0.05 to 0.67 U/mL. HRP immobilized within these micro-beads was tested for the phenol removal in a batch reactor. Reaction conditions were optimized to achieve a high removal efficiency and substantial reusability of the system. In this study, for the first time, an internal generation of hydrogen peroxide from glucose and glucose oxidase was employed in the phenol removal process with HRP immobilized on tyramine-alginate. Within 6 h of repeated use 96% of phenol was removed when the system for internal delivery of H2O2, composed of 0.187 U/mL of glucose oxidase and 4 mmol/L of glucose was employed. A common straightforward addition of hydrogen peroxide provided the removal efficiency of only 42%, under the same reaction conditions. The highest efficiency of the phenol removal (96%) was obtained with HRP immobilized within 20 mol% oxidized tyramine-alginate micro-beads. Fifteen mol% oxidized tyramine-alginate showed lower removal efficiency in the first cycle of use (73%) but more promising reusability, since the immobilized enzyme retained 61% of its initial activity even after four consecutive cycles of use.
PB  - Elsevier
T2  - Environmental Technology & Innovation
T2  - Environmental Technology & InnovationEnvironmental Technology & Innovation
T1  - Optimization of phenol removal with horseradish peroxidase encapsulated within tyramine-alginate micro-beads
VL  - 21
SP  - 101211
DO  - 10.1016/j.eti.2020.101211
ER  - 
@article{
author = "Pantić, Nevena and Prodanović, Radivoje and Ilić Đurđić, Karla and Polović, Natalija and Spasojević, Milica and Prodanović, Olivera",
year = "2021",
abstract = "Removal of phenolic compounds from water is of major interest over the years, since they are one of the most common pollutants in aqueous systems. Horseradish peroxidase (HRP) is the most investigated biocatalyst for this purpose. Inactivation of the enzyme is a major issue which can be successfully overcome by the enzyme immobilization on different polymers. In this study, tyramine-alginate micro-beads were used as carriers for the immobilization of horseradish peroxidase. The effect of the oxidation degree of tyramine-alginates on a specific activity of the enzyme was tested. An increase in the concentration of oxidized alginate from 2.5 to 20% resulted in a gradual increase in the specific activity from 0.05 to 0.67 U/mL. HRP immobilized within these micro-beads was tested for the phenol removal in a batch reactor. Reaction conditions were optimized to achieve a high removal efficiency and substantial reusability of the system. In this study, for the first time, an internal generation of hydrogen peroxide from glucose and glucose oxidase was employed in the phenol removal process with HRP immobilized on tyramine-alginate. Within 6 h of repeated use 96% of phenol was removed when the system for internal delivery of H2O2, composed of 0.187 U/mL of glucose oxidase and 4 mmol/L of glucose was employed. A common straightforward addition of hydrogen peroxide provided the removal efficiency of only 42%, under the same reaction conditions. The highest efficiency of the phenol removal (96%) was obtained with HRP immobilized within 20 mol% oxidized tyramine-alginate micro-beads. Fifteen mol% oxidized tyramine-alginate showed lower removal efficiency in the first cycle of use (73%) but more promising reusability, since the immobilized enzyme retained 61% of its initial activity even after four consecutive cycles of use.",
publisher = "Elsevier",
journal = "Environmental Technology & Innovation, Environmental Technology & InnovationEnvironmental Technology & Innovation",
title = "Optimization of phenol removal with horseradish peroxidase encapsulated within tyramine-alginate micro-beads",
volume = "21",
pages = "101211",
doi = "10.1016/j.eti.2020.101211"
}
Pantić, N., Prodanović, R., Ilić Đurđić, K., Polović, N., Spasojević, M.,& Prodanović, O.. (2021). Optimization of phenol removal with horseradish peroxidase encapsulated within tyramine-alginate micro-beads. in Environmental Technology & Innovation
Elsevier., 21, 101211.
https://doi.org/10.1016/j.eti.2020.101211
Pantić N, Prodanović R, Ilić Đurđić K, Polović N, Spasojević M, Prodanović O. Optimization of phenol removal with horseradish peroxidase encapsulated within tyramine-alginate micro-beads. in Environmental Technology & Innovation. 2021;21:101211.
doi:10.1016/j.eti.2020.101211 .
Pantić, Nevena, Prodanović, Radivoje, Ilić Đurđić, Karla, Polović, Natalija, Spasojević, Milica, Prodanović, Olivera, "Optimization of phenol removal with horseradish peroxidase encapsulated within tyramine-alginate micro-beads" in Environmental Technology & Innovation, 21 (2021):101211,
https://doi.org/10.1016/j.eti.2020.101211 . .
20
5
19

Electrooxidation of 1-propanol on the mixture of nanoparticles of Pt and RuO2

Spasojević, Milica; Ribić-Zelenović, Lenka; Spasojević, Miroslav

(Springer Link, 2021)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Ribić-Zelenović, Lenka
AU  - Spasojević, Miroslav
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4529
AB  - The catalyst composed of a mixture of nanocrystals of metallic Pt and rutile RuO2 was prepared by a thermal procedure on a titanium substrate. An effect of the mixture composition on its microstructure, surface properties, and catalytic activity for an electrooxidation of 1-propanol in an alkaline environment was examined. The relation between the microstructure of the Pt/RuO2 catalyst and its catalytic activity was determined. It was found that the increase in the RuO2 content resulted in the increase in the catalytic activity, which reached its maximum value and then decreased. The catalytic effect was caused by the bifunctional mechanism of the catalyst Pt/RuO2. Ru-OH species were formed on Ru atoms of RuO2 nanocrystals at more negative potentials than on Pt. These oxy species oxidized firmly adsorbed intermediates propionyl, COad, C2Hyad, and CHad and, thus, released Pt atoms for the adsorption and dehydrogenation of the subsequent molecules of 1-propanol.
PB  - Springer Link
T2  - Monatshefte für Chemie - Chemical Monthly
T1  - Electrooxidation of 1-propanol on the mixture of nanoparticles of Pt and RuO2
VL  - 152
IS  - 5
SP  - 489
EP  - 496
DO  - 10.1007/s00706-021-02769-9
ER  - 
@article{
author = "Spasojević, Milica and Ribić-Zelenović, Lenka and Spasojević, Miroslav",
year = "2021",
abstract = "The catalyst composed of a mixture of nanocrystals of metallic Pt and rutile RuO2 was prepared by a thermal procedure on a titanium substrate. An effect of the mixture composition on its microstructure, surface properties, and catalytic activity for an electrooxidation of 1-propanol in an alkaline environment was examined. The relation between the microstructure of the Pt/RuO2 catalyst and its catalytic activity was determined. It was found that the increase in the RuO2 content resulted in the increase in the catalytic activity, which reached its maximum value and then decreased. The catalytic effect was caused by the bifunctional mechanism of the catalyst Pt/RuO2. Ru-OH species were formed on Ru atoms of RuO2 nanocrystals at more negative potentials than on Pt. These oxy species oxidized firmly adsorbed intermediates propionyl, COad, C2Hyad, and CHad and, thus, released Pt atoms for the adsorption and dehydrogenation of the subsequent molecules of 1-propanol.",
publisher = "Springer Link",
journal = "Monatshefte für Chemie - Chemical Monthly",
title = "Electrooxidation of 1-propanol on the mixture of nanoparticles of Pt and RuO2",
volume = "152",
number = "5",
pages = "489-496",
doi = "10.1007/s00706-021-02769-9"
}
Spasojević, M., Ribić-Zelenović, L.,& Spasojević, M.. (2021). Electrooxidation of 1-propanol on the mixture of nanoparticles of Pt and RuO2. in Monatshefte für Chemie - Chemical Monthly
Springer Link., 152(5), 489-496.
https://doi.org/10.1007/s00706-021-02769-9
Spasojević M, Ribić-Zelenović L, Spasojević M. Electrooxidation of 1-propanol on the mixture of nanoparticles of Pt and RuO2. in Monatshefte für Chemie - Chemical Monthly. 2021;152(5):489-496.
doi:10.1007/s00706-021-02769-9 .
Spasojević, Milica, Ribić-Zelenović, Lenka, Spasojević, Miroslav, "Electrooxidation of 1-propanol on the mixture of nanoparticles of Pt and RuO2" in Monatshefte für Chemie - Chemical Monthly, 152, no. 5 (2021):489-496,
https://doi.org/10.1007/s00706-021-02769-9 . .
1
6
6

Methanol Electrooxidation on Pt/RuO2 Catalyst

Spasojević, Milica; Ribić-Zelenović, Lenka; Spasojević, Miroslav; Marković, Dušan

(Springer, 2021)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Ribić-Zelenović, Lenka
AU  - Spasojević, Miroslav
AU  - Marković, Dušan
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4742
AB  - A catalytic coating, composed of a mixture of nanocrystals of Pt and RuO2, used for oxidation of CH3OH, was formed by the thermal procedure. The size of the RuO2 nanocrystals was increasing and of Pt was decreasing with increasing the content of RuO2. The optimal coating composition depended on potential. At more positive potentials, the optimal coatings contained lower amounts of RuO2. The oxidation reaction of CH3OH on the coatings with the RuO2 content higher than optimal, was determined by dehydrogenization of CH3OH. At lower amounts of RuO2, oxidation of CH3OH was determined by the oxidation reaction of intermediates COad with oxy species of ruthenium. The catalytic effect was caused by a bifunctional mechanism. The bifunctional mechanism is based on the fact that oxy species were formed on Ru at more negative potentials than on Pt. These oxy species oxidized COad intermediates, bound to adjacent Pt atoms and thus discharged them for dehydrogenation of the subsequent CH3OH molecules.
PB  - Springer
T2  - Russian Journal of Electrochemistry
T1  - Methanol Electrooxidation on Pt/RuO2 Catalyst
VL  - 57
IS  - 7
SP  - 795
EP  - 807
DO  - 10.1134/S1023193520120253
ER  - 
@article{
author = "Spasojević, Milica and Ribić-Zelenović, Lenka and Spasojević, Miroslav and Marković, Dušan",
year = "2021",
abstract = "A catalytic coating, composed of a mixture of nanocrystals of Pt and RuO2, used for oxidation of CH3OH, was formed by the thermal procedure. The size of the RuO2 nanocrystals was increasing and of Pt was decreasing with increasing the content of RuO2. The optimal coating composition depended on potential. At more positive potentials, the optimal coatings contained lower amounts of RuO2. The oxidation reaction of CH3OH on the coatings with the RuO2 content higher than optimal, was determined by dehydrogenization of CH3OH. At lower amounts of RuO2, oxidation of CH3OH was determined by the oxidation reaction of intermediates COad with oxy species of ruthenium. The catalytic effect was caused by a bifunctional mechanism. The bifunctional mechanism is based on the fact that oxy species were formed on Ru at more negative potentials than on Pt. These oxy species oxidized COad intermediates, bound to adjacent Pt atoms and thus discharged them for dehydrogenation of the subsequent CH3OH molecules.",
publisher = "Springer",
journal = "Russian Journal of Electrochemistry",
title = "Methanol Electrooxidation on Pt/RuO2 Catalyst",
volume = "57",
number = "7",
pages = "795-807",
doi = "10.1134/S1023193520120253"
}
Spasojević, M., Ribić-Zelenović, L., Spasojević, M.,& Marković, D.. (2021). Methanol Electrooxidation on Pt/RuO2 Catalyst. in Russian Journal of Electrochemistry
Springer., 57(7), 795-807.
https://doi.org/10.1134/S1023193520120253
Spasojević M, Ribić-Zelenović L, Spasojević M, Marković D. Methanol Electrooxidation on Pt/RuO2 Catalyst. in Russian Journal of Electrochemistry. 2021;57(7):795-807.
doi:10.1134/S1023193520120253 .
Spasojević, Milica, Ribić-Zelenović, Lenka, Spasojević, Miroslav, Marković, Dušan, "Methanol Electrooxidation on Pt/RuO2 Catalyst" in Russian Journal of Electrochemistry, 57, no. 7 (2021):795-807,
https://doi.org/10.1134/S1023193520120253 . .
2
3

Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study

Spasojević, Pavle M.; Šešlija, Sanja; Marković, Maja; Pantić, Olga; Antić, Katarina; Spasojević, Milica

(MDPI, 2021)

TY  - JOUR
AU  - Spasojević, Pavle M.
AU  - Šešlija, Sanja
AU  - Marković, Maja
AU  - Pantić, Olga
AU  - Antić, Katarina
AU  - Spasojević, Milica
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4797
AB  - Nowadays, unsaturated polyester resins (UPR) are mainly obtained from non-renewable resources. The ever-increasing regulations and the continuous demand for more sustainability have led to extensive research towards more environmentally suitable alternatives to petroleum-based materials. However, one of the main disadvantages of bio-based UPR is their relatively high viscosity compared to petrochemical ones. In order to overcome this drawback, in this work, we investigated the possibility to lower the resin viscosity utilizing a mixture of dimethyl itaconate (DMI) and methyl methacrylate (MMA) as a reactive diluent. The effect of the DMI and MMA ratio on resin rheological properties was investigated. The optimal curing parameters were determined and all UPRs had a high gel content, which was shown to be dependent on the DMI and MMA ratio in the formulation. Furthermore, thermomechanical and mechanical properties of the resulting network were also found to be affected by the used reactive diluent mixture. A small substitution of DMI by MMA proved to be advantageous since it offers lower resin viscosity and improved mechanical properties.
PB  - MDPI
T2  - Polymers
T1  - Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study
VL  - 13
IS  - 16
SP  - 2667
DO  - 10.3390/polym13162667
ER  - 
@article{
author = "Spasojević, Pavle M. and Šešlija, Sanja and Marković, Maja and Pantić, Olga and Antić, Katarina and Spasojević, Milica",
year = "2021",
abstract = "Nowadays, unsaturated polyester resins (UPR) are mainly obtained from non-renewable resources. The ever-increasing regulations and the continuous demand for more sustainability have led to extensive research towards more environmentally suitable alternatives to petroleum-based materials. However, one of the main disadvantages of bio-based UPR is their relatively high viscosity compared to petrochemical ones. In order to overcome this drawback, in this work, we investigated the possibility to lower the resin viscosity utilizing a mixture of dimethyl itaconate (DMI) and methyl methacrylate (MMA) as a reactive diluent. The effect of the DMI and MMA ratio on resin rheological properties was investigated. The optimal curing parameters were determined and all UPRs had a high gel content, which was shown to be dependent on the DMI and MMA ratio in the formulation. Furthermore, thermomechanical and mechanical properties of the resulting network were also found to be affected by the used reactive diluent mixture. A small substitution of DMI by MMA proved to be advantageous since it offers lower resin viscosity and improved mechanical properties.",
publisher = "MDPI",
journal = "Polymers",
title = "Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study",
volume = "13",
number = "16",
pages = "2667",
doi = "10.3390/polym13162667"
}
Spasojević, P. M., Šešlija, S., Marković, M., Pantić, O., Antić, K.,& Spasojević, M.. (2021). Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study. in Polymers
MDPI., 13(16), 2667.
https://doi.org/10.3390/polym13162667
Spasojević PM, Šešlija S, Marković M, Pantić O, Antić K, Spasojević M. Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study. in Polymers. 2021;13(16):2667.
doi:10.3390/polym13162667 .
Spasojević, Pavle M., Šešlija, Sanja, Marković, Maja, Pantić, Olga, Antić, Katarina, Spasojević, Milica, "Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study" in Polymers, 13, no. 16 (2021):2667,
https://doi.org/10.3390/polym13162667 . .
3
10
1
8

A catalyst coated electrode for electrochemical formaldehyde oxidation

Spasojević, Milica; Spasojević, Miroslav; Ribić-Zelenović, Lenka

(Springer, 2020)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Spasojević, Miroslav
AU  - Ribić-Zelenović, Lenka
PY  - 2020
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3822
AB  - Thermally prepared catalytic coatings on a titanium substrate were composed of a mixture of nanocrystals of metallic Pt and RuO2 of rutile structure and used for electrooxidation of formaldehyde. The size of the RuO2 nanocrystals increased, whereas those of Pt decreased with increasing the content of RuO2 in the mixture. At more positive potentials, the maximum catalytic activities showed the coatings with lower content of RuO2. Mechanism of formaldehyde oxidation was derived to show two reaction pathways. In the first one, H2C(OH)2 was directly oxidized to CO2, whereas COad was formed in the latter. COad is strongly adsorbed on Pt atoms, which causes blocking of these atoms and thus, preventing direct dehydrogenation of H2C(OH)2 to CO2. The overall catalytic effect of the mixture of nanocrystals was caused by the bifunctional mechanism. Thus, the Ru atoms formed the oxy species at more negative potentials than Pt. These oxy species oxidized the COad intermediates, bound to adjacent Pt atoms and accordingly, discharged them for dehydrogenation of new molecules of H2C(OH)2.
PB  - Springer
T2  - Monatshefte fur Chemie
T1  - A catalyst coated electrode for electrochemical formaldehyde oxidation
VL  - 151
IS  - 1
SP  - 33
EP  - 43
DO  - 10.1007/s00706-019-02533-0
ER  - 
@article{
author = "Spasojević, Milica and Spasojević, Miroslav and Ribić-Zelenović, Lenka",
year = "2020",
abstract = "Thermally prepared catalytic coatings on a titanium substrate were composed of a mixture of nanocrystals of metallic Pt and RuO2 of rutile structure and used for electrooxidation of formaldehyde. The size of the RuO2 nanocrystals increased, whereas those of Pt decreased with increasing the content of RuO2 in the mixture. At more positive potentials, the maximum catalytic activities showed the coatings with lower content of RuO2. Mechanism of formaldehyde oxidation was derived to show two reaction pathways. In the first one, H2C(OH)2 was directly oxidized to CO2, whereas COad was formed in the latter. COad is strongly adsorbed on Pt atoms, which causes blocking of these atoms and thus, preventing direct dehydrogenation of H2C(OH)2 to CO2. The overall catalytic effect of the mixture of nanocrystals was caused by the bifunctional mechanism. Thus, the Ru atoms formed the oxy species at more negative potentials than Pt. These oxy species oxidized the COad intermediates, bound to adjacent Pt atoms and accordingly, discharged them for dehydrogenation of new molecules of H2C(OH)2.",
publisher = "Springer",
journal = "Monatshefte fur Chemie",
title = "A catalyst coated electrode for electrochemical formaldehyde oxidation",
volume = "151",
number = "1",
pages = "33-43",
doi = "10.1007/s00706-019-02533-0"
}
Spasojević, M., Spasojević, M.,& Ribić-Zelenović, L.. (2020). A catalyst coated electrode for electrochemical formaldehyde oxidation. in Monatshefte fur Chemie
Springer., 151(1), 33-43.
https://doi.org/10.1007/s00706-019-02533-0
Spasojević M, Spasojević M, Ribić-Zelenović L. A catalyst coated electrode for electrochemical formaldehyde oxidation. in Monatshefte fur Chemie. 2020;151(1):33-43.
doi:10.1007/s00706-019-02533-0 .
Spasojević, Milica, Spasojević, Miroslav, Ribić-Zelenović, Lenka, "A catalyst coated electrode for electrochemical formaldehyde oxidation" in Monatshefte fur Chemie, 151, no. 1 (2020):33-43,
https://doi.org/10.1007/s00706-019-02533-0 . .
7
5
7

Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders

Spasojević, Miroslav; Ranđić, Siniša; Maričić, Aleksa; Trišović, Tomislav; Spasojević, Milica

(Springer, 2020)

TY  - JOUR
AU  - Spasojević, Miroslav
AU  - Ranđić, Siniša
AU  - Maričić, Aleksa
AU  - Trišović, Tomislav
AU  - Spasojević, Milica
PY  - 2020
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4044
AB  - Nanostructured Ni-Fe-W-Cu alloy powders were electrodeposited from an alkaline ammonium citrate solution on a titanium cathode. Powder particles were dendrite- and cauliflower-shaped. The dendritic particles had a high density of branches made up of interconnected globules. XRD analysis showed that the powder contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. As the deposition current density increased, the mean nanocrystal size decreased, and the mean value of internal microstrain and the total weight percent of Fe and Ni in the alloy increased. The powders deposited at higher current densities exhibited higher magnetization. During annealing at temperatures up to 460 °C, the powders underwent short-range ordering, which caused an increase in magnetization, whereas at temperatures above 460 °C, the magnetization decreased due to the formation of large FCC crystalline grains.
PB  - Springer
T2  - Science of Sintering
T1  - Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders
VL  - 52
IS  - 1
SP  - 109
EP  - 121
DO  - 10.2298/SOS2001109S
ER  - 
@article{
author = "Spasojević, Miroslav and Ranđić, Siniša and Maričić, Aleksa and Trišović, Tomislav and Spasojević, Milica",
year = "2020",
abstract = "Nanostructured Ni-Fe-W-Cu alloy powders were electrodeposited from an alkaline ammonium citrate solution on a titanium cathode. Powder particles were dendrite- and cauliflower-shaped. The dendritic particles had a high density of branches made up of interconnected globules. XRD analysis showed that the powder contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. As the deposition current density increased, the mean nanocrystal size decreased, and the mean value of internal microstrain and the total weight percent of Fe and Ni in the alloy increased. The powders deposited at higher current densities exhibited higher magnetization. During annealing at temperatures up to 460 °C, the powders underwent short-range ordering, which caused an increase in magnetization, whereas at temperatures above 460 °C, the magnetization decreased due to the formation of large FCC crystalline grains.",
publisher = "Springer",
journal = "Science of Sintering",
title = "Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders",
volume = "52",
number = "1",
pages = "109-121",
doi = "10.2298/SOS2001109S"
}
Spasojević, M., Ranđić, S., Maričić, A., Trišović, T.,& Spasojević, M.. (2020). Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders. in Science of Sintering
Springer., 52(1), 109-121.
https://doi.org/10.2298/SOS2001109S
Spasojević M, Ranđić S, Maričić A, Trišović T, Spasojević M. Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders. in Science of Sintering. 2020;52(1):109-121.
doi:10.2298/SOS2001109S .
Spasojević, Miroslav, Ranđić, Siniša, Maričić, Aleksa, Trišović, Tomislav, Spasojević, Milica, "Morphological, microstructural and magnetic characteristics of electrodeposited Ni-Fe-W-Cu alloy powders" in Science of Sintering, 52, no. 1 (2020):109-121,
https://doi.org/10.2298/SOS2001109S . .
1
2
3

The effect of annealing and frequency of the external magnetic field on magnetic properties of nanostructured electrodeposit of the Ni86,0Fe9,8W1,3Cu2,9 alloy

Spasojević, Milica; Plazinić, Milan; Luković, Milentije; Maričić, Aleksa; Spasojević, Miroslav

(Elsevier, 2020)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Plazinić, Milan
AU  - Luković, Milentije
AU  - Maričić, Aleksa
AU  - Spasojević, Miroslav
PY  - 2020
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4256
AB  - A nanostructured powder of the Ni86,0Fe9,8W1,3Cu2,9 alloy is deposited on a titanium cathode by electrodeposition from the citrate bath, at the current density of 400 mA cm−2. The powder particles are of a cauliflower and dendritic shape and composed of nanocrystals of the FCC phase of the solid solution of iron, tungsten and copper in nickel, captive in an amorphous matrix. The freshly deposited powder is thermally stable up to 160 °C. The annealing of the powder in the temperature range from 160 °C to 460 °C results in its structure relaxation. At temperatures higher than 460 °C, the amorphous phase in the powder is crystalizing and crystal grains of the FCC solid solution are growing. The structural changes caused by annealing, affect magnetic properties of the alloy. The cooled powders after the structure relaxation have higher magnetization, a lower loss of the active power and a lower coercive field. Crystallization of the amorphous phase and crystalline grain growth of the FCC phase causes a decrease in magnetization, an increase in the power loss and the power of coercive field.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - The effect of annealing and frequency of the external magnetic field on magnetic properties of nanostructured electrodeposit of the Ni86,0Fe9,8W1,3Cu2,9 alloy
VL  - 254
DO  - 10.1016/j.matchemphys.2020.123513
ER  - 
@article{
author = "Spasojević, Milica and Plazinić, Milan and Luković, Milentije and Maričić, Aleksa and Spasojević, Miroslav",
year = "2020",
abstract = "A nanostructured powder of the Ni86,0Fe9,8W1,3Cu2,9 alloy is deposited on a titanium cathode by electrodeposition from the citrate bath, at the current density of 400 mA cm−2. The powder particles are of a cauliflower and dendritic shape and composed of nanocrystals of the FCC phase of the solid solution of iron, tungsten and copper in nickel, captive in an amorphous matrix. The freshly deposited powder is thermally stable up to 160 °C. The annealing of the powder in the temperature range from 160 °C to 460 °C results in its structure relaxation. At temperatures higher than 460 °C, the amorphous phase in the powder is crystalizing and crystal grains of the FCC solid solution are growing. The structural changes caused by annealing, affect magnetic properties of the alloy. The cooled powders after the structure relaxation have higher magnetization, a lower loss of the active power and a lower coercive field. Crystallization of the amorphous phase and crystalline grain growth of the FCC phase causes a decrease in magnetization, an increase in the power loss and the power of coercive field.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "The effect of annealing and frequency of the external magnetic field on magnetic properties of nanostructured electrodeposit of the Ni86,0Fe9,8W1,3Cu2,9 alloy",
volume = "254",
doi = "10.1016/j.matchemphys.2020.123513"
}
Spasojević, M., Plazinić, M., Luković, M., Maričić, A.,& Spasojević, M.. (2020). The effect of annealing and frequency of the external magnetic field on magnetic properties of nanostructured electrodeposit of the Ni86,0Fe9,8W1,3Cu2,9 alloy. in Materials Chemistry and Physics
Elsevier., 254.
https://doi.org/10.1016/j.matchemphys.2020.123513
Spasojević M, Plazinić M, Luković M, Maričić A, Spasojević M. The effect of annealing and frequency of the external magnetic field on magnetic properties of nanostructured electrodeposit of the Ni86,0Fe9,8W1,3Cu2,9 alloy. in Materials Chemistry and Physics. 2020;254.
doi:10.1016/j.matchemphys.2020.123513 .
Spasojević, Milica, Plazinić, Milan, Luković, Milentije, Maričić, Aleksa, Spasojević, Miroslav, "The effect of annealing and frequency of the external magnetic field on magnetic properties of nanostructured electrodeposit of the Ni86,0Fe9,8W1,3Cu2,9 alloy" in Materials Chemistry and Physics, 254 (2020),
https://doi.org/10.1016/j.matchemphys.2020.123513 . .

The effect of the composition of the alloy of ruo2 and pt nanocrystals on intermediate adsorption during methanol oxidation

Spasojević, Milica; Ribić-Zelenović, Lenka; Spasojević, Miroslav; Trišović, Tomislav

(Academia Romana, 2020)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Ribić-Zelenović, Lenka
AU  - Spasojević, Miroslav
AU  - Trišović, Tomislav
PY  - 2020
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4273
AB  - A catalytic coating composed of a mixture of RuO2 and Pt
nanocrystals was prepared by a thermal procedure on a titanium
substrate and used for the electrochemical oxidation of methanol.
The adsorption of the intermediate CO, formed by methanol
oxidation on Pt nanocrystals, depended on potential and the
coating composition. An increase in the RuO2 content decreased
the rate of methanol dehydrogenation and increased the rate of
oxidation of the strongly bound intermediate COad. This caused a
decrease in the maximum coverage of Pt nanocrystals with COad
and a shift of the rapid linear drop in COad coverage to more
negative potentials.
PB  - Academia Romana
T2  - Revue Roumaine de Chimie
T1  - The effect of the composition of the alloy of ruo2 and pt nanocrystals on intermediate adsorption during methanol oxidation
VL  - 65
IS  - 5
SP  - 481
EP  - 489
DO  - 10.33224/rrch.2020.65.5.08
ER  - 
@article{
author = "Spasojević, Milica and Ribić-Zelenović, Lenka and Spasojević, Miroslav and Trišović, Tomislav",
year = "2020",
abstract = "A catalytic coating composed of a mixture of RuO2 and Pt
nanocrystals was prepared by a thermal procedure on a titanium
substrate and used for the electrochemical oxidation of methanol.
The adsorption of the intermediate CO, formed by methanol
oxidation on Pt nanocrystals, depended on potential and the
coating composition. An increase in the RuO2 content decreased
the rate of methanol dehydrogenation and increased the rate of
oxidation of the strongly bound intermediate COad. This caused a
decrease in the maximum coverage of Pt nanocrystals with COad
and a shift of the rapid linear drop in COad coverage to more
negative potentials.",
publisher = "Academia Romana",
journal = "Revue Roumaine de Chimie",
title = "The effect of the composition of the alloy of ruo2 and pt nanocrystals on intermediate adsorption during methanol oxidation",
volume = "65",
number = "5",
pages = "481-489",
doi = "10.33224/rrch.2020.65.5.08"
}
Spasojević, M., Ribić-Zelenović, L., Spasojević, M.,& Trišović, T.. (2020). The effect of the composition of the alloy of ruo2 and pt nanocrystals on intermediate adsorption during methanol oxidation. in Revue Roumaine de Chimie
Academia Romana., 65(5), 481-489.
https://doi.org/10.33224/rrch.2020.65.5.08
Spasojević M, Ribić-Zelenović L, Spasojević M, Trišović T. The effect of the composition of the alloy of ruo2 and pt nanocrystals on intermediate adsorption during methanol oxidation. in Revue Roumaine de Chimie. 2020;65(5):481-489.
doi:10.33224/rrch.2020.65.5.08 .
Spasojević, Milica, Ribić-Zelenović, Lenka, Spasojević, Miroslav, Trišović, Tomislav, "The effect of the composition of the alloy of ruo2 and pt nanocrystals on intermediate adsorption during methanol oxidation" in Revue Roumaine de Chimie, 65, no. 5 (2020):481-489,
https://doi.org/10.33224/rrch.2020.65.5.08 . .
5
2
5

Effect of deposition current density and annealing temperature on the microstructure and magnetic properties of nanostructured ni-fe-w-cu alloys

Spasojević, Milica; Marković, Dušan; Spasojević, Miroslav; Vuković, Zoran; Maričić, Aleksa; Ribić-Zelenović, Lenka

(2019)

TY  - JOUR
AU  - Spasojević, Milica
AU  - Marković, Dušan
AU  - Spasojević, Miroslav
AU  - Vuković, Zoran
AU  - Maričić, Aleksa
AU  - Ribić-Zelenović, Lenka
PY  - 2019
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/3325
AB  - Ni-Fe-W-Cu alloy powders were obtained by electrodeposition from an ammonium citrate bath at current densities ranging between 70 and 600 mA cm-2. As the deposition current density increased, the contents of Fe and W in the alloy increased, and those of Ni and Cu decreased. The total cathodic polarization curve was recorded, and partial polarization curves for Ni, Fe and W deposition and hydrogen evolution were determined. The current efficiency of alloy deposition was measured. The powders contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. At high current densities, small-sized nanocrystals exhibiting high internal microstrain values were formed. Powder particles were dendrite-and cauliflower-shaped. The dendrites had a large number of secondary branches and higher-order branches containing interconnected globules. The density of branches was higher in particles formed at high current densities. The powders formed at high current densities exhibited higher magnetization. Annealing at temperatures up to 460 °C resulted in structural relaxation, accompanied by an increase in magnetization. At temperatures above 460 °C, amorphous matrix crystallization and FCC crystal growth took place, accompanied by a decrease in magnetization.
T2  - Science of Sintering
T1  - Effect of deposition current density and annealing temperature on the microstructure and magnetic properties of nanostructured ni-fe-w-cu alloys
VL  - 51
IS  - 2
SP  - 1
EP  - 13
DO  - 10.2298/SOS1902209S
ER  - 
@article{
author = "Spasojević, Milica and Marković, Dušan and Spasojević, Miroslav and Vuković, Zoran and Maričić, Aleksa and Ribić-Zelenović, Lenka",
year = "2019",
abstract = "Ni-Fe-W-Cu alloy powders were obtained by electrodeposition from an ammonium citrate bath at current densities ranging between 70 and 600 mA cm-2. As the deposition current density increased, the contents of Fe and W in the alloy increased, and those of Ni and Cu decreased. The total cathodic polarization curve was recorded, and partial polarization curves for Ni, Fe and W deposition and hydrogen evolution were determined. The current efficiency of alloy deposition was measured. The powders contained an amorphous matrix and FCC nanocrystals of the solid solution of Fe, W and Cu in Ni. At high current densities, small-sized nanocrystals exhibiting high internal microstrain values were formed. Powder particles were dendrite-and cauliflower-shaped. The dendrites had a large number of secondary branches and higher-order branches containing interconnected globules. The density of branches was higher in particles formed at high current densities. The powders formed at high current densities exhibited higher magnetization. Annealing at temperatures up to 460 °C resulted in structural relaxation, accompanied by an increase in magnetization. At temperatures above 460 °C, amorphous matrix crystallization and FCC crystal growth took place, accompanied by a decrease in magnetization.",
journal = "Science of Sintering",
title = "Effect of deposition current density and annealing temperature on the microstructure and magnetic properties of nanostructured ni-fe-w-cu alloys",
volume = "51",
number = "2",
pages = "1-13",
doi = "10.2298/SOS1902209S"
}
Spasojević, M., Marković, D., Spasojević, M., Vuković, Z., Maričić, A.,& Ribić-Zelenović, L.. (2019). Effect of deposition current density and annealing temperature on the microstructure and magnetic properties of nanostructured ni-fe-w-cu alloys. in Science of Sintering, 51(2), 1-13.
https://doi.org/10.2298/SOS1902209S
Spasojević M, Marković D, Spasojević M, Vuković Z, Maričić A, Ribić-Zelenović L. Effect of deposition current density and annealing temperature on the microstructure and magnetic properties of nanostructured ni-fe-w-cu alloys. in Science of Sintering. 2019;51(2):1-13.
doi:10.2298/SOS1902209S .
Spasojević, Milica, Marković, Dušan, Spasojević, Miroslav, Vuković, Zoran, Maričić, Aleksa, Ribić-Zelenović, Lenka, "Effect of deposition current density and annealing temperature on the microstructure and magnetic properties of nanostructured ni-fe-w-cu alloys" in Science of Sintering, 51, no. 2 (2019):1-13,
https://doi.org/10.2298/SOS1902209S . .
2
3
3

Mathematical Model of the Catalytic Effect of Chromium(VI) on Hypochlorite Disproportionation in Chlorate Electrolysis

Spasojević, Miroslav; Marković, Dušan; Trišović, Tomislav Lj.; Spasojević, Milica

(Electrochemical Soc Inc, Pennington, 2018)

TY  - JOUR
AU  - Spasojević, Miroslav
AU  - Marković, Dušan
AU  - Trišović, Tomislav Lj.
AU  - Spasojević, Milica
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2137
AB  - The effect of chromium(VI) on the kinetics of disproportionation of hypochlorous acid and hypochlorite was established in the solution for the electrolytic production of chlorate. The hexavalent chromium species Cr2O72-, HCrO4- and CrO42- present in the solution catalyze the disproportionation reaction. In both the absence and presence of chromium(VI), disproportionation is a third-order reaction with respect to HClO and ClO-, and a first-order reaction with respect to the hexavalent chromium species. In the presence of chromium(VI) ions, four parallel reactions probably take place in the solution i.e. uncatalyzed disproportionation and three parallel reactions catalyzed by Cr2O72-, HCrO4- and CrO42- ions. Most likely, the hexavalent chromium species do not change the sequence of elementary reactions in the disproportionation mechanism but only speed up the rate-determining step through interaction with its reactants. In the chlorate production process, as chromium(VI) concentration increases, the optimum pH which ensures the maximum rate of disproportionation is shifted to an acid environment. This is due to an increase in the concentration of the catalytically most active species HCrO4-with increasing acidity of the solution. A mathematical model of the kinetics of the chromium(VI)-catalyzed disproportionation of hypochlorite and hypochlorous acid into chlorate was set up. Good agreement was obtained between theoretical and experimental data. (c) 2018 The Electrochemical Society.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Mathematical Model of the Catalytic Effect of Chromium(VI) on Hypochlorite Disproportionation in Chlorate Electrolysis
VL  - 165
IS  - 2
DO  - 10.1149/2.0291802jes
ER  - 
@article{
author = "Spasojević, Miroslav and Marković, Dušan and Trišović, Tomislav Lj. and Spasojević, Milica",
year = "2018",
abstract = "The effect of chromium(VI) on the kinetics of disproportionation of hypochlorous acid and hypochlorite was established in the solution for the electrolytic production of chlorate. The hexavalent chromium species Cr2O72-, HCrO4- and CrO42- present in the solution catalyze the disproportionation reaction. In both the absence and presence of chromium(VI), disproportionation is a third-order reaction with respect to HClO and ClO-, and a first-order reaction with respect to the hexavalent chromium species. In the presence of chromium(VI) ions, four parallel reactions probably take place in the solution i.e. uncatalyzed disproportionation and three parallel reactions catalyzed by Cr2O72-, HCrO4- and CrO42- ions. Most likely, the hexavalent chromium species do not change the sequence of elementary reactions in the disproportionation mechanism but only speed up the rate-determining step through interaction with its reactants. In the chlorate production process, as chromium(VI) concentration increases, the optimum pH which ensures the maximum rate of disproportionation is shifted to an acid environment. This is due to an increase in the concentration of the catalytically most active species HCrO4-with increasing acidity of the solution. A mathematical model of the kinetics of the chromium(VI)-catalyzed disproportionation of hypochlorite and hypochlorous acid into chlorate was set up. Good agreement was obtained between theoretical and experimental data. (c) 2018 The Electrochemical Society.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Mathematical Model of the Catalytic Effect of Chromium(VI) on Hypochlorite Disproportionation in Chlorate Electrolysis",
volume = "165",
number = "2",
doi = "10.1149/2.0291802jes"
}
Spasojević, M., Marković, D., Trišović, T. Lj.,& Spasojević, M.. (2018). Mathematical Model of the Catalytic Effect of Chromium(VI) on Hypochlorite Disproportionation in Chlorate Electrolysis. in Journal of the Electrochemical Society
Electrochemical Soc Inc, Pennington., 165(2).
https://doi.org/10.1149/2.0291802jes
Spasojević M, Marković D, Trišović TL, Spasojević M. Mathematical Model of the Catalytic Effect of Chromium(VI) on Hypochlorite Disproportionation in Chlorate Electrolysis. in Journal of the Electrochemical Society. 2018;165(2).
doi:10.1149/2.0291802jes .
Spasojević, Miroslav, Marković, Dušan, Trišović, Tomislav Lj., Spasojević, Milica, "Mathematical Model of the Catalytic Effect of Chromium(VI) on Hypochlorite Disproportionation in Chlorate Electrolysis" in Journal of the Electrochemical Society, 165, no. 2 (2018),
https://doi.org/10.1149/2.0291802jes . .
12
8
12

Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders

Spasojević, Miroslav; Spasojević, Milica; Mašković, Pavle; Marković, Dušan; Ribić-Zelenović, Lenka

(Electrochemical Soc Inc, Pennington, 2018)

TY  - JOUR
AU  - Spasojević, Miroslav
AU  - Spasojević, Milica
AU  - Mašković, Pavle
AU  - Marković, Dušan
AU  - Ribić-Zelenović, Lenka
PY  - 2018
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2200
AB  - Powders of Ni-Co alloys containing small amounts of Cu were produced by electrodeposition from an ammonium bath. Cathodic polarization curves were recorded and partial current densities for alloy deposition and hydrogen evolution were determined. At a current density of 100 mA cm(-2), the electrodeposition process resulted in Ni79.1Co18.6Cu2.3 powder with an average grain size of 6.8 nm, composed of an amorphous matrix and FCC nanocrystals. The deposition of Cu with Ni and Co led to a higher proportion of the amorphous phase, smaller nanocrystals and smaller powder particles in the electrodeposit than in the alloy without copper. During annealing at temperatures ranging from 25 degrees C to 160 degrees C, no structural changes occurred in the powder. Upon structural relaxation in the temperature range of 160-350 degrees C, the powders cooled at 25 degrees C showed greater magnetic permeability. At temperatures between 350 degrees C and 430 degrees C, the amorphous phase exhibiting relatively lower magnetization underwent crystallization, accompanied by the formation of small-sized FCC nanocrystals, which had relatively higher magnetization values, leading to an increase in the magnetic permeability of the cooled powder. At temperatures above 430 degrees C, the formation of large crystalline grains at the expense of small ones caused a decrease in magnetization. (C) 2018 The Electrochemical Society.
PB  - Electrochemical Soc Inc, Pennington
T2  - Journal of the Electrochemical Society
T1  - Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders
VL  - 165
IS  - 11
DO  - 10.1149/2.0441811jes
ER  - 
@article{
author = "Spasojević, Miroslav and Spasojević, Milica and Mašković, Pavle and Marković, Dušan and Ribić-Zelenović, Lenka",
year = "2018",
abstract = "Powders of Ni-Co alloys containing small amounts of Cu were produced by electrodeposition from an ammonium bath. Cathodic polarization curves were recorded and partial current densities for alloy deposition and hydrogen evolution were determined. At a current density of 100 mA cm(-2), the electrodeposition process resulted in Ni79.1Co18.6Cu2.3 powder with an average grain size of 6.8 nm, composed of an amorphous matrix and FCC nanocrystals. The deposition of Cu with Ni and Co led to a higher proportion of the amorphous phase, smaller nanocrystals and smaller powder particles in the electrodeposit than in the alloy without copper. During annealing at temperatures ranging from 25 degrees C to 160 degrees C, no structural changes occurred in the powder. Upon structural relaxation in the temperature range of 160-350 degrees C, the powders cooled at 25 degrees C showed greater magnetic permeability. At temperatures between 350 degrees C and 430 degrees C, the amorphous phase exhibiting relatively lower magnetization underwent crystallization, accompanied by the formation of small-sized FCC nanocrystals, which had relatively higher magnetization values, leading to an increase in the magnetic permeability of the cooled powder. At temperatures above 430 degrees C, the formation of large crystalline grains at the expense of small ones caused a decrease in magnetization. (C) 2018 The Electrochemical Society.",
publisher = "Electrochemical Soc Inc, Pennington",
journal = "Journal of the Electrochemical Society",
title = "Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders",
volume = "165",
number = "11",
doi = "10.1149/2.0441811jes"
}
Spasojević, M., Spasojević, M., Mašković, P., Marković, D.,& Ribić-Zelenović, L.. (2018). Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders. in Journal of the Electrochemical Society
Electrochemical Soc Inc, Pennington., 165(11).
https://doi.org/10.1149/2.0441811jes
Spasojević M, Spasojević M, Mašković P, Marković D, Ribić-Zelenović L. Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders. in Journal of the Electrochemical Society. 2018;165(11).
doi:10.1149/2.0441811jes .
Spasojević, Miroslav, Spasojević, Milica, Mašković, Pavle, Marković, Dušan, Ribić-Zelenović, Lenka, "Electrodeposition, Microstructure and Magnetic Properties of Nickel-Cobalt-Copper Alloy Powders" in Journal of the Electrochemical Society, 165, no. 11 (2018),
https://doi.org/10.1149/2.0441811jes . .
3
2
3

Effect of the degree of plastic deformation on the thermal electromotive force of Cu-X5crni1810 steel thermocouple

Milićević, Ivan; Spasojević, Milica; Slavković, Radomir; Spasojević, Miroslav ; Maričić, Aleksa

(International Institute for the Science of Sintering, 2018)

TY  - JOUR
AU  - Milićević, Ivan
AU  - Spasojević, Milica
AU  - Slavković, Radomir
AU  - Spasojević, Miroslav

AU  - Maričić, Aleksa
PY  - 2018
AB  - The thermal electromotive force (TEMF) and the thermal electromotive force coefficient (TEMFC) of the thermocouple consisting of a copper wire and an (X5CrNi1810) steel wire plastically deformed under tension or bending conditions were found to increase with increasing degree of plastic deformation. The increase in the degree of deformation disturbs the microstructure of steel due to increases in the density of chaotically distributed dislocations and internal microstress, resulting in a decrease in the electron density of states near the Fermi level. Through the effect of thermal energy, annealing at elevated temperatures up to 300°C leads to microstructural ordering along with simultaneous increases in the free electron density of states, TEMF and TEMFC. Based on the temporal change of the TEMF, the kinetics of microstructural ordering was determined. During the initial time interval, the process is a kinetically controlled first-order reaction. In the second time interval, the process is controlled by the diffusion of reactant species.
PB  - International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Effect of the degree of plastic deformation on the thermal electromotive force of Cu-X5crni1810 steel thermocouple
VL  - 50
IS  - 4
SP  - 421
EP  - 432
DO  - 10.2298/SOS1804421M
ER  - 
@article{
author = "Milićević, Ivan and Spasojević, Milica and Slavković, Radomir and Spasojević, Miroslav
 and Maričić, Aleksa",
year = "2018",
abstract = "The thermal electromotive force (TEMF) and the thermal electromotive force coefficient (TEMFC) of the thermocouple consisting of a copper wire and an (X5CrNi1810) steel wire plastically deformed under tension or bending conditions were found to increase with increasing degree of plastic deformation. The increase in the degree of deformation disturbs the microstructure of steel due to increases in the density of chaotically distributed dislocations and internal microstress, resulting in a decrease in the electron density of states near the Fermi level. Through the effect of thermal energy, annealing at elevated temperatures up to 300°C leads to microstructural ordering along with simultaneous increases in the free electron density of states, TEMF and TEMFC. Based on the temporal change of the TEMF, the kinetics of microstructural ordering was determined. During the initial time interval, the process is a kinetically controlled first-order reaction. In the second time interval, the process is controlled by the diffusion of reactant species.",
publisher = "International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Effect of the degree of plastic deformation on the thermal electromotive force of Cu-X5crni1810 steel thermocouple",
volume = "50",
number = "4",
pages = "421-432",
doi = "10.2298/SOS1804421M"
}
Milićević, I., Spasojević, M., Slavković, R., Spasojević, M.,& Maričić, A.. (2018). Effect of the degree of plastic deformation on the thermal electromotive force of Cu-X5crni1810 steel thermocouple. in Science of Sintering
International Institute for the Science of Sintering., 50(4), 421-432.
https://doi.org/10.2298/SOS1804421M
Milićević I, Spasojević M, Slavković R, Spasojević M, Maričić A. Effect of the degree of plastic deformation on the thermal electromotive force of Cu-X5crni1810 steel thermocouple. in Science of Sintering. 2018;50(4):421-432.
doi:10.2298/SOS1804421M .
Milićević, Ivan, Spasojević, Milica, Slavković, Radomir, Spasojević, Miroslav
, Maričić, Aleksa, "Effect of the degree of plastic deformation on the thermal electromotive force of Cu-X5crni1810 steel thermocouple" in Science of Sintering, 50, no. 4 (2018):421-432,
https://doi.org/10.2298/SOS1804421M . .
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Amorphous-Crystalline Ni-Fe Powder Mixture: Hydrogenation and Annealing Effects on Microstructure and Electrical and Magnetic Properties

Milinčić, Radovan; Spasojević, Miroslav; Spasojević, Milica; Maričić, Aleksa; Randjic, Sinisa

(Int Inst Science Sintering (I I S S), Belgrade, 2016)

TY  - JOUR
AU  - Milinčić, Radovan
AU  - Spasojević, Miroslav
AU  - Spasojević, Milica
AU  - Maričić, Aleksa
AU  - Randjic, Sinisa
PY  - 2016
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/2396
AB  - The hydrogenation of a crystalline Ni-Fe (80 wt.% Ni, 20 wt.% Fe) powder mixture leads to the formation of a mixture of Face Centered Cubic (FCC)-Ni and FCC-Fe phase nanocrystals embedded in an amorphous matrix. The magnetic susceptibility of the nanostructured powder is 2.1 times higher than that of the as-produced crystalline mixture. Heating in the temperature range 420-590 K causes structural relaxation in the hydrogenated powder, resulting in an increase of the magnetic susceptibility and a decrease of the electrical resistivity. During the heating procedure, the reorientation of magnetic domains in nickel and iron takes place in the temperature range 580-650 K and 790-850 K, respectively. In the pressed sample from the powder mixture, the crystallization of the amorphous phase of nickel and its FCC lattice crystalline grain growth occurs in the temperature range 620-873 K causing a decrease in the magnetic susceptibility of the nickel FCC phase and a sudden drop in the electrical resistivity. Prolonged heating of the mixed powders at 873K results in the formation of a Ni-Fe solid solution with higher magnetic susceptibility than the starting mixture.
PB  - Int Inst Science Sintering (I I S S), Belgrade
T2  - Science of Sintering
T1  - Amorphous-Crystalline Ni-Fe Powder Mixture: Hydrogenation and Annealing Effects on Microstructure and Electrical and Magnetic Properties
VL  - 48
IS  - 3
SP  - 343
EP  - 351
DO  - 10.2298/SOS1603343M
ER  - 
@article{
author = "Milinčić, Radovan and Spasojević, Miroslav and Spasojević, Milica and Maričić, Aleksa and Randjic, Sinisa",
year = "2016",
abstract = "The hydrogenation of a crystalline Ni-Fe (80 wt.% Ni, 20 wt.% Fe) powder mixture leads to the formation of a mixture of Face Centered Cubic (FCC)-Ni and FCC-Fe phase nanocrystals embedded in an amorphous matrix. The magnetic susceptibility of the nanostructured powder is 2.1 times higher than that of the as-produced crystalline mixture. Heating in the temperature range 420-590 K causes structural relaxation in the hydrogenated powder, resulting in an increase of the magnetic susceptibility and a decrease of the electrical resistivity. During the heating procedure, the reorientation of magnetic domains in nickel and iron takes place in the temperature range 580-650 K and 790-850 K, respectively. In the pressed sample from the powder mixture, the crystallization of the amorphous phase of nickel and its FCC lattice crystalline grain growth occurs in the temperature range 620-873 K causing a decrease in the magnetic susceptibility of the nickel FCC phase and a sudden drop in the electrical resistivity. Prolonged heating of the mixed powders at 873K results in the formation of a Ni-Fe solid solution with higher magnetic susceptibility than the starting mixture.",
publisher = "Int Inst Science Sintering (I I S S), Belgrade",
journal = "Science of Sintering",
title = "Amorphous-Crystalline Ni-Fe Powder Mixture: Hydrogenation and Annealing Effects on Microstructure and Electrical and Magnetic Properties",
volume = "48",
number = "3",
pages = "343-351",
doi = "10.2298/SOS1603343M"
}
Milinčić, R., Spasojević, M., Spasojević, M., Maričić, A.,& Randjic, S.. (2016). Amorphous-Crystalline Ni-Fe Powder Mixture: Hydrogenation and Annealing Effects on Microstructure and Electrical and Magnetic Properties. in Science of Sintering
Int Inst Science Sintering (I I S S), Belgrade., 48(3), 343-351.
https://doi.org/10.2298/SOS1603343M
Milinčić R, Spasojević M, Spasojević M, Maričić A, Randjic S. Amorphous-Crystalline Ni-Fe Powder Mixture: Hydrogenation and Annealing Effects on Microstructure and Electrical and Magnetic Properties. in Science of Sintering. 2016;48(3):343-351.
doi:10.2298/SOS1603343M .
Milinčić, Radovan, Spasojević, Miroslav, Spasojević, Milica, Maričić, Aleksa, Randjic, Sinisa, "Amorphous-Crystalline Ni-Fe Powder Mixture: Hydrogenation and Annealing Effects on Microstructure and Electrical and Magnetic Properties" in Science of Sintering, 48, no. 3 (2016):343-351,
https://doi.org/10.2298/SOS1603343M . .
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