Zheljazkov, Valtcho D.

Link to this page

Authority KeyName Variants
orcid::0000-0002-3479-9653
  • Zheljazkov, Valtcho D. (3)
Projects

Author's Bibliography

Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods

Aćimović, Milica G.; Šovljanski, Olja; Pezo, Lato; Travičić, Vanja; Tomić, Ana; Zheljazkov, Valtcho D.; Ćetković, Gordana; Švarc-Gajić, Jaroslava; Brezo-Borjan, Tanja; Sofrenić, Ivana

(MDPI, 2022)

TY  - JOUR
AU  - Aćimović, Milica G.
AU  - Šovljanski, Olja
AU  - Pezo, Lato
AU  - Travičić, Vanja
AU  - Tomić, Ana
AU  - Zheljazkov, Valtcho D.
AU  - Ćetković, Gordana
AU  - Švarc-Gajić, Jaroslava
AU  - Brezo-Borjan, Tanja
AU  - Sofrenić, Ivana
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5656
AB  - Winter savory (Satureja montana L.) is a well-known spice and medicinal plant with a wide range of activities and applications. Two subspecies of S. montana, subsp. montana and subsp. variegata, were used for the preparation of seven different extracts: steam distillation (essential oil (EO) and hydrolate (HY)), subcritical water (SWE), ultrasound-assisted (UAE-MeOH and UAE-H2O), and microwave-assisted (MAE-MeOH and MAE-H2O) extraction. The obtained EOs, HYs, and extracts were used for an in vitro evaluation of the antioxidant activity (DPPH, ABTS, reducing power, and superoxide anion methods) and in vitro antimicrobial activity against Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Salmonella Typhimurium, Saccharomyces cerevisiae, and Candida albicans. The antimicrobial screening was conducted using disk-diffusion assessment, minimal inhibitory concentration, time–kill kinetics modeling, and pharmacodynamic study of the biocide effect. The total phenolic content (TPC) was highest in EO, followed by SWE, MAE, and UAE, and the lowest was in HY. The highest antimicrobial activity shows EO and SWE for both varieties, while different UAE and MAE extracts have not exhibited antimicrobial activity. The natural antimicrobials in the S. montana extract samples obtained by green extraction methods, indicated the possibility of ecologically and economically better solutions for future in vivo application of the selected plant subspecies.
PB  - MDPI
T2  - Antibiotics
T1  - Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods
VL  - 11
SP  - 1235
DO  - 10.3390/antibiotics11091235
ER  - 
@article{
author = "Aćimović, Milica G. and Šovljanski, Olja and Pezo, Lato and Travičić, Vanja and Tomić, Ana and Zheljazkov, Valtcho D. and Ćetković, Gordana and Švarc-Gajić, Jaroslava and Brezo-Borjan, Tanja and Sofrenić, Ivana",
year = "2022",
abstract = "Winter savory (Satureja montana L.) is a well-known spice and medicinal plant with a wide range of activities and applications. Two subspecies of S. montana, subsp. montana and subsp. variegata, were used for the preparation of seven different extracts: steam distillation (essential oil (EO) and hydrolate (HY)), subcritical water (SWE), ultrasound-assisted (UAE-MeOH and UAE-H2O), and microwave-assisted (MAE-MeOH and MAE-H2O) extraction. The obtained EOs, HYs, and extracts were used for an in vitro evaluation of the antioxidant activity (DPPH, ABTS, reducing power, and superoxide anion methods) and in vitro antimicrobial activity against Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Salmonella Typhimurium, Saccharomyces cerevisiae, and Candida albicans. The antimicrobial screening was conducted using disk-diffusion assessment, minimal inhibitory concentration, time–kill kinetics modeling, and pharmacodynamic study of the biocide effect. The total phenolic content (TPC) was highest in EO, followed by SWE, MAE, and UAE, and the lowest was in HY. The highest antimicrobial activity shows EO and SWE for both varieties, while different UAE and MAE extracts have not exhibited antimicrobial activity. The natural antimicrobials in the S. montana extract samples obtained by green extraction methods, indicated the possibility of ecologically and economically better solutions for future in vivo application of the selected plant subspecies.",
publisher = "MDPI",
journal = "Antibiotics",
title = "Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods",
volume = "11",
pages = "1235",
doi = "10.3390/antibiotics11091235"
}
Aćimović, M. G., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics
MDPI., 11, 1235.
https://doi.org/10.3390/antibiotics11091235
Aćimović MG, Šovljanski O, Pezo L, Travičić V, Tomić A, Zheljazkov VD, Ćetković G, Švarc-Gajić J, Brezo-Borjan T, Sofrenić I. Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics. 2022;11:1235.
doi:10.3390/antibiotics11091235 .
Aćimović, Milica G., Šovljanski, Olja, Pezo, Lato, Travičić, Vanja, Tomić, Ana, Zheljazkov, Valtcho D., Ćetković, Gordana, Švarc-Gajić, Jaroslava, Brezo-Borjan, Tanja, Sofrenić, Ivana, "Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods" in Antibiotics, 11 (2022):1235,
https://doi.org/10.3390/antibiotics11091235 . .
1
12
10
7

Supplementary material for: Aćimović, M., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics MDPI., 11, 1235. https://doi.org/10.3390/antibiotics11091235

Aćimović, Milica G.; Šovljanski, Olja; Pezo, Lato; Travičić, Vanja; Tomić, Ana; Zheljazkov, Valtcho D.; Ćetković, Gordana; Švarc-Gajić, Jaroslava; Brezo-Borjan, Tanja; Sofrenić, Ivana

(MDPI, 2022)

TY  - DATA
AU  - Aćimović, Milica G.
AU  - Šovljanski, Olja
AU  - Pezo, Lato
AU  - Travičić, Vanja
AU  - Tomić, Ana
AU  - Zheljazkov, Valtcho D.
AU  - Ćetković, Gordana
AU  - Švarc-Gajić, Jaroslava
AU  - Brezo-Borjan, Tanja
AU  - Sofrenić, Ivana
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5661
AB  - Winter savory (Satureja montana L.) is a well-known spice and medicinal plant with a wide range of activities and applications. Two subspecies of S. montana, subsp. montana and subsp. variegata, were used for the preparation of seven different extracts: steam distillation (essential oil (EO) and hydrolate (HY)), subcritical water (SWE), ultrasound-assisted (UAE-MeOH and UAE-H2O), and microwave-assisted (MAE-MeOH and MAE-H2O) extraction. The obtained EOs, HYs, and extracts were used for an in vitro evaluation of the antioxidant activity (DPPH, ABTS, reducing power, and superoxide anion methods) and in vitro antimicrobial activity against Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Salmonella Typhimurium, Saccharomyces cerevisiae, and Candida albicans. The antimicrobial screening was conducted using disk-diffusion assessment, minimal inhibitory concentration, time–kill kinetics modeling, and pharmacodynamic study of the biocide effect. The total phenolic content (TPC) was highest in EO, followed by SWE, MAE, and UAE, and the lowest was in HY. The highest antimicrobial activity shows EO and SWE for both varieties, while different UAE and MAE extracts have not exhibited antimicrobial activity. The natural antimicrobials in the S. montana extract samples obtained by green extraction methods, indicated the possibility of ecologically and economically better solutions for future in vivo application of the selected plant subspecies.
PB  - MDPI
T2  - Antibiotics
T1  - Supplementary material for: Aćimović, M., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics MDPI., 11, 1235. https://doi.org/10.3390/antibiotics11091235
VL  - 11
SP  - 1235
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5661
ER  - 
@misc{
author = "Aćimović, Milica G. and Šovljanski, Olja and Pezo, Lato and Travičić, Vanja and Tomić, Ana and Zheljazkov, Valtcho D. and Ćetković, Gordana and Švarc-Gajić, Jaroslava and Brezo-Borjan, Tanja and Sofrenić, Ivana",
year = "2022",
abstract = "Winter savory (Satureja montana L.) is a well-known spice and medicinal plant with a wide range of activities and applications. Two subspecies of S. montana, subsp. montana and subsp. variegata, were used for the preparation of seven different extracts: steam distillation (essential oil (EO) and hydrolate (HY)), subcritical water (SWE), ultrasound-assisted (UAE-MeOH and UAE-H2O), and microwave-assisted (MAE-MeOH and MAE-H2O) extraction. The obtained EOs, HYs, and extracts were used for an in vitro evaluation of the antioxidant activity (DPPH, ABTS, reducing power, and superoxide anion methods) and in vitro antimicrobial activity against Bacillus cereus, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Salmonella Typhimurium, Saccharomyces cerevisiae, and Candida albicans. The antimicrobial screening was conducted using disk-diffusion assessment, minimal inhibitory concentration, time–kill kinetics modeling, and pharmacodynamic study of the biocide effect. The total phenolic content (TPC) was highest in EO, followed by SWE, MAE, and UAE, and the lowest was in HY. The highest antimicrobial activity shows EO and SWE for both varieties, while different UAE and MAE extracts have not exhibited antimicrobial activity. The natural antimicrobials in the S. montana extract samples obtained by green extraction methods, indicated the possibility of ecologically and economically better solutions for future in vivo application of the selected plant subspecies.",
publisher = "MDPI",
journal = "Antibiotics",
title = "Supplementary material for: Aćimović, M., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics MDPI., 11, 1235. https://doi.org/10.3390/antibiotics11091235",
volume = "11",
pages = "1235",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5661"
}
Aćimović, M. G., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Supplementary material for: Aćimović, M., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics MDPI., 11, 1235. https://doi.org/10.3390/antibiotics11091235. in Antibiotics
MDPI., 11, 1235.
https://hdl.handle.net/21.15107/rcub_cherry_5661
Aćimović MG, Šovljanski O, Pezo L, Travičić V, Tomić A, Zheljazkov VD, Ćetković G, Švarc-Gajić J, Brezo-Borjan T, Sofrenić I. Supplementary material for: Aćimović, M., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics MDPI., 11, 1235. https://doi.org/10.3390/antibiotics11091235. in Antibiotics. 2022;11:1235.
https://hdl.handle.net/21.15107/rcub_cherry_5661 .
Aćimović, Milica G., Šovljanski, Olja, Pezo, Lato, Travičić, Vanja, Tomić, Ana, Zheljazkov, Valtcho D., Ćetković, Gordana, Švarc-Gajić, Jaroslava, Brezo-Borjan, Tanja, Sofrenić, Ivana, "Supplementary material for: Aćimović, M., Šovljanski, O., Pezo, L., Travičić, V., Tomić, A., Zheljazkov, V. D., Ćetković, G., Švarc-Gajić, J., Brezo-Borjan, T.,& Sofrenić, I.. (2022). Variability in Biological Activities of Satureja montana Subsp. montana and Subsp. variegata Based on Different Extraction Methods. in Antibiotics MDPI., 11, 1235. https://doi.org/10.3390/antibiotics11091235" in Antibiotics, 11 (2022):1235,
https://hdl.handle.net/21.15107/rcub_cherry_5661 .

Helichrysum italicum (Roth) G. Don Essential Oil from Serbia: Chemical Composition, Classification and Biological Activity—May It Be a Suitable New Crop for Serbia?

Aćimović, Milica G.; Ljujić, Jovana; Vulić, Jelena; Zheljazkov, Valtcho D.; Pezo, Lato; Varga, Ana; Tumbas Šaponjac, Vesna

(MDPI, 2021)

TY  - JOUR
AU  - Aćimović, Milica G.
AU  - Ljujić, Jovana
AU  - Vulić, Jelena
AU  - Zheljazkov, Valtcho D.
AU  - Pezo, Lato
AU  - Varga, Ana
AU  - Tumbas Šaponjac, Vesna
PY  - 2021
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/4609
AB  - H. italicum essential oil (EO) is one of the most popular ingredients utilized by the cosmetic industry, and it is also used as natural antioxidant and as a value-added ingredient in food products. The chemical composition of the EO H. italicum cultivated in Serbia was analyzed by gas chromatography–mass spectrometry. The quantitative structure–retention relationship was used to predict the retention indices of the EO constituents acquired by GC-MS data, applying five molecular descriptors selected by factor analysis and a genetic algorithm. Also, antimicrobial activity, and biological activity by four common antioxidant tests (DPPH and ABTS assays, reducing power, and β-carotene bleaching test), and in vitro antihyperglycemic and anti-inflammatory capacities were evaluated. A total of 70 EO constituents were detected, of which 17 (8.5%) could not be identified. The H. italicum EO in this study belonged to γ-curcumene chemotype. The coefficients of determination reached the value of 0.964, demonstrating that this model could be used for prediction purposes. All applied tests showed that H. italicum EO possesses good biological activity and an interesting chemical composition. Therefore, the EO of H. italicum grown in Serbia has a potential to be used in food, cosmetic, and pharmaceutical products.
PB  - MDPI
T2  - Agronomy
T2  - Agronomy
T1  - Helichrysum italicum (Roth) G. Don Essential Oil from Serbia: Chemical Composition, Classification and Biological Activity—May It Be a Suitable New Crop for Serbia?
VL  - 11
IS  - 7
SP  - 1282
DO  - 10.3390/agronomy11071282
ER  - 
@article{
author = "Aćimović, Milica G. and Ljujić, Jovana and Vulić, Jelena and Zheljazkov, Valtcho D. and Pezo, Lato and Varga, Ana and Tumbas Šaponjac, Vesna",
year = "2021",
abstract = "H. italicum essential oil (EO) is one of the most popular ingredients utilized by the cosmetic industry, and it is also used as natural antioxidant and as a value-added ingredient in food products. The chemical composition of the EO H. italicum cultivated in Serbia was analyzed by gas chromatography–mass spectrometry. The quantitative structure–retention relationship was used to predict the retention indices of the EO constituents acquired by GC-MS data, applying five molecular descriptors selected by factor analysis and a genetic algorithm. Also, antimicrobial activity, and biological activity by four common antioxidant tests (DPPH and ABTS assays, reducing power, and β-carotene bleaching test), and in vitro antihyperglycemic and anti-inflammatory capacities were evaluated. A total of 70 EO constituents were detected, of which 17 (8.5%) could not be identified. The H. italicum EO in this study belonged to γ-curcumene chemotype. The coefficients of determination reached the value of 0.964, demonstrating that this model could be used for prediction purposes. All applied tests showed that H. italicum EO possesses good biological activity and an interesting chemical composition. Therefore, the EO of H. italicum grown in Serbia has a potential to be used in food, cosmetic, and pharmaceutical products.",
publisher = "MDPI",
journal = "Agronomy, Agronomy",
title = "Helichrysum italicum (Roth) G. Don Essential Oil from Serbia: Chemical Composition, Classification and Biological Activity—May It Be a Suitable New Crop for Serbia?",
volume = "11",
number = "7",
pages = "1282",
doi = "10.3390/agronomy11071282"
}
Aćimović, M. G., Ljujić, J., Vulić, J., Zheljazkov, V. D., Pezo, L., Varga, A.,& Tumbas Šaponjac, V.. (2021). Helichrysum italicum (Roth) G. Don Essential Oil from Serbia: Chemical Composition, Classification and Biological Activity—May It Be a Suitable New Crop for Serbia?. in Agronomy
MDPI., 11(7), 1282.
https://doi.org/10.3390/agronomy11071282
Aćimović MG, Ljujić J, Vulić J, Zheljazkov VD, Pezo L, Varga A, Tumbas Šaponjac V. Helichrysum italicum (Roth) G. Don Essential Oil from Serbia: Chemical Composition, Classification and Biological Activity—May It Be a Suitable New Crop for Serbia?. in Agronomy. 2021;11(7):1282.
doi:10.3390/agronomy11071282 .
Aćimović, Milica G., Ljujić, Jovana, Vulić, Jelena, Zheljazkov, Valtcho D., Pezo, Lato, Varga, Ana, Tumbas Šaponjac, Vesna, "Helichrysum italicum (Roth) G. Don Essential Oil from Serbia: Chemical Composition, Classification and Biological Activity—May It Be a Suitable New Crop for Serbia?" in Agronomy, 11, no. 7 (2021):1282,
https://doi.org/10.3390/agronomy11071282 . .
1
27
6
23
21