Претраживање
Приказ резултата 1-10 од 106
Four-tier tests a means for the assessment of conceptual understanding of chemistry content / Четворослојни тестови као начин проверe концептуалног разумевањa садржаја хемије
(University of Belgrade, Teacher Education Faculty, 2022)
Једна од честих дилема наставника хемије односи се на одабир
најефикаснијег начина за проверу ученичког концептуалног разумевања
обрађеног градива и детекцију мисконцепција, као озбиљних препрека за
даље учење. Циљ овог ...
Analysis of PET degrading enzymes by bioinfomatic tools
(European federation of biotechnologyAsian federation of biotechnology, 2023)
PET hydrolases are enzymes that have been shown to act upon PET as a substrate. These
enzymes usually adopt an α/β hydrolase fold and are from the classes of esterases, lipases,
cutinases, and hydrolases.
Here, we have ...
Three-tier tests as an effective tool for the assessment of understanding the chemistry content during the Covid-19 pandemic / Трослојни тестови као ефективно средство за проверу разумевања садржаја хемије током пандемије Covid-19
(Belgrade : University of Belgrade, Teacher Education Faculty, 2023)
During the COVID-19 pandemic, when direct contact with pupils was
time-limited, one of the biggest challenges of chemistry teachers referred to the
choice of the most effective way to assess pupils’ understanding of the ...
Solubility prediction of the PET hydrolyzing enzyme’s double mutants for production in Escherichia coli
(University of Belgrade - Faculty of Geography, 2023)
Polyethylene terephthalate (PET) is a widely used plastic material. Due to its convenient physicochemical properties, it has become irreplaceable in many scientific, industrial, medical and everyday uses, leading to an ...
Preliminary Investigation of Origin of Polycyclic Aromatic Hydrocarbons in Select Street Dust Samples, Pančevo, Serbia
(Belgrade : Serbian Chemical Society, 2021)
Figure 1. Representative GC-MS chromatograms showing distribution of all PAHs analyzed in this study. The aim of this study was to investigate the origin of polycyclic aromatic hydrocarbons (PAH) in street dust samples ...
Preliminary Investigation of Origin of Aliphatic Compounds in Street Dust Samples, Pančevo, Serbia
(Belgrade : Serbian Chemical Society, 2021)
The aim of this study was analysis of the origin of the aliphatic compounds in selected street dust samples. The samples were collected in the city of Pančevo, Serbia, within residential areas in close vicinity to heavy ...
Influence of solvothermal synthesis parameters on NaY0.65Gd0.15F4:Yb0.18Er0.02 UCNPs structural, morphological and optical characteristics
(Belgrade : Serbian Ceramic Society, 2021)
Monosized Up-Converting NanoParticles (UCNPs) with biocompatible surface and unique optical properties attract a great interest as new cell markers or drug delivery systems. The uppermost UC efficiency of β-NaYF4:Yb/Er ...
Effect of processing parameters on NaGdYF4:Yb,Er UCNPs structural, morphological and optical properties
(Belgrade : Institute of Technical Sciences of SASA, 2021)
Synthesis of monosized and spherical Up-Converting NanoParticles (UCNPs) with biocompatible surface are of a great interest because of their potential application in biomedicine as biomarkers or drug delivery systems. Among ...
Influence of different synthesis methods on morphological and optical properties of the rare earth doped fluorides
(Belgrade : Materials Research Society of Serbia, 2022)
Over the last few years there has been a great interest in developing the efficient methodologies for the preparation of rare earth doped up-converting nanoparticles (UCNPs), which exhibit emission in visible part of spectra ...
Sonochemical synthesis of up-converting β-NaYF4: Yb, Er nanoparticles
(Belgrade : Materials Research Society of Serbia, 2021)
Up-converting nanoparticles (UCNPs) with unique ability to convert NIR to VIS light (anti-Stokes process) have a wide application in optoelectronics, forensic, security labeling and biomedicine. Over the past few years ...