Showing papers by "Vesna Vasić published in 2012"
TL;DR: Among all extracts, the antioxidant capacity of 50% ethanol aqueous extract was the highest, both when measured using the DPPH test, and when using CV, and gentiopicroside has proved to be the strongest inhibitor of MPO, with IC(50)=0.8 μg/ml.
56 citations
TL;DR: The kinetics of J-aggregate assembly on thesurface of noble metal nanoparticle colloids are described, providing new mechanistic insight into the interaction of the dye molecules with the surface of metal nanoparticles.
Abstract: The kinetics of J-aggregate assembly on the surface of noble metal nanoparticle colloids are described, providing new mechanistic insight into the interaction of the dye molecules with the surface of metal nanoparticles. We specifically studied the J-aggregation of a thiacyanine dye (TC, 3,3′-disulfopropyl-5,5′-dichlorothiacyanine sodium salt) on the surface of gold nanoparticle colloids. The hybrid J-aggregate–Au colloidal dispersions were characterized by UV–vis spectrophotometry, fluorescence measurements, zeta potential measurements, and TEM analysis. Kinetic measurements were carried out using a stopped-flow method, indicating that the J-aggregate formation on the surface occurs via a two-step process. The first step includes adsorption of the initial dye layer, followed by an order of magnitude slower growth of consecutive layers. Activation parameters determined from the fluorescence measurements yielded further details about the nature of the interaction.
37 citations
TL;DR: In this article, the authors used anodically evolved Cl 2, Br 2 or I 2 as a pre-step for their detection via UPLC analysis, as well as its stability with respect to hydrolysis.
19 citations