20.500.12556/RUL-131182 A kinetic approach in the evaluation of radical-scavenging efficiency of sinapic acid and its derivatives A kinetic approach was used to determine the radical scavenging activities of sinapic acid and its derivatives: sinapine, 4-vinylsyringol, syringic acid, syringaldehyde, and ethyl, propyl and butyl sinapate. The responses were expressed as rates of 2,2-diphenyl-1-picrylhydrazyl radical (DPPH$^·$) scavenging (R$_S$), superoxide radical (O$_2$$^{·−}$) scavenging (R$_{FF}$), and β-carotene bleaching in the emulsion system (R$_B$). For R$_S$ and R$_B$, the esters of sinapic acid showed the highest responses while, for R$_{FF}$, this was seen for syringic acid. The effectiveness of the selected compounds for scavenging these free radicals was also determined at a fixed endpoint. The early response parameters were demonstrated to be good discriminators in assessing differences for antioxidants with comparable fixed endpoint activity. The primary feature that ranks the kinetic data and the endpoint determinations is interpreted in terms of the mechanisms of the reactions involved in each of the assays conducted. sinapic acid antioxidant activity radical scavenging kinetics radical scavenging mechanisms organske kisline fenolne kisline sinapinske kisline sinapin antioksidativna učinkovitost DPPH lovilci prostih radikalov true false true Angleški jezik Slovenski jezik Članek v reviji 2021-09-23 09:56:26 2021-09-23 09:56:27 2022-09-10 04:10:28 0000-00-00 00:00:00 2017 0 0 17 str. iss. 3, art. 375 Vol. 22 2017 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 577.1:547.587.53 1420-3049 10.3390/molecules22030375 4761720 RAZ_Martinovic_Neda_2017.pdf RAZ_Martinovic_Neda_2017.pdf 1 ADCA0B11BDF2B937AE2F7090563F9475 effe7b8cd4727d1fe80b360489d3dfdc2d3b59742fe644e95a221cfa0aed6ecd cc09674d-1c43-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=148449 http://www.mdpi.com/1420-3049/22/3/375 1 7bf69147-1c43-11ec-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=148448 Biotehniška fakulteta 0 0 0