Neda Martinović (Author), Tomaž Polak (Author), Damjan Makuc (Author), Nataša Poklar Ulrih (Author), Helena Abramovič (Author)

Abstract

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.

Keywords

organske kisline;fenolne kisline;sinapinske kisline;sinapin;antioksidativna učinkovitost;DPPH;lovilci prostih radikalov;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 577.1:547.587.53
COBISS: 4761720 Link will open in a new window
ISSN: 1420-3049
Views: 181
Downloads: 60
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: organske kisline;fenolne kisline;sinapinske kisline;sinapin;antioksidativna učinkovitost;DPPH;lovilci prostih radikalov;
Type (COBISS): Article
Pages: f. 1-17, 375
Volume: ǂVol. ǂ22
Issue: ǂiss. ǂ3
Chronology: 2017
DOI: 10.3390/molecules22030375
ID: 13534219