Results 121 to 130 of about 2,582,760 (149)

Dietary Phenolic Acids and Derivatives. Evaluation of the Antioxidant Activity of Sinapic Acid and Its Alkyl Esters

Journal of Agricultural and Food Chemistry, 2010
The action of sinapic acid and its alkyl esters as potential antioxidants has been investigated. For this purpose, a series of sinapic acid ester derivatives was synthesized and their antioxidant activities were evaluated using distinctive analytical methods, namely, 2,2-diphenyl-1-picrylhydrazyl (DPPH) and FRAP UV-vis methods and differential scanning
Jorge Garrido, E Manuela Garrido, Omidreza Firuzi   +2 more
exaly   +5 more sources

Synthesis and Evaluation of Antioxidant Activities of Novel Hydroxyalkyl Esters and Bis-Aryl Esters Based on Sinapic and Caffeic Acids

Journal of Agricultural and Food Chemistry, 2020
Novel hydroxyalkyl esters and bis-aryl esters were synthesized from sinapic and caffeic acids and aliphatic α,ω-diols of increasing chain lengths from 2 to 12 carbon atoms. Then, their antiradical reactivity (DPPH assay) and their antioxidant activity in a model oil-in-water emulsion (CAT assay) were evaluated.
Jérôme Lecomte, Erwann Durand, Pierre Villeneuve   +2 more
exaly   +7 more sources

Sinapic and ferulic acid phenethyl esters increase the expression of steroidogenic genes in MA-10 tumor Leydig cells

Toxicology in Vitro, 2023
During aging, the production of androgens by the testis Leydig cells gradually decreases. Phenolic compounds can improve testosterone biosynthesis and delay the onset of hypogonadal symptoms in males. In this study, sinapic acid phenethyl ester was evaluated for its ability to regulate gene expression and steroid production in Leydig cells ...
Luc J Martin, Mohamed Touaïbia
exaly   +4 more sources

Antioxidative effects of alkyl esters of sinapic acid on flaxseed oil and its fatty acid methyl esters

JAOCS, Journal of the American Oil Chemists' Society
AbstractAlkyl esters of sinapic acid were enzymatically synthesized by using hexanol CH3(CH2)5OH and palmitoyl chloride CH3(CH2)14COCl as acyl donors. The lipid oxidation retarding activities of these conjugates were determined using different methods in two lipid media; bulk flaxseed oil and its fatty acid methyl esters (FAME). Palmitoyl sinapate more
Tomaz Polak, Nataša Poklar Ulrih, Derya Arslan   +2 more
exaly   +3 more sources

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Sinapic acid esters from Polygala virgata

Phytochemistry, 1993
Three sinapoyl glycosides have been isolated from the roots of Polygala virgata. The structures were established on the basis of UV, mass 1H and 13C NMR spectral data, including homonuclear and heteronuclear 2D shift correlation and selective INEPT experiments.
Matthias Hamburger, Jérôme D Msonthi
exaly   +4 more sources

Effect of sinapic acid ester derivatives on the oxidative stability of omega-3 fatty acids rich oil-in-water emulsions

Food Chemistry, 2020
Oil-in-water (O/W) emulsions are important delivery systems of omega-3 fatty acids (n-3 FA). We investigated the effect of sinapic acid esters concentration and chain length, the electrical charge of the emulsifier and emulsion pH on the oxidative stability of n-3 FA rich O/W emulsions. Echium oil was applied as n-3 FA source. A 24 factorial design was
da Silveira, Tayse Ferreira Ferreira, Cajaíba, Letícia Maeda, Valentin, Leonardo, Barea, Bruno, Villeneuve, Pierre, Castro, Inar Alves   +5 more
openaire   +4 more sources

Sinapic acid esters and a phenolic glycoside from Cynanchum hancockianum

Phytochemistry, 1993
Abstract Two sinapic acid conjugates and one phenolic glycoside were isolated from the roots of Cynanchum hancockianum . From spectroscopic evidence, the structures were characterized as 6- O -[ E ]-sinapoyl-(α- and β)- d -glucopyranoside, β- d -fructofuranosyl-α- d -(6- O -[ E ]-sinapoylglucopyranoside) and 2-acetylphenol-1-β- d -gluco- pyranosyl ...
Hongxiang Lou, Xian Li, Tingru Zhu, Wen Li   +3 more
exaly   +2 more sources

Preparation and properties of multifunctional sinapic acid corn bran arabinoxylan esters

International Journal of Biological Macromolecules, 2018
In the present study, corn bran arabinoxylan (CAX) were modified with sinapic acid (SA) by esterification to generate sinapic acid corn bran arabinoxylan esters (SA-CAX) with various substituted degrees. The structure of SA-CAX was characterized by FT-IR, NMR and UV spectroscopy. And the antioxidant activities of SA-CAX were evaluated by scavenging the
Cheng Yang, Rong Liang, Tong He
exaly   +3 more sources

Sinapic acid ester fluctuations in cotyledons of Raphanus sativus

Zeitschrift Für Pflanzenphysiologie, 1977
Summary During germination of Raphanus sativus there is a wide fluctuation of soluble sinapic acid esters. 2 major constituents are rapidly degraded in the imbibition phase, and during cotyledon growth new soluble sinapic acid esters appear, from which 3 major components exhibit considerable quantitative changes in opposing directions.
exaly   +2 more sources

Determination of the Phytic Acid and Sinapic Acid Esters in Seeds of Rapeseed and Selection of Genotypes with Reduced Concentrations of these Compounds

Lipid - Fett, 1991
AbstractA photometric procedure is described which allows the fast determination of the concentrations of sinapic acid esters and phytic acid in seeds of rape. The method is based on the yellow colour of the esters in alkaline media and the weakening of the intensity of the red coloured Fe‐sulfosalicylic acid complex in the presence of phytic acid.
exaly   +2 more sources