Dietry flavonoids(Poly phenols) are important phytonutrient component widely distributed in plant foods , flavonoids have beneficial biological activities,such as antioxidant activity can chelate with metal ions the interaction of lead(׀׀) ion a poly hydroxylated flavonoids, quercetin molecule,were investigated electrochemically acidic media .The Differential Puls Polarographic Techanique was u...

This study assessed the influence of blanching and frying heating rate/time on antioxidant capacity (poly)phenols cardoon stalks ( Cynara cardunculus L. var. altilis DC). Blanching (98 °C, 30 s) increased total native chlorogenic acids content (1.2-fold vs raw cardoon), with no significant changes in DPPH capacity, but a decrease ABTS (0.6-fold). Specifically, di-caffeoylquinic (CQAs) increase ...

−Various substituted phenols and phenylenediamines were enzymatically polymerized by horseradish peroxidase in 80% (v/v) organic solvents-aqueous buffer (100 mM sodium acetate, pH 5) mixtures with H2O2 as the oxidant. The thermal stability of the polymers was investigated by thermogravimetric analysis (TGA) and represented by the char yield (wt% of the initial polymer mass) after being heated a...

A soluble enzyme system which catalyzes the aerobic oxidation of reduced pyridine nucleotides in wheat germ has previously been described (1). Peroxidase was shown to be a component of this system. Later, Humphreys (2) demonstrated that Mn+ and an unidentified cofactor were required for aerobic oxidation of TPNH’ in crude preparations of malic enzyme from wheat germ. Although no attempt was mad...

Mol. Nutr. Food Res. 2022, 66, 2200617 DOI: 10.1002/mnfr.202200617 (Poly)phenols are widespread in plant-based foods. Their effects on human health pleiotropic but our knowledge their metabolism and bioactivity is limited. Exploring new experimental approaches key better understand them. A brief introduction to all the articles this special issue provided by Pedro Mena Alan Crozier, guest-edito...

BACKGROUND KCa3.1 channels are calcium/calmodulin-regulated voltage-independent K(+) channels that produce membrane hyperpolarization and shape Ca(2+)-signaling and thereby physiological functions in epithelia, blood vessels, and white and red blood cells. Up-regulation of KCa3.1 is evident in fibrotic and inflamed tissues and some tumors rendering the channel a potential drug target. In the pr...

para-Selective processes for the chlorination of phenols using sulphuryl chloride in presence various sulphur-containing catalysts have been successfully developed. Several chlorinated phenols, especially those derived by para-chlorination phenol, ortho-cresol, meta-cresol, and meta-xylenol, are significant commercial importance, but reactions such not always as regioselective would be desirabl...