Background: Phenolic plant extracts are added as antioxidants in meat to prevent lipid oxidation, but depending on the concentration applied, may affect proteins either through covalent interactions or by serving as a prooxidant. Methods: Brine-injected pork chops prepared with green tea extract (25-160 ppm gallic acid equivalents (GAE)), or maté extract (25-160 ppm GAE) and stored (5 °C, 7 day...

Discoloration of dark-fleshed fish species during storage and processing was mainly due to the reaction of myoglobin, a monomeric globular heme protein contributed to the pigmentation of red meat fish, alone and with other muscle components. Metmyoglobin formation caused by the autooxidation of myoglobin was a major factor influencing the darkening of dark-fleshed fish meat during iced and froz...

A mild, efficient and fast method for the oxidation of alcohols and trimethylsilyl, tetrahydropyranyl and methoxymethyl ethers to their corresponding carbonyl compounds using CrO3 in the presence of rice husk ash (RHA) is reported. All reactions were performed at room temperature in high to excellent yields. A new, efficient and green catalyst, heterogeneous reaction conditions, easy work-up of...

The redox properties of model chromophores from the green fluorescent protein family are characterized computationally using density functional theory with a long-range corrected functional, the equation-of-motion coupled-cluster method, and implicit solvation models. The analysis of electron-donating abilities of the chromophores reveals an intricate interplay between the size of the chromopho...

A recently proposed 2',7'-dichlorofluorescein (DCF)-derived fluorescent probe for the detection of ozone shows good selectivity against a number of reactive oxygen species and good pH stability for biological and environmental applications. It is found, however, that over oxidation of the fluorescent product (Pittsburgh green) can occur. This could render quantitative measurements inaccurate du...

A research was carried out so as to determine the effect of Iranian green tea (IGT) powder in diet on blood metabolites and carcass traits of broiler chickens. Therefore, considered four treatments consisting (basic diet + IGT 5g/kg feed, basic diet + IGT 10g/kg feed, basic diet + IGT 15g/kg feed and one control diet without additive), and three replicates (15 chicks per repea...

Polyaniline is a conductive polymer with distinctive optical and electrical properties. Its enzymatic synthesis is an environmentally friendly alternative to the use of harsh oxidants and extremely acidic conditions. 7D5L, a high-redox potential laccase developed in our lab, is the biocatalyst of choice for the synthesis of green polyaniline (emeraldine salt) due to its superior ability to oxid...

Employing a green and efficient 2,2,2trifluoroacetophenone-catalyzed oxidation of alkenes, which utilizes H2O2 as the green oxidant, a novel and sustainable synthesis of indolines and pyrrolidines was developed. This constitutes a cheap, general and environmentally-friendly protocol for the synthesis of substituted nitrogen-containing heterocycles. A variety of substitution patterns, both aroma...

A facile, green, one-pot oxidation of primary alcohols to carboxylic acids with broad substrate applicability has been developed by employing an expedient catalytic system consisting of 1-Me-AZADO+X-/NaClO2.

this study was carried out to evaluate the effects of red onion (allium cepa l.) juice and green tea (camellia sinenses) extract on lipid oxidation and sensory characteristics of refrigerated (4ºc) sturgeon fillets (acipenser persicus). fresh fillets were tumbled in 1%, 2.5%, and 5% (v/v) aqueous solutions of onion juice (oj) and tea extract (te), and then stored for up to 8 days at 4°c in a re...