LXII.—On dihydroxybenzoic acids and iodosalicylic acids

Oxidation of Hydroxy- and Dihydroxybenzoic Acids Under the Udenfriend's Conditions. An HPLC Study

Background Non-enzymatic hydroxylation of aromatic compounds to the respective phenolic derivatives is a possible metabolic pathway of xenobiotics. The formed metabolites can undergo consecutive oxidative reactions with free radicals to form potential toxic molecules. Objective Development of HPLC methods to separate, identify and quantitate the main products formed from salicylic acid, 2,3-d...

Kinetics and Mechanisms of the Chromium(III) Reactions with 2,4- and 2,5-Dihydroxybenzoic Acids in Weak Acidic Aqueous Solutions

The reactions of 2,4- and 2,5-dihydroxybenzoic acids (dihydroxybenzoic acid, DHBA) with chromium(III) in weak acidic aqueous solutions have been shown to take place in at least two stages. The first stage of the reactions has an observed rate constant k(1(obs)) = k(1)[DHBA] + C and the corresponding activation parameters are DeltaH(1(2,4)) ( not equal) = 49, 5 kJ/mol(-1), DeltaS(1(2,4)) ( not e...

Response of laying hens to supplementation with various fatty acids when fed diets inadequate in protein and sulphur amino acids

Effects of drought stress on total phenolics, phenolic acids, polyamines and some organic acids in two important Iranian grapevine cultivars

  This study was conducted to assess the induced-changes in the content of total phenolics and individual phenolic acids, total and individual polyamines and some organic acids in the leaves of two important Iranian grapevine cultivars under different durations of drought stress, and to determine their involvement in grapevine drought tolerance. For this purpose, ‘Yaghuti’ as a drought-toler...

Effects of some salts and acids on citrus leaf abscission