Humic substances (HS) from well waters, fertilizers, and synthetic phenolic polymers were characterized by elemental and UV-VIS spectroscopic analyses. Capillary zone electrophoresis (CZE) with UV absorption detection was used to analyze the lignin-derived phenolic distribution in the degradation residues after alkaline CuO oxidation of HS samples. Eleven phenols with p-acetyl, vanillyl and syr...

We have already reported (Bray, Ryman & Thorpe, 1947) upon the fate ofp-hydroxybenzoic acid and its amide in the rabbit. The present paper gives the corresponding results for the oand m-isomers. The changes which these compounds might undergo are theoretically the same as those for the p-isomer, i.e. the hydroxyl group may be conjugated with either glucuronic or sulphuric acids and the carboxyl...

Reaction energetics of the double (2H+/2e-), i.e., the first 1H+/1e- (catechol→ phenoxyl radical) and the second 1H+/1e- (phenoxyl radical→ quinone) free radical scavenging mechanisms of quercetin and its six colonic catecholic metabolites (caffeic acid, hydrocaffeic acid, homoprotocatechuic acid, protocatechuic acid, 4-methylcatechol, and catechol) were computationally studied using density fu...

In situ product recovery (ISPR), in the form of an extractive fermentation process, can increase productivity and titers sustainable production platform chemicals. To establish a guideline for development industrially relevant processes such bio-based compounds, wide screening was performed, mapping potential extensive range solvents solvent mixtures. Besides biocompatibility with Saccharomyces...

Magnetic molecular imprinted polymers nanozyme MIPs@Fe3O4-NH2 with high specificity and excellent peroxidase-like activity was prepared for colorimetric detection of protocatechuic acid (PCA). Firstly, obtained by self-polymerization dopamine as a functional monomer on the surface Fe3O4-NH2, enabling formation specific recognition cavities. Later, elution PCA using polar solvents resulted in cr...

The aim of this study was to determine the effects phenolic substances in different plants (mulberry, apple, walnut and plum) on hemocyte counts antioxidant enzyme activities Hyphantria cunea larvae infected with granulovirus (HycuGV) uninfected. In study, contents plant materials were firstly determined. Then, these ingredients uninfected As a result all groups increased infection activity, ph...

CONTEXT Sea buckthorn (Hippophae rhamnoides L.) as a traditional Chinese medicinal plant has various uses in Xinjiang. OBJECTIVE A reversed-phase rapid-resolution liquid-chromatography method with diode array detector was developed for simultaneous determination of protocatechuic acid, rutin, quercetin, kaempferol, and isorhamnetin in the pulp and seed of sea buckthorn, a widely used traditio...

In the present research, the copigmentations of malvidin-3-O-glucoside with five hydroxybenzoic cofactors (p-hydroxybenzoic acid, protocatechuic acid, gallic acid, vanillic acid, and syringic acid) were investigated. The influence of the concentration of these cofactors and the reaction temperature was examined. The equilibrium constant (K), stoichiometric ratio (n) and the thermodynamic parame...

This research was designed to determine what components of Gardenia jasminoides play a major role in inhibiting the enzymes related antidepressant activity of this plant. In our previous research, the ethyl acetate fraction of G. jasminosides fruits inhibited the activities of both monoamine oxidase-A (MAO-A) and monoamine oxidase-B (MAO-B), and oral administration of the ethanolic extract slig...

Sheep were fed two rations based on untreated (WS) and SO2-treated (SO2-WS) wheat straw, and the effect of chemical treatment and passage through the gastro-intestine on the composition and degradation of ester and ether-linked cell wall (CW) phenolics was studied. The SO2 treatment reduced the content of total ferulic acid (FA) and p-coumaric acid (PCA) by 35% while tripling the level of vanil...