We constructed and characterized a Xanthomonas campestris pv. phaseoli oxyR mutant. The mutant was hypersensitive to H2O2 and menadione killing and had reduced aerobic plating efficiency. The oxidants' induction of the catalase and ahpC genes was also abolished in the mutant. Analysis of the adaptive responses showed that hydrogen peroxide-induced protection against hydrogen peroxide was lost, ...

Hydrogen peroxide sensing microelectrodes for scanning electrochemical microscopy (SECM) have been developed and used to measure hydrogen peroxide in the diffusion layer during electrochemical reduction of oxygen on gold and carbon electrodes. These microelectrode biosensors were also used to detect immobilized glucose oxidase through the production of hydrogen peroxide during enzymatic oxidati...

antioxidant active packaging is one of the active packaging that prevents of lipid oxidation by releasing antioxidant during storage of food. in recent years the use of natural antioxidant instead of the synthetic variety in these packaging has been considered. the aim of this study was evaluating the performance of polymeric film coated with natural antioxidant (rosemary extract) to prevent li...

Three approaches were examined for the reutilization of cold caustic extraction (CCE) lye. The term CCE lye refers here to used NaOH solution with relatively high alkali content, which could be wasted if not reused properly. results showed that can effectively applied in deinking, alkaline hydrogen peroxide bleaching, and oxygen delignification processes. improved physical strength dried sheet ...

ABSTRACT This study was carried out with the objective of evaluating water relations, photosynthetic pigments and growth passion fruit cv. BRS Rubi do Cerrado, as a function cationic nature irrigation exogenous application hydrogen peroxide. The experiment under greenhouse conditions in Pombal – PB, Brazil. experimental design randomized blocks, 6 × 4 factorial scheme, corresponding to six - CN...

A new mechanism for alkane functionalization by iron(III)-peroxide adducts was pro­ posed, and the importance of electrophilic nature of the metal-peroxide adduct with t] 1coordination mode was emphasized. This idea suggests that formation of high-valent ironoxo species occurs most likely when the metal-peroxide intermediate is activated through electronic interaction with both the peripheral o...

The kinetics of nitroxide-mediated dispersion copolymerization with crosslinking styrene (STY) and divinylbenzene (DVB) in supercritical carbon dioxide (scCO2) is addressed experimentally. 2,2,6,6-Tetramethylpiperidinyl-1-oxy (TEMPO) dibenzoyl peroxide (BPO) were used as nitroxide controller initiator, respectively. A high-pressure cell lateral sapphire windows at 120 °C 207 bar was to carry ou...

Background and Aims:In neurodegenerative disorders,oxidative stress mediated by reactive oxygen species is strongly associated with increased neuronal damages which can lead to apoptosis. Pro-apoptotic and anti-apoptotic gene expressions are changed during the cell differentiation that affect cell viability and differentiation. Therefore, this study was conducted to determine the effects of hyd...