Topic
Hydrogen peroxide
About: Hydrogen peroxide is a research topic. Over the lifetime, 42583 publications have been published within this topic receiving 1043732 citations. The topic is also known as: H2O2 & dioxidane.
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TL;DR: Investigation of the feasibility of using hydrogen peroxide as a chemical oxidant for in-situ treatment of contaminated surface soils found it decomposed readily by interacting with the natural iron content of sand, and additional ferrous salts further enhanced the extent of H 2 O 2 decomposition.
Abstract: The objective of this study was to investigate the feasibility of using hydrogen peroxide (H 2 O 2 ) as a chemical oxidant for in-situ treatment of contaminated surface soils. The process has been tested in the presence and absence of ferrous sulfate on sand-packed columns, which contained pentachlorophenol (PCP) and trichloroethylene (TCE) as model compounds. Both column and batch studies have demonstrated that H 2 O 2 decomposed readily by interacting with the natural iron content of sand, and additional ferrous salts further enhanced the extent of H 2 O 2 decomposition. As a result, PCP and TCE adsorbed on the sand surface were oxidized effectively and by stoichiometric release of organic bound chlorine as chloride ion
236 citations
TL;DR: Peroxidases, functionally linked to hydrogen peroxide-generating systems, could provide phagocytic cells with the ability to kill many fungal species.
Abstract: In the presence of hydrogen peroxide and either potassium iodide, sodium chloride, or potassium bromide, purified human myeloperoxidase was rapidly lethal to several species of Candida. Its candidacidal activity was inhibited by cyanide, fluoride, and azide, and by heat inactivation of the enzyme. A hydrogen peroxidegenerating system consisting of d-amino acid oxidase, flavine-adenine dinucleotide, and d-alanine could replace hydrogen peroxide in the candidacidal system. Horseradish peroxidase and human eosinophil granules also exerted candidacidal activity in the presence of iodide and hydrogen peroxide; however, unlike myeloperoxidase or neutrophil granules, these peroxidase sources were inactive when chloride replaced iodide. Cells of Saccharomyces, Geotrichum, and Rhodotorula species, and spores of Aspergillus fumigatus and A. niger were also killed by the combination of myeloperoxidase, iodide, and hydrogen peroxide. Peroxidases, functionally linked to hydrogen peroxide-generating systems, could provide phagocytic cells with the ability to kill many fungal species.
236 citations
TL;DR: The degradation of chitosan by hydrogen peroxide was studied in this article, where the degradation was monitored by gel permeation chromatography (GPC) and the molecular weight distribution of partially degraded products from homogeneous reaction displayed a single-modal curve whereas that from heterogeneous reaction was bimodal.
236 citations
TL;DR: This data imply that Prdx1 can function as a peroxide receptor in response to extracellular H(2)O(2), receiving the peroxide signal and transducing it into a disulfide bond that is subsequently transmitted to the substrate, ASK1, resulting in p38 phosphorylation.
236 citations
TL;DR: The first instrumental method for simultaneous determination of peroxyacetic acid and hydrogen peroxide has been developed and external calibration with the solid standards of MTSO and TPPO leads to a very accurate and reliable method.
Abstract: The first instrumental method for simultaneous determination of peroxyacetic acid (PAA) and hydrogen peroxide has been developed. The successive quantitative reaction of PAA with methyl p-tolyl sulfide (MTS) and hydrogen peroxide with triphenylphosphine (TPP) yields the corresponding sulfoxide MTSO and phosphine oxide TPPO. The reagents and their oxides are separated by HPLC on reversed-phase columns with acetonitrile/water gradient elution within 5 min. External calibration with the solid standards of MTSO and TPPO leads to a very accurate and reliable method. Samples are stable and can be stored after derivatization for several days prior to analysis. Real samples from brewery disinfection were analyzed in comparison to titration with excellent correlation.
236 citations