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Artículos de revistas sobre el tema "Hydrogen peroxide production"

Autor: Grafiati

Publicado: 19 de octubre de 2024

Última modificación: 31 de julio de 2025

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1

Moy, Terence I., Eleftherios Mylonakis, Stephen B. Calderwood, and Frederick M. Ausubel. "Cytotoxicity of Hydrogen Peroxide Produced by Enterococcus faecium." Infection and Immunity 72, no. 8 (2004): 4512–20. http://dx.doi.org/10.1128/iai.72.8.4512-4520.2004.

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ABSTRACT Although the opportunistic bacterial pathogen Enterococcus faecium is a leading source of nosocomial infections, it appears to lack many of the overt virulence factors produced by other bacterial pathogens, and the underlying mechanism of pathogenesis is not clear. Using E. faecium-mediated killing of the nematode worm Caenorhabditis elegans as an indicator of toxicity, we determined that E. faecium produces hydrogen peroxide at levels that cause cellular damage. We identified E. faecium transposon insertion mutants with altered C. elegans killing activity, and these mutants were alte

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2

Kusakabe, Ryo. "Hydrogen Peroxide Bleaching. Production, Properties and Handling of Hydrogen Peroxide." JAPAN TAPPI JOURNAL 52, no. 5 (1998): 608–15. http://dx.doi.org/10.2524/jtappij.52.608.

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3

Stepanskyi, D. O., G. M. Kremenchutsky, V. I. Chuyko, I. P. Koshova, O. V. Khomiak, and T. Y. Krushynska. "HYDROGEN PEROXIDE PRODUCTION ACTIVITY AND ADHESIVE PROPERTIES OF AEROCOCCI, ISOLATED IN WOMEN." Annals of Mechnikov Institute, no. 2 (June 7, 2017): 53–56. https://doi.org/10.5281/zenodo.803870.

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<strong>Introduction. </strong>Antagonistic activity of probiotic microorganisms against other species of bacteria is an important mechanism of their ecology and it is widely used in practice. This activity is inherent in many heme-deficient bacteria, which include aerococci, and can be composed of several components: the production of organic acids, antibiotics, lysozyme, hydrogen peroxide and others. Ability to produce hydrogen peroxide under aerobic conditions and in a state of relative anaerobiosis was established in aerococci. They were divided into strong and weak producers, depending on

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4

Mikashinowich, Z. I., and Ye V. Olempieva. "State of antioxidant blood system at physiological pregnancy and pregnancy complicated with bleeding." Bulletin of Siberian Medicine 7, no. 2 (2008): 101–5. http://dx.doi.org/10.20538/1682-0363-2008-2-101-105.

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The task of our investigation was the analysis of enzyme activity of antioxidant defense in women blood at physiological pregnancy and pregnancy complicated with hypertension. It was established that hyper production of hydrogen peroxide and glutathione peroxidase activation at physiological pregnancy improved microcirculation due to vasodilatation effect of hydrogen peroxide. It was established that activation of superoxiddysmutase and myeloperoxidase at pregnancy complicated with hypertension developed endothelial dysfunction owing to citotoxic effects of hydrogen peroxide.

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5

Meizler, A., F. A. Roddick, and N. A. Porter. "Continuous enzymatic treatment of 4-bromophenol initiated by UV irradiation." Water Science and Technology 62, no. 9 (2010): 2016–20. http://dx.doi.org/10.2166/wst.2010.550.

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Horseradish peroxidase (HRP) can be used for the treatment of halogenated phenolic substances. In the presence of hydrogen peroxide phenols are oxidized to form polymers which undergo partial dehalogenation. However, when immobilized, the peroxidase is subject to inactivation due to blockage of the active sites by the growing polymers and to deactivation by elevated levels of hydrogen peroxide. When HRP immobilized on a novel glass-based support incorporating titanium dioxide is subjected to UV irradiation, hydrogen peroxide is produced and the nascent polymer is removed. In this work a reacto

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6

Xi, Dawei, Yuheng Wu, Yuli Li, and Michael J. Aziz. "Electrifying Industrial Hydrogen Peroxide Production." ECS Meeting Abstracts MA2024-02, no. 25 (2024): 2006. https://doi.org/10.1149/ma2024-02252006mtgabs.

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Current hydrogen peroxide (H2O2) production is dominantly made through thermocatalytic anthraquinone autoxidation (t-AO) method at industrial scale. Incumbent anthraquinone hydrogenation involves pressurized hydrogen input and requires palladium-based catalysts that can over-reduce anthraquinone to non-reactive molecules. A considerable amount of energy is associated with the distillation and transportation of H2O2, which could be avoided with decentralized electrochemical H2O2 production methods. We developed an interfacial hydrogen atom transfer reaction between an aqueous and a nonaqueous p

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7

Šnyrychová, Iva, Péter B. Kós, and Éva Hideg. "Hydroxyl radicals are not the protagonists of UV-B-induced damage in isolated thylakoid membranes." Functional Plant Biology 34, no. 12 (2007): 1112. http://dx.doi.org/10.1071/fp07151.

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The production of reactive oxygen species (ROS) was studied in isolated thylakoid membranes exposed to 312 nm UV-B irradiation. Hydroxyl radicals (•OH) and hydrogen peroxide were measured directly, using a newly developed method based on hydroxylation of terephthalic acid and the homovanillic acid/peroxidase assay, respectively. At the early stage of UV-B stress (doses lower than 2.0 J cm–2), •OH were derived from superoxide radicals via hydrogen peroxide. Production of these ROS was dependent on photosynthetic electron transport and was not exclusive to UV-B. Both ROS were found in samples ex

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8

Marto, Carlos Miguel, Mafalda Laranjo, Anabela Paula, et al. "Cytotoxic Effects of Zoom® Whitening Product in Human Fibroblasts." Materials 13, no. 7 (2020): 1491. http://dx.doi.org/10.3390/ma13071491.

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Tooth whitening procedures are increasing; however, side effects can occur, such as damage to pulp cells, by the whitening products. This study aims to assess the cellular effects promoted by a whitening product, namely, the oxidative stress fostered by the active agent hydrogen peroxide, with and without photoactivation. Additionally, if cellular recovery occurred, we intended to determine the time point where cells recover from the tooth whitening induced damage. Human fibroblasts were exposed to hydrogen peroxide, Zoom®, Zoom® + irradiation, and irradiation alone. The following analysis was

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9

Hou, Yan, Fan Gong Kong, Shou Juan Wang, and Gui Hua Yang. "Novel Gas Diffusion Electrode System for Effective Production of Hydrogen Peroxide." Applied Mechanics and Materials 496-500 (January 2014): 159–62. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.159.

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Hydrogen peroxide production via cathodic reduction of oxygen on self-made gas diffusion electrode was investigated in an undivided electrochemical system. The effects of mass ratio between graphite and PTFE in cathode, the calcination temperature, current density, pH, and plate distance on hydrogen peroxide generation were discussed. The results showed that the self-made gas diffusion cathode had high catalyze capacity for production of hydrogen peroxide using cathodic oxygen-reducing reaction. The hydrogen peroxide concentration could reach 80.52 mg·L- 1 within 2 h. The optimal conditions fo

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10

Shvinka, Juris E., Lolita M. Pankova, Ineta N. Mežbårde, and Leons J. Licis. "Hydrogen peroxide production by Zymomonas mobilis." Applied Microbiology and Biotechnology 31, no. 3 (1989): 240–45. http://dx.doi.org/10.1007/bf00258402.

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11

Fukuzumi, Shunichi, and Yusuke Yamada. "Thermal and Photocatalytic Production of Hydrogen Peroxide and its Use in Hydrogen Peroxide Fuel Cells." Australian Journal of Chemistry 67, no. 3 (2014): 354. http://dx.doi.org/10.1071/ch13436.

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This mini review describes our recent developments on the thermal and photocatalytic production of hydrogen peroxide and its use in hydrogen peroxide fuel cells. Selective two-electron reduction of dioxygen to hydrogen peroxide by one-electron reductants has been made possible by using appropriate metal complexes with an acid. Protonation of the ligands of the complexes facilitates the reduction of O2. The photocatalytic two-electron reduction of dioxygen to hydrogen peroxide also occurs using organic photocatalysts and oxalic acid as an electron source in buffer solutions. The control of the

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12

Leont'eva, S. V., M. R. Flid, M. A. Trushechkina, M. V. Babotina, V. R. Flid, and A. V. Sulimov. "LOW-WASTE TECHNOLOGY OF GLYCIDOL PRODUCTION BY PEROXIDE METHOD." Fine Chemical Technologies 13, no. 3 (2018): 49–56. http://dx.doi.org/10.32362/24106593-2018-13-3-49-56.

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A technological process of manufacturing glycidol designed for the production capacity of 10 thousand tons per year and consisting in the direct oxidation of allyl alcohol with an aqueous solution of hydrogen peroxide in the presence of nanostructured titanium silicate in methanol is proposed. Due to the exothermic process, the solvent is not only a homogenizer of the mixture of the initial reagents of the epoxy process - allyl alcohol and hydrogen peroxide ensuring their interaction on the surface of the solid catalyst: it also prevents overheating of the reaction mass. On the basis of the re

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13

dos Reis, Valdison Pereira, Sulamita da Silva Setúbal, Alex A. Ferreira e Ferreira, et al. "Light Emitting Diode Photobiomodulation Enhances Oxidative Redox Capacity in Murine Macrophages Stimulated with Bothrops jararacussu Venom and Isolated PLA2s." BioMed Research International 2022 (July 15, 2022): 1–9. http://dx.doi.org/10.1155/2022/5266211.

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Photobiomodulation therapy associated with conventional antivenom treatment has been shown to be effective in reducing the local effects caused by bothropic venoms in preclinical studies. In this study, we analyzed the influence of photobiomodulation using light emitting diode (LED) on the oxidative stress produced by murine macrophages stimulated with Bothrops jararacussu venom and it isolated toxins BthTX-I and BthTX-II. Under LED treatment, we evaluated the activity of the antioxidant enzymes catalase, superoxide dismutase, and peroxidase as well as the release of hydrogen peroxide and the

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14

Tryk, Donald A., Guoyu Shi, Katsuyoshi Kakinuma, Makoto Uchida, and Akihiro Iiyama. "Mechanisms for the Production and Suppression of Hydrogen Peroxide at the Hydrogen Electrode in Proton Exchange Membrane Fuel Cells and Water Electrolyzers: Theoretical Considerations." Catalysts 14, no. 12 (2024): 890. https://doi.org/10.3390/catal14120890.

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Hydrogen peroxide is inevitably produced at the hydrogen electrode in both the proton exchange membrane fuel cell (PEMFC) and the proton exchange membrane water electrolyzer (PEMWE) when platinum-based catalysts are used. This peroxide attacks and degrades the membrane, seriously limiting its lifetime. Here we review some of our previous efforts to suppress peroxide production using PtFe as a hydrogen evolution reaction (HER) catalyst and PtCo as a hydrogen oxidation reaction (HOR) catalyst. The mechanisms, which involve the chemical reaction of adsorbed hydrogen with oxygen, are examined usin

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15

Kregar, Ambroz, Andraž Kravos, and Tomaž Katrašnik. "Mathematical Model of Hydrogen Peroxide Production in Anode, Cathode, and Membrane of LT-PEMFC." ECS Meeting Abstracts MA2022-01, no. 35 (2022): 1524. http://dx.doi.org/10.1149/ma2022-01351524mtgabs.

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Degradation of proton exchange membrane in low-temperature fuel cells represents one of the main limiting factors for wider adoption of this clean, carbon emission free energy device. In combination with mechanical degradation caused by membrane swelling and shrinkage during water content change, chemical degradation of the membrane is considered to be the main mechanism leading to loss of membrane conductivity, membrane thinning and eventual pinhole formation. Chemical degradation is caused by the attack of reactive radical species on the perfluorinated polymer chains of the membrane, which a

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16

Papagiannis, Ioannis, Elias Doukas, Alexandros Kalarakis, George Avgouropoulos, and Panagiotis Lianos. "Photoelectrocatalytic H2 and H2O2 Production Using Visible-Light-Absorbing Photoanodes." Catalysts 9, no. 3 (2019): 243. http://dx.doi.org/10.3390/catal9030243.

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Hydrogen and hydrogen peroxide have been photoelectrocatalytically produced by electrocatalytic reduction using simple carbon electrodes made by depositing a mesoporous carbon film on carbon cloth. Visible-light-absorbing photoanodes have been constructed by depositing mesoporous CdS/TiO2 or WO3 films on transparent fluorine-doped tin oxide (FTO) electrodes. Both produced substantial photocurrents of up to 50 mA in the case of CdS/TiO2 and 25 mA in the case of WO3 photoanodes, and resulting in the production of substantial quantities of H2 gas or aqueous H2O2. Maximum hydrogen production rate

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17

Papagiannis, Ioannis, Nikolaos Balis, Vassilios Dracopoulos, and Panagiotis Lianos. "Photoelectrocatalytic Hydrogen Peroxide Production Using Nanoparticulate WO3 as Photocatalyst and Glycerol or Ethanol as Sacrificial Agents." Processes 8, no. 1 (2019): 37. http://dx.doi.org/10.3390/pr8010037.

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Photoelectrochemical production of hydrogen peroxide was studied by using a cell functioning with a WO3 photoanode and an air breathing cathode made of carbon cloth with a hydrophobic layer of carbon black. The photoanode functioned in the absence of any sacrificial agent by water splitting, but the produced photocurrent was doubled in the presence of glycerol or ethanol. Hydrogen peroxide production was monitored in all cases, mainly in the presence of glycerol. The presence or absence of the organic fuel affected only the obtained photocurrent. The Faradaic efficiency for hydrogen peroxide p

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18

Saraf, Isha, Varun Kushwah, Bernd Werner, Klaus Zangger, and Amrit Paudel. "Quantification of Hydrogen Peroxide in PVP and PVPVA Using 1H qNMR Spectroscopy." Polymers 17, no. 6 (2025): 739. https://doi.org/10.3390/polym17060739.

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Objective: Peroxides in pharmaceutical products and excipients pose risks by oxidizing drug molecules, leading to potential toxicity and reduced efficacy. Accurate peroxide quantification is essential to ensure product safety and potency. This study explores the use of quantitative proton nuclear magnetic resonance (1H qNMR) spectroscopy as a sensitive and specific method for quantifying peroxide levels in pharmaceutical excipients. Methods: 1H qNMR spectroscopy was employed to measure peroxide levels down to 0.1 ppm in excipients, focusing on poly(vinylpyrrolidone) (PVP) and polyvinylpyrrolid

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19

Wolin, M. S., J. M. Rodenburg, E. J. Messina, and G. Kaley. "Oxygen metabolites and vasodilator mechanisms in rat cremasteric arterioles." American Journal of Physiology-Heart and Circulatory Physiology 252, no. 6 (1987): H1159—H1163. http://dx.doi.org/10.1152/ajpheart.1987.252.6.h1159.

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The effects of oxygen metabolites (superoxide anion and hydrogen peroxide) on male Wistar rat cremasteric arterioles and the involvement of these species in the mechanism of vasodilation to arachidonic acid and bradykinin were examined by in vivo television microscopy. In the present study, xanthine oxidase-derived oxygen metabolites from endogenous substrates elicited vasodilation that was selectively and almost completely inhibited by catalase but not by superoxide dismutase. These findings implicate hydrogen peroxide as the vasoactive metabolite generated. Topical application of hydrogen pe

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20

Pravda, Jay. "Systemic Lupus Erythematosus: Pathogenesis at the Functional Limit of Redox Homeostasis." Oxidative Medicine and Cellular Longevity 2019 (November 26, 2019): 1–11. http://dx.doi.org/10.1155/2019/1651724.

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Systemic lupus erythematosus (SLE) is a disease characterized by the production of autoreactive antibodies and cytokines, which are thought to have a major role in disease activity and progression. Immune system exposure to excessive amounts of autoantigens that are not efficiently removed is reported to play a significant role in the generation of autoantibodies and the pathogenesis of SLE. While several mechanisms of cell death-based autoantigenic exposure and compromised autoantigen removal have been described in relation to disease onset, a significant association with the development of S

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21

Bunik, Victoria I., and Martin D. Brand. "Generation of superoxide and hydrogen peroxide by side reactions of mitochondrial 2-oxoacid dehydrogenase complexes in isolation and in cells." Biological Chemistry 399, no. 5 (2018): 407–20. http://dx.doi.org/10.1515/hsz-2017-0284.

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Abstract Mitochondrial 2-oxoacid dehydrogenase complexes oxidize 2-oxoglutarate, pyruvate, branched-chain 2-oxoacids and 2-oxoadipate to the corresponding acyl-CoAs and reduce NAD+ to NADH. The isolated enzyme complexes generate superoxide anion radical or hydrogen peroxide in defined reactions by leaking electrons to oxygen. Studies using isolated mitochondria in media mimicking cytosol suggest that the 2-oxoacid dehydrogenase complexes contribute little to the production of superoxide or hydrogen peroxide relative to other mitochondrial sites at physiological steady states. However, the cont

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22

Szymczak, R., and TD Waite. "Generation and decay of hydrogen peroxide in estuarine waters." Marine and Freshwater Research 39, no. 3 (1988): 289. http://dx.doi.org/10.1071/mf9880289.

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Apart from its central role in photosynthesis, one of the most dramatic effects of light in marine and freshwater systems is its ability to generate reactive chemical intermediates. Of these, hydrogen peroxide is one of the more stable and easily detected. Aspects of the generation and decay of hydrogen peroxide in the Port Hacking River estuary, New South Wales, have been investigated in a number of field and laboratory studies. Peroxide concentrations in surface waters in the early morning are relatively uniform over the estuary and typically less than 35 nM, whereas concentrations in mid-af

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23

TOIVONEN, PETER M. A., CHANGWEN LU, SUSAN BACH, and PASCAL DELAQUIS. "Modulation of Wound-Induced Hydrogen Peroxide and Its Influence on the Fate of Escherichia coli O157:H7 in Cut Lettuce Tissues." Journal of Food Protection 75, no. 12 (2012): 2208–12. http://dx.doi.org/10.4315/0362-028x.jfp-12-208.

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Wounding of lettuce tissue has been examined previously by others in regard to browning reactions, and treatments to modulate wounding responses were evaluated for reduction of browning. However, the wounding process also releases oxygen radicals such as hydrogen peroxide. This study focused on the evaluation of two treatments that reduce hydrogen peroxide at cut surfaces (heat treatment and pyruvate addition) and one treatment that enhances its production (infusion with the fungal elicitor harpin). Hydrogen peroxide changes in response to treatment were also associated with resultant survival

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24

Palenik, Brian, O. C. Zafiriou, and F. M. M. Morel. "Hydrogen peroxide production by a marine phytoplankter1." Limnology and Oceanography 32, no. 6 (1987): 1365–69. http://dx.doi.org/10.4319/lo.1987.32.6.1365.

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25

Zhu, Chongqin, and Joseph S. Francisco. "Production of hydrogen peroxide enabled by microdroplets." Proceedings of the National Academy of Sciences 116, no. 39 (2019): 19222–24. http://dx.doi.org/10.1073/pnas.1913311116.

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26

Liu, Jiali, Yousheng Zou, Bingjun Jin, Kan Zhang, and Jong Hyeok Park. "Hydrogen Peroxide Production from Solar Water Oxidation." ACS Energy Letters 4, no. 12 (2019): 3018–27. http://dx.doi.org/10.1021/acsenergylett.9b02199.

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27

Jiang, Zhen-Yue, Alison C. S. Woollard, and Simon P. Wolff. "Hydrogen peroxide production during experimental protein glycation." FEBS Letters 268, no. 1 (1990): 69–71. http://dx.doi.org/10.1016/0014-5793(90)80974-n.

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Grivennikova, Vera G., Gary Cecchini, and Andrei D. Vinogradov. "Ammonium-dependent hydrogen peroxide production by mitochondria." FEBS Letters 582, no. 18 (2008): 2719–24. http://dx.doi.org/10.1016/j.febslet.2008.06.054.

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Giulivi, Cecilia, Paul Hochstein, and Kelvin J. A. Davies. "Hydrogen peroxide production by red blood cells." Free Radical Biology and Medicine 16, no. 1 (1994): 123–29. http://dx.doi.org/10.1016/0891-5849(94)90249-6.

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Hou, Huilin, Xiangkang Zeng, and Xiwang Zhang. "Production of Hydrogen Peroxide by Photocatalytic Processes." Angewandte Chemie International Edition 59, no. 40 (2020): 17356–76. http://dx.doi.org/10.1002/anie.201911609.

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31

De Baerdemaeker, F., M. Šimek, M. Člupek, P. Lukeš, and C. Leys. "Hydrogen peroxide production in capillary underwater discharges." Czechoslovak Journal of Physics 56, S2 (2006): B1132—B1139. http://dx.doi.org/10.1007/s10582-006-0339-4.

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Kleinveld, H. A., W. Sluiter, A. M. C. Boonman, A. J. G. Swaak, C. E. Hack, and J. F. Koster. "Differential stimulation by oxygen-free-radical-altered immunoglobulin G of the production of superoxide and hydrogen peroxide by human polymorphonuclear leucocytes." Clinical Science 80, no. 4 (1991): 385–91. http://dx.doi.org/10.1042/cs0800385.

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1. The effect of free-radical-altered IgG (monomer and polymer u.v.-irradiated IgG), compared with that of native and heat-aggregated IgG, on the production rate of superoxide anion and hydrogen peroxide by granulocytes (polymorphonuclear leucocytes) from normal blood and granulocytes obtained from the blood and synovial fluid of patients with rheumatoid arthritis was studied. 2. Similar rates of superoxide production by granulocytes from normal blood at rest and in the presence of any form of IgG were found. In contrast, the rate of hydrogen peroxide production could be stimulated in a dose-d

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Walker, P. D., and S. V. Shah. "Gentamicin enhanced production of hydrogen peroxide by renal cortical mitochondria." American Journal of Physiology-Cell Physiology 253, no. 4 (1987): C495—C499. http://dx.doi.org/10.1152/ajpcell.1987.253.4.c495.

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Agents that affect mitochondrial respiration have been shown to enhance the generation of reactive oxygen metabolites. On the basis of the well-demonstrated ability of gentamicin to alter mitochondrial respiration (stimulation of state 4 and inhibition of state 3), it was postulated that gentamicin may enhance the generation of reactive oxygen metabolites by renal cortical mitochondria. The aim of this study was to examine the effect of gentamicin on the production of hydrogen peroxide (measured as the decrease in scopoletin fluorescence) in rat renal cortical mitochondria. The hydrogen peroxi

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Salahudeen, A., K. Badr, J. Morrow, and J. Roberts. "Hydrogen peroxide induces 21-aminosteroid-inhibitable F2-isoprostane production and cytolysis in renal tubular epithelial cells." Journal of the American Society of Nephrology 6, no. 4 (1995): 1300–1303. http://dx.doi.org/10.1681/asn.v641300.

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F2-isoprostanes are the newly identified reactive oxygen species-catalyzed peroxidation products of arachidonate. The infusion of these prostaglandin F2-like prostanaoids into the rat kidney induces profound parallel reductions in RBF and GFR, suggesting that these metabolites may be partly responsible for the hemodynamic alterations seen in free radical-linked acute renal injury models. The present study examined directly in renal proximal tubular (LLC-PK1) cells whether hydrogen peroxide, a reactive oxygen species implicated in many models of acute renal injury, induces F2-isoprostane produc

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Li, Tian, Jun Deng, Tang Tang Bao, and Zhi Jun Wu. "Numerical Study on Effect of Hydrogen Peroxide Additive on Ethanol HCCI Engine." Advanced Materials Research 433-440 (January 2012): 244–50. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.244.

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In this article, based on a combined chemical mechanism with detailed ethanol oxidization and NO production mechanisms, a single cylinder ethanol HCCI engine model was established using the software CHEMKIN. Comparing with experimental data, this model can well predict cylinder pressure and NO emission. By changing mole fraction of hydrogen peroxide in initial ethanol mixture at different conditions, the effect of hydrogen peroxide additive on ethanol HCCI engine performance was investigated. The results show that hydrogen peroxide can effectively improve cylinder pressure and advance heat rel

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KETTLE, Anthony J., Craig A. GEDYE, and Christine C. WINTERBOURN. "Mechanism of inactivation of myeloperoxidase by 4-aminobenzoic acid hydrazide." Biochemical Journal 321, no. 2 (1997): 503–8. http://dx.doi.org/10.1042/bj3210503.

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Hypochlorous acid is the most powerful oxidant generated by neutrophils and is likely to contribute to the damage mediated by these inflammatory cells. The haem enzyme myeloperoxidase catalyses its production from hydrogen peroxide and chloride. 4-Aminobenzoic acid hydrazide (ABAH) is a potent inhibitor of hypochlorous acid production. In this investigation we show that, in the presence of hydrogen peroxide, ABAH irreversibly inactivates myeloperoxidase. ABAH was oxidized by myeloperoxidase, and kinetic analysis of the inactivation conformed to that for a mechanism-based inhibitor. Inactivatio

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Monteiro, Mayra K. S., Ángela Moratalla, Cristina Sáez, Elisama V. Dos Santos, and Manuel A. Rodrigo. "Production of Chlorine Dioxide Using Hydrogen Peroxide and Chlorates." Catalysts 11, no. 12 (2021): 1478. http://dx.doi.org/10.3390/catal11121478.

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Chlorine dioxide was produced by the reduction of chlorate with hydrogen peroxide in strongly acidic media. To avoid reaction interference during measuring procedures, UV spectra were acquired to monitor the chlorate reduction. This reduction led to the formation of chlorine dioxide and notable concentrations of chlorite and hypochlorous acid/chlorine, suggesting that the hydrogen peroxide:chlorate ratio is important. Once chlorates are transformed to chlorine dioxide, the surplus hydrogen peroxide promoted the further reaction of the chlorinated species down to less-important species. Moreove

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Zheltouhova, E. Y., A. N. Kravchenko, and E. D. Kondrashina. "Optimization of the production process of solid household soap." Proceedings of the Voronezh State University of Engineering Technologies 81, no. 3 (2019): 23–27. http://dx.doi.org/10.20914/2310-1202-2019-3-23-27.

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In the study, the main emphasis is on improving organoleptic characteristics (color, smell, structure), as well as foaming ability and storage duration, the change of which will allow to obtain a better product. An organoleptic and qualitative analysis of solid laundry soap was carried out, due to which the main consumer shortcomings of the products were identified and the line and formulation of the production were optimized to eliminate them. The basis of the optimization is to equip additional containers with a peroxide supply and dosage masking system, the use of which is necessary due to

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39

Elsalamony, Radwa A., Dalia R. Abd El-Hafiz, Mohamed A. Ebiad, Abdo M. Mansour, and Lamia S. Mohamed. "Enhancement of hydrogen production via hydrogen peroxide as an oxidant." RSC Advances 3, no. 45 (2013): 23791. http://dx.doi.org/10.1039/c3ra43560a.

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Zhou, Li Na, Han Zhao, Yuan Liu, et al. "Synthesis of Graphene Oxide Frameworks and their Application in Electrocatalytic Preparation of Hydrogen Peroxide." Advanced Materials Research 1090 (February 2015): 43–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1090.43.

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The electrocatalytic performance of graphene oxide frameworks (GOFs) for producing hydrogen peroxide is reported. Three different GOFs are synthesized by interlinking the graphene oxide sheets with different boronic acid deviates through the hydrothermal method and their electrochemical performance are investigated via cyclic voltammetry (CV) and rotating disk electrode (RDE) experiments. Through these electrochemical experiments, we find GOFs favor a 2e-reduction pathway and perform high activity and selectivity in the hydrogen peroxide production process. Taking advantage of these catalysts

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41

Miao, Jie, Yong Mei Chen, and Ping Yu Wan. "Electrochemical Pre-Oxidation of Drinking Water by On-Site Electro-Generation of Hydrogen Peroxide." Advanced Materials Research 663 (February 2013): 413–16. http://dx.doi.org/10.4028/www.scientific.net/amr.663.413.

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Hydrogen peroxide is a green oxidizer. On-site electrochemical production of hydrogen peroxide has potential to become a new way for raw water pre-oxidation. The performance of electro-generation hydrogen peroxide was studied in the electrochemical reactor equipped with graphite felt as cathode and RuO2-IrO2-coated titanium mesh as anode. The effect of water flow rate, air flow rate and current density on concentration of hydrogen peroxide and energy consumption was studied. Results indicate that the optimal condition for the lowest energy consumption is to directly produce 5 mg/L of hydrogen

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42

Alen’kina, S. A., K. A. Trutneva, V. А. Velikov, and V. E. Nikitina. "Study of the Effect of Azospirillum Lectins on the Formation of Hydrogen Peroxide in Wheat Seedling Roots." Izvestiya of Saratov University. Chemistry. Biology. Ecology 12, no. 4 (2012): 56–63. http://dx.doi.org/10.18500/1816-9775-2012-12-4-56-63.

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We show that the lectins isolated from the surface of the nitrogenfixing soil bacterium Azospirillum brasilense Sp7 and its mutant defective in lectin activity, A. brasilense Sp7.2.3., can regulate the production of hydrogen peroxide in wheat seedling roots, which is associated with the activation of superoxide dismutase, peroxidase and oxalate oxidase, as well as with the inhibition of catalase activity. We show that activation of oxalate oxidase is the most rapidly inducible pathway for the formation of hydrogen peroxide in wheat seedling roots under the effect of lectins. The obtained data

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43

Santos Andrade, Tatiana, Ioannis Papagiannis, Vassilios Dracopoulos, Márcio César Pereira, and Panagiotis Lianos. "Visible-Light Activated Titania and Its Application to Photoelectrocatalytic Hydrogen Peroxide Production." Materials 12, no. 24 (2019): 4238. http://dx.doi.org/10.3390/ma12244238.

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Photoelectrochemical cells have been constructed with photoanodes based on mesoporous titania deposited on transparent electrodes and sensitized in the Visible by nanoparticulate CdS or CdS combined with CdSe. The cathode electrode was an air–breathing carbon cloth carrying nanoparticulate carbon. These cells functioned in the Photo Fuel Cell mode, i.e., without bias, simply by shining light on the photoanode. The cathode functionality was governed by a two-electron oxygen reduction, which led to formation of hydrogen peroxide. Thus, these devices were employed for photoelectrocatalytic hydrog

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RAOUF MAHDI, NITHAL. "PRODUCTION AND CHARACTERIZATION OF THREE BRUCELLA ANTIGENS, LIPOPOL- YSACCHRIDE (LPS), SONICATED CELLS AND WHOLE CELLS ANTIGEN." Iraqi Journal of Veterinary Medicine 20, no. 1 (1996): 13–23. http://dx.doi.org/10.30539/ijvm.v20i1.1569.

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Three types of Brucella abortus antigens were prepared: Lipopolysaccharide (LPS), sonicated cells and whole cells killed antigens. Enzyme-linked immunosorbent assay (ELSIA) was carried out in polysterene microtiter plates using horse-radish peroxidase conjugated to anti- normal bovine serum globuline with hydrogen peroxide and ortho-phenylenediamine as hydrogen as substrate. The results showed that the whole Brucella cells antigen gave the best distinguish between the positive and negative sera with lowest cross reactive with E. coli antiserum

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45

Tiku, M. L., J. B. Liesch, and F. M. Robertson. "Production of hydrogen peroxide by rabbit articular chondrocytes. Enhancement by cytokines." Journal of Immunology 145, no. 2 (1990): 690–96. http://dx.doi.org/10.4049/jimmunol.145.2.690.

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Abstract Recent evidence suggests that reactive oxygen intermediates may play a role in the etiology of cartilage matrix degradation in arthritis. We have previously established that normal articular chondrocytes can functionally act as macrophages. These functions include expression of class II MHC Ag, presentation of Ag and induction of mixed and autologous lymphocyte stimulation. Inasmuch as the production of reactive oxygen intermediates is a hallmark of macrophage activity during inflammatory response, we were interested in examining the ability of normal articular chondrocytes to produce

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46

Endo, Naoki, Takashi Toyama, Akira Naganuma, Yoshiro Saito, and Gi-Wook Hwang. "Hydrogen Peroxide Causes Cell Death via Increased Transcription of HOXB13 in Human Lung Epithelial A549 Cells." Toxics 8, no. 4 (2020): 78. http://dx.doi.org/10.3390/toxics8040078.

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Although homeobox protein B13 (HOXB13) is an oncogenic transcription factor, its role in stress response has rarely been examined. We previously reported that knockdown of HOXB13 reduces the cytotoxicity caused by various oxidative stress inducers. Here, we studied the role of HOXB13 in cytotoxicity caused by hydrogen peroxide in human lung epithelial A549 cells. The knockdown of HOXB13 reduced hydrogen peroxide-induced cytotoxicity; however, this phenomenon was largely absent in the presence of antioxidants (Trolox or N-acetyl cysteine (NAC)). This suggests that HOXB13 may be involved in the

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47

Larsen, Bryan, and Sandra White. "Antifungal Effect of Hydrogen Peroxide on Catalase-Producing Strains of Candida spp." Infectious Diseases in Obstetrics and Gynecology 3, no. 2 (1995): 73–78. http://dx.doi.org/10.1155/s1064744995000354.

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Objective: Clinical isolates of Candida were tested for the presence of catalase and susceptibility to hydrogen peroxide.Methods: MIC was tested by broth dilution technique and catalase was determined by a spectrophotometric procedure.Results: All 38 strains tested were inhibited by hydrogen peroxide in concentrations ranging from 4.4 to 88 mM/l, with non-albicans isolates generally requiring higher concentrations of hydrogen peroxide for inhibition. Growth media consisting of glucose and protein diminished the antifungal effectiveness of hydrogen peroxide, as did the presence of hemoglobin, i

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48

Forti, Juliane, Mariana Matulovic, Mario Mollo Neto, Felipe Santos, Marcos Lanza, and Rodnei Bertazzoli. "Hydrogen Peroxide Production in an Electrochemical Flow-by Reactor using Gas Diffusion Electrodes Modified with Organic Redox Catalysts." International Journal for Innovation Education and Research 8, no. 7 (2020): 152–70. http://dx.doi.org/10.31686/ijier.vol8.iss7.2463.

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This paper presents a proposal to use an electrochemical flow-by reactor for hydrogen peroxide electrogeneration using cathodes formed from the incorporation of organic redox catalysts (2-ethylanthraquinone, 2-tert-butylanthraquinone, alizarin, and azobenzene) in the structure of gas diffusion electrodes. These electrodes help circumvent the low solubility of oxygen in aqueous solutions. Organic redox catalysts, which typically contain quinone or azo groups in their structure, were added to the electrode mass in a 10% proportion. The electrodes were used to study the electrogeneration of hydro

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Queval, Guillaume, and Christine H. Foyer. "Redox regulation of photosynthetic gene expression." Philosophical Transactions of the Royal Society B: Biological Sciences 367, no. 1608 (2012): 3475–85. http://dx.doi.org/10.1098/rstb.2012.0068.

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Redox chemistry and redox regulation are central to the operation of photosynthesis and respiration. However, the roles of different oxidants and antioxidants in the regulation of photosynthetic or respiratory gene expression remain poorly understood. Leaf transcriptome profiles of a range of Arabidopsis thaliana genotypes that are deficient in either hydrogen peroxide processing enzymes or in low molecular weight antioxidant were therefore compared to determine how different antioxidant systems that process hydrogen peroxide influence transcripts encoding proteins targeted to the chloroplasts

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50

Kalavathi, D. Francisca. "Mineralization of Melanoidin by H₂O₂ Producing Enzymes from Marine Cyanobacteria Oscillatoria boryana BDU 92181." European Journal of Biology and Biotechnology 2, no. 3 (2021): 28–32. http://dx.doi.org/10.24018/ejbio.2021.2.3.198.

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Intracellular enzymes of Oscillatoria boryana BDU 92181 exhibited mineralizing activity on melanoidin, a recalcitrant pigment present in the distillery wastewater. Melanoidin decolourization was postulated to be due to the production of hydrogen peroxide and molecular oxygen released by the cyanobacterium during photosynthesis. The present study was aimed to find out the efficacy of the marine cyanobacterium O. boryana BDU 92181 in producing H2O2 and enzymes involved in hydrogen peroxide production with a view to utilize its potential for decolorization of melanoidin pigment in the distillery

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