Results 171 to 180 of about 97,747 (236)
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Hydroxylation of 3-nitrotyrosine by hydroxyl radical
Chinese Chemical Letters, 2007Abstract Hydroxylation of 3-nitrotyrosine (3-NT) and 3-NT containing peptide Gly-nitroTyr-Gly in aqueous solution by hydroxyl radical were investigated with gamma irradiation. The structures of the hydroxylated products were confirmed by electrospray ionization mass spectrometry and 1 H NMR spectrometry.
Yufen Zhao +3 more
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Asparagine Hydroxylation of the HIF Transactivation Domain: A Hypoxic Switch
Science, 2002The hypoxia-inducible factors (HIFs) 1α and 2α are key mammalian transcription factors that exhibit dramatic increases in both protein stability and intrinsic transcriptional potency during low-oxygen stress.
D. Lando +4 more
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Analytical Biochemistry, 1981
Abstract A mixture of xanthine or hypoxanthine and xanthine oxidase generates the superoxide radical, O2 • , and H2O2. In the presence of iron salts, O2 • and H2O2 can interact to produce the hydroxyl radical, OH·. Superoxide-dependent formation of OH· can be measured by its ability to hydroxylate salicylate as followed by an improved ...
Jasbir Chauhan +3 more
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Abstract A mixture of xanthine or hypoxanthine and xanthine oxidase generates the superoxide radical, O2 • , and H2O2. In the presence of iron salts, O2 • and H2O2 can interact to produce the hydroxyl radical, OH·. Superoxide-dependent formation of OH· can be measured by its ability to hydroxylate salicylate as followed by an improved ...
Jasbir Chauhan +3 more
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[6] Detection of hydroxyl radicals by aromatic hydroxylation
1994Publisher Summary The hydroxyl radical •OH is the most reactive species. The hydroxyl radical reacts at, or close to, a diffusion-controlled rate with all biological molecules, and its half-life in cells is estimated to be 10 -9 sec. It is produced when water is exposed to ionizing radiation, fragmenting the oxygen-hydrogen covalent bond, leaving a ...
Barry Halliwell, Harparkash Kaur
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Free Radical Research, 1999
Generation of hydroxyl radicals in terephthalate (benzene-1,4-dicarboxylic acid) solution yields fluorescent 2-hydroxy-terephthalate. The reaction product is stable for hours and can readily be assessed using standard fluorimeters. The efficiency, i.e.
Karl H. Summer, Manfred Saran
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Generation of hydroxyl radicals in terephthalate (benzene-1,4-dicarboxylic acid) solution yields fluorescent 2-hydroxy-terephthalate. The reaction product is stable for hours and can readily be assessed using standard fluorimeters. The efficiency, i.e.
Karl H. Summer, Manfred Saran
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Photocatalytic Hydrogen-Evolution Cross-Couplings: Benzene C-H Amination and Hydroxylation.
Journal of the American Chemical Society, 2016We present a blueprint for aromatic C-H functionalization via a combination of photocatalysis and cobalt catalysis and describe the utility of this strategy for benzene amination and hydroxylation.
Yi-Wen Zheng +7 more
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The screening of microorganisms for hydroxylation activity: Hydroxylation of diamantanols
Biotechnology Letters, 19821-and/or 4-diamantanols are hydroxylated by various species of the genus Rhizopus giving rise to diamantandiols. The GLC method revealed both the species specificity of the organism and substrate specificity in the bioconversion. The effectivity of biotransformation by some species of the genus Rhizopus indicates that the procedure could be used for ...
Miloslav Podojil +6 more
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Enzymatic hydroxylation reactions
Current Opinion in Biotechnology, 2000During the past 18 months, considerable progress has been made in the understanding of the key enzyme-substrate interactions that control the regioselectivity and stereoselectivity of the hydroxylation reaction performed by cytochrome-P450-dependent enzymes of mammalian origin. The manipulation of microbial hydroxylating enzymes, in both whole-cell and
Herbert L. Holland, Hedda K. Weber
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, 2018
Chemical modification of boron nitride nanosheets (BNNSs) is a simple but effective method to improve their dispersion and compatibility within polymer nanocomposites.
Kai Wu +5 more
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Chemical modification of boron nitride nanosheets (BNNSs) is a simple but effective method to improve their dispersion and compatibility within polymer nanocomposites.
Kai Wu +5 more
semanticscholar +1 more source
Effective Inhibition of Hydroxyl Radicals by Hydroxylated Biphenyl Compounds
Free Radical Research Communications, 1993In aqueous media, approximate rate constants for the reactions between hydroxyl radicals (.OH) and biphenyl compounds such as dehydrodieugenol, magnolol, honokiol, dehydrodidihydroeugenol, dehydrodivanillyl alcohol, and dehydrodicreosol were estimated by competition reactions for .OH between these biphenyls and 5,5-dimethyl-1-pyrroline-N-oxide (DMPO ...
Keisuke Makino +5 more
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