Results 251 to 260 of about 85,771 (308)
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Stereoselective mephobarbital hydroxylation cosegregates with mephenytoin hydroxylation
Clinical Pharmacology and Therapeutics, 1985The 8-hour urinary recovery of 4-hydroxy-mephobarbital has been measured after oral administration of racemic mephobarbital (90 mg) in 17 extensive (EM) and six poor (PM) metabolizer phenotypes of mephenytoin. The recovery of this metabolite was measurable in every EM and ranged from 2.5% to 48% (10.9% +/- 1.9% of dose), but was not detected in any PM (
A, Küpfer, R A, Branch
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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.
Jun Chen Dong +3 more
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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.
M, Saran, K H, Summer
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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.
M, Saran, K H, Summer
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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 ...
R, Richmond +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 ...
R, Richmond +3 more
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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 ...
J, Taira +5 more
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Microsomal hydroxylation of decane
Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1969Abstract 1. 1. Aliphatic hydrocarbons (hexane, octane and decane) were oxidized in the microsomes from the livers of mouse, rat, rabbit, beef, pigeon and chick embryo. 2. 2. The oxidation of decane by mouse liver microsomes required NADPH and O 2 .
K, Ichihara, E, Kusunose, M, Kusunose
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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 ...
H. Lipavská +6 more
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Cold Spring Harbor Protocols, 2007
INTRODUCTIONThe hydroxyl-radical footprinting methodology has wide applications to studying protein-DNA interactions, as well as structural perturbations (e.g., bending) that occur in DNA during protein binding. Hydroxyl radicals cleave DNA by abstracting a hydrogen atom from C4 of the sugar in the minor groove.
Michael, Carey, Stephen T, Smale
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INTRODUCTIONThe hydroxyl-radical footprinting methodology has wide applications to studying protein-DNA interactions, as well as structural perturbations (e.g., bending) that occur in DNA during protein binding. Hydroxyl radicals cleave DNA by abstracting a hydrogen atom from C4 of the sugar in the minor groove.
Michael, Carey, Stephen T, Smale
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Hydroxylated Kininogens and Kinins
1992Hydroxyprolyl-3-bradykinin was identified in the digest of purified human high molecular weight (H) kininogen with plasma kallikrein. Hydroxyproline was not detected in the heavy and light chains portions of H kininogen, although they include three possible sites for hydroxylation of proline by proline hydroxylase.
H, Kato, K, Enjyoji
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Microbial hydroxylation of acronycine
Journal of Medicinal Chemistry, 1974Aus Acronycin (II) erhalt man bei der biochemischen Oxidation mit Aspergillus alleaceus das 9-Hydroxy-Derivat (I), wahrend mit Streptomyces spectabilicus eine Hydroxylierung der Seitenkette zu (III) eintritt.
D R, Brannon, D R, Horton, G H, Svoboda
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