Now showing items 1-10 of 18
Positive halogens from halides and hydrogen peroxide with organotellurium catalysts
(The American Chemical Society: Journal of the American Chemical Society, 1996-01-17)
The oxidations of sodium bromide, sodium chloride, and sodium iodide to positive halogen with hydrogen peroxide in two-phase systems of dichloromethane and pH 6 phosphate buffer were catalyzed by organotellurium catalysts ...
Horseradish peroxidase Phe172-->Tyr mutant. Sequential formation of compound I with a porphyrin radical cation and a protein radical.
(Waverly: Journal of Biological Chemistry, 1995-08-04)
A gene coding for the F172Y mutant of horseradish peroxidase isozyme C (HRP) has been constructed and expressed in both Spodoptera frugiperda (SF-9) and Trichoplusia ni egg cell homogenate (HighFive) cells. Homology modeling ...
Origins of high sequence selectivity: a stopped-flow kinetics study of DNA/RNA hybridization by duplex- and triplex-forming oligonucleotides
(The American Chemical Society: Biochemistry, 1995-08-01)
Stopped-flow UV kinetics and thermal denaturation experiments are used to examine the origins of high sequence selectivity and binding affinity of circular triplex-forming oligonucleotides with single-stranded DNA/RNA ...
Stepwise mechanism for oxidative addition of iodine to organotellurium(II) compounds as observed by stopped-flow spectroscopy
(The American Chemical Society: Organometallics, 1995-03)
The reaction of iodine with a series of diorgano tellurides was monitored by stopped-flow spectroscopy. For dihexyl telluride (11, diphenyl telluride (2), di-p-anisyl telluride (31, and phenyl 2-((dimethylamino)methyl)phenyl ...
A mechanism for the oxidation of glutathione to glutathione disulfide with organotellurium(IV) and organoselenium(IV) compounds. A stepwise process with implications for photodynamic therapy and other oxidative chemotherapy
(The American Chemical Society: The Journal of Organic Chemistry, 1994-12-30)
The reactions of telluroxides or their hydrates 3-5 with glutathione to give telluropyrylium dyes 1, 2 or diphenyl telluride, respectively, and glutathione disulfide have at least two discrete steps. A fast reaction, which ...
Stepwise mechanism for oxidative addition of bromine to organoselenium(II) and organotellurium(II) compounds
(The American Chemical Society: Organometallics, 1994-08)
The oxidative-addition reactions of bromine (5 x 10(-4) or 5 x 10(-5) M) to phenyl selenide (1), phenyl telluride (2), 2,6-di-tert-butylselenopyran-4-one (3), 2,6-di-tert-butyltelluropyran-4-one (4), 2,6-diphenyltelluropyran-4-one ...
Oxidation of telluropyrylium dyes with ozone, chlorine, and bromine. Differing regiochemical and kinetic behavior with respect to oxidations of oxygen-, sulfur-, and selenium-containing dyes
(The American Chemical Society: Organometallics, 1994-02)
Oxidations of telluropyrylium dyes 1-3 with ozone in water, chlorine in carbon tetrachloride, or bromine in carbon tetrachloride gave second-order rate constants of greater-than-or-equal-to 10(9) L mol-1 s-1 using stopped-flow ...
Characterization of dipyridophenazine complexes of ruthenium( 11): the light switch effect as a function of nucleic acid sequence and conformation
(The American Chemical Society: Biochemistry, 1992-11-10)
Spectroscopic parameters for two novel ruthenium complexes on binding to nucleic acids of varying sequences and conformations have been determined. These complexes, R~(bpy)~dppz~+ and Ru(phen)2dppz2+ (bpy = 2,2’-bipyridine; ...
Molecular “light switch” for DNA: Ru(bpy)2(dppz)2+
(The American Chemical Society: Journal of the American Chemical Society, 1990-06-06)
Photoreactions of the triruthenium cluster HRu3(CO)10 (.mu.-COCH3). Isomerization of the bridging alkylidyne ligand and competing ligand substitutions
(The American Chemical Society: Journal of the American Chemical Society, 1989-01-18)
Irradiation of the title compound HRu3(CO)10(u-COCH3) (A) in hydrocarbon solution under CO leads to the formation of the bridging u,n2 acyl isomer HRu3(CO)10(u,n2-C(O)CH3) (B). Quantum yields for isomerization phi-i were ...