(a.) Of, pertaining to, or derived from, copper; containing copper; -- said of those compounds of copper in which this element is present in its lowest proportion.
Example Sentences:
(1) The chemistry involved reaction rate constant measurements of MSF hydrolysis and for reactions with phenolic, amine, oxime, hydroxamic acid, phenyl N-hydroxycarbamate, and hydroxylamine compounds and cupric imidazole and bipyridyl complexes.
(2) Sulfate, with or without choline, had little effect in the presence of cupric sulfate.
(3) Its unexpectedly low value is interpreted that MSF does not possess a site with sufficient basicity to be protonated by strong acid, to enter into hydrogen bonding, or for coordination with the cupric ion.
(4) However, variations in cupric ion activity rather than pH per se could explain these effects.
(5) Saponin-permeabilized polymorphonuclear leukocytes (PMNs) released beta-glucuronidase, a lysosomal enzyme, dose-dependently in response to cupric phenanthroline (CuPh), a mild oxidant, which catalyzes the formation of disulfide bridges.
(6) Several copper and cupric ion sources were shown to kill or inhibit the growth of Neisseria gonorrhoeae in vitro.
(7) When these irradiated preparations are exposed to ferrous or cupric salts a further fragmentation of monoamine oxidase ensues, especially at acid pH.
(8) Condensation of the glyoxal obtained by cupric acetate oxidation of 21-hydroxycorticosteroids with acetous phenylhydrazine reagent affords a near UV chromophore.
(9) Intraperitoneal injections of cupric acetate increased serum levels of cholesterol and phospholipids without liver damage.
(10) It is suggested that cupric ions, at high concentrations, have an inhibiting effect on myometrial activity.
(11) The products formed were separated by chromatography on the paper; then they were stained with ninhydrin and converted into cupric complexes during extraction with ethanol; the optic density was measured at 510 nm.
(12) Under the conditions of this study, it is possible that cuprous ion would be oxidised to the cupric form generating free radicals in the process.
(13) These results suggest that the enzyme may have two essential carboxyl groups at the active site, one reactive with DAN in the presence of cupric ions and the other with EPNP, and that pepstatin binds part of the active site to inhibit the reactions with DAN and EPNP as well as the enzyme activity.
(14) The inhibition of xanthine oxidase by quercetin was not affected by cupric ion.
(15) Diagnostic potentialities of the crystallo-optic++ analysis of cupric chloride crystallographs++ were studied in 76 children with pyelonephritis and in 50 children with glomerulonephritis.
(16) Biotinylated DNA or RNA is used as a hybridization probe in solution, avidin is then added to label both the probe and hybrid molecules, and the hybridization mixture chromatographed over cupric-iminodiacetic acid agarose beads.
(17) Zinc, cupric, and cadmium ions, in that order of effectiveness, inhibited lysis of washed, rabbit erythrocytes by the toxic bacterial product aerolysin.
(18) Oxidative cyclization of 2',3'-O-isopropylideneadenosines to the corresponding 5'-O,8-cyclo-2',3'-O-isopropylideneadenosines was achieved by using by lead tetraacetate, cupric chloride, and N-halogeno-succinimide as an oxidant, and by irradiation with a uv-visible light in the presence of pyrimido[5,4-g]pteridinetetrone 5-oxide.
(19) The predominant site of interaction of cupric ion was the unsubstituted nitrogen atom (N-3) on the metronidazole molecule.
(20) Previously described false-negative results with vitamin C, bile, and certain antacids were confirmed, as were false-positive results with iodide, bromide, cupric sulfate, iron salts, and hypochlorite.
Cuprous
Definition:
(a.) Of, pertaining to, or derived from, copper; containing copper; -- said of those compounds of copper in which this element is present in its highest proportion.
Example Sentences:
(1) It is not known whether the toxic effect is due to the cuprous ion, per se, or to radicals generated in its oxidation.
(2) Under the conditions of this study, it is possible that cuprous ion would be oxidised to the cupric form generating free radicals in the process.
(3) This oxidation step is required for catalytic activity and is the basis of the two-electron redox reactivity for the enzyme active site: anaerobic addition of hydroxylic substrates results in reduction of the two-electron redox unit, and the spectral features associated with both the copper ion and the non-metal redox center are eliminated, apparently forming a cuprous site.
(4) The reduced cuprous complexes react with hydrogen peroxide to locally form hydroxyl radicals (OH.)
(5) The peptides were precipitated as cuprous mercaptides together with glutathione and resolved from the latter and from each other by preparative paper electrophoresis and chromatography either in the sulphonic acid form or as S-sulphonyl derivatives.
(6) We suggest that the green half-methemocyanin contains a metal center with one cuprous and one cupric copper without an exogenous nitrogen oxide ligand.
(7) It appears unlikely that an essential non-biological reaction, the reduction of ferric ions by stannous or cuprous ions, is involved.
(8) The DNA strand scission by the camptothecin-Cu(II)-UV light system, as well as the phage inactivation, was strongly suppressed by bathocuproine and catalase, indicating participation of cuprous species and hydrogen peroxide in the reaction.
(9) We found that the cuprous ion formed in this type of redox reaction could be detected and quantified using 2,2'-bicinchoninic acid.
(10) The appearance of a signal at g' = 2.95 in X-band EPR is consistent with, but does not prove, the model of Hagen where the g' = 12 signal arises from a ferryl heme a3, with CuB cuprous and EPR-silent (Hagen, W. R. (1982) Biochim.
(11) 2 Cuprous and potassium ions, although producing depolarization at 37 degrees C, failed to augment the depolarization due to heating to 45 degrees C. 3 Hydrogen peroxide caused depolarization which was potentiated by the presence of calcium, cupric or ferrous ions, but not by the presence of cuprous or potassium ions.
(12) Mannitol has been labeled with 99mTc by using cuprous chloride as a reducing agent.
(13) A marked inhibition was observed when Cd2+, Cu2+, or Zn2+ was bound to the organic anion; only 23% of the cadmium citrate, 14% of the zinc citrate, and 5% of the cuprous citrate had been decomposed.
(14) Tsuji's statement (1974) that cuprous copper thiocholine iodide is the final product of histochemical procedures investigated was confirmed.
(15) The palladium-catalyzed cross-coupling reaction of 2-iodoadenosine (4a) with various terminal alkynes in the presence of bis(triphenylphosphine)palladium dichloride and cuprous iodide in N,N-dimethylformamide containing triethylamine gives 2-alkynyladenosines (5a-r).
(16) In its cuprous form, the coordination complex with hydrogen peroxide as a coreactant cleaves DNA by oxidatively attacking the deoxyribose moiety.
(17) The activity of the enzyme is inhibited by sulfhydryl agents [p-chloromercuribenzoate, N-ethylmaleimide and 5,5-dithiobis (2-nitrobenzoic acid)], cuprous chloride, and ferrour nitrate.
(18) The long-term reversibility and potentiometric stability of such copper film-based sensors is enhanced (up to 1 month) by preventing the formation of cuprous oxide on the surfaces via the application of an external nonpolarizing cathodic current through the working electrode or by specifically using sputtered copper films that have [100] preferred crystal structures as determined by X-ray diffraction.
(19) Scission of the series of oligodeoxynucleotides by the cuprous complex of ortho-phenanthroline (OP-Cu) indicates that OP-Cu binds at the lesion-specific stable intercalation site, suggesting that OP-Cu intercalates into DNA.
(20) 5-Cyanouracil has been prepared in high yield from cuprous cyanide and 5-iodouracil.