What's the difference between cupreous and cuprous?
Cupreous
Definition:
(a.) Consisting of copper or resembling copper; coppery.
Example Sentences:
(1) The enzyme activation by cupreous ions is countered by the enzyme inhibition by cupric ions, the rate of inhibition being determined by the level of cupric ions.
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.