نتایج جستجو برای: cu ii
تعداد نتایج: 632297 فیلتر نتایج به سال:
The sulphhydryl environment in various mixed-metal hybrid hemoglobins, viz. α2(Cu)β2(FeCO), α2(FeCO)-β2(Cu), α2(Cu)-β2(Ni), α2(Ni)-β2(Cu), was studied by reacting them with the sulphhydryl reagent, 4,4′-dithiodipyridine (4-PDS). The reactivity was compared with that of HbCO, NiHb and CuHb. It is found that there exists a correlation between conformational change and metal ion environment, not o...
The title mononuclear Cu(II) complex, [Cu(C(8)H(5)O(3))(2)(C(10)H(8)N(2))], is comprised of a Cu(II) cation, two 4-formyl-benzoate (L(-)) ligands and a 2,2'-bipyridine (bipy) ligand. The Cu(II) ion and bipy ligand lie on a crystallographic twofold rotation axis; the Cu(II) ion is coordinated by two N atoms from one bipy ligand and two O atoms from two different carboxyl-ate groups of two L(-) l...
کمپلکس¬هایی از مس(ii) با لیگاند باز شیف جدیدی سنتز شدند. فرمول این کمپلکس¬ها به¬صورت زیر است: [cu(ca2dien)(no3)2].2h2o [cu(ca2dien)(ncs)(no3)].h2o [cu(ca2dien)(n3)(no3)] [cu(ca2dien)cl2].2h2o [cu(ca2dien)(ch3coo)2] [cu(ca2dien)2]so4.3h2o که در آن¬ها : ca2dien=(e)-n1-((e)-3-phenylallylidene)-n2-(2-((e)-((e)-3-phenylidene) amino)ethyl)ethane-1,2-diamine لیگاند جدید باز شیف سه دندانه¬ای م...
In order to gain insight into the coordination site and oxidative activity of the CuM site of hydroxylases such as peptidylglycine α-hydroxylating monooxygenase (PHM), dopamine β-monooxygenase (DβM), and tyramine β-monooxygenase (TβM), we have synthesized, characterized and studied the oxidation chemistry of copper complexes chelated by tridentate N2Sthioether, N2Osulfoxide or N2Osulfone donor ...
Mutations in the metallo-protein Cu/Zn-superoxide dismutase (SOD1) cause amyotrophic lateral sclerosis (ALS) in humans and an expression level-dependent phenotype in transgenic rodents. We show that oral treatment with the therapeutic agent diacetyl-bis(4-methylthiosemicarbazonato)copper II [Cu II (atsm)] increased the concentration of mutant SOD1 (SOD1G37R) in ALS model mice, but paradoxically...
To examine the potential role of methanobactin (mb) as the extracellular component of a copper acquisition system in Methylosinus trichosporium OB3b, the metal binding properties of mb were examined. Spectral (UV-visible, fluorescence, and circular dichroism), kinetic, and thermodynamic data suggested copper coordination changes at different Cu(II):mb ratios. Mb appeared to initially bind Cu(II...
Under copper limiting growth conditions the methanotrophic bacterium Methylococcus capsulatus (Bath) secrets essentially only one protein, MopE*, to the medium. MopE* is a copper-binding protein whose structure has been determined by X-ray crystallography. The structure of MopE* revealed a unique high affinity copper binding site consisting of two histidine imidazoles and one kynurenine, the la...
Inorganic-organic hybrid materials based on Keggin polyoxometalate building blocks combined with Cu(II)/Cu(I) and flexible fluconazole ligand [1-(2,4-difluorophenyl)-1,1-bis[(1H-1,2,4-triazol-1-yl)methyl]methanol] (Hfcz) have been obtained by hydrothermal methods, namely, [Cu(II)(2)(Hfcz)(4)(SiW(12)O(40))].3H(2)O (1), [Cu(II)(4)(fcz)(4)(H(2)O)(4)(SiMo(12)O(40))].6H(2)O (2), [Cu(II)(2)(fcz)(2)][...
The synthesis of the symmetric pyrazine imide ligand, N-(2-pyrazylcarbonyl)-2-pyrazinecarboxamide, (Hdpzca) and five new first row transition metal complexes of it are reported: [M(II)(dpzca)(2)], M(II) = Fe, Cu, Zn; [Cu(II)(dpzca)(H(2)O)(2)]BF(4), [Cu(II)(dpzca)(H(2)O)(3)](2)SiF(6). The crystal structures of Hdpzca, [Co(II)(dpzca)(2)], [Cu(II)(dpzca)(2)], {[Co(III)(dpzca)(2)](BF(4))}(2)·5CH(3)...
Using a paraffin impregnated graphite electrode (PIGE) and mercury-modifiedpyrolytic graphite electrode with basal orientation (Hg-PGEb) copper(II) and Cu(II)-DNApurine base solutions have been studied by cyclic (CV) and linear sweep voltammetry(LSV) in connection with elimination voltammetry with linear scan (EVLS). In chlorideand bromide solutions (pH 6), the redox process of Cu(II) proceeded...
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