نتایج جستجو برای: copper species

تعداد نتایج: 625389  

Journal: :Marine environmental research 2010
Donatella Fedeli Manuel Carloni Giancarlo Falcioni

The oxidative action of copper on different trout Oncorhynchus mykiss erythrocyte components was studied. The results indicate that: --cupric ions differently influence the oxidative status of two trout hemoglobin components I and IV (HbI and HbIV) having different structural and functional properties; --reactive oxygen species (ROS) production associated with hemoglobins autoxidation is not in...

Journal: :Comparative Hepatology 2005
Bart Spee Paul JJ Mandigers Brigitte Arends Peter Bode Ted SGAM van den Ingh Gaby Hoffmann Jan Rothuizen Louis C Penning

BACKGROUND: The role of copper accumulation in the onset of hepatitis is still unclear. Therefore, we investigated a spontaneous disease model of primary copper-toxicosis in Doberman pinschers so to gain insights into the pathophysiology of copper toxicosis, namely on genes involved in copper metabolism and reactive oxygen species (ROS) defences. RESULTS: We used quantitative real-time PCR to d...

Journal: :Chemistry 2016
Thien H Ngo David Zieba Whitney A Webre Gary N Lim Paul A Karr Scheghajegh Kord Shangbin Jin Katsuhiko Ariga Marzia Galli Steve Goldup Jonathan P Hill Francis D'Souza

An electron-deficient copper(III) corrole was utilized for the construction of donor-acceptor conjugates with zinc(II) porphyrin (ZnP) as a singlet excited state electron donor, and the occurrence of photoinduced charge separation was demonstrated by using transient pump-probe spectroscopic techniques. In these conjugates, the number of copper corrole units was varied from 1 to 2 or 4 units whi...

1999
John M. Besser Kenneth J. Leib

Scientists participating in the USGS Abandoned Minelands Initiative have quantified metal concentrations and loadings from mining-related and natural background sources in the upper Animas River of southwestern Colorado, with the goal of guiding remediation decisions by federal landmanagement agencies. We have compared site-specific toxicity thresholds with frequencies of dissolved metal concen...

2013
Kevin M. Wright Deborah Lloyd David B. Lowry Mark R. Macnair John H. Willis

Most species are superbly and intricately adapted to the environments in which they live. Adaptive evolution by natural selection is the primary force shaping biological diversity. Differences between closely related species in ecologically selected characters such as habitat preference, reproductive timing, courtship behavior, or pollinator attraction may prevent interbreeding in nature, causi...

Journal: :chemistry of solid materials 2013
reza ojani fakhrosadat jamali jahan-bakhsh raoof sayed reza hosseini

copper nanoparticles were fabricated by electro-reduction of cuso4solution in the presence of cetyltrimethylammonium bromide (ctab) cationic surfactant as an additive through potentiostatic method. the prepared copper nanoparticles were characterized by scanning electron microscopy (sem) and electrochemical methods. the sem images reveal that the nanoparticles with diameters at about 70 n...

Journal: :Journal of the American Chemical Society 2016
J Brannon Gary Cooper Citek Timothy A Brown Richard N Zare Erik C Wasinger T Daniel P Stack

Histamine chelation of copper(I) by a terminal histidine residue in copper hydroxylating enzymes activates dioxygen to form unknown oxidants, generally assumed as copper(II) species. The direct formation of copper(III)-containing products from the oxygenation of histamine-ligated copper(I) complexes is demonstrated here, indicating that copper(III) is a viable oxidation state in such products f...

2016
Hemma Mistry Ana Sofia Varela Cecile S Bonifacio Ioannis Zegkinoglou Ilya Sinev Yong-Wook Choi Kim Kisslinger Eric A Stach Judith C Yang Peter Strasser Beatriz Roldan Cuenya

There is an urgent need to develop technologies that use renewable energy to convert waste products such as carbon dioxide into hydrocarbon fuels. Carbon dioxide can be electrochemically reduced to hydrocarbons over copper catalysts, although higher efficiency is required. We have developed oxidized copper catalysts displaying lower overpotentials for carbon dioxide electroreduction and record ...

Journal: :QJM : monthly journal of the Association of Physicians 1997
G F Chowrimootoo J Andoh C A Seymour

Inherited copper toxic disease, Wilson's disease, is an autosomal recessive disorder arising from a defect in biliary copper excretion. Although there are several pathognomonic clinical features, such a multisystem disease can be difficult to diagnose, particularly in the early stages of copper toxicity. Even measurements of serum copper and caeruloplasmin, the major copper-transporting protein...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2014
Jason L J Dearling Alan B Packard

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