نتایج جستجو برای: especially for copper
تعداد نتایج: 10457541 فیلتر نتایج به سال:
Although Neal, Becker & Shealy (193 I) appear to have been the first to suggest that deficiency of copper occurs naturally in livestock, it was Sjollema (1933) who first described a disease of plants and animals in parts of Holland which could be controlled by administration of copper. In cattle, goats and sheep the disease, a form of ‘Lecksucht ’, was characterized by anorexia, emaciation, ana...
Metallothioneins are small, high-Cys-containing proteins present in a wide variety of organisms including vertebrates, invertebrates, fungi, cyanobacteria, and higher plants (Hamer, 1986). Metallothioneins play a role in heavy metal detoxification, especially in respect to cadmium, copper, and zinc (Hamer, 1986). Gene disruptions of the bakers’ yeast Cupl locus that encodes a metallothionein an...
according to coates’s (2004, as cited in zhang, 2010) definition of "conversational dominance" (p.111), it refers to the phenomenon of a speaker dominating others in interaction. specifically, it means how a speaker makes use of certain strategies to get the floor and maintain the floor. thus, the amount of talk is the main measurement for the dominance of the conversation. whether a speaker do...
In order to investigate the effect of phytase and copper supplementaion on growth and carcass composition of common carp (Cyprinus carpio L.), in a completely randomized design with 3 ×2 factorial arrangement with three replicates the experimental diets including three levels of phytase 0, 500 and 1000 (FYT) kg-1 and two levels of copper 0 and 15 mg/kg were tested. Diets contained 0.72 percent ...
This study aims to estimate the function of copper consumption using the Johansen approach in time series data, between 1991-2011 in Iran. The literature review of specialized consumption and demand functions shows factors influencing the consumption of copper including copper price variables, aluminum price as a substitute commodity, oil price as a complementary commodity, and industrializatio...
UV-vis spectroscopy was used in a combined in-situ UV-vis/XAFS spectroscopic setup to study the synchrotron radiation effect on aqueous homogeneous copper solutions. Two different systems were studied. In the first study, the focus was on a copper bipyridine-catalyzed oxidation of benzyl alcohol to benzaldehyde with 2,2,6,6- tetramethylpiperidinyl-1-oxy and base as cocatalysts. It was found tha...
in order to determine the copper status and correlation between the ceruloplasmin and copper of serum and among the copper of serum, liver and kidney of slaughtered goats in shahrekord, blood, liver and kidney samples (10 gr) from 100 goats were gathered. the amounts of ceruloplasmin and copper of serum, liver and kidney were measured by sunderman - nomoto and shimadzu atomic absorption method,...
in this study, synthesis of copper nanoparticles and effect of the reaction conditions on the particle size were investigated. the copper nanoparticles were synthesized and stabilized in a narrow temperature range in the presence of polyvinylpyrrolidone under nitrogen atmosphere. reaction temperature and concentration ratio of the reducing agent to the precursor (r/p) as two main conditions i...
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