uv/tio2 photocatalysis of chelated copper in aqueous solutions has been performed starting from cu(ii)-tartaric acid, cu(ii)-citric acid, cu(ii)-edta and cu(ii)-dtpa,in the presence of oxygen and at acidic ph. the photocatalytic reaction obeys first-order kinetic equation. the influence of cu(ii) on photocatalytic oxidation of organic ligands and how the various organics will affect the treatmen...

An experiment was conducted to determine the effects of dietary Cu on performance, carcass characteristics, and muscle fatty acid composition in meat goats. Thirty five Jianyang Big-ear goat (JYB) kids (average BW 20.3 ± 0.6 kg and age 3 to 4 mo) were stratified by weight and randomly assigned to 1 of 7 experimental treatments (n = 5 goats per treatment). Treatments consisted of: 1) control (no...

in order to investigate the soil magnetic susceptibility and its relationship with the concentration of selected heavy metals and soil properties, a total of 158 composite surface soil samples (0-5 cm) were taken from an area of about 700 km2. locations of the sampling sites were determined using a gps and their land uses were recorded. the in situ magnetic susceptibility for the topsoil sample...

1. The effects of incorporation of copper sulphate supplying 250 mg copper/kg semi-purified diet with graded amounts of calcium pantothenate (CaPa) were studied in chicks. 2. When the doses of CaPa were marginally adequate or less the Cu supplementation induced severe signs of pantothenic acid (PaA) deficiency. 3. Livers of the Cu-treated birds given low doses of PaA had lower concentrations of...

copper (cu) is an essential element required by all living organisms, since at least 30 enzymes are known to use cu as a cofactor. cu is also toxic in excess and liver and gills are known to be target organs for it. in the present study, 240 siberian sturgeon juvenile (with initial weight 29.2 ± 3.1 g and initial length 21.8 ± 1.4 cm) were randomly distributed in 12 fiberglass tanks at 4 differ...

Concentration and daily intake (DI) of heavy metals [lead (Pb), chromium (Cr), cadmium (Cd) and copper (Cu)] were investigated in four common edible vegetables including coriander, dill, radish root and radish leaf grown at peri-urban sites in Sanandaj, Iran. A total of 120 composite samples of vegetables were taken from ten vegetable farms during six months from May to October 2012. Inductivel...

Bleomycin was observed to inhibit DNA and protein syntheses in intact Escherichia coli, Ehrlich carcinoma and HeLa cells. DNA synthesis was more profoundly affected than protein synthesis. RNA synthesis was not significantly suppressed by the antibiotic. The activity of bleomycin was highly dependent on the number of cells and on the concentration of phosphate in the medium, being more pronounc...

A simple and sensitive extraction-fluorimetric method for the determination of copper is reported. The 1,7-diaza-15-crown-5-copper-rose Bengal (DA15C5-Cu-RB) ternary complex is quantitatively extracted into chloroform, diluted with ammoniacal acetone and its fluorescence intensity is measured at 570 nm with excitation at 540 nm. A linear calibration graph was obtained over the copper concen...

background: the trace element copper has been identified as a highly toxic element for sperm. it is known to affect sperm motility in humans and experimental implantation of copper in the epididymis vas deferens and scrotum of mammals has been demonstrated to affect fertility detrimentally. objective: sperm concentration motility vitality and morphology are parameters used to evaluate potential...