Copper highest concentration

The highest copper concentrations are contained in white dolomites (4,137 ppm on average) where primary chalcocite and copper and manganese oxides occur. No concentrations of interest in Au, Ag, Pb and Zn were detected in the dolomites. The dolomitic unit shows the highest concentrations in Mn (0.56% to 2.6%). 

Samuelsson (1960) observed that most of the natural copper associated with the cream phase can be removed by washing with water and that the actual fat globule membrane proteins contain approximately 4%o of the total natural copper content. Nevertheless, the value represents the highest concentration of copper per gram of protein in the milk system. Koops (1969) stated that although the amount of natu-... 

M. Data at the highest concentrations of total copper in Newport River water at pH 7.0 and pH 8.0 were also excluded because pCu values approach those predicted for the formation of solid copper hydroxide, i.e., pCu 6.7 at pH 8.0 and 4.7 at pH 7.0. 

Gregus and Klaassen carried out a comparative study of fecal and urinary excretion and tissue distribution of eighteen metals in rats after intravenous injection. Total (fecal + urinary) excretion was relatively rapid (over 50% of the dose in 4 days) for cobalt, silver and manganese between 50 and 20% for copper, thallium, bismuth, lead, cesium, gold, zinc, mercury, selenium and chromium and below 20% for arsenic, cadmium, iron, methylmercury and tin. Feces was the predominant route of excretion for silver, manganese, copper, thallium, lead, zinc, cadmium, iron and methylmercury whereas urine was the predominant route of excretion of cobalt, cesium, gold, selenium, arsenic and tin. Most of the metals reached the highest concentration in liver and kidney. However, there was no... 

The initial drum inventory conducted in 1979 found 17 051 drums on the surface, including 11 628 empty ones. The EPA analyzed the property and creek and found 140 chemical substances. The chemicals found most often and in the highest concentrations were xylene, methyl ethyl ketone, methylene chloride, acetone, phthalates, anthracene, toluene, fluoranthene, alkyl benzene, vinyl chloride, dichloroethylene, and aliphatic acids. Polychlorobi-phenyls were detected in low concentrations and several metals including barium, zinc, copper, strontium, magnesium, and chromium were detected in concentrations exceeding background levels. 

Tamarind seeds appear to be a good source of different mineral elements (4, 6, 9, 14), such as calcium, phosphoms, magnesium and potassium (5, 20) (Table X). Calcium content of tamarind seeds is quite high compared to that of some of the cultivated pulse crops (Kuzayli et al, 1966, cited in 4)). Of all the minerals studied in 4), K is the element in highest concentration, with the values for the trace mineral copper also relatively high (6). 

The average adult human contains 70-100 mg of copper. The highest concentrations (in decreasing order) are in liver, brain, heart, and kidney. Muscle contains about 50%... 

The data in Table 3 speak for themselves. It is interesting to note that liver, brain, heart muscle, and kidney have the highest concentration of copper, in decreasing order. There is a higher concentration of copper in the upper parts of the gut than in the lower parts. Skeletal muscle has a relatively low copper level nevertheless, because of its large mass, muscle as a compartment contains more copper than any other tissue. One-third of the total body copper is contained in muscle. The copper content of... 

Copper is present in all metabolicaily active tissues. The highest concentrations are found in liver and in kidney, with significant amounts in cardiac and skeletal musele and in bone. The liver contains 10% of the total body content of I2(X) (.unol (80 mg). Excess copper is excreted in bile into the gut. and the faecal copper output (12.5 imol/24 h) is the sum of unabsorbed dietary copper and that re-excreted into the gut. 

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