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Unternehmenskonzentrationen im Weltbergbau warfen die Frage auf, ob die bisher problemlose Rohstoffversorgung der deutschen Wirtschaft über die Weltmärkte und ohne wesentliche eigene Rohstoffengagements im Ausland gefährdet werden könnte. In der Studie werden die Märkte von zehn...
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extracted as by-product of copper and nickel. A multiregional input–output (MRIO) model for 20 world regions and 163 commodities …, and constant background import shares. A dynamic stock model of regional reserves for seven different types of copper … copper and nickel ore flows would be sufficient to match global cobalt demand. When simulating a hypothetical sudden supply …
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This study was carried out to determine the toxicity of copper sulphate to African Catfish (Clarias gariepinus). The … toxicant (copper sulphate) was introduced at varying concentrations of 10g/l, 20g/l, 30g/l and 40g/l in the first range …/l. From the definitive test, the Median Lethal Concentration of copper sulphate to Clarias gariepinus was found to be 0.175g …
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