Peculiarities of the LME contract structure give impression that exchange spot prices measure transaction paid by consumers and received producers. This can be misleading. Transaction also include a regional premium account for substantial component full price. In well-supplied markets, premiums cost intermediating warehouses consumers. periods tight demand they reflect urgency consumer require...

the oxidation of ferrous iron (fe2+) in solution using acidithiobacillus ferrooxidans has industrial applications exclusively in the regeneration of ferric iron (fe3+) as an oxidizing agent for the removal of hydrogen sulfide from waste gases, desulfurization of coal, leaching of non-ferrous metallic sulfides and treatment of acid mine drainage. the aim of this investigation was to increase the...

Technological advances in industrial processes have resulted in reduced atmospheric emissions from metal industries all over the globe, but the response of the environment is not well known. The authors studied metal (As, Cd, Cu, Ni, Pb, and Se) accumulation in passerine birds (pied flycatcher, Ficedula hypoleuca, and great tit, Parus major) following almost 20 years of reduced metal emissions ...

This study deals with bioleaching of the low grade uranium ore of Saghand mine in Iran using a mixed culture of mesophilic bacteria (Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans). Experiments were carried out in shaking flask examining the effect of temperature, initial ferrous ion concentration, pulp density and particle size. Variations of ...

THE YEAR 1 9 4 0 was characterized by sharp employment increases in industries producing such durable goods as automobiles, aircraft, ships, machinery, and other ferrous metal products, and by an expansion in construction, arising out of the Nation's need for cantonments, shipways, airports, and armament plants. Industries covered by State unemployment compensation laws participated to a greate...

Antianemic medicament ferrous gluconate, ferrous fumarate, and a Dynabi tablet with a basic iron bearing ingredient were studied with the use of Mössbauer spectroscopy. Room temperature spectra of ferrous gluconate gave clear evidence that the two phases of iron were present: ferrous (Fe2+) as a major one with a contribution at and above 91 a.u.% and ferric (Fe3+) whose contribution was found t...

The advanced nonferrous metal industry is a national strategic emerging industry, and its innovation ability crucial to the transformation development of downstream industries such as aerospace, rail transit, electronic information, automobiles high end industrial value chain. research on evolution characteristics cooperative network beneficial mechanism improving capability industry. Based inv...

The variation in sulfur dioxide emissions from nonferrous metal smelters in the western United States over a 4-year period is compared with the variation in sulfate concentrations in precipitation in the Rocky Mountain states. The data support a linear relation between emissions and sulfate concentration. The geographic separation of emissions sources and precipitation monitors indicates a sulf...