منابع مشابه
Double Ore Extensions versus Iterated Ore Extensions
Motivated by the construction of new examples of Artin-Schelter regular algebras of global dimension four, J.J.Zhang and J.Zhang (2008) introduced an algebra extension AP [y1, y2;σ, δ, τ ] of A, which they called a double Ore extension. This construction seems to be similar to that of a two-step iterated Ore extension over A. The aim of this paper is to describe those double Ore extensions whic...
متن کاملEconomic Opportunities for the Exploitation of Copper Ore in the Romanian Carpathians
I. Bostan, Al. I. Cuza University, Faculty of Economics and Business Administration, Iasi, Romania. This paper is a synthetic analysis of the Romanian approach of an important underground resource, namely copper ore deposits. Certain elements of the international context have been introduced, highlighting the appreciation of the price of copper, as a result of increased demand from countries wi...
متن کاملBacterial consortium for copper extraction from sulphide ore consisting mainly of chalcopyrite
The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite. The major native bacterial species involved in the bioleaching of sulphide ore (Acidithiobacillus ferrooxidans, Acidithiobacillus t...
متن کاملUse of Bioreactors in the Leaching of an Oxidized Copper Ore
−− Copper recoveries using two methodologies of acid leaching of a low-grade ore are reported in this work. The ore, abounding in oxidized species, was from Barda González reservoir in Neuquén province, Argentina. In the first methodology, cells of Acidithiobacillus thiooxidans were inoculated into a column containing the ore and sulfur as energy source. In the second one, a bioreactor with imm...
متن کاملA New Heterotrophic Strain for Bioleaching of Low Grade Complex Copper Ore
A new heterotrophic strain, named Providencia sp. JAT-1, was isolated and used in bioleaching of low-grade complex copper ore. The strain uses sodium citrate as a carbon source and urea as a nitrogen source to produce ammonia. The optimal growth condition of the strain is 30 ̋C, initial pH 8, sodium citrate 10 g/L and urea 20 g/L, under which the cell density and ammonia concentration in the me...
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ژورنال
عنوان ژورنال: Journal of Industrial & Engineering Chemistry
سال: 1917
ISSN: 0095-9014,1943-2968
DOI: 10.1021/ie50094a713