Results 181 to 190 of about 10,485 (217)

A Novel Mineral Flotation Process Using Thiobacillus ferrooxidans

Applied and Environmental Microbiology, 1999
ABSTRACT Oxidative leaching of metals by Thiobacillus ferrooxidans has proven useful in mineral processing. Here, we report on a new use for T. ferrooxidans , in which bacterial adhesion is used to remove pyrite from mixtures of sulfide minerals during flotation.
T, Nagaoka, N, Ohmura, H, Saiki
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Comparative genomic analysis ofAcidithiobacillus ferrooxidansstrains using theA. ferrooxidansATCC 23270 whole-genome oligonucleotide microarray

Canadian Journal of Microbiology, 2009
Acidithiobacillus ferrooxidans is an important microorganism used in biomining operations for metal recovery. Whole-genomic diversity analysis based on the oligonucleotide microarray was used to analyze the gene content of 12 strains of A. ferrooxidans purified from various mining areas in China. Among the 3100 open reading frames (ORFs) on the slides,
Hailang, Luo, Li, Shen, Huaqun, Yin, Qian, Li, Qijiong, Chen, Yanjie, Luo, Liqin, Liao, Guanzhou, Qiu, Xueduan, Liu   +8 more
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Identification of a gene encoding a tetrathionate hydrolase in Acidithiobacillus ferrooxidans

Journal of Biotechnology, 2007
Tetrathionate is one of the most important intermediates in dissimilatory sulfur oxidation and can itself be utilized as a sole energy source by some sulfur-oxidizing microorganisms. Tetrathionate hydrolase (4THase) plays a significant role in tetrathionate oxidation and should catalyze the initial step in the oxidative dissimilation when sulfur ...
Tadayoshi, Kanao, Kazuo, Kamimura, Tsuyoshi, Sugio   +2 more
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Microbiological leaching of a chalcopyrite concentrate by Thiobacillus ferrooxidans

Biotechnology and Bioengineering, 1976
AbstractThe microbiological leaching of a chalcopyrite concentrate has been investigated using a pure strain of Thiobacillus ferrooxidans. The optimum leaching conditions regarding pH, temperature, and pulp density were found to be 2.3, 35°C, and 22%, respectively. The energy of activation was calculated to be 16.7 kcal/mol.
Hiromichi Sakaguchi, Marvin Silver, Arpad E. Torma   +2 more
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Chalcopyrite bioleaching by A. ferrooxidans and surface passivation

2011 International Conference on Remote Sensing, Environment and Transportation Engineering, 2011
Based on the fact that the primary copper sulfide bioleaching has long leaching time and low leaching rate and has not been used in industry, through selective breeding, domesticated species leaching good using the scanning electron microscopy. The chalcopyrite bioleaching by A. ferrooxidans was studied.
null Guanghua Ai, null Xiuxiang Tao, null Xinyang Yu, Rongbo Shu   +3 more
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Existence of a tungsten-binding protein in Acidithiobacillus ferrooxidans AP19-3

Journal of Bioscience and Bioengineering, 2004
A tungsten-binding protein was purified from a plasma membrane preparation of the iron-oxidizing bacterium, Acidithiobacillus ferrooxidans AP19-3 in an electrophoretically homogenous state. The protein was composed of two subunits with apparent molecular masses of 12 and 20.7 kDa. The molecular mass of the native protein was estimated to be 26.4 kDa in
Tsuyoshi, Sugio, Hiroyuki, Kuwano, Yoshiko, Hamago, Atsunori, Negishi, Terunobu, Maeda, Fumiaki, Takeuchi, Kazuo, Kamimura   +6 more
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A structured model forThiobacillus ferrooxidans growth on ferrous iron

Biotechnology and Bioengineering, 1997
A structured model for Thiobacillus ferrooxidans growth dependence on ferrous and ferric iron, arsenic, oxygen, carbon dioxide, pH, and temperature is presented. A new kinetic mechanism for ferrous oxidation by T. ferrooxidans is introduced. Data from several earlier experimental studies of T. ferroaxidans growth are used for model development.
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Cadmium Tolerance and Uptake by a Thiobacillus Ferrooxidans Biomass

Environmental Technology, 1997
A non-growing living biomass of the acidophilic bacterium Thiobacillus ferrooxidans exhibited a high cadmium uptake capacity dependent on pH, on the physiological state and on the nature of the biomass. Thus an uptake (0.21 g cadmium g−1 dry weight) was obtained at pH 1.6 with a non adapted cadmium biomass, harvested in the end of the exponential phase
F. Baillet, J. P. Magnin, A. Cheruy, P. Ozil   +3 more
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A comparative study of characteristic properties ofThiobacillus ferrooxidans strains

Folia Microbiologica, 1992
Several cultures ofThiobacillus ferrooxidans were purified by isolation of single colonies and simple physiological and biochemical properties of the purified cultures, such as colony morphology, kinetics of ferrous ion oxidation, growth on elemental sulfur and thiosulfate, oxidation of ferrous ion by growing cells in the presence of organic compounds ...
S. Bhattacharyya, A. Das, B. K. Chakrabarti, P. C. Banerjee   +3 more
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A trickle bed reactor for ferrous sulphate oxidation using Thiobacillus ferrooxidans

Biotechnology Techniques, 1994
A trickle bed reactor was used to improve ferrous sulphate oxidation rate with Thiobacillus ferrooxidans immobilised in BSPs (Biomass Support Particles). A maximum iron(II) oxidation rate of 4.4 gL−1h−1 was observed at a dilution rate D = 0.9 h−1.
JENSEN, AB, Webb, Colin
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