Results 191 to 200 of about 10,485 (217)
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A kinetic model for biological oxidation of ferrous iron byThiobacillus ferrooxidans
Biotechnology and Bioengineering, 1997The kinetics of bacterial oxidation of ferrous iron in the presence of Thiobacillus ferrooxidans cells were studied using an initial-rate method. Measurements of the redox potential of the solution during the oxidation of ferrous iron were used to assess the initial rate of the reaction.
Nemati, M., Webb, C.
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A novel gene encoding a sulfur-regulated outer membrane protein in Thiobacillus ferrooxidans
Journal of Biotechnology, 1999Thiobacillus ferrooxidans is a Gram-negative chemolithotrophic bacterium able to oxidize ferrous iron, elemental sulfur and inorganic sulfur compounds. The oxidation of sulfur by T. ferrooxidans resulted in an expression of some outer membrane proteins (OMPs) at a level higher than that observed during ferrous iron oxidation.
Vincenzo Buonfiglio +4 more
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Microbiological leaching of a low-grade uranium ore byThiobacillus ferrooxidans
European Journal Of Applied Microbiology, 1976The microbiological leaching of low-grade uranium ore has been investigated using a pure strain ofThiobacillus ferrooxidans. It has been shown that only minute quantities of iron are required to achieve a maximum effect on uranium release. The ore sample contained enough iron (3.23%) to produce this effect, consequently, very little influence has been ...
R. Guay, M. Silver, A. E. Torma
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Tn5037, a Tn21-like Mercury Resistance transposon from Thiobacillus ferrooxidans
Russian Journal of Genetics, 2001The 6645-bp mercury resistance transposon of the chemolithotrophic bacterium Thiobacillus ferrooxidanswas cloned and sequenced. This transposon, named Tn5037, belongs to the Tn21branch of the Tn21subgroup, many members of which have been isolated from clinical sources.
E. S. Kalyaeva +5 more
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A novel method of dissolving realgar by immobilized Acidithiobacillus ferrooxidans
International Journal of Mineral Processing, 2015Abstract Due to the toxic and un-dissolvable properties, the medical application of realgar (As4S4) has always been limited for a long time. In this study, a novel method of dissolving realgar by immobilized Acidithiobacillus ferrooxidans (A. ferrooxidans) is introduced. The characterizations of dissolving realgar are carried out by means of SEM, ICP-
Qinjian Xie +10 more
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Molecular characterization of a chemotactic receptor from Leptospirillum ferrooxidans
1999Both indirect and direct forms of mineral attack require that the microorganisms adhere to specific sites on the surface of the minerals which they will oxidize to obtain their energy. This attachment will depend on the sensing by the microorganisms of a dissolved ion concentration gradient present in the immediate vicinity of the solid.
M. Delgado, H. Toledo, C.A. Jerez
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A novel mineral processing by flotation using Thiobacillus ferrooxidans
1999Oxidative leaching of metals by Thiobacillus ferrooxidans has proven useful in mineral processing. Here, we report on a new use for T. ferrooxidans whereby bacterial adhesion is used to remove pyrite from mixtures of sulfide minerals during flotation.
T. Nagaoka, N. Ohmura, H. Saiki
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Arsenopyrite bioleaching by Acidithiobacillus ferrooxidans in a rotating-drum reactor
Minerals Engineering, 2012Abstract A rotating-drum reactor with a gas-sparger of microfiltration ceramic membrane was used for arsenopyrite bioleaching by Acidithiobacillus ferrooxidans . The gas mass transport performance could be improved by adjusting the aeration rate and drum rotation speed, and high bioactivity of bacterial strains could be maintained at high pulp ...
Jian Jin +4 more
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Functional Dissection of a Mercuric Ion Transporter, MerC, fromAcidithiobacillus ferrooxidans
Bioscience, Biotechnology, and Biochemistry, 2005Topological analysis with a phoA gene fusion suggested that Acidithiobacillus ferrooxidans MerC, a mercury transporter, has two periplasmic loops and four transmembrane domains. Cys-23 and Cys-26 of the protein were involved in Hg(2+)-recognition/uptake, but Cys-132 and Cys-137 were not.
Yoshito, Sasaki +4 more
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Microbial Desulfurization of Coals in a Slurry Pipeline Reactor Using. Thiobacillus ferrooxidans
Biotechnology Progress, 1985AbstractMicrobial desulfurization of Illinois #6 and Indiana #3 bituminous coal having a total sulfur content of 2 to 8% has been investigated using acidophilic microorganism, Thiobacillus ferrooxidans, in laboratory shake flash experiments and in a two‐inch pipeline loop.
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