Results 171 to 180 of about 6,167 (220)
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Sulfur-oxidizing enzyme of Ferrobacillus ferrooxidans (Thiobacillus ferrooxidans)
Canadian Journal of Biochemistry, 1968The sulfur-oxidizing enzyme was purified about 15-fold from sulfur-grown Ferrobacillus ferrooxidans. The enzyme has a pH optimum of 7.8 and requires both elemental sulfur and reduced glutathione (GSH); however, a glutathione–polysulfide complex could also serve as substrate. The Km for GSH was determined to be 2 × 10−3 M.
M, Silver, D G, Lundgren
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Uranium resistance of Thiobacillus ferrooxidans
European Journal of Applied Microbiology and Biotechnology, 1983The toxicity of uranium to several isolates of Thiobacillus ferrooxidans was determined. Plasmid DNA of approx. 13±0.5 megadaltons was detected in four cultures that exhibited the highest resistance to UO2 2+. One isolate, TFI-7, always contained a 13 megadalton plasmid and was always resistant to uranium.
Phyllis A. W. Martin +2 more
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[Thiobacillus ferrooxidans pili].
Mikrobiologiia, 1978The surface structures of Thiobacillus ferrooxidans were studied. When growing on a medium containing elemental sulphur, the cells possess peritrichously located filaments (piles) whose diameter varies from 4.5 to 7.0 nm and length, from 0.7 to 3.0 mcm. The cells of T. ferrooxidans do not have piles on a medium with ferrous iron. The physiological role
L A, Gromova +2 more
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Sulfate sensor using Thiobacillus ferrooxidans
Analytica Chimica Acta, 1997Abstract A novel microbial sensor for sulfate detection has been developed. Thiobacillus ferrooxidans was immobilized on an oxygen electrode and the relationship between the current decrease at the microbial electrode and the sulfate concentration was examined.
Santoshi Sasaki +6 more
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The thiosulfate-oxidizing enzyme of Ferrobacillus ferrooxidans (Thiobacillus ferrooxidans)
Canadian Journal of Biochemistry, 1968The thiosulfate-oxidizing enzyme tetrathionase was purified about 250-fold from sulfur-grown Ferrobacillus ferrooxidans. It reduced 1 mole of ferricyanide per mole of thiosulfate oxidized, with the production of 0.5 mole of tetrathionate. The pH optimum was 5.0 with acetate buffer, and the Km for thiosulfate was determined to be 9 × 10−4 M. Inhibition
M, Silver, D G, Lundgren
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Direct zinc sulphide bioleaching by Thiobacillus ferrooxidans and Thiobacillus thiooxidans
Biotechnology Letters, 1994Direct bioleaching (no iron(II) present) by Thiobacillus ferrooxidans mainly occurs on the surface of the very insoluble sulphides but is more important in solution when the sulphides are more soluble. In this case, Thiobacillus thiooxidans, normally not able to leach directly insoluble sulphides, has an effective leaching action.
M. Pistorio +3 more
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Combined degradation of covellite by Thiobacillus thiooxidans and Thiobacillus ferrooxidans
Biotechnology Letters, 1996In the presence of iron, which is always associated with natural sulphide ores, the percentages of copper dissolution in the bioleaching of covellite were 34 and 45 % when Thiobacillus thiooxidans and Thiobacillus ferrooxidans were used together and when an indirect bioleaching with attached bacteria was performed respectively.
G. Curutchet, P. Tedesco, E. Donati
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Reduction of dichromate by Thiobacillus ferrooxidans
Biotechnology Letters, 1996Chromium(VI) was reduced by Thiobacillus ferrooxidans grown with elemental sulphur as the sole energy source. Chromium(VI) reduction (as high as 2000 μM), was due to the presence of sulphite and thiosulphate, among others with high reducing power which was generated during the sulphur oxidation by the bacteria.
F. Sisti, P. Allegretti, E. Donati
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Biochemical rust removal by Thiobacillus ferrooxidans
European Journal of Applied Microbiology and Biotechnology, 1981Biochemical removal of rust from iron surfaces has been investigated. By immersing a rusted iron plate in the culture medium of an iron-oxidizing bacterium, Thiobacillus ferrooxidans, iron adjacent to the rust was dissolved and the rust was peeled off. Since the amount of dissolved iron per unit iron plate surface area correlated with the concentration
Kuniki Kino +3 more
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Biosorption of Cu by Thiobacillus ferrooxidans
Bioprocess Engineering, 1998Current technologies for removal and recovery of both toxic and industrial interest metals usually produce wastes with high concentrations of those substances. They are an important source of environmental pollution, specially when they contain heavy metals.
A. Ruiz-Manríquez +3 more
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