W953766 土壤硼分馏物对油橄榄和大麦的有效性及其与土壤特性的关系〔刊,英〕/Tsadilas. C. D. …//Plant and Soil. -1994. 162(2). -211～217〔WBTA,1995, 12(1), 808〕W953767 瑞典某些酸性硫酸土壤的形态学、化学、矿物学及肥力〔告...W953766 土壤硼分馏物对油橄榄和大麦的有效性及其与土壤特性的关系〔刊,英〕/Tsadilas. C. D. …//Plant and Soil. -1994. 162(2). -211～217〔WBTA,1995, 12(1), 808〕W953767 瑞典某些酸性硫酸土壤的形态学、化学、矿物学及肥力〔告,英〕/Oborn. L//Reports and Dis-sertations-Swedish University of Agricultural Sci-展开更多
Effects of two typical surfactants, Tween-80 and sodium isobutyl-xanthate (NaIBX), with different concentrations on the growth and sulfur-oxidizing activities of a new strain Acidithiobacillus albertensis BY-05, an ac...Effects of two typical surfactants, Tween-80 and sodium isobutyl-xanthate (NaIBX), with different concentrations on the growth and sulfur-oxidizing activities of a new strain Acidithiobacillus albertensis BY-05, an acidophilic sulfur-oxidizing bacterium, were investigated. The results indicate that both surfactants can enhance the growth and sulfur-oxidizing activities of A. albertensis BY-05 only at some special concentrations, e.g., 10-4-10-8 g/L for NaIBX and lower than 10-8 g/L for Tween-80, but were inhibited and even harmful at higher concentrations. Both surfactants can not be metabolized by A. albertensis BY-05. The contact between the bacteria and the sulfur particles may be dependent upon both the extracellular substance and the surfactants, both of which provide the amphiphilic environment improving the attachment for bacteria to the sulfur particles surface. These data could be significant for enlarging the applications of both A. albertensis BY-05 and some typical surfactants for industrial bioleaching of sulfides minerals.展开更多
Six strains of moderately thermophilic sulfur-oxidizing bacteria were isolated from several different typical environments in China. The identities of the isolates were confirmed by analyses of their 16S rRNA genes, a...Six strains of moderately thermophilic sulfur-oxidizing bacteria were isolated from several different typical environments in China. The identities of the isolates were confirmed by analyses of their 16S rRNA genes, and some key physiological traits. The isolates are Gram negative, rod-shaped bacteria, their optimal temperature and pH value for growth are 45-50℃ and 2.5-3.5 respectively. They are autotrophic and used elemental sulfur, sodium thiosulfate and potassium tetrathionate as electron donor, while a little glucose stimulated their growth. 16S rDNA sequences analysis reveals that the strains are phylogenetically clustered to Acidithiobacillus caldus.展开更多
文摘W953766 土壤硼分馏物对油橄榄和大麦的有效性及其与土壤特性的关系〔刊,英〕/Tsadilas. C. D. …//Plant and Soil. -1994. 162(2). -211～217〔WBTA,1995, 12(1), 808〕W953767 瑞典某些酸性硫酸土壤的形态学、化学、矿物学及肥力〔告,英〕/Oborn. L//Reports and Dis-sertations-Swedish University of Agricultural Sci-
基金Project(2004CB619201) supported by the National Basic Research Program of ChinaProjects(50621063, 50674101) supported by the National Natural Science Foundation of China
文摘Effects of two typical surfactants, Tween-80 and sodium isobutyl-xanthate (NaIBX), with different concentrations on the growth and sulfur-oxidizing activities of a new strain Acidithiobacillus albertensis BY-05, an acidophilic sulfur-oxidizing bacterium, were investigated. The results indicate that both surfactants can enhance the growth and sulfur-oxidizing activities of A. albertensis BY-05 only at some special concentrations, e.g., 10-4-10-8 g/L for NaIBX and lower than 10-8 g/L for Tween-80, but were inhibited and even harmful at higher concentrations. Both surfactants can not be metabolized by A. albertensis BY-05. The contact between the bacteria and the sulfur particles may be dependent upon both the extracellular substance and the surfactants, both of which provide the amphiphilic environment improving the attachment for bacteria to the sulfur particles surface. These data could be significant for enlarging the applications of both A. albertensis BY-05 and some typical surfactants for industrial bioleaching of sulfides minerals.
基金Project (50321402) supported by the National Natural Science Foundation of China Project(2004CB619204) supported by the State Basic Research Development Program of China Project (DY105-02-04-05) supported by the China Ocean Mineral Resources Research and Development Association
文摘Six strains of moderately thermophilic sulfur-oxidizing bacteria were isolated from several different typical environments in China. The identities of the isolates were confirmed by analyses of their 16S rRNA genes, and some key physiological traits. The isolates are Gram negative, rod-shaped bacteria, their optimal temperature and pH value for growth are 45-50℃ and 2.5-3.5 respectively. They are autotrophic and used elemental sulfur, sodium thiosulfate and potassium tetrathionate as electron donor, while a little glucose stimulated their growth. 16S rDNA sequences analysis reveals that the strains are phylogenetically clustered to Acidithiobacillus caldus.
