the nutrient elements uptake in many of soils, is a problem because of high ph and plenty of calcium ions in them. some of these elements are phosphorus and microelements. it is possible to increase absorption of these nutrient elements by addition of sulfur in soil and biological oxidation. the rate of this reaction is very slow and thiobacillus bacteria are the most important oxidators of sul...

Thermothrix thiopara did not appear to be stressed at high temperature (72 degrees C). Both the actual and theoretical yields were higher than those of analogous mesophilic sulfur bacteria, and the specific growth rate (mu(max)) was more rapid than that of most autotrophs. The specific growth rate (0.58 h), specific maintenance rate (0.11 h), actual molar growth yield at mu(max) (Y(max) = 16 g ...

Thiobacillus ferrooxidans is a gram-negative, highly acidophilic (pH 1.5 to 2.0), autotrophic bacterium that obtains its energy through the oxidation of ferrous iron or reduced inorganic sulfur compounds. It is usually dominant in the mixed bacterial populations that are used industrially for the extraction of metals such as copper and uranium from their ores. More recently, these bacterial con...

In acetate-limited chemostat cultures started with single-colony cultures of Thiobacillus versutus, a mutant appeared after approximately 85 volume changes. The inhomogeneity of the culture was detected by the development of two different types of colonies on agar plates. When a pure culture of the mutant was grown in a chemostat, parent colonies appeared after almost the same period of time. E...

The obligately autotrophic acidophile Thiobacillus ferrooxidans was grown on elemental sulfur in anaerobic batch cultures, using ferric iron as an electron acceptor. During anaerobic growth, ferric iron present in the growth media was quantitatively reduced to ferrous iron. The doubling time in anaerobic cultures was approximately 24 h. Anaerobic growth did not occur in the absence of elemental...

A. J. Smith, J. London, and R. Y. Stanier (J. Bacteriol. 94:972, 1967) reported that a number of obligate autotrophs, including Thiobacillus thiooxidans and T. thioparus, lacked reduced nicotinamide adenine dinucleotide (NADH2) oxidase activity, although this activity was readily detected in the facultative autotrophs T. intermedius and Hydrogenomonas eutropha. They suggested that the absence o...