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Results for “Gram-Negative Chemolithotrophic Bacteria”

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At least 19 recordsLinked to original sources
PubMed1976

Nonstaphylococcal bacteria in renal cortical abcess.

Five cases of renal cortical abscess are presented, of which four yielded gram-negative pathogens. Along with a review of the recent literature, this suggests that nonstaphylococcal bacteria are a more common cause of this disease.

Abscess↗
PubMed1975

Iron bacteria of the genus Siderocapsa in mineral waters.

The occurrence of iron bacteria in mineral waters has been under study. It could be shown that Siderocapsa caronata Redlinger 1931 and S. treubii Molisch 1909 are synonymous, as well as S. eusphaera Skuja 1948 and S. major Molisch 1909, and S. botryoides Berger 1949 and S. monoica 1922. Two new species, S. hexagonata and S. quadrata, have been described. A simplified key for determining the species of the genus Sideracapsa is presented.

Gram-Negative Chemolithotrophic Bacteria↗
PubMed1976

Ferric iron reduction by sulfur- and iron-oxidizing bacteria.

Acidophilic bacteria of the genera Thiobacillus and Sulfolobus are able to reduce ferric iron when growing on elemental sulfur as an energy source. It has been previously thought that ferric iron serves as a nonbiological oxidant in the formation of acid mine drainage and in the leaching of ores, but these results suggest that bacterial catalysis may play a significant role in the reactivity of ferric iron.

Acidithiobacillus thiooxidans↗
PubMedDate not supplied

[Sulfobacillus, a new genus of thermophilic sporulating bacteria].

An aerobic facultative thermophilic bacterium was isolated from the ore of the Nikolaev copper-zinc-pyrite deposit in the Eastern Kazakhstan. The bacterium is similar to Thiobacillus ferooxidans in the ability to use various energy subsrates (Fe2+, sulphide minerals and So) and in the acidophilic properties, but differs from it in the thermophilic nature, the structure of a cell wall, the ability to produce spores, and a lower GC content in DNA. Consequently, the organism has been identified as a new species of a new genus, Sulfobacillus thermosulfidooxidans gen. nov., sp. nov. The organism is presumed to play an active role in oxidation of sulphide ores and their warming in deposits.

Culture Media↗
PubMed1990

Effect of organic substrates on biological sulphide oxidation.

Neither acetate nor higher fatty acids and glucose have a significant effect on the biotechnological process for sulphide removal at 20 degrees C, in which sulphide is oxidized to sulphur using oxygen. The oxidation of acetate and propionate with oxygen is mainly dependent on the sulphide and oxygen concentrations in the reactor. The occurrence of Thiothrix filaments in sulphide-removing waste-water treatment systems has been investigated using a fixer-film upflow reactor. The influent of this reactor consisted of anaerobically treated paper-mill waste-water, with a sulphide concentration of 140 mg/l. It was found that sulphide loading rate is the decisive parameter as to whether or not Thiothrix will develop in a sulphide-removing reactor.

Acetates↗
PubMed1977

Comparative lipid composition of heterotrophically and autotrophically grown Sulfolobus acidocaldarius.

Complex lipids from the thermoacidophilic facultative autotroph Sulfolobus acidocaldarius, as well as a strictly autotrophic isolate, were compared between cells grown on yeast extract and elemental sulfur. Lipids from both organisms grown autotrophically were nearly identical. Each contained about 15% neutral lipids, 35% glycolipids, and 50% acidic lipids. Glycolipids and acidic lipids contained C40H82-76-derived glycerol ether residues. Major glycolipids included the glycerol ether analogues of glucosyl galactosyl diglyceride (5%) and glucosyl polyol diglyceride (75%). Acidic lipids were comprised mainly of the glycerol ether analogues of phosphatidyl inositol (7%), inositolphosphoryl glucosyl polyol diglyceride (72%), and a partially characterized sulfate- and phosphate-containing derivative of glucosyl polyol diglyceride (13%). The lipids from cells grown heterotrophically were similar to those from autotrophically grown cells, except that the partially characterized acidic lipid was absent. In addition, the two glycolipids as well as the respective inositolphosphoryl derivatives were each present in nearly equal proportions.

Chromatography, Gas↗
PubMed1978

Physiological and morphological observations on Thiovulum sp.

Cell suspensions of Thiovulum sp., collected from enrichment cultures, were grown, maintained, and harvested for periods up to 7 months. In open-flow cultures run with aerated seawater, a continuous supply of hydrogen sulfide was provided by diffusion through a semipermeable membrane from either a live culture of Desulfovibrio esturaii, neutralized sodium sulfide, or a N2-H2S gas mixture. Attempts to grow Thiovulum in pure culture failed despite variation in concentrations of dissolved oxygen and hydrogen sulfide in stratified as well as in completely mixed systems. Uptake of 14CO2 and some organic compounds by purified cell suspensions was measured, and values were corrected for the activity of heterotrophic as well as autotrophic contaminants as determined in control experiments. Cell populations exhibited maximum uptake activities during formation of the characteristic veils. Substantial uptake of CO2 in air-saturated seawater was coincident with an optimal concentration of hydrogen sulfide of about 1 mM. Glutamate and a selection of vitamins (B12M biotin, and thiamine) did not significantly affect the uptake of CO2. No substantial uptake of carbon from acetate, glutamate, mannitol, and Casamino Acids was found. Within the range of error indicated, the data are consistent with acceptance of a chemolithotrophic nature of Thiovulum.

Acetates↗
PubMedDate not supplied

[Sulfate reduction and the water-soluble organic substances in a flooded petroleum bed].

The paper presents the analytical data for the hydrochemical and microbiological composition of the water in a stratum undergoing changes as a result of artificial flooding. The highest accumulation of biogenic H2S and the carbon of dissolved organic substance was found in diluted bed waters with mineralization of 17.17 g/litre. The composition of the bitumen carbon of dissolved organic substances changed with dilution of the stratum brine. The data thus obtained suggest the existence of an indirect relationship; oxidized dissolved organic substance--the rate of sulphate reduction. The nature of organic substance appearing in the petroleum stratum is discussed.

Gram-Negative Chemolithotrophic Bacteria↗