scholarly journals Evidence For a Four-Sulphur Intermediate in Thiosulphate Oxidation by Thiobacillus X

1964 ◽  
Vol 17 (2) ◽  
pp. 577 ◽  
Author(s):  
PA Trudinger
Keyword(s):  
Autotrophic Bacteria ◽  
Thiosulphate Oxidation

The autotrophic bacteria, Thiobacillus spp., oxidize thiosulphate to sulphate but the mechanism of this reaction is obscure (see Vishniac and Trodinger 1962). The suggestion that tetrathionate is an intermediate (Tamiya, Raga, and Huzisige 1941; Vishniac and Santer 1957; Jones and Happold 1961) has been contested by Ostrowski and Krawczyk (1957) and by Peck (1960), who have proposed that a scission of the thiosulphate molecule takes place prior to oxidation.

scholarly journals THE PRESENCE OF AN ENDOGENOUS RESPIRATION IN THE AUTOTROPHIC BACTERIA

1942 ◽  
Vol 25 (4) ◽  
pp. 617-622 ◽  
Author(s):  
K. G. Vogler
Keyword(s):  
Oxygen Uptake ◽  
Organic Materials ◽  
Endogenous Respiration ◽  
Thiobacillus Thiooxidans ◽  
Autotrophic Bacteria ◽  
Autotrophic Bacterium

It is shown that there exists in the autotrophic bacterium Thiobacillus thiooxidans a measurable oxygen uptake in the absence of the specific nutrient (sulfur). This respiration is shown to be due to the utilization of organic materials which must have been previously synthesized by the chemosynthetic process, providing evidence that autotrophic bacteria contain a dissimilatory process which involves the breakdown of organic materials and furnishes energy for the maintenance of the cell during periods in which the specific nutrient is absent. This is entirely in accord with the work of Bömeke (1939), who provided similar types of proof for Nitrosomonas and Nitrobacter. One may conclude, therefore, that autotrophic bacteria possess an endogenous respiration which involves the utilization of previously synthesized organic materials.

Physiology and biochemistry of autotrophic bacteria

1987 ◽  
Vol 53 (1) ◽  
pp. 3-14 ◽  
Author(s):  
G. A. Codd ◽  
J. G. Kuenen
Keyword(s):  
Autotrophic Bacteria ◽  
Physiology And Biochemistry

Perchlorate Reduction by Autotrophic Bacteria Attached to Zerovalent Iron in a Flow-Through Reactor

2007 ◽  
Vol 41 (3) ◽  
pp. 990-997 ◽  
Author(s):  
Xueyuan Yu ◽  
Christopher Amrhein ◽  
Marc A. Deshusses ◽  
Mark R. Matsumoto
Keyword(s):  
Zerovalent Iron ◽  
Perchlorate Reduction ◽  
Autotrophic Bacteria ◽  
Flow Through

Optimizing the Step-Feed Ratio and Modeling the Effluents of Aerobic Tank with ASM1 in ECOSUNIDE Process

2012 ◽  
Vol 178-181 ◽  
pp. 526-530
Author(s):  
Ruo Gu Li ◽  
Yan Qiu Zhang
Keyword(s):  
Organic Matter ◽  
Activated Sludge ◽  
Ammonia Nitrogen ◽  
Feed Ratio ◽  
Optimum Ratio ◽  
Matlab Simulink ◽  
Activated Sludge Model ◽  
Model Based ◽  
Autotrophic Bacteria ◽  
Optimum Model

The step feed model based on the Activated Sludge Model No.1 (ASM1) and the optimum model of the ammonia nitrogen (SNH) removal in wastewater were established. Four aeration tanks under the different step feed ratios were simulated by Matlab Simulink. The results show that single-feeding is conducive to the removal of readily biodegradable substrate (SS) and the growth of heterotrophic organisms (XBH), and to lower the biodegradable substrate (XS) at the same time. The SS, XS, and SNH concentrations are 1.36, 5.98, and 3.02 mg/L respectively in effluent. However, the step-feeding is conducive to the SNH removal, and the autotrophic bacteria (XBA) growth. Under the step feed ratio (25/25/25/25%), the SS, XS, and SNH concentrations are 2.64, 10.79, and 2.61 mg/L respectively. Under the optimum ratio (28.7/23.6/20.4/27.2%), step-feeding could further facilitate the removal of SNH and hinder the removal of organic matter, their concentrations are 2.70, 10.98, and 2.47 mg/L respectively.

Absence of glucokinase in Methanomonas sp. as a cause for their inability to grow on glucose

1972 ◽  
Vol 18 (12) ◽  
pp. 1907-1913 ◽  
Author(s):  
Kei Amemiya
Keyword(s):  
Phosphate Esters ◽  
Resting Cells ◽  
Obligate Methylotroph ◽  
Enzymatic Assays ◽  
Autotrophic Bacteria ◽  
Toxic Product ◽  
A Cell ◽  
Flow Through ◽  
Glucose 6 Phosphate Dehydrogenase ◽  
Autotrophic Bacterium

Many obligate autotrophic bacteria can be grown on glucose using a dialysis flow-through system. Methanomonas methanooxidans, an obligate methylotroph, exhibits many of the properties of an obligate autotrophic bacterium but we have been unable to grow it on glucose using dialysis. In the obligate autotrophic bacteria, the dialysis procedure seems to be removing a toxic product of glucose metabolism but this does not seem to be the case with the methylotroph. Enzymatic assays on a cell-free extract from methane-grown or methane plus glucose-grown cells showed only phosphoglucoisomerase activity, while glucokinase and glucose-6-phosphate dehydrogenase activity were not detected. Studies with resting cells showed that glucose was not oxidized, although the phosphate esters of glucose, fructose, ribose, and gluconate were oxidized. CO2 fixation occurred only in the presence of glucose-6-phosphate. The rate of oxygen consumed and CO2 fixed on glucose-6-phosphate were almost identical with that when methanol was used as the substrate. When the phosphate esters of glucose, fructose, and ribose were used as the sole energy source, only glucose-6-phosphate supported growth to any extent; in fact, the amount of growth was essentially the same as that obtained with methanol. The results from this study suggest that the inability of this organism to grow on glucose may be due to the absence of adequate glucokinase.

Three-dimensional multi-species mathematical model of the aerobic granulation process based on cellular automata theory

2018 ◽  
Vol 77 (12) ◽  
pp. 2761-2771
Author(s):  
Guoqiang Zheng ◽  
Kuizu Su ◽  
Shuai Zhang ◽  
Yulan Wang ◽  
Weihong Wang
Keyword(s):  
Mathematical Model ◽  
Spatial Distribution ◽  
Cellular Automata ◽  
Three Dimensional ◽  
Granular Sludge ◽  
Automata Theory ◽  
Aerobic Granular Sludge ◽  
Granulation Process ◽  
Autotrophic Bacteria ◽  
Degrading Bacteria

Abstract Aerobic granular sludge is a kind of microbial polymer formed by self-immobilization under aerobic conditions. It has been widely studied because of its promising application in wastewater treatment. However, the granulation process of aerobic sludge is still a key factor affecting its practical application. In this paper, a three-dimensional (3D) multi-species mathematical model of aerobic granular sludge was constructed using the cellular automata (CA) theory. The growth process of aerobic granular sludge and its spatial distribution of microorganisms were studied under different conditions. The simulation results show that the aerobic granules were smaller under high shear stress and that the autotrophic bacterial content of the granular sludge interior was higher. However, the higher the dissolved oxygen concentration, the larger the size of granular sludge and the higher the content of autotrophic bacteria in the interior of the granular sludge. In addition, inhibition of toxic substances made the aerobic granule size increase more slowly, and the spatial distribution of the autotrophic bacteria and the toxic-substance-degrading bacteria were mainly located in the outer layer, with the heterotrophic bacteria mainly existing in the interior of the granular sludge.

Interactions of the metal tolerant heterotrophic microorganisms and iron oxidizing autotrophic bacteria from sulphidic mine environment during bioleaching experiments

2016 ◽  
Vol 172 ◽  
pp. 151-161 ◽  
Author(s):  
Sanja Jeremic ◽  
Vladimir P. Beškoski ◽  
Lidija Djokic ◽  
Branka Vasiljevic ◽  
Miroslav M. Vrvić ◽  
...  
Keyword(s):  
Mine Environment ◽  
Autotrophic Bacteria ◽  
Heterotrophic Microorganisms

Acidophilic Microorganisms from Geothermal Copahue Volcano System. Assessment of Biotechnological Applications

2009 ◽  
Vol 71-73 ◽  
pp. 87-91 ◽  
Author(s):  
P. Chiacchiarini ◽  
L. Lavalle ◽  
Alejandra Giaveno ◽  
Edgardo R. Donati
Keyword(s):  
Hot Springs ◽  
Heterotrophic Bacteria ◽  
Extreme Environment ◽  
Acidithiobacillus Thiooxidans ◽  
Biotechnological Applications ◽  
Acidophilic Microorganisms ◽  
Autotrophic Bacteria ◽  
Physiological Properties ◽  
Biological Studies ◽  
System Assessment

This work presents an overview of the physicochemical and biological studies carried out along Rio Agrio and in different hot springs belonging to the geothermal Copahue volcano system, in Neuquén Argentina. This is an extreme environment characterized by wide ranges of temperature, pH (<1 to 8) and heavy metals concentration. In these extreme conditions chemolitho-autotrophic bacteria, archaea, heterotrophic bacteria, yeasts and filamentous fungi were detected. Members of Leptospirillum ferrooxidans, Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Acidianus spp., among others, were successfully cultivated and physiological properties of different isolates were determined. Additionally, bioleaching and biooxidation of regional ores were carried out using mixed native cultures.

Sign in / Sign up

Export Citation Format

Share Document