Oxidation of Arsenite by Pseudomonas Thivervalensis Biology Essay
Arsenite thus exhibits greater biological toxicity. Microbial activity has a strong influence on the oxidation states of arsenic. More than thirty bacterial strains from at least nine genera in the α - β and γ - δ and ε Proteobacteria, as well as the Archaea, are known for their ability to transform inorganic arsenic forms by oxidation or reduction. Gihring, Arsenite Oxidase aox genes from a metal-resistant β-Proteobacterium. Daniel AE Muller, D. Lièvremont, M. Lett. Environmental sciences, biology, chemistry. Journal of Bacteriology. TLDR. R Reverse transcription-PCR data indicated that these genes are organized in an operonic system, Pseudomonas aeruginosa is a Gram-negative environmental and human opportunistic pathogen that is highly adapted to many different environmental conditions. It can cause a wide range of serious infections, including wounds, lungs, urinary tract and systemic infections. The high versatility and pathogenicity of this bacterium is attributed. The synergism between chemical As III oxidation by birnessite and simultaneous birnessite regeneration by Mn-oxidizing Pseudomonas SK allowed complete oxidation of As III, and the oxidation rate increased during the cycle batch test. • The XANES analysis suggested that passivation of the. Competitor Statement: Arsenic is a ubiquitous component in geothermal fluids. Thermophiles represented by Thermus play a crucial role in its transformation into geothermal fluids. In this study, two Thermus tengchongensis strains, named YW, were isolated from arsenic-rich geothermal sources and found different arsenite oxidation behaviors with quantitative determination of arsenite oxidation potential. Quantitative arsenite oxidation in a heterotrophic growth medium was investigated, as well as growth curve analysis. Aerobic. Arsenic-transforming bacterial strains belong to the genus Pseudomonas sp.AK9 KY569424 and were isolated from the middle Ganges plains of Bihar, India. The Pseudomonas sp. AK was able to convert toxic arsenite into a less toxic arsenate. In the present work, the presence of several arsenic resistance genes aoxB was investigated. To gain a deeper insight into the electron transfer mechanisms possibly involved in the bioelectrochemical As III oxidation, cyclic voltammetry CV tests were performed on the inoculated and on the abiotic cells. 2. Regarding the inoculated cells, the CV was performed at the end of the potentiostatic tests shown in,