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The Ecology of Arsenic
This work reviews what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature and investigates their role in aquifers.
Biogeochemical aspects of atmospheric methane
Methane is the most abundant organic chemical in Earth's atmosphere, and its concentration is increasing with time, as a variety of independent measurements have shown. Photochemical reactions
Arsenic and selenium in microbial metabolism.
This review highlights recent advances in ecology, biochemistry, and molecular biology and provides a prelude to the impact of genomics studies.
Use of “Specific” Inhibitors in Biogeochemistry and Microbial Ecology
The term “specific inhibitor” has been applied to these types of compounds when they are used to probe the functions of mixed populations of microorganisms, providing powerful experimental tools for investigating the activity and function of certain types of micro organisms in natural samples.
Bacterial respiration of arsenic and selenium.
The detection of arsenate and selenate respiring bacteria in numerous pristine and contaminated environments and their rapid appearance in enrichment culture suggest that they are widespread and metabolically active in nature.
Bacillus arsenicoselenatis, sp. nov., and Bacillus selenitireducens, sp. nov.: two haloalkaliphiles from Mono Lake, California that respire oxyanions of selenium and arsenic
Two gram-positive anaerobic bacteria were isolated from the anoxic muds of Mono Lake, California, an alkaline, hypersaline, arsenic-rich water body and demonstrated weak growth as a microaerophile and was also capable of fermentative growth on glucose, while strain E1H is a strict anaerobe.
A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus
A bacterium is described, isolated from Mono Lake, California, that is able to substitute arsenic for phosphorus to sustain its growth and exchange of one of the major bio-elements may have profound evolutionary and geochemical importance.
Alkalilimnicola ehrlichii sp. nov., a novel, arsenite-oxidizing haloalkaliphilic gammaproteobacterium capable of chemoautotrophic or heterotrophic growth with nitrate or oxygen as the electron
On the basis of physiological characteristics and DNA-DNA hybridization data, it is suggested that strain MLHE-1(T) represents a novel species within the genus Alkalilimnicola for which the name Alkalspirillum mobile ehrlichii is proposed.
Structural and Spectral Features of Selenium Nanospheres Produced by Se-Respiring Bacteria
Large differences in the optical properties (UV-visible absorption and Raman spectra) of purified extracellular nanospheres produced in this manner by the three different bacterial species differed substantially from those of amorphous Se(0) formed by chemical oxidation of H2Se and of black, vitreous Se(*) formed chemically by reduction of selenite with ascorbate.