Microbe grows by reducing arsenic

Arsenic-Microbe-Mineral Interactions in Mining-Affected Environments

The toxic element arsenic (As) occurs widely in solid and liquid mine wastes. Aqueous forms of arsenic are taken up in As-bearing sulfides, arsenides, sulfosalts, oxides, oxyhydroxides, Fe-oxides, -hydroxides, -oxyhydroxides and -sulfates, and Fe-, Ca-Feand other arsenates. Although a considerable body of research has demonstrated that microbes play a significant role in the precipitation and d...

Nuclear medicine usage grows, led by PET.

Led by PET A n estimated 1,129,900 clinical PET studies were performed in the United States in 2005, according to a report released in August by IMV Medical Information Division, a market research and consulting firm in Des Plains, IL. These studies were performed in 1,725 hospital and nonhospital sites, using dedicated PET/CT or PET units, mobile units, or nuclear medicine cameras with coincid...

Dissolution of Arsenic Minerals Mediated by Dissimilatory Arsenate Reducing Bacteria: Estimation of the Physiological Potential for Arsenic Mobilization

The aim of this study was characterization of the isolated dissimilatory arsenate reducing bacteria in the context of their potential for arsenic removal from primary arsenic minerals through reductive dissolution. Four strains, Shewanella sp. OM1, Pseudomonas sp. OM2, Aeromonas sp. OM4, and Serratia sp. OM17, capable of anaerobic growth with As (V) reduction, were isolated from microbial mats ...

Exposure to inorganic arsenic can lead to gut microbe perturbations and hepatocellular carcinoma

Arsenic is a carcinogenic environmental factor found in food and drinking water around the world. The mechanisms in which arsenic alters homeostasis are not fully understood. Over the past few decades, light has been shed on varying mechanisms in which arsenic induces cancer. Such mechanisms include gut microbe perturbations, genotoxic effects, and epigenetic modification. Gut microbe perturbat...

Why Government Grows (and Grows) in a Democracy