News Column

Findings from Osaka University Has Provided New Information about Pseudomonas

June 17, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Proteobacteria have been published. According to news reporting from Osaka, Japan, by NewsRx journalists, research stated, "Bacteria capable of synthesizing CdSe from selenite and cadmium ion were enriched from a soil sample. After repeated transfer of the soil-derived bacterial cultures to a new medium containing selenite and cadmium ion 42 times (during 360 days), an enrichment culture that can simultaneously remove selenite and cadmium ion (1 mM each) from the liquid phase was obtained."

The news correspondents obtained a quote from the research from Osaka University, "The culture's color became reddish-brown, indicating CdSe nanoparticle production, as confirmed by energy-dispersive x-ray spectra (EDS). As a result of isolation operations, the bacterium that was the most responsible for synthesizing CdSe, named Pseudomonas sp. RB, was obtained. Transmission electron microscopy and EDS revealed that this strain accumulated nanoparticles (10-20 nm) consisting of selenium and cadmium inside and on the cells when cultivated in the same medium for the enrichment culture. This report is the first describing isolation of a selenite-reducing and cadmium-resistant bacterium."

According to the news reporters, the research concluded: "It is useful for CdSe nanoparticle synthesis in the simple one-vessel operation."

For more information on this research see: Isolation of a selenite-reducing and cadmium-resistant bacterium Pseudomonas sp. strain RB for microbial synthesis of CdSe nanoparticles. Journal of Bioscience and Bioengineering, 2014;117(5):576-81. (Elsevier -; Journal of Bioscience and Bioengineering -

Our news journalists report that additional information may be obtained by contacting H. Ayano, Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan. Additional authors for this research include M. Miyake, K. Terasawa, M. Kuroda, S. Soda, T. Sakaguchi and M. Ike (see also Proteobacteria).

Keywords for this news article include: Asia, Osaka, Japan, Nanoparticle, Nanotechnology, Pseudomonadaceae, Gammaproteobacteria, Emerging Technologies, Gram Negative Bacteria, Gram Negative Aerobic Rods and Cocci.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Life Science Weekly

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