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Microbial Geochemistry of Yumthang Hot Water Spring, Sikkim Special Reference to Sulfide Nanoparticles

Amrita Kumari Panda1, Satpal Singh Bisht1, Mahendra Rana2 and Bodh Raj Kaushal1

1. Department of Zoology, Kumaun University, Nainital, Uttarakhand, India

2. Department of Pharmaceutical Sciences, Kumaun University,Nainital, Uttarakhand, India


Abstract: The rapidly developing field of microbial geochemistry (MG) is a sub-set of the broader disciplines of geo-biology and bio-geochemistry. Microbial geochemistry is specifically focused on combining chemical, biological and geological perspectives together to characterize the role of microbes in environmental and geological processes. Analyzing genomes and other biomolecules within environmental samples provide new vistas of microbial geochemistry. Omics approaches provide entirely new perspectives on biogeochemistry especially to determine which organisms responsible for various specific biogeochemical processes. Microbial metabolism plays a vital role in controlling the details of geochemical cycling of specific elements. The abiotic reduction of sulfate to sulfide at low temperatures is a very slow chemical process; thus, the observation of significant fluxes of sulfide at lower temperatures of Yumthag hot spring, Sikkim is strong evidence that microbial metabolism is responsible for sulfate-reduction. The hypothesis of the present study is that the inorganic sulfide nanoparticles with well-defined chemical composition, size and morphology can be synthesized by using different microbial consortia present in this hot spring water. This hypothesis can be an addition to the scientific knowledge, fundamental research and technical applications as sulfide nanoparticles attracted great attention as quantum-dot fluorescent biomarkers and cell labeling agents.

Key words: Microbial geochemistry, hot spring, sulfide nanoparticle.
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