| Surface Chemistry of Thiobacillus ferrooxidans Relevant to Adhesion on Mineral Surfaces. | |
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MedLine Citation:
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PMID: 16349107 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Thiobacillus ferrooxidans cells grown on sulfur, pyrite, and chalcopyrite exhibit greater hydrophobicity than ferrous ion-grown cells. The isoelectric points of sulfur-, pyrite-, and chalcopyrite-grown cells were observed to be at a pH higher than that for ferrous ion-grown cells. Microbe-mineral interactions result in change in the surface chemistry of the organism as well as that of the minerals with which it has interacted. Sulfur, pyrite, and chalcopyrite after interaction with T. ferrooxidans exhibited a significant shift in their isoelectric points from the initial values exhibited by uninteracted minerals. With antibodies raised against sulfur-grown T. ferrooxidans, pyrite- and chalcopyrite-grown cells showed immunoreactivity, whereas ferrous ion-grown cells failed to do so. Fourier transform infrared spectroscopy of sulfur-grown cells suggested that a proteinaceous new cell surface appendage synthesized in mineral-grown cells brings about adhesion to the solid mineral substrates. Such an appendage was found to be absent in ferrous ion-grown cells as it is not required during growth in liquid substrates. |
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Authors:
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P Devasia; K A Natarajan; D N Sathyanarayana; G R Rao |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Applied and environmental microbiology Volume: 59 ISSN: 0099-2240 ISO Abbreviation: Appl. Environ. Microbiol. Publication Date: 1993 Dec |
Date Detail:
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Created Date: 2010-06-25 Completed Date: 2010-06-25 Revised Date: 2010-09-20 |
Medline Journal Info:
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Nlm Unique ID: 7605801 Medline TA: Appl Environ Microbiol Country: United States |
Other Details:
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Languages: eng Pagination: 4051-5 Citation Subset: - |
Affiliation:
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Department of Microbiology and Cell Biology, Department of Metallurgy, and Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India. |
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