Linked Life Data

14660350

Source:http://linkedlifedata.com/resource/pubmed/id/14660350

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2003-12-8
pubmed:abstractText
A biofilm-forming strain of sulfate-reducing bacteria (SRB), isolated from a naturally occurring mixed biofilm and identified by 16S rDNA analysis as a strain of Desulfomicrobium norvegicum, rapidly removed 200 micro M selenite from solution during growth on lactate and sulfate. Elemental selenium and elemental sulfur were precipitated outside SRB cells. Precipitation occurred by an abiotic reaction with bacterially generated sulfide. This appears to be a generalized ability among SRB, arising from dissimilatory sulfide biogenesis, and can take place under low redox conditions and in the dark. The reaction represents a new means for the deposition of elemental sulfur by SRB under such conditions. A combination of transmission electron microscopy, environmental scanning electron microscopy, and cryostage field emission scanning electron microscopy were used to reveal the hydrated nature of SRB biofilms and to investigate the location of deposited sulfur-selenium in relation to biofilm elements. When pregrown SRB biofilms were exposed to a selenite-containing medium, nanometer-sized selenium-sulfur granules were precipitated within the biofilm matrix. Selenite was therefore shown to pass through the biofilm matrix before reacting with bacterially generated sulfide. This constitutes an efficient method for the removal of toxic concentrations of selenite from solution. Implications for environmental cycling and the fate of sulfur and selenium are discussed, and a general model for the potential action of SRB in selenium transformations is presented.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-10525169, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-10675603, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-10877769, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-11018146, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-14927859, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-16347366, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-16348014, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-16349323, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-1828528, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-7283636, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-8919801, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-8919802, http://linkedlifedata.com/resource/pubmed/commentcorrection/14660350-9687455
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0099-2240
pubmed:author
pubmed:issnType
Print
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
7063-72
pubmed:dateRevised
2010-9-20
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Linked redox precipitation of sulfur and selenium under anaerobic conditions by sulfate-reducing bacterial biofilms.
pubmed:affiliation
Division of Environmental and Applied Biology, Biological Sciences Institute, School of Life Sciences, University of Dundee, Dundee DD1 4HN, Scotland, United Kingdom.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't