Richard W Eaton

United States Department of Agriculture, Fort Collins, CO, United States

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Publications (3)8.3 Total impact

  • Richard W Eaton
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    ABSTRACT: The terpene 2-methylisoborneol (MIB), a major cause of off-flavor in farm-raised catfish and drinking water, is transformed by various different terpene-degrading bacteria. Two of these, the R-limonene-degrading strains Pseudomonas sp. 19-rlim and Sphingomonas sp. BIR2-rlima, dehydrated MIB with the formation of odorless metabolites 2-methylenebornane and 4-methylcamphene. These metabolites which have a structural resemblance to camphor, could be further transformed by camphor-degrading bacteria to more oxidized products. The bacterial dehydrations demonstrated here may have application in removing MIB where it is a problem.
    Biodegradation 08/2011; 23(2):253-61. · 2.17 Impact Factor
  • Source
    Richard W Eaton, Peter Sandusky
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    ABSTRACT: Two terpene-degrading bacteria able to transform (+/-)-geosmin have been identified. Pseudomonas sp. SBR3-tpnb, following growth on gamma-terpinene, converts (+/-)-geosmin to several products; the major products are ketogeosmins. Rhodococcus wratislaviensis DLC-cam, isolated on D-camphor, also converts (+/-)-geosmin to several oxidation products, primarily ketogeosmins identical to those produced by strain SBR3-tpnb as well as hydroxygeosmins. This conversion appears to be inducible by (+/-)-geosmin and not by D-camphor.
    Biodegradation 08/2009; 21(1):71-9. · 2.17 Impact Factor
  • Source
    Richard W Eaton, Peter Sandusky
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    ABSTRACT: Many camphor-degrading bacteria that are able to transform 2-methylisoborneol (2-MIB) have been identified. Three of these strains have been examined in detail. Rhodococcus ruber T1 metabolizes camphor through 6-hydroxycamphor but converts 2-MIB to 3-hydroxy-2-MIB. Pseudomonas putida G1, which metabolizes camphor through 5-hydroxycamphor, converts MIB primarily to 6-hydroxy-2-MIB. Rhodococcus wratislaviensis DLC-cam converts 2-MIB through 5-hydroxy-2-MIB to 5-keto-2-MIB. Together, these three strains produce metabolites resulting from hydroxylation at all of the three available secondary carbons on the six-member ring of 2-MIB.
    Applied and Environmental Microbiology 01/2009; 75(3):583-8. · 3.95 Impact Factor

Publication Stats

22 Citations
8.30 Total Impact Points

Institutions

  • 2009
    • United States Department of Agriculture
      • Agricultural Research Service (ARS)
      Fort Collins, CO, United States
    • University of North Carolina at Chapel Hill
      • Department of Environmental Sciences and Engineering
      Chapel Hill, NC, United States