Studies on the Utilization of Hydrocarbons by Microorganisms

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  • OMORI Toshio
    Department of Agricultural Chemistry, Faculty of Agriculture, The University of Tokyo
  • YAMADA Koich
    Department of Agricultural Chemistry, Faculty of Agriculture, The University of Tokyo

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  • Part XIII. Oxidation of <i>m</i>-Xylene and Pseudocumene by <i>Pseudomonas aeruginosa</i>

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In the course of study on the utilization of methyl-substituents of mono-cyclic aromatic hydrocarbons by Pseudomonas aeruginosa S668B2, some organic acids and phenolic compounds were found to be produced in culture broth.<br> Strain S668B2 was capable of producing ultraviolet absorbing and fluorescent substances from m-xylene. These substances were isolated in the form of crystal and identified as 3-methyl salicylic acid and m-toluic acid.<br> Strain S668B2 also produced ultraviolet absorbing and fluorescent substances from pseudocumene (1, 2, 4-trimethyl benzene). These substances were isolated in the crystalline form and identified as 3, 4-dimethyl benzoic acid and 3, 4-dimethyl phenol.<br> Strain S668B'' did not attack o-xylene. Under the similar conditions Pseudomonas desmolytica S449B3, which produced a large amount of cumic acid from p-cymene, did not oxidize o-xylene, but grew on p-xylene, m-xylene and 1, 2, 4-trimethyl benzene.<br> None out of 364 soil samples gave microorganisms which utilize o-xylene as a sole carbon source.

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