title: Microbial degradation and assimilation of n-alkyl-substituted cycloparaffins.
abstract: Studies were conducted on the oxidation and assimilation of n-alkyl-substituted cycloalkane substrates by several hydrocarbon-utilizing microorganisms. These microorganisms utilized heptadecylcyclohexane and dodecylcyclohexane as the sole source of carbon and energy. Neither methylcyclohexane nor ethylcyclohexane was utilized as a growth substrate by any organisms tested. Gas-liquid chromatographic analyses of fatty acids present in cells after growth on dodecylcyclohexane confirm direct incorporation of both alpha- and beta-oxidation products. Growth patterns of these organisms on n-alkyl-substituted cyclohexane fatty acids of varying chain lengths suggest a greater probability of ring cleavage when the side chain contains an odd number of carbons.
mesh_terms: D001673:Biodegradation, Environmental; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D003510:Cyclohexanes / Q000378:metabolism; D003516:Cycloparaffins / Q000378:metabolism*; D005227:Fatty Acids / Q000032:analysis / Q000096:biosynthesis; D008851:Micropore Filters; D009161:Mycobacterium / Q000032:analysis / Q000378:metabolism*; D009616:Nocardia asteroides / Q000032:analysis / Q000378:metabolism*; D010084:Oxidation-Reduction; D010743:Phospholipids / Q000032:analysis
chemical_list: D003510:Cyclohexanes; D003516:Cycloparaffins; D005227:Fatty Acids; D010743:Phospholipids