title: Identification of isobutyronitrile and isobutyraldoxime O-methyl ether as volatile microbial catabolites of valine.
abstract: G.l.c.--mass-spectral analysis of headspace above cultures of Aeromonas and Moraxella spp. indicates the presence of isobutyronitrile, isobutyraldoxime O-methyl ether, methacrylonitrile and possibly methacrylaldoxime O-methyl ether. Accumulation of these catabolites is maximal under low oxygen concentrations and is enhanced by enrichment of the medium with valine. Isobutyraldoxime O-methyl ether is established as the compound observed but not identified in previous studies with other bacterial species involved in spoilage of meat and chicken.
mesh_terms: D000333:Aeromonas / Q000378:metabolism*; D055598:Chemical Phenomena; D002621:Chemistry; D002849:Chromatography, Gas; D013058:Mass Spectrometry; D008738:Methyl Ethers / Q000032:analysis*; D009016:Moraxella / Q000378:metabolism*; D009570:Nitriles / Q000032:analysis*; D010091:Oximes / Q000032:analysis*; D014633:Valine / Q000378:metabolism*
chemical_list: D008738:Methyl Ethers; D009570:Nitriles; D010091:Oximes; C022246:isobutyronitrile; C022245:isobutyraldoxime O-methyl ether; D014633:Valine