acetanilide] by a common soil fungus, Chaetomium globosum, produced chloride and four identifiable organic metabolites: 2chloro-2',6'-diethylacetanilide, 2,6-diethyl-N-(methoxymethyl)aniline, 2,6-diethylaniline, and
Thermal degradation of cystine in aqueous solutions was studied by using a closed model system. The degradations were carried out at pH's of 5.5 and 2.3 and at 160 °C, representing roasting temperature. Forty-two volatile compounds were identified at pH 5.5 and twenty-three at pH 2.3. Three novel sulfides were found in the pH 5.5 volatile mixture: ethyl l-(ethylthio)ethyl disulfide and the corresponding triand tetrasulfides. Only the disulfide was found at pH 2.3. The organoleptic character of the disulfide was sulfury, roasted, and oniony. A mechanism for the formation of these sulfides is proposed. Fifty-five percent of the volatUe yield at pH 2.3 were 1,2,4-trithiolanes. Mechanisms for the formation of secondary products are discussed.
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