Reference

Volatile carbonyl compounds in white rice-bran

Volatile carbonyl compounds in white rice-bran. Koizumi, Takeo; Miyahara, Toshio; Takeda, Masahisa (Tokyo Univ. Agric., Tokyo, Japan). Nippon Jozo Kyokai Zasshi, 72(11), 818-21 (Japanese) 1977. CODEN: NIJKA4. ISSN: 0369-416X. DOCUMENT TYPE: Journal CA Section: 16 (Fermentations) Section cross-reference(s): 11 2,4-Dinitrophenylhydrazones of carbonyl compds. prepd. by ether extn. of white rice bran were heated with phthalic acid to liberate the free carbonyl compds. which were analyzed by gas chromatog. Acetaldehyde [75-07-0], propionaldehyde [123-38-6], acetone [67-64-1], isobutyraldehyde [78-84-2], n-butyraldehyde [123-72-8], diacetyl [431-03-8], Me Et ketone [78-93-3], isovaleraldehyde [590-86-3], diethyl ketone [96-22-0], n-valeraldehyde [110-62-3], n-capronaldehyde [66-25-1], and acetoin [513-86-0] were identified. Ferricyanide reducing-compds. and carbonyl compds. were found more in the sake made from white rice bran than the sake made from white rice.

Kinetics and mechanism of the decomposition of N-brominated alanine in aqueous solution

Kinetics and mechanism of the decomposition of N-brominated alanine in aqueous solution. Stanbro, William D.; Lenkevich, Michael J. (Appl. Phys. Lab., Johns Hopkins Univ., Laurel, MD 20707, USA). Int. J. Chem. Kinet., 15(12), 1321-8 (English) 1983. CODEN: IJCKBO. ISSN: 0538-8066. DOCUMENT TYPE: Journal CA Section: 34 (Amino Acids, Peptides, and Proteins) Section cross-reference(s): 22 The kinetics and the mechanism of the interaction of bromine with alanine are examd. The products and the rates depend in a complex way on the initial reactant concn. and pH. Acetaldehyde prodn. is favored at low bromine-to-alanine ratios, low bromine concns., and pH values above 6. The first-order rate const. for the formation of acetaldehyde from alanine under these conditions is given. At higher concns. the nitrile is formed through a bromoimine intermediate. Under most conditions the nitrile appears to form from a catalyzed decompn. of the bromo imine which is too fast to be followed by the methods used in this study. However, residual amts. 7726-95-6 and 56-41-7 are just another two chemicals used in this study. of the bromo imine decay by a slower first-order mechanism. .