ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The chemistry and kinetics of pyrazine formation were studied in four amino acid-glucose model systems. Different amounts of the same alkylpyrazines were produced in the four systems. The most abundant alkylpyrazine generated in a gylcine-glucose system was 2,3,5-tri-methylpyrazine, while 2-methylpyrazine was most abundant in an arginine-glucose system and 2,5-dimethyIpyrazine predominated in a histidine-glucose system. 2-MethyIpyrazine and 2,5-dimefhylpyrazine were the two most abundant alkypyrazines in a lysine-glucose system. Kinetic data from the arginine-glucose system indicated that each of four selected pyrazines was formed by a pseudo-zero-order reaction. Activation energies in the same system were determined to be 19.5 ± 4.1 Kcal mole−1 for pyrazine, 24.8 ± 8.7 Kcal Mole″1 for 2-methylpyrazine, 20.8 ± 4.7 Kcal mole−1 for 2,6-dimethylpyrazine and 29.0 ± 3.8 Kcal mole−1 for 2-methyl-6, 7-dihydro-5H-cyclopen-, tapyrazine.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1989.tb05172.x
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