Volatile Compounds Generated from Thermal Reaction of Methionine and Methionine Sulfoxide with or without Glucose

Methionine and methionine sulfoxide were mixed with or without glucose in distilled water, individually. These solutions were heated in closed sample cylinders at 180 degrees C for 1 h. The volatile compounds generated were extracted using methylene chloride and analyzed by GC and GC-MS. Pyrazine co...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 1995-06, Vol.43 (6), p.1641-1646
Main Authors: Yu, Tung-Hsi, Ho, Chi-Tang
Format: Article
Language:English
Subjects:
ACTIVIDAD CATALITICA
ACTIVITE CATALYTIQUE
AMINO ACID DERIVATIVES
AMINO COMPOUNDS
Biological and medical sciences
CATALYTIC ACTIVITY
CHEMICAL REACTIONS
COMPOSE AMINE
COMPOSE ORGANOSOUFRE
COMPOSE VOLATIL
COMPUESTO ORGANICO DEL AZUFRE
COMPUESTO VOLATIL
COMPUESTOS DE AMINA
DEGRADACION
DEGRADATION
Food engineering
Food industries
Fundamental and applied biological sciences. Psychology
General aspects
GLUCOSA
GLUCOSE
HEAT TREATMENT
METHIONAL
METHIONINE
METHYL SULFIDE
METIONINA
ODEUR
ODORS
OLOR
ORGANOSULPHUR COMPOUNDS
PIRAZINAS
PROPIEDADES TERMICAS
PROPRIETE THERMIQUE
PYRAZINE
PYRAZINES
REACCIONES QUIMICAS
REACTION CHIMIQUE
SMELL
THERMAL DEGRADATION
THERMAL PROPERTIES
TRAITEMENT THERMIQUE
TRATAMIENTO TERMICO
VOLATILE COMPOUNDS
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Description
Summary:Methionine and methionine sulfoxide were mixed with or without glucose in distilled water, individually. These solutions were heated in closed sample cylinders at 180 degrees C for 1 h. The volatile compounds generated were extracted using methylene chloride and analyzed by GC and GC-MS. Pyrazine compounds, especially 2,5-dimethyl-, 2-ethyl-5-methyl-, trimethyl-, and methylpyrazines were the predominant compounds among those generated from thermal interactions of glucose and methionine or methionine sulfoxide. The formation of methional or those compounds derived from methional was found to be more favorable from the thermal degradation of methionine, whereas the formation of dimethyl polysulfides, especially dimethyl disulfide and dimethyl trisulfide, was found to be more favorable from the thermal degradation of methionine sulfoxide. Glucose was found to have a catalytic effect on the formation of volatile compounds from the thermal degradation of methionine or methionine sulfoxide
ISSN:0021-8561
1520-5118
DOI:10.1021/jf00054a043