Effect of High Hydrostatic Pressure on the Volatile Components of a Glucose−Lysine Model System
| Autor: | Dave A. Ledward, Vanessa M. Hill, Neil S. Isaacs, Jennifer M. Ames |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Pyridines
Hydrostatic pressure chemistry.chemical_element symbols.namesake Aldol reaction Hydrostatic Pressure Pyrroles Furans Pyrans Aqueous solution Chromatography Atmospheric pressure Chemistry Lysine General Chemistry Ketones Nitrogen Maillard reaction Glucose Models Chemical Biochemistry Pyrazines symbols Aldol condensation Gas chromatography Volatilization General Agricultural and Biological Sciences |
| Zdroj: | Journal of Agricultural and Food Chemistry. 47:3675-3681 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/jf990124z |
| Popis: | An aqueous glucose−lysine model system (initial pH 10.1) was incubated at 60 °C and atmospheric pressure (system A) or 600 MPa (system B) to the same absorbance value at 420 nm. Volatile reaction products were isolated by solvent extraction and analyzed by gas chromatography/mass spectrometry. Thirty-two compounds were identified; most contained nitrogen, and pyrazines predominated. Yields of all compounds were suppressed at 600 MPa. Further incubation, at either atmospheric pressure (system C) or 600 MPa (system D), of system A, resulted in lower yields of many compounds at 600 MPa, compared to prolonged incubation at atmospheric pressure. Many of the compounds reported may be formed by, or subsequently react via, aldol condensation. The observed differences among the systems in the profiles and yields of volatile compounds suggest that aldol condensations increase in rate in the systems under pressure. Keywords: High hydrostatic pressure; Maillard reaction; volatiles; glucose; lysine |
| Databáze: | OpenAIRE |
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