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Flavour‐active compounds in thermally treated yeast extracts
Author(s) -
Alim Aygul,
Song Huanlu,
Liu Ye,
Zou Tingting,
Zhang Yu,
Zhang Songpei
Publication year - 2018
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.8891
Subject(s) - aroma , chemistry , taste , food science , flavour , yeast , sulfur , aroma compound , organic chemistry , biochemistry
Abstract BACKGROUND Aroma‐active compounds and non‐volatile substances determine the characteristic aroma and taste of yeast extract (YE). Changes in the characteristic aroma and taste of YE due to thermal reaction are rarely studied, and the relationship between aroma‐active compounds and non‐volatile compounds is not yet clear. RESULTS Non‐volatile compounds identified by HPLC and LC/MS/MS were reduced by a rise in temperature, except for some amino acids. Peptides underwent degradation. In addition, a further rise in temperature above 120 °C resulted in a bitter and sour taste. Furans, pyrazines, thiophenes, thiazoles and some branched chain sulfur compounds were derived from GC/O/MS (SPME and SAFE). Sensory results revealed that the concentration of volatile compounds increased with an increase in temperature. The overall aroma profiles of YE at 25, 100 and 110 °C were buttery, green, nutty and meaty, while YE at 140 °C had a strong sour and sulfur odour. CONCLUSION The non‐volatile compounds of YE were reduced and different volatile compounds were produced under different thermal treatments. There was a negative correlation between these two types of compounds. The different taste sensors and all precursors were correlated with each other. There are significant relationships between different odorants and aroma‐active compounds of YE after thermal treatment. © 2018 Society of Chemical Industry