| Autor: |
Jinjin Xue, Panpan Liu, Lin Feng, Lin Zheng, Anhui Gui, Xueping Wang, Shengpeng Wang, Fei Ye, Jing Teng, Shiwei Gao, Pengcheng Zheng |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Food Chemistry: X, Vol 20, Iss , Pp 100943- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2590-1575 |
| DOI: |
10.1016/j.fochx.2023.100943 |
| Popis: |
Fresh leaves of Echa 1 were fixed by roller, steam/hot air and light-wave, and the effects of the three fixation methods on the chemical characteristics of straight-shaped green teas (GTs) were studied by widely targeted metabolomic analysis. 1001 non-volatile substances was identified, from which 97 differential metabolites were selected by the criteria of variable importance in projection (VIP) > 1, p 1. Correlation analysis indicated that 14 taste-active metabolites were the major contributors to the taste differences between differently processed GTs. High-temperature fixation induces protein oxidation or degradation, γ-glutamyl peptide transpeptidation, degradation of flavonoid glycosides and epimerization of cis-catechins, resulting in the accumulation of amino acids, peptides, flavonoids and trans-catechins, which have flavor characteristics such as umami, sweetness, kokumi, bitterness and astringency, thereby affecting the overall taste of GTs. These findings provided a scientific basis for the directional processing technology of high-quality green tea. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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