In the present study, bud yellow tea (BYT), small-leaf yellow tea (SYT) and large-leaf yellow tea (LYT) were produced from the same local “population” variety Huoshanjinjizhong (Camellia sinensis var. sinensis), and the effects of raw material tenderness on the chemical profile and bioactivities of these teas were investigated. The results showed that 11 crucial compounds were screened by headspace solid-phase microextraction-gas chromatography–mass spectrometry from 64 volatiles in these yellow teas, among which the heterocyclic compounds showed the greatest variations. In addition, 43 key compounds including organic acids, flavan-3-ols, amino acids, saccharides, glycosides and other compounds were screened by liquid chromatography-mass spectrometry from 1781 non-volatile compounds. BYT showed the best α-glucosidase inhibitory activity and antioxidant capacity among the selected yellow teas, which might be contributed by the higher content of galloylated catechins. These findings provided a better understanding of the chemical profile and bioactivities of yellow teas.
公司名称 | 产品信息 | 采购帮参考价格 |
---|---|---|
上海源叶 |
(?)-epigallocatechin gallate (EGCG)
|
|
上海源叶 |
theobromine (THB)
|
|
上海源叶 |
(?)-epicatechin gallate (ECG)
|
|
上海源叶 |
(+)-catechin (C)
|
|
上海源叶 |
total antioxidant capacity test kits
|
|
上海源叶 |
(?)-gallocatechin gallate (GCG)
|
|
上海源叶 |
(?)-epicatechin (EC)
|
|
上海源叶 |
2,2′-Azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS)
|
|
上海源叶 |
gallic acid (GA)
|
|
上海源叶 |
α-Glucosidase
|
|
上海源叶 |
(?)-gallocatechin (GC)
|
|
上海源叶 |
caffeine (CAF)
|
|
上海源叶 |
(?)-epigallocatechin (EGC)
|
|
上海源叶 |
1,1-diphenyl-2-picrylhydrazyl (DPPH)
|
|
上海源叶 |
ferric reducing antioxidant power (FRAP) assays
|