Polyphenols and Antioxidant Activity of Thunbergia laurifolia Infused Tea under Drying Conditions

被引:4
|
作者
Essiedu, Justice A. [1 ,2 ]
Gonu, Hellie [1 ,2 ]
Adadi, Parise [3 ]
Withayagiat, Ulaiwan [1 ,2 ]
机构
[1] Kasetsart Univ, Fac Agro Ind, Dept Biotechnol, Bangkok, Thailand
[2] Kasetsart Univ, Fac Agro Ind, Fermentat Technol Res Ctr, Bangkok, Thailand
[3] Univ Otago, Dept Food Sci, Dunedin, New Zealand
关键词
CHEMICAL-COMPOSITION; CAMELLIA-SINENSIS; CHLOROPHYLL; EXTRACT; RESPECT; QUALITY; COLOR;
D O I
10.1155/2023/5046880
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Thunbergia laurifolia leaf is used in Thai herbal medicine to moderate alcohol, food poisoning, and other health-related diseases mainly due to its overwhelming phytochemical compounds which exert several biological functions such as antioxidant, and anti-inflammatory properties, among others. This study investigated the potential effects of hot air-drying conditions (TL-D80 degrees C, TL-D90 degrees C, and TL D100 degrees C) of T. laurifolia tea leaves on phenolic compounds, total flavonoid content (TFC), total phenolic content (TPC), and antioxidant activities (AOA) of the infused teas. The results show that an increase in drying temperature significantly (p < 0.05) improved TPC (709.7 +/- 1.36-744.8 +/- 5.79 mg GAE/) and TFC (198.98 +/- 7.59-207.16 +/- 4.10 mg RE/L) of infused teas. TL-D80 degrees C (69.9 +/- 0.95%) and TLD90 degrees C (69.3 +/- 0.7%) infused teas showed significantly (p < 0.05) higher DPPH inhibitory effect compared to TL-D100 degrees C. Treatment had no effects (p > 0.05) on ABTS.(+) scavenging activity. The phenolic compounds detected in infused teas were rosmarinic acid, caffeic acid, gallic acid, catechin, rutin, and quercetin. Regarding, the cumulative phenolic compounds TL-D100 degrees C infused teas were significantly higher (p < 0.05) compared to TL-D90 degrees C and TL-D80 degrees C. The results suggest that drying conditions (i.e., TL-D100 degrees C within 30 min) could be used to achieve appropriate moisture content of T. laurifolia tea leaves without compromising the phytochemical compositions and antioxidant potentials of the resulting infused teas.
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页数:9
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