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Improvement of the Bitterness and Astringency of Green Tea by Sub-Critical Water Extraction

机译:亚临界水萃取改善绿茶的苦味和涩味

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摘要

Green tea is known for its high content of functional catechins and is commonly consumed for its health-promoting effects. However, green tea catechins are highly bitter and astringent, and thus the development of products that can be consumed regularly is necessary for their efficient, routine intake. The aim of this study was to use sub-critical water extraction (SWE) to produce a green tea extract both less bitter and less astringent than typical green tea. Results from chemical evaluation using a taste sensor analyzer indicated that SWE reduced bitterness, astringency and unpleasant taste while it retained the original fragrance in the green tea extract. Furthermore, the SWE-produced extract had higher amounts of arginine and water-soluble pectin, which are thought to mask the bitterness and astringency of green tea.
机译:绿茶因其功能性儿茶素含量高而闻名,并因促进健康而普遍食用。但是,绿茶儿茶素具有很高的苦味和涩味,因此必须开发可以定期食用的产品,以确保其高效,常规地摄入。这项研究的目的是使用亚临界水提取(SWE)来生产绿茶提取物,其苦味和涩味均低于典型的绿茶。使用味道传感器分析仪进行化学评估的结果表明,SWE减少了苦味,涩味和令人不快的味道,同时保留了绿茶提取物中的原始香气。此外,SWE生产的提取物具有更高含量的精氨酸和水溶性果胶,它们被认为掩盖了绿茶的苦涩味。

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