The aim of this research was to explore the effect of fixation,rolling,and drying processing technology on the retention rate of green tea catechins components and tea polyphenol.Different fixation processes(rotary dr...The aim of this research was to explore the effect of fixation,rolling,and drying processing technology on the retention rate of green tea catechins components and tea polyphenol.Different fixation processes(rotary drumfiring,microwave,steam-blasting),rolling process(weight of rolling,gently press rolling and traditional rolling),drying process(stove drying,roasting dehydration,baked fried drying) were adopted.The effect of different tea processing technology on the retention rate of catechins component and tea polyphenol was analyzed.It showed that the microwave fixation process,gently press rolling process,baked fried dry process were beneficial to keep high levels of EGCG,C,EGC,EC,ECG.展开更多
Tea is one of the most widely consumed beverages in the world,among which green tea is most common in China and Korea.Green tea constituents possess a great value to human health wherein lots of clinical studies and i...Tea is one of the most widely consumed beverages in the world,among which green tea is most common in China and Korea.Green tea constituents possess a great value to human health wherein lots of clinical studies and investigations were conducted by researchers and experts.However,there are still increasing demands and interest on the health properties of green tea,especially its effects on mental state of human brains.Based on the collated clinical studies,green tea was used to improve mental alertness and thinking.Thus,higher consumption of green tea was associated with a lower prevalence of cognitive impairment.This review summarizes the effects of drinking green tea on the mental state of human brains.Green tea contains a unique set of L-theanine and epigallocatechin gallate(EGCG) that possess biological activities in antioxidant,anti-memory loss,and antiproliferative assays potentially relevant to the prevention and treatment of various forms of brain damage.Theanine in green tea may play a role in reducing stress.The use of highly innovative method of reading and mental behavior of the human brain's response with the intake of green tea thru neuroimaging was also covered in this review.展开更多
为探究2000—2023年绿茶茶多酚的研究内容、热点及其发展趋势,采用中国知网(CNKI)和Web of Science(WOS)数据库相关数据,利用CiteSpace可视化软件对中英文文献中的发文国家、作者、机构、关键词等进行综合分析,得出相应可视化图谱。结...为探究2000—2023年绿茶茶多酚的研究内容、热点及其发展趋势,采用中国知网(CNKI)和Web of Science(WOS)数据库相关数据,利用CiteSpace可视化软件对中英文文献中的发文国家、作者、机构、关键词等进行综合分析,得出相应可视化图谱。结果表明,英文发文量明显多于中文发文量,英文文献1814篇,中文文献仅434篇;美国和中国是发文量最多的国家,其中介中心性均大于0.2,说明两国对绿茶茶多酚研究最为深入,研究贡献最大。研究作者和机构之间合作交流较分散,多为内部交流。根据得出的关键词共现及聚类图谱再结合时区图分析,绿茶茶多酚研究侧重于茶多酚提取方法及工艺研究、药理活性及相关作用机制以及这些药理作用在相关慢性病防治方面的研究。值得注意的是,针对绿茶茶多酚的生物利用度差设计的基于纳米技术安全载药系统的研究、茶多酚与肠道微生物群之间相互作用及在发挥胃肠道疾病保护作用等方面的研究逐渐被关注,成为新的研究热点。展开更多
文摘The aim of this research was to explore the effect of fixation,rolling,and drying processing technology on the retention rate of green tea catechins components and tea polyphenol.Different fixation processes(rotary drumfiring,microwave,steam-blasting),rolling process(weight of rolling,gently press rolling and traditional rolling),drying process(stove drying,roasting dehydration,baked fried drying) were adopted.The effect of different tea processing technology on the retention rate of catechins component and tea polyphenol was analyzed.It showed that the microwave fixation process,gently press rolling process,baked fried dry process were beneficial to keep high levels of EGCG,C,EGC,EC,ECG.
基金supported by National Key Technology R&D Program in the 12th Five Year Plan of China (Project No.2012BAD36B06-2)
文摘Tea is one of the most widely consumed beverages in the world,among which green tea is most common in China and Korea.Green tea constituents possess a great value to human health wherein lots of clinical studies and investigations were conducted by researchers and experts.However,there are still increasing demands and interest on the health properties of green tea,especially its effects on mental state of human brains.Based on the collated clinical studies,green tea was used to improve mental alertness and thinking.Thus,higher consumption of green tea was associated with a lower prevalence of cognitive impairment.This review summarizes the effects of drinking green tea on the mental state of human brains.Green tea contains a unique set of L-theanine and epigallocatechin gallate(EGCG) that possess biological activities in antioxidant,anti-memory loss,and antiproliferative assays potentially relevant to the prevention and treatment of various forms of brain damage.Theanine in green tea may play a role in reducing stress.The use of highly innovative method of reading and mental behavior of the human brain's response with the intake of green tea thru neuroimaging was also covered in this review.
文摘为探究2000—2023年绿茶茶多酚的研究内容、热点及其发展趋势,采用中国知网(CNKI)和Web of Science(WOS)数据库相关数据,利用CiteSpace可视化软件对中英文文献中的发文国家、作者、机构、关键词等进行综合分析,得出相应可视化图谱。结果表明,英文发文量明显多于中文发文量,英文文献1814篇,中文文献仅434篇;美国和中国是发文量最多的国家,其中介中心性均大于0.2,说明两国对绿茶茶多酚研究最为深入,研究贡献最大。研究作者和机构之间合作交流较分散,多为内部交流。根据得出的关键词共现及聚类图谱再结合时区图分析,绿茶茶多酚研究侧重于茶多酚提取方法及工艺研究、药理活性及相关作用机制以及这些药理作用在相关慢性病防治方面的研究。值得注意的是,针对绿茶茶多酚的生物利用度差设计的基于纳米技术安全载药系统的研究、茶多酚与肠道微生物群之间相互作用及在发挥胃肠道疾病保护作用等方面的研究逐渐被关注,成为新的研究热点。
