Extraction Kinetics of phytochemicals and antioxidant activity during black tea (Camellia sinensis L.) brewing
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چکیده
منابع مشابه
Extraction Kinetics of phytochemicals and antioxidant activity during black tea (Camellia sinensis L.) brewing
BACKGROUND Tea is the most consumed beverage in the world which is second only to water. Tea contains a broad spectrum of active ingredients which are responsible for its health benefits. The composition of constituents extracted to the tea brew depends on the method of preparation for its consumption. The objective of this study was to investigate the extraction kinetics of phenolic compounds,...
متن کاملStudy on the antioxidant activity of tea flowers (Camellia sinensis).
Major chemical compounds in different extracts from tea flowers (Camellia sinensis) were analyzed. Distilled water or 70% ethanol extracts were then fractionated with chloroform, ethyl acetate and n-butanol, respectively. Each extract fraction was tested its scavenging activities on 2,2-diphenyl-1-picrylhydrazyl (DPPH) and hydroxyl free radicals. The results showed that ethyl acetate fraction o...
متن کاملStudy on lead levels in infusion time of imported green and black tea (Camellia sinensis L)
Background: Nowadays, tea is the most popular and frequently consumed beverages in the world after water. There are some beneficial trace elements in tea such as fluoride, caffeine and essential minerals, although there may be heavy metals in tea leaves which threat seriously human health. Therefore, the main objective of current study was to determine and monitor lead content in imported black...
متن کاملAntioxidant activity of Camellia sinensis leaves
All beneficial effects of tea have been attributed to the strong anti-oxidative activity due to phenolic compounds catechins which protect the body from damage caused by free radical-induced oxidative stress (Jang et al., 2007). Carotenoids, flavonoids, cinnamic acids, benzoic acids, folic acid, ascorbic acid, tocopherols, tocotrienols are some of the antioxidants produced by the plant for thei...
متن کاملEffect of different brewing times on antioxidant activity and polyphenol content of loosely packed and bagged black teas (Camellia sinensisL.)
Objective: Determination and comparison of the effect of infusion time on the antioxidant activity and total polyphenol contents of bagged and loosely packed black teas. Materials and Methods: For twenty loosely packed and eleven bagged tea samples, the antioxidant activity and total polyphenol content were analyzed using FRAP and Folin-Ciocalteau methods, respectively. The ANOVA with Tukey pos...
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ژورنال
عنوان ژورنال: Nutrition Journal
سال: 2015
ISSN: 1475-2891
DOI: 10.1186/s12937-015-0060-x