Results 21 to 30 of about 2,159,130 (277)

Research on the Suitability of Teas Made from Fresh Tea Leaves of Purple Tea

open access: yesShipin gongye ke-ji, 2022
Three purple tea varieties (lines), namely Hongye-1, Hongye-2, Danfei in different seasons as test materials, were made into green tea, white tea and black tea.
Qiushuang WANG   +10 more
doaj   +1 more source

Comparative Analysis of Black Tea Metabolites from Different Origins Based on Extensively Targeted Metabolomics

open access: yesShipin gongye ke-ji, 2022
In order to explore the origin differences of black tea metabolites, the metabolites in black tea produced in Fu 'an and Youxi of Fujian province were compared and analyzed by using sensory evaluation method and extensive targeting metabolomic ...
Jiexin LIN   +7 more
doaj   +1 more source

Association between consumption of black tea and iron status in adult Africans in the North West Province: The THUSA study [PDF]

open access: yes, 2008
The association between black tea consumption and iron status was investigated in a sample of African adults participating in the cross-sectional THUSA (Transition and Health during Urbanization of South Africans) study in the North West Province, South ...
Hogenkamp, P.S.   +4 more
core   +1 more source

Investigation on the Quality of Commercially Available GABA Tea in Taiwan

open access: yesStandards, 2023
This study collected 220 commercially available samples of γ-Aminobutyric acid (GABA) tea produced in Taiwan from 2016 to 2021. The 220 tea samples were categorized into five types of GABA tea, including 108 GABA Oolong tea, 71 GABA Black tea, 21 GABA ...
Mu-Chen Wu   +4 more
doaj   +1 more source

Chemical Studies on Plant Polyphenols and Formation of Black Tea Polyphenols [PDF]

open access: yes, 2008
Recent biological and pharmacological studies strongly suggested that plant polyphenols in foods, beverages and crude drugs have various health benefits.
田中, 隆
core   +1 more source

CATECHIC TANNIN CONTENT OF DIFFERENT TEA SAMPLES

open access: yesSabiad, 2022
Objective: Camellia sinensis (tea) which is a member of the Theaceae family can be found in many tropical and subtropical areas with diverse cultural forms.
Gülbahar Özge Alim Toraman, Nur Tan
doaj   +1 more source

THE USE OF EXTRACTED PHENOLIC COMPOUNDS FROM GREEN AND BLACK TEA AS NATURAL ANTIOXIDANTS [PDF]

open access: yesJournal of Food and Dairy Sciences, 2000
This study was carried out to separate and identify green and black tea phenolic compounds. These compounds were added to sunflower oil as natural antioxidants at levels 150, 200 and 250 ppm and stored in amber glass bottles at 40°C for nine weeks.
A. Salama,
doaj   +1 more source

Hypoglycemic effects of black brick tea with fungal growth in hyperglycemic mice model

open access: yesFood Science and Human Wellness, 2022
Dark tea (containing Eurotium cristatum) and black tea have hypoglycemic effects. The black brick tea with fungal growth is obtained from black tea by adding E. cristatum, followed by steaming, pressing, fungal growth, and drying.
Wei Xu   +7 more
doaj   +1 more source

Multi-Metabolomics Coupled with Quantitative Descriptive Analysis Revealed Key Alterations in Phytochemical Composition and Sensory Qualities of Decaffeinated Green and Black Tea from the Same Fresh Leaves

open access: yesFoods, 2022
The supercritical CO2-based decaffeination (SCD) method can be used to prepare decaffeinated tea, but its overall effect on the phytochemicals, volatiles, and sensory qualities of green and black teas is still unclear, and its suitability to prepare ...
Jie Wang   +8 more
doaj   +1 more source

Polymer-Like Polyphenols of Black Tea and Their Lipase and Amylase Inhibitory Activities [PDF]

open access: yes, 2008
Lipase and amylase inhibitory activities of black tea were examined. After solvent partitioning of a black tea extract with the ethyl acetate and n-butanol, the two soluble fractions showed comparable inhibitory activities.
Andou, Hisashi   +5 more
core   +1 more source

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