Methylxanthines and catechines in different teas (Camellia sinensis L. Kuntze) – influence on antioxidant properties
نویسندگان
چکیده
منابع مشابه
Determination of phenolic compounds and antioxidant activity of green, black and white teas of Camellia sinensis (L.) Kuntze, Theaceae
Green, black and white teas are all produced from leaves and shoots of Camellia sinensis, the only difference is how they are processed. The aim of this study was to compare the total phenols and flavonoid contents and antioxidant capacity of green, black and white tea bags of different brands. The morphodiagnosis of leaves was used to identification of plant material. HPLC-DAD fingerprinting c...
متن کاملAntioxidant and antifungal activities of Camellia sinensis (L.) Kuntze leaves obtained by different forms of production.
The antioxidant and anticandidal activities of leaves obtained from Camellia sinensis by non-fermentation (green and white teas), semi-fermentation (red tea) and fermentation method (black tea) were investigated. It was evaluated the total phenolic content by Folin-Ciocalteau assay; antioxidant capacities were evaluated in vitro using DPPH and ABTS radicals, hypochlorous acid and superoxide ani...
متن کاملComparative Study of Leaf Morphology, Phenolics and Methylxanthines in Camellia sinensis Teas from the Italian Market
In this study, we compared leaf morphology and the phenolic and methylxanthine contents of different teas (Camellia sinensis (L.) Kuntze). Different tea types in loose leaf form available in the Italian market were investigated. The presence of numerous fine silvery-white hairs on the young leaves and buds, and the small-clavate glands on the leaf margins, light-colored and gelatinous in young ...
متن کاملCatechins Profile, Caffeine Content and Antioxidant Activity of Camellia Sinensis Teas Commercialized in Romania.
AIM Catechins profile, caffeine content and antioxidant activity of different green tea and white tea samples commercialized on the Romanian market were investigated. MATERIAL AND METHODS Five green tea samples and five white tea samples commonly available on the Romanian market were processed by infusion and the lyophilisates of infusions were analyzed. Total phenolic content was determined ...
متن کاملPhotosynthesis, Nitrogen Metabolism and Antioxidant Defense System in B-Deficient tea (Camellia sinensis (L.) O. Kuntze) Plants
Response of tea plants to B deficiency was studied in hydroponic medium under environmentally controlled conditions. Plants height, number of leaves and dry matter production of shoot and root were significantly decreased by B deficiency. Concentration of chlorophyll, carotenoids, anthocyanins and flavonoids was not affected by B deficiency in the young leaf, while a significant reduction of Ch...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Potravinarstvo
سال: 2017
ISSN: 1337-0960
DOI: 10.5219/796