Cilt:44 Sayı:01 (2020)

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Browsing Cilt:44 Sayı:01 (2020) by Subject "Camellia sinensis"

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    Evaluation on gallic acid, egcg contents and antiradical activity of green tea and black tea extracts
    (Ankara Üniversitesi, 2020) Ağca, Aslı Can; Batçıoğlu, Kadir; Şarer, Engin; https://orcid.org/0 0000-0002-5710-3479; https://orcid.org/0000-0001-6663-2287; https://orcid.org/0000-0001-6681-2309; Eczacılık Fakültesi
    Objective: Tea is very well known and consumed beverage worldwide also cultivated widely. It is one of phytonutrients that has a protective role associated with its antioxidant activity. The aim of this article is to study the gallic acid, epigallocatechin gallate contents and antiradical activity of green tea and black tea extracts from Camellia sinensis cultivated in North Anatolia. Material and Method: Gallic acid and epigallocatechin gallate contents were investigated in ethanol, methanol and water extracts of green tea and black tea by HPLC analysis and the antiradical activities were also examined for scavenging effect on DPPH and ABTS free radicals. Result and Discussion: In total 6 extracts, gallic acid contents were determined in the range of 0.052- 1.341 mg/100 ml and the value of EGCG (epigallocatechin gallate) were found between 0-19.54 mg/100ml. Water extract of green tea exhibited the best antiradical activity on both DPPH and ABTS radicals. Green tea could be evaluated as a good candidate for health prevention but it should be noted that the harvesting method and manufacturing process, optimum conditions on brewing time, the solvent used, chopping grade of tea leaves should also be taken into consideration during formulating both phytonutrient and pharmaceutical grade products.