Abstract
The presense of hydrolysable tannins in green tea, as well as hydrolysable and condensed tannins in black tea has been prooved with the help of potentiometric method, and condensed compounds take 70% of the total content. Antioxidant activity of tea extracts with different type of fermentation has been measured using amperometric method and determined, that the samples of green tea have the highest value of activity. Correlation between the total amount of polyphenols in tea and antioxidant activity was found. There was established, that decrease of pH lowers the quantity of tannins, which take part in oxidation-reduction processes, what may have a connection with their transformation into non-ionized form.
Highlights
The presense of hydrolysable tannins in green tea, as well as hydrolysable and condensed tannins in black tea has been prooved with the help of potentiometric method, and condensed compounds take 70% of the total content
Antioxidant activity of tea extracts with different type of fermentation has been measured using amperometric method and determined, that the samples of green tea have the highest value of activity
There was established, that decrease of pH lowers the quantity of tannins, which take part in oxidationreduction processes, what may have a connection with their transformation into non-ionized form
Summary
Ss style; 3 – AKBAR; 4 – ss m ssam Tea antioxidants in cancer chemoprevention // J.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
