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Studies On Enzymatic Methods For The Improvement Of Quality Of Tea

Lisa, M. (2004) Studies On Enzymatic Methods For The Improvement Of Quality Of Tea. [Student Project Report] (Submitted)

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Abstract

This Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page.

Item Type: Student Project Report
Additional Information: <p align="justify">In this study, five fungal strains capable of oxidizing catechin were isolated and successfully employed for the fermentation of catechin. It was observed that these fungi could convert catechin to oxidized products leading to an increase in the colour of the broth. Further studies on the extraction and analysis of these colored compounds showed that they are theaflavins and thearubigins. This shows a promising use of these cultures for the improvement of tea quality. However more studies are required to identify the enzymes and then the products of oxidation to successfully use them in the quality improvement of tea. Studies were also conducted to improve the quality of tea by externally adding PPO. External addition of PPO had good effect on the quality of Green tea fermentation. However there was no significant increase in the quality of black tea. In all the studies, it was found that the total colour decreased as fermentation progressed and the brightness increased significantly, which is an important quality attribute of tea. The reasons for why there was no significant increase in the Tf and Tr content in the case of black tea requires a more deep study. Further investigations on the effect of external addition of PPO extracted from tea leaves on the quality of black tea are needed to be done and would be carried out.</p>
Uncontrolled Keywords: Tea Quality Catechin Tea Flavonoids Tea
Subjects: 600 Technology > 07 Beverage Technology > 08 Tea
Divisions: Fermentation Technology and Bioengineering
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 09 Jun 2005
Last Modified: 30 Apr 2012 10:44
URI: http://ir.cftri.com/id/eprint/65

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