Back to Search Start Over

Improving the antibacterial activity against Staphylococcus aureus of composite sheets containing wasted tea leaves by roasting.

Authors :
Takahashi, Tetsuya
Aso, Yuji
Kasai, Wakako
Kondo, Tetsuo
Source :
Journal of Wood Science; Oct2010, Vol. 56 Issue 5, p403-410, 8p
Publication Year :
2010

Abstract

We used various kinds of wasted tea leaves to develop composite sheets with antibacterial properties. Antibacterial tests showed that the number of viable bacterial cells for the sheet containing wasted green tea leaves was around 10:-10 CFU/ml after 18 h culture compared to 108 CFU/ml for a tea-free sheet. This indicates that cell growth was signifi cantly inhibited. For sheets containing other types of tea leaves (oolong, black, hojicha, and pu-erh), living cells were not found, indicating that these sheets had superior antibacterial effects. Living cells were also not found in sheets containing wasted black tea leaves or roasted tea leaves at a concentration of 60% by weight after 6 h cultivation. Therefore, roasting treatment of wasted green tea leaves was examined to improve the antibacterial activity of the sheet. In particular, the focus was on structural conversion of catechins by heating. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14350211
Volume :
56
Issue :
5
Database :
Complementary Index
Journal :
Journal of Wood Science
Publication Type :
Academic Journal
Accession number :
54566044
Full Text :
https://doi.org/10.1007/s10086-010-1110-9