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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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

Journal of Wood Science volume 56, pages 403–410 (2010)Cite this article

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 10:6–107 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.

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Authors and Affiliations

  1. Faculty of Education, Shimane University, 1060 Nishikawatsu-cho, Matsue, Shimane, 690-8504, Japan

    Tetsuya Takahashi & Yuji Aso

  2. Bio-Architecture Center, Kyushu University, Fukuoka, 812-8581, Japan

    Wakako Kasai & Tetsuo Kondo

Authors
  1. Tetsuya Takahashi
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  2. Yuji Aso
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  3. Wakako Kasai
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  4. Tetsuo Kondo
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Correspondence to Tetsuya Takahashi.

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Takahashi, T., Aso, Y., Kasai, W. et al. Improving the antibacterial activity against Staphylococcus aureus of composite sheets containing wasted tea leaves by roasting. J Wood Sci 56, 403–410 (2010). https://doi.org/10.1007/s10086-010-1110-9

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  • DOI: https://doi.org/10.1007/s10086-010-1110-9

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