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Tannin and Related Polyphenolic Components from Tropical Tree Species

  • Seiji Ohara
  • Koh Hashida
  • Rei Makino
  • Sulaeman Yusuf
Conference paper

Abstract

Tannins are widely distributed in tree species such as conifers, eucalypts and legumes. They are divided into two major groups, condensed tannins and hydrolysable tannins. It is well known that condensed tannins undergo some condensation reactions in alkaline media [1, 2]. Thus, it is supposed that condensed tannins partly recondense with lignin fragments during kraft pulping process and consequently affect the pulp properties on recycling uses. It is also well known that tannins are present at very high concentrations in the bark of timber species. Bark is one of the main unused resources, and large quantities of barks are burned up in Japan [3]. Because the regulation of incinerators was made strict in 2002 due to the problem of dioxins, the development of utilization of bark has become a very important issue. In this study, characterization of tannin and related polyphenolic components from the wood and bark of tropical tree species (Eucalyptus camaldulensis, Acacia mangium and A. auriculiformis) was conducted in order to obtain the basic information relating to above matters.

Keywords

Condensed Tannin Ellagic Acid Hydrolysable Tannin Tropical Tree Species Wood Meal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    Ohra, S. and Hemingwa, R. W. J. Wood Chem. Technol. 11 (1991) 195.CrossRefGoogle Scholar
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    Hashida, K. and Ohara, S. J. Wood Chem. Technol. (2003) in press. Google Scholar
  3. [3]
    Ikami, Y. and Murata, K. Bulletin of FFPRI 2 (2003) 11.Google Scholar
  4. [4]
    Ohara, S., Ohira, T. and Suzuki, K. Mokuzai Gakkaishi 40 (1994) 1363.Google Scholar
  5. [5]
    Ohara, S., Yasuta, Y. and Ohi, H. Holzforschung 57 (2003) 145.CrossRefGoogle Scholar

Copyright information

© Springer Japan 2004

Authors and Affiliations

  • Seiji Ohara
    • 1
  • Koh Hashida
    • 1
  • Rei Makino
    • 1
  • Sulaeman Yusuf
    • 2
  1. 1.Department of Forest ChemistryForestry and Forest Products Research InstituteTsukuba, IbarakiJapan
  2. 2.Research Development Centre for Applied PhysicsIndonesia Institute of SciencesSerpongIndonesia

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