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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Vibrational property changes of spruce wood by impregnation with watersoluble extractives of pernambuco (Guilandina echinata Spreng.) II: structural analysis of extractive components

Journal of Wood Science volume 46, pages 253–257 (2000)Cite this article

Abstract

Heartwood of pernambuco (Guilandina echinata Spreng, synCaesalpinia echinata Lam.), which has been used as material for violin bows, was extracted by soaking in water, and the obtained extractives were analyzed. The main components of the extractives were identified to be protosappanin B and brazilin. In particular, protosappanin B occupied about 40% of the pernambuco extractives. The loss tangent (tanδ) of spruce wood impregnated with protosappanin B decreased markedly, the same as that of specimens impregnated with extractives before being purified. It is expected that protosappanin B can make a contribution to the decrease in tanδ due to impregnation with extractives.

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Authors and Affiliations

  1. Forestry and Forest Products Research Institute, 305-8687, Ibaraki, Japan

    Masahiro Matsunaga

  2. Graduate School of Agriculture, Kyoto University, 606-8502, Kyoto, Japan

    Keiko Sakai, Hiroshi Kamitakahara, Kazuya Minato & Fumiaki Nakatsubo

Authors
  1. Masahiro Matsunaga
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  2. Keiko Sakai
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  3. Hiroshi Kamitakahara
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  4. Kazuya Minato
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  5. Fumiaki Nakatsubo
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Correspondence to Masahiro Matsunaga.

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Matsunaga, M., Sakai, K., Kamitakahara, H. et al. Vibrational property changes of spruce wood by impregnation with watersoluble extractives of pernambuco (Guilandina echinata Spreng.) II: structural analysis of extractive components. J Wood Sci 46, 253–257 (2000). https://doi.org/10.1007/BF00776458

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  • DOI: https://doi.org/10.1007/BF00776458

Key words

  • Pernambuco
  • Extractives
  • Protosappanin B
  • Brazilin
  • Vibrational property