Vibrational property changes of spruce wood by impregnation with watersoluble extractives of pernambuco (Guilandina echinata Spreng.) II: structural analysis of extractive components
2000; Springer Science+Business Media; Volume: 46; Issue: 3 Linguagem: Inglês
10.1007/bf00776458
ISSN1611-4663
AutoresMasahiro Matsunaga, Keiko Sakai, Hiroshi Kamitakahara, Kazuya Minato, Fumiaki Nakatsubo,
Tópico(s)Agricultural and Food Sciences
ResumoHeartwood 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.
Referência(s)