E. Obataya, T. Umezawa, F. Nakatsubo, M. Norimoto
The Effects of Water Soluble Extractives on the Acoustic Properties of Reed (Arundo donax L.)
Summary
The storage modulus (E?) and the loss tangent (tan?) of reed (Arundo donax L.) used for woodwinds
were measured at 20°C and 60% relative humidity and the effects of water soluble extractives on these
properties were discussed. The extractives increased both the E? and tan?of reed. There was a linear
relationship between the tan? change and the weight loss due to extraction. By using an uniaxial
rheological model considering the anatomical structure of reed, the E? and tan? of reed were described
using the storage moduli, loss tangents, and volume fractions of bundle sheaths and parenchyma cells.
It was suggested that the extractives in parenchyma cells increased the modulus of elasticity for
parenchyma cells by 25% and reduced the relaxation time of parenchyma cells by a factor of three.
The main constituents of extractives were glucose, fructose and sucrose.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 53, 01/1999
Pages: 63 - 67
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