Abstract

By taking account of the fine structures and the proportion and distribution of the chemical constituents, the values of dielectric constant for the tracheids in early and late woods as well as for the ray cell were theoretically calculated. Furthermore, by considering the fraction of cell wall and the arrangement of cells, the values of dielectric constant for early and late woods and those for wood in three principal directions were also calculated. From the results, it has been found that the anisotropy of dielectric constant of wood in the transverse direction depends on the fraction of late wood and the value of dielectric constant in the tangential direction is influenced remarkably by the irregular arrangement of cells. The experimental values almost coincided with the theoretical ones.

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