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- W4240705342 abstract "In the previous paper, it was observed that film-like fragments were peeled from the surface of tracheid by the fiberizing treatment of cooked spruce wood, and those were recognized as a part of the middle lamella by means of an electron microscope. The present paper deals with characterization of the peeled fragments. Results obtained are summarized as follows : (1) Lignin concentration of the fragments (P-I, P-I-Di and P-III) is more than two times as much as that of tracheid (Table 1). Arabinan and galactan in the fragments (P-III) are much higher than those in tracheid (Table 2). Consequently, it was confirmed that the fragments are a part of the middle lamella.(2) Degrees of sulfonation and condensation of guaiacyl unit in the middle lamella lignin are almost the same as those in the secondary wall lignin.(3) The amounts of arabinan and galactan in the middle lamella of spruce wood, which were reported by H. Meier in 1961, are remarkably higher than the present results. It is, therefore, presumed that arabinan and galactan in the middle lamella are selectively decomposed during sulfite cooking.(4) Wood chips cooked with sulfite liquors are ruptured selectively at the middle lamella by the fiberizing treatment. High concentration of sulfonated lignin and degradation of hemicellulose in the middle lamella may cause such a selective rupture." @default.
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- W4240705342 date "1975-01-01" @default.
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- W4240705342 doi "https://doi.org/10.2524/jtappij.29.6_324" @default.
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