caa a22 4500 463247221 CHVBK 20180405153329.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10086-006-0815-2 doi (NATIONALLICENCE)springer-10.1007/s10086-006-0815-2 The influences of boiling and drying treatments on the behaviors of tension wood with gelatinous layers in Zelkova serrata [Elektronische Daten] [Kentaro Abe, Hiroyuki Yamamoto] This study examined how boiling and drying treatments influenced various physical properties of the tension wood with gelatinous fibers (G-fibers) of a 29-yearold Zelkova branch. By boiling treatment, tension wood with numerous G-fibers contracted considerably in the longitudinal direction and the longitudinal Young's modulus decreased in spite of the water-saturated condition. The drying treatment caused green tension wood and boiled tension wood with numerous G-fibers to shrink longitudinally and increased their longitudinal Young's moduli. These specific behaviors in tension wood were highly correlated with the proportion of G-fibers in a specimen and were probably caused by the microscopic behavior of cellulose microfibril (CMF) in the gelatinous layers (G-layers). The longitudinal shrinkage of tension wood due to drying suggests the existence of a hygro-sensible, noncrystalline region in the CMF, which is abundant in the G-layer. Furthermore, the noncrystalline region in the CMF softens during boiling treatment, resulting in the reduction of the longitudinal Young's modulus in tension wood. The longitudinal contraction of tension wood with G-fibers by boiling might be caused by the tensile growth stress remaining in green G-layers. However, no changes were detected in the 004 d-spacing of cellulose crystal in tension wood from the boiling and drying treatments, regardless of the proportion of G-fibers. The Japan Wood Research Society, 2006 Tension wood nationallicence Gelatinous fiber nationallicence Gelatinous layer nationallicence Cellulose microfibril nationallicence Zelkova serrata M nationallicence Abe Kentaro Graduate School of Bioagricultural Sciences, Nagoya University, 464-8601, Nagoya, Japan aut Yamamoto Hiroyuki Graduate School of Bioagricultural Sciences, Nagoya University, 464-8601, Nagoya, Japan aut Journal of Wood Science Springer-Verlag 53/1(2007-02-01), 5-10 1435-0211 53:1<5 2007 53 10086 https://doi.org/10.1007/s10086-006-0815-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10086-006-0815-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abe Kentaro Graduate School of Bioagricultural Sciences, Nagoya University, 464-8601, Nagoya, Japan aut NATIONALLICENCE 700 1- Yamamoto Hiroyuki Graduate School of Bioagricultural Sciences, Nagoya University, 464-8601, Nagoya, Japan aut NATIONALLICENCE 773 0- Journal of Wood Science Springer-Verlag 53/1(2007-02-01), 5-10 1435-0211 53:1<5 2007 53 10086 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer