Kijidani, Yoshio Tsuyama, Taku Takata, Katsuhiko
Published in
Journal of Wood Science
We previously reported the species-specific annual ring formation characteristics of three conifers (slash pine (Pinus elliottii), hinoki (Japanese cypress, Chamaecyparis obtusa) and sugi (Japanese cedar, Cryptomeria japonica)) grown in the same stand over 2 years. We found that the species-specific annual ring formation characteristics affected th...
Komatsu, Toshihiro Yokoyama, Tomoya
Published in
Journal of Wood Science
The condensation reaction of lignin is believed to interfere with delignification in alkaline pulping processes, without any clear evidence, which has motivated us to quantitatively revisit it. This paper is the first of a series, and hence we employed the simplest model system using 4-hydroxymethyl-2-methoxyphenol (vanillyl alcohol, Va) and 2-meth...
Momohara, Ikuo Sakai, Haruko Kurisaki, Hiroshi Ohmura, Wakako Kakutani, Toshikazu Sekizawa, Tokio Imamura, Yuji
Published in
Journal of Wood Science
The conventional stake test is widely used to evaluate wood durability. The test monitors the deterioration level observed on stakes partially inserted into the ground. The test results are conventionally expressed as the relationship between the mean deterioration level and exposure periods. Durability is compared between the stake groups based on...
Huang, Rongfeng Fujimoto, Noboru Sakagami, Hiroki Feng, Shanghuan
Published in
Journal of Wood Science
The sapwood and heartwood of plantation sugi wood (Cryptomeria japonica), and plantation hinoki (Chamaecyparis obtusa) wood were flat-sawn into timbers, then kiln-dried to a MC level below 12%. These timbers were further processed into specific sizes and wetted on the surfaces, preheated at 150 °C and radially compressed into sandwich compressed ti...
Murayama, Kazushige Kukita, Kensuke Kobori, Hikaru Kojima, Yoichi Suzuki, Shigehiko Miyamoto, Kohta
Published in
Journal of Wood Science
Wood-based panels are made by consolidating mats of resinous wooden raw materials under a hot-pressing process. This study investigates the effect of face-layer moisture content (MC) and face–core–face (FCF) ratio of mats on the temperature and vapor pressure behavior during the hot-pressing process. Raising the face-layer MC and lowering the face-...
Teranishi, Masaki Matsubara, Doppo Wakashima, Yoshiaki Shimizu, Hidemaru Kitamori, Akihisa
Published in
Journal of Wood Science
The pretensioning force in bolted joints enhances the lateral strength of the connections, and causes the embedment of metal washers into wood. Despite the significance of embedment behavior in the design of bolted joints, its mechanism has yet to be fully understood. In this study, the mechanism of the embedment of a metal washer into wood along t...
Hu, Wengang Zhang, Jilei
Published in
Journal of Wood Science
The static lateral load–slip behavior of a single-shear plywood-to-plywood single-staple connection (SPSC) was investigated experimentally. A mechanics-based approach was used to develop mechanical models for deriving estimation equations for critical lateral loads of SPSCs based on failure modes of staple legs and connection member materials devel...
Totsuka, Marina Jockwer, Robert Aoki, Kenji Inayama, Masahiro
Published in
Journal of Wood Science
This paper describes results and analysis of experimental testing of entire and partial compression strength and stiffness parallel to the grain of solid timber (Japanese cedar). To investigate the spreading effects, the size effect of strength and stiffness, and the mechanism of the damage zone located close to the loading plates, tests on 90 spec...
Furusawa, Yuka Ashitani, Tatsuya
Published in
Journal of Wood Science
Snow damage is problematic when cultivating bamboo shoots, and “Uradome”, the practice of removing the tips of new shoots, is used as a preventative measure. Producers perform “Uradome” at empirical times, but there is no scientific basis for this. We hypothesized that differences in the structure and composition of the cell wall might affect the o...
Nakagawa, Miyuki Kawai, Shuichi Kanayama, Kozo Umemura, Kenji
Published in
Journal of Wood Science
This study examined the influence of moisture content (MC) on NO2 sorption ability of cedar (Cryptomeria japonica) wood using the specimens with different MCs. Four MC conditions were applied, namely 0%, 8.6%, 12.7% and 16.5%, based on the differences of bonding condition of water molecule in the wood substances. As a result, the NO2 sorption volum...
