Japan Wood Research Articles

第４７回日本木材学会大会に参加して

第４７回日本木材学会大会に参加して

Characterization of Rhus vernicifera and Rhus succedanea lacquer films and their pyrolysis mechanisms studied using two-stage pyrolysis-gas chromatography/mass spectrometry

Rhus vernicifera and Rhus succedanea lacquers, which are used as a surface coating for wood, porcelain and metalware in Japan, were investigated using two-stage pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). Urushiol and laccol components were detected in each lacquer film by pyrolysis at 400 °C. These are the monomers, and are characteristic of Rhus vernicifera and Rhus succedanea lacquer films. In addition, alkenes, alkanes, alkenylphenols and alkylphenols were detected by pyrolysis at 500 °C after pyrolysis at 400 °C. Based on these results, the pyrolysis mechanisms of the respective lacquer films were considered. The pyrolysis products were from the urushiol and laccol polymers. These pyrolysis products clearly reflect the structure of each lacquer film.

世界の木材貿易構造の変化とわが国の木材輸入

世界の木材貿易構造の変化とわが国の木材輸入

日本木材防腐工業組合３０年の歩み 創立３０周年記念式典の報告

日本木材防腐工業組合３０年の歩み 創立３０周年記念式典の報告

Valuing the ordinary: The poetics of wood in traditional Japan

Valuing the ordinary: The poetics of wood in traditional Japan

第４２回日本木材学会大会（名古屋）における木材保存関係の研究発表

第４２回日本木材学会大会（名古屋）における木材保存関係の研究発表

Relationships between the states of glue lines, ultrasonic transit times, and bonding properties of nailed-glued joints (In Japanese: English abstract): Journal of the Japan wood research society, vol. 37, no. 2, pp. 142–150 (1991)

Relationships between the states of glue lines, ultrasonic transit times, and bonding properties of nailed-glued joints (In Japanese: English abstract): Journal of the Japan wood research society, vol. 37, no. 2, pp. 142–150 (1991)

4. Trends of Demand for Tropical Wood in Japan and of its Producers (Forest and Society in the Tropics (II))

4. Trends of Demand for Tropical Wood in Japan and of its Producers (Forest and Society in the Tropics (II))

International Forestry Working Group: Wood in Japan

International Forestry Working Group: Wood in Japan

Isolation of Phialophora verrucosa and Fonsecaea pedrosoi from nature in Japan

Seventeen strains of Phialophora verrucosa and one strain of Fonsecaea pedrosoi were isolated from natural sources such as rotting wood, pine bark, pine logs or soil in Japan. These saprophytic isolates were compared morphologically, biologically and serologically with human isolates and their virulence for rats was studied. There were no distinct differences between the isolates from the two sources.

Paulownia—A Crop Tree for Wood Products and Reclamation of Surface-Mined Land

Abstract Paulownia, a naturalized Asiatic species, has been widely planted in the southeastern United States as a shade and ornamental tree because of its rapid growth and beautiful flowers. Although its multiple-use properties have made it an important commercial wood in Japan, it has not been used commercially in the United States. Recently, increased demand for paulownia from Japanese wood industries has created a potential new market for U.S. production of the species. The botanical characteristics, habitat conditions, forestation techniques, and economic potential of paulownia are reported. Also discussed is its utilization in reclamation efforts on surface-mined lands.1

The record of the symposium at joint meeting, Japanese Forestry Society and Japan Wood Research Society

The record of the symposium at joint meeting, Japanese Forestry Society and Japan Wood Research Society

Standard Japanese Translation of “International Glossary of Terms Used in Wood Anatomy” autholized by The Japan Wood Research Society

Standard Japanese Translation of “International Glossary of Terms Used in Wood Anatomy” autholized by The Japan Wood Research Society

Effect on the Temperature in Hot Alkaline Refining of Pulp

As noted in the previous paper (J. Japan Wood Res. Soc., 1957, 31), a sodium hydroxide solution has a stronger refining power than a sodium carbonate solution for the pulp and this difference can be attributed almost to the difference of hydroxyl ion concentration. In this paper, the refining of prechlorinated sulphite pulp with a sodium hydroxide or a sodium carbonate solution were studied for the various temperature between 95°C and 160°C, and the following results were obtained :(1) The temperature is less effective in the refining with a sodium hydroxide solution. With a lower pH solution such as a sodium carbonate solution, however, the refining power varies with the temperature (Fig. 1-3)(2) As a sodium carbonate solution attacks the pulp slowly, it needs a longer time treatment or a higher temperature treatment for the preparation of pulp containing high alpha-cellulose.(3) So far as a sodium hydroxide or sodium carbonate solution is used as the refining agent, the yield of pulp with equal alpha-cellulose content is almost same under any temperature or pH within a range of experiments (Fig. 6).

Trends in Japan's Lumber and Wood Pulp Trade

Trends in Japan's Lumber and Wood Pulp Trade