Bow variation in kiln-dried boxed-heart square timber of sugi (Cryptomeria japonica) cultivarsSpringer Science and Business Media LLC - Tập 57 - Trang 363-370 - 2011
Kana Yamashita, Yasuhiko Hirakawa, Shuetsu Saito, Hiroshi Nakatani, Motoyoshi Ikeda
To evaluate the bow variation in boxed-heart square timber of sugi (Cryptomeria japonica), bows from kiln-dried timber for five sugi cultivars with different longitudinal shrinkage trends were compared for two stem heights. Two general trends were observed, depending on the cultivar: (1) either the bow was larger at the lower than at the upper part of the stem, or (2) the bows at the lower and the...... hiện toàn bộ
Pyrolysis GC-MS analysis of tars formed during the aging of wood and bamboo crude vinegarsSpringer Science and Business Media LLC - Tập 56 - Trang 47-52 - 2009
Sung Phil Mun, Chang Sub Ku
Constituents of tars formed during the aging of bamboo (Phyllostachys pubescens), oak (Quercus serrata), and pine (Pinus densiflora) wood crude vinegars were analyzed by pyrolysis-gas chromatography (Py-GC) and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) to investigate their origination. The pyrolysate of tars obtained from the wood and bamboo crude vinegars were almost identical and...... hiện toàn bộ
Fatigue of structural plywood under cyclic shear through thickness I: fatigue process and failure criterion based on strain energySpringer Science and Business Media LLC - Tập 53 - Trang 296-302 - 2007
Takanori Sugimoto, Yasutoshi Sasaki, Mariko Yamasaki
The fatigue behavior of plywood specimens under shear through thickness was examined on the basis of strain energy to obtain common empirical equations for the fatigue process and failure criterion under various loading conditions. Specimens were cut from commercial plywood panels of 9-mm thickness. Loading conditions were set as follows: a square waveform at a loading frequency of 0.5 Hz, a trian...... hiện toàn bộ
Two-step hydrolysis of Japanese cedar as treated by semi-flow hot-compressed waterSpringer Science and Business Media LLC - Tập 56 - Trang 331-338 - 2010
Natthanon Phaiboonsilpa, Kazuchika Yamauchi, Xin Lu, Shiro Saka
Two-step hydrolysis of Japanese cedar (Cryptomeria japonica) was studied as treated by semi-flow hot-compressed water at 230°C/10 MPa for 15 min and 280°C/10 MPa for 30 min as the first and second stages, respectively. At the first stage, hemicelluloses and para-crystalline cellulose, whose crystalline structure is somewhat disordered, were found to be selectively hydrolyzed, as well as lignin dec...... hiện toàn bộ
Factors influencing retention behavior of aluminum compounds on handsheetsSpringer Science and Business Media LLC - Tập 45 - Trang 154-160 - 1999
Masato Kato, Akira Isogai
Handsheets were prepared with aluminum sulfate under various conditions of pulp suspension, and factors influencing retention behavior of aluminum components on the handsheets were studied on the basis of their aluminum contents. When deionized water was used in the handsheet-making process, aluminum contents in the handsheets had a plateau level of 0.7mg/g in the range of 1%–8% Al2(SO4)3 addition...... hiện toàn bộ
Reinforcement of wood flour board containing ligno-cellulose nanofiber made from recycled woodSpringer Science and Business Media LLC - Tập 61 - Trang 492-499 - 2015
Yoichi Kojima, Atsushi Ishino, Hikaru Kobori, Shigehiko Suzuki, Hirokazu Ito, Rie Makise, Itsuro Higuchi, Masaki Okamoto
Wood-based materials are widely used in residential construction. These materials can be made from virgin or recycled wood, and most of the materials are fabricated with chemical adhesives. Finding replacements for such chemical adhesives poses major challenges. This study explored nanofiber technology as an alternative to these adhesives. Previous studies have shown that the three-dimensional bin...... hiện toàn bộ
Formation and chemical structures of acid-soluble lignin I: sulfuric acid treatment time and acid-soluble lignin content of hardwoodSpringer Science and Business Media LLC - Tập 47 - Trang 69-72 - 2001
Seiichi Yasuda, Kazuhiko Fukushima, Akihiro Kakehi
To elucidate the formation mechanism of acidsoluble lignin (ASL) formed in the Klason lignin determination, beech wood meals were treated with sulfuric acid (SA) under various conditions, and the ASL solution was extracted with CHC13. The results indicated the following: (1) wood components yielding ASL are dissolved in 72% SA during the initial stage; (2) the quantity of ASL is highest during the...... hiện toàn bộ