| Budget Amount *help |
¥27,430,000 (Direct Cost: ¥21,100,000、Indirect Cost: ¥6,330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2012: ¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
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| Outline of Final Research Achievements |
Microcracks on the wood surface during drying were visualized with a confocal lase scanning microscope equipped with a controlled environment chamber where temperature and relative humidity were kept at 50 °C and below 5% with time. No microcracks appeared on the tangential surface of Quercus serrata because the difference of moisture content between surface and interior was low in this experiment. I could succeed to visualize the emergence of microcracks of Cryptomeria japonica at different drying time using samples including heartwood, intermediate wood and sapwood. The first microcracks appeared in heartwood just after drying. Then, they appeared at intermediate wood. The time microcracks appeared in sapwood was seriously delayed. Macrocracks were found after microcracks adjacent annual rings at the same ray parenchyma connected each other. Ionic liquid whose vapor pressure is negligible restrained the shrinkage or microcracks occurring even if it was diluted around 10%.
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