| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2018: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
When enzymatic saccharification was performed on ammonia-treated biomass derived from six species of hardwood, the amount of easily enzymatic degradable xylan, which might exists on the surface of cellulose, is large in birch wood biomass. On the contrary, it revealed that the amount of easily enzymatic degradable xylan was quit low in wood biomasses of Acacia and Eucalyptus. Consequently, in the later case, a large part of xylan might exist as an recalcitrant form against enzymatic saccharification in the complex with cellulose。 In addition, it was shown that the degree of substitution of the glucuronic acid residue attached on the xylan main chain is lower in the easily degradable xylan in birch wood biomass compared to the case of other species. Furthermore, in the preparation of holocellulose from hardwood, it was suggested that some part of xylan are incorporated into cellulose and it makes another bottleneck for enzymatic saccharification.
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