ケナフ木質部をボリエチレングリコールで加溶媒分解して、ウレタン材料のボリオール成分として活用することを試みた。これまで植物を加溶媒分解し石油代替原料を取得する研究は可能な限り溶解化する点に注力が注がれてきた。本検討ではケナフに含まれるセルロース繊維分を梢極的に未溶解分として残す加溶媒分解を目指した。この手法により、残存繊維分が補強剤の役割を果たす、いわばセルロース繊維強化型ポリウレタン材料の創製を期待した。 本論文では、上記に合目的的なポリオール原料を得るに最適な加浴媒分解条件を報告する。検討因子は、加溶媒分解における溶媒量（液比)、添加酸触媒量、及び反応時間である。残渣率、残渣分のFT－IR分析、及び溶解分の水酸基価測走の結果を考慇すると、液比＝1、酸触媒量＝0.25 mMol/試料・g、反応時間=30分が標記目標に適当な条件と考えられた。

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Some enzymes were immobilized in an inner layer of a filter paper using the osmotic action of a contact dehydrating sheet (CDS). CDS was examined to determine if the efficiency and rapidity of an enzyme reaction could be improved, thereby making better of the preparation of an immobilized-enzyme membrane. The activity of the membrane, in which an enzyme exists in its layer, was compared with that of a conventional enzyme adsorption membrane. pH was examinedmodulated for the enzyme to obtain a higher migration rate into the membrane. The membrane in which layer an enzyme exists and the enzyme adsorption membrane were placed on the oxygen electrode. The glucose sensor, the D-amino acid sensor and the sarcosine sensor were constructed. The use of CDS successfully increased enzyme migration into the membrane and enhanced the signal intensity per unit of enzyme. From this point of view, there is a very strong possibility that biosensors utilizing an immobilized-enzyme membrane prepared with CDS can be developed. This is the first report on the application of CDS to bioengineering fields except for food wrapping.

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