미생물 펄프화시 trembling aspen의 화학적 성분 변화 = Changes of chemical components of trembling aspen during biopulping

다국어 초록 (Multilingual Abstract)

Trembling aspen wood (Populus tremuloides) was treated with white rot fungi Ceriporiopsis subvermispora for 1, 2, 4 and 6 weeks. On a laboratory scale, steaming, cooling, and fungal inoculation were performed in a batchwise fashion. As fungal decay advanced on, lignin contents were decreased gradually up to 20 % after 6 weeks, whereas MeOH extracts were significantly increased. Alkali solubility of cell wall residues was improved until 4-weeks of fungal treatment, but additional treatment did not give any effects. Milled wood lignins (MWLs) were isolated from the each decayed wood by Bjoerkman procedure and subjected to thioacidolysis and analytical pyrolysis to investigate the modification of lignin structures during fungal incubation. Thioacidolysis revealed that the yields of trithioethylated C6C3 monomers, a parameter for frequency of β-O-4 linkages in lignin, were substantially reduced in purified lignins from each decayed wood as a function of periods of fungal treatment and the reduction of β-O-4 linkages reached 20 % after 6 weeks.
대구대학교 생명과학연구 제3권 제1호 (2004. 07)
Furthermore, S/G ratios estimated by thioacidolysis demonstrated that syringyl-type lignin was much favorably degraded than guaiacyl-type lignin by C. subvermispora.

목차 (Table of Contents)

• 목차
• ABSTRACT
• 1. 서론
• 2. 재료 및 방법
• 3. 결과 및 고찰
• 4. 결론
• 참고문헌