Name : [in Japanese]
Location : [in Japanese]
Date : August 04, 2022 - August 05, 2022
Pages 194-195
Semi-flow hydrothermal treatment of beech (Fagus crenata) wood was used to fractionate its cell wall component into cellulose-rich insoluble residue and lignin-rich precipitates, and the evaluation of the enzyme-medicated digestibility of the insoluble residue and the photoluminescence properties of the precipitate were investigated. For the residue, enzymatic saccharification was greatly enhanced by the improvement of enzyme accessibility. In contrast, the precipitates dissolved in DMSO and its solution showed obvious photoluminescence by controlling the chromophore distances. Furthermore, 2-naphthol, a carbocation scavenger that inhibits lignin recondensation, was impregnated into wood flour prior to the hydrothermal treatment. As a result, the digestibility of cellulose component in the residue was improved since the formation of unproductively-binding between lignin and enzyme was suppressed along with the suppression of lignin recondensation. In contrast, the photoluminescence intensity of the precipitates was significantly enhanced, suggesting that 2-naphthol bound to the side-chain of lignin molecule contributed to the photoluminescence properties of the lignin. This information would give us a clue to utilize the whole cell wall component.