@article{oai:mie-u.repo.nii.ac.jp:00005725,
 author = {Funaoka, Masamitsu and 船岡, 正光 and Chiang, Vincent L and Chum, Helena L},
 journal = {三重大学生物資源学部紀要 = The bulletin of the Faculty of Bioresources, Mie University},
 month = {Mar},
 note = {application/pdf, Aspen (Populus tremuloides) chips were treated with methanol: water (70 : 30 by volume), at 165℃
for 2.5hours, with catalysts <special>(NaHSO4, H2SO4 and H3PO4)</special>, using a liquor-to-wood ratio of 4:1. The
structures of the resulting organosolv lignins were analyzed by the combination of nucleus exchange
reaction and nitrobenzene oxidation. Above the liquor pH 3.2, the compositions of dissolved lignins were
similar to that of original lignin and the condensation reaction did not occur extensively. However, with
decreasing liquor pH (below pH 3.0), the condensation occurred dramatically, forming diphenylmethane
type structures. The dissolved lignins were rich in guaiacyl units which were mainly of type Gb., オルガノソルブリグニンの有効利用に関する基礎的知見を得るため，Aspenチップがメタノール－水系で処理さ
れ，溶出リグニンの構造が蒸解液pHとの関連で論議された。pH3.2以上では，溶出リグニンの組織はオリジナル
リグニンと頼似していたが，pHの低下とともに縮合反応が開始され，Cα－アリール縮合構造が形成された。低pH
で流出するリグニンは，ダアイアイアシル単位にリッチであった。},
 pages = {37--46},
 title = {Structural Analysis of Acid-Catalyzed Organosolv Lignins by a Combination of Nucleus Exchange Reaction and Nitrobenzene Oxidation},
 volume = {6},
 year = {1991}
}