caa a22 4500 463247205 CHVBK 20180405153329.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10086-006-0814-3 doi (NATIONALLICENCE)springer-10.1007/s10086-006-0814-3 Phenolization of hardwood sulfuric acid lignin and comparison of the behavior of the syringyl and guaiacyl units in lignin [Elektronische Daten] [Yasuyuki Matsushita, Hitomi Sano, Masanori Imai, Takanori Imai, Kazuhiko Fukushima] To study the behavior of hardwood sulfuric acid lignin (SAL) during phenolization, we compared the product yield, average molecular weight, methoxy content, and reactions of simple model compounds with those of softwood SAL, focusing on the difference between syringyl and guaiacyl units. The beech SAL reacted with phenol more readily than red pine SAL and yielded a larger soluble fraction of phenolized SAL. To investigate the difference in the phenolization activity of the syringyl and guaiacyl units in beech lignin, we prepared syringyl-nucleus-rich sulfuric acid lignin (S-rich-SAL) and guaiacyl-nucleus-rich sulfuric acid lignin (G-rich-SAL) from beech, which were subjected to phenolization. The results suggest that the syringyl unit in SAL had greater phenolization activity and its phenolized products were more soluble in acidic aqueous medium and introduced less phenol than the guaiacyl unit. Using model compounds, the study also showed that the syringyl unit had higher phenolization reactivity than the guaiacyl unit. The Japan Wood Research Society, 2006 Lignin nationallicence Acid hydrolysis lignin nationallicence Phenolization nationallicence Syringyl nucleus nationallicence Hardwood nationallicence Matsushita Yasuyuki Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut Sano Hitomi Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut Imai Masanori Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut Imai Takanori Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut Fukushima Kazuhiko Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut Journal of Wood Science Springer-Verlag 53/1(2007-02-01), 67-70 1435-0211 53:1<67 2007 53 10086 https://doi.org/10.1007/s10086-006-0814-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10086-006-0814-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matsushita Yasuyuki Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 700 1- Sano Hitomi Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 700 1- Imai Masanori Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 700 1- Imai Takanori Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 700 1- Fukushima Kazuhiko Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 773 0- Journal of Wood Science Springer-Verlag 53/1(2007-02-01), 67-70 1435-0211 53:1<67 2007 53 10086 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer