| Literature DB >> 19701727 |
Reichel Samuel1, Yunqiao Pu, Babu Raman, Arthur J Ragauskas.
Abstract
To reduce the recalcitrance and enhance enzymatic activity, dilute H(2)SO(4) pretreatment was carried out on Alamo switchgrass (Panicum virgatum). Ball-milled lignin was isolated from switchgrass before and after pretreatment. Its structure was characterized by (13)C, HSQC, and (31)P NMR spectroscopy. It was confirmed that ball-milled switchgrass lignin is of HGS type with a considerable amount of p-coumarate and felurate esters of lignin. The major ball-milled lignin interunit was the beta-O-4 linkage, and a minor amount of phenylcoumarin, resinol, and spirodienone units were also present. As a result of the acid pretreatment, there was 36% decrease of beta-O-4 linkage observed. In addition to these changes, the S/G ratio decreases from 0.80 to 0.53.Entities:
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Year: 2009 PMID： 19701727 DOI： 10.1007/s12010-009-8749-y
Source DB: PubMed Journal: Appl Biochem Biotechnol ISSN： 0273-2289 Impact factor: 2.926