Investigation of lignins structure in cereal crops by chemical degradation methods

Billa, E; Koukios, EG; Monties, B

dc.contributor.author	Billa, E	en
dc.contributor.author	Koukios, EG	en
dc.contributor.author	Monties, B	en
dc.date.accessioned	2014-03-01T01:13:51Z
dc.date.available	2014-03-01T01:13:51Z
dc.date.issued	1998	en
dc.identifier.issn	0141-3910	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12750
dc.subject	Maize	en
dc.subject	Sorghum	en
dc.subject	Reaction Time	en
dc.subject	Wheat Straw	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Benzene	en
dc.subject.other	Crops	en
dc.subject.other	Degradation	en
dc.subject.other	Oxidation	en
dc.subject.other	Structure (composition)	en
dc.subject.other	Temperature	en
dc.subject.other	Alkaline nitrobenzene oxidation	en
dc.subject.other	Cereal crops	en
dc.subject.other	Maize	en
dc.subject.other	Sorghum	en
dc.subject.other	Thioacidolysis	en
dc.subject.other	Wheat straw	en
dc.subject.other	Lignin	en
dc.title	Investigation of lignins structure in cereal crops by chemical degradation methods	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0141-3910(97)00152-3	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0141-3910(97)00152-3	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The monomeric composition of in situ lignins in sorghum, maize and wheat straw stems is investigated by two chemical degradation methods: thioacidolysis and alkaline nitrobenzene oxidation. It is shown that the structural information obtained in the case of lignin characterisation by alkaline nitrobenzene oxidation is strongly dependent on the reaction conditions, namely the temperature and the reaction time, as indicated by the significant variations in the yields of aromatic aldehydes that correspond to the three main constitutive lignin units, p-hydroxyphenyl (H), guaiacyl (G) and syringyl (S), Moreover, the complementary character of the two methods that stems from their different specificities is discussed in view of the molecular heterogeneity of lignins. Finally, the results obtained indicate a significant structural variability of the lignins of the three crops examined. (C) 1998 Elsevier Science Limited. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Polymer Degradation and Stability	en
dc.identifier.doi	10.1016/S0141-3910(97)00152-3	en
dc.identifier.isi	ISI:000073938300012	en
dc.identifier.volume	59	en
dc.identifier.issue	1-3	en
dc.identifier.spage	71	en
dc.identifier.epage	75	en