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Title
Chemical composition crystallinity and crystallite cellulose size in Populus hybrids and aspen
Authors
Xiao-Juan Jin and D. Pascal Kamdem
Received
June 26, 2009
Published
Volume 43 Issue 7-8 July-August
Keywords
Populus hybrid, aspen, cellulose, crystallinity
Abstract
The chemical composition (holocellulose, lignin, extractives and ash) of four Populus hybrid clones and an aspen sample was investigated. Statistical analyses indicated that no significant differences existed among the four Populus hybrid clones, although a notable discrepancy regarding the holocellulose content was found between aspen and the other four Populus hybrid clones. X-ray was used to study the crystallinity and the average thickness of cellulose crystallites in the four Populus hybrids and in aspen; the crystallinity index (Ic) ranged between 36.1 and 51.5%, and a negative correlation was found between the diameter breast height (DBH) and Ic (-0.85); thickness of the crystallite cellulose ranged from 5.67 to 7.09 nm, with no significant difference in the tree samples. No definite tendency was noticed, which is an obvious effect of wood ash application on DBH and Ic, and also on the thickness of crystallite cellulose.
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