期刊
CARBOHYDRATE POLYMERS
卷 100, 期 -, 页码 2-8出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.06.007
关键词
Transformation; Irreversible; Celluloses; Elevated; Temperatures; Native; Accessibility; Aggregation
资金
- BioEnergy Science Center (BESC)
- DOE Office of Biological and Environmental Research (BER) under the Genomes to Life (GTL) program
- DOE Office of Science ASCR SciDAC program award [DE-AC36-080028303]
- Wisconsin Energy Independence Fund
Current research, basic and applied, assumes that observed recalcitrance of celluloses is an inherent characteristic associated with their state of aggregation in their native state; it is thought that processes of isolation remove other components of plant cell walls leaving the celluloses unchanged, even though elevated temperatures are routinely used during isolation. Since temperature elevation is known to influence the structures of all polymers, it is important to explore its influence on the character of isolated celluloses, almost always assumed to be still in their native state. Deuterium exchange is a measure of accessibility of reactive sites in celluloses. We report significant reduction in accessibility to deuterium and other probe molecules for celluloses isolated at ambient temperature and then exposed to elevated temperatures. Our results indicate that native celluloses, which are highly ordered biological structures, are irreversibly transformed and develop polymeric semi-crystalline character upon isolation at elevated temperatures. (C) 2013 Elsevier Ltd. All rights reserved.
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