| Moisture changes in the plant cell wall force cellulose crystallites to deform. | |
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MedLine Citation:
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PMID: 20438848 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Nano-crystallite deformation of cellulose microfibrils in the secondary cell wall layer of spruce wood tracheids was observed during de- and rehydration experiments below the fibre saturation point. A quantitative analysis of the (004), (200) and the (110)/(11 0) doublet X-ray diffraction peaks revealed longitudinal contraction, lateral expansion and changes in the monoclinic angle of the cellulose unit cell during drying of wood fibres. Experiments on unfixed samples as well as the simultaneous application of mechanical tensile and dehydration stress to samples hold at constant length showed two deformation mechanisms of different nature and magnitude. The first mechanism depends on the relative wood moisture content and the second one on the macroscopic tensile stress. These findings imply a new perspective on the role of water adsorption perceiving a hydration-induced structural change of cellulose crystal structure as a major driving force for deformation. |
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Authors:
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S Zabler; O Paris; I Burgert; P Fratzl |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-05-08 |
Journal Detail:
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Title: Journal of structural biology Volume: 171 ISSN: 1095-8657 ISO Abbreviation: J. Struct. Biol. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-06-14 Completed Date: 2010-09-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9011206 Medline TA: J Struct Biol Country: United States |
Other Details:
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Languages: eng Pagination: 133-41 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier Inc. All rights reserved. |
Affiliation:
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Technische Universität Berlin - Werkstofftechnik, EB 13, Strasse des 17. Juni 135, D-10623 Berlin, Germany. simon.zabler@tu-berlin.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cell Wall
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chemistry*,
metabolism* Cellulose / chemistry*, metabolism* Microfibrils / chemistry*, metabolism* Picea / chemistry, metabolism X-Ray Diffraction |
| Chemical | |
Reg. No./Substance:
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9004-34-6/Cellulose |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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