Hydration Dependence of the Wood-Cell Wall Structure inPicea abies.A Small-Angle X-ray Scattering Study

Autor:	SE Tschegg, HF Jakob, Peter Fratzl
Rok vydání:	1996
Předmět:	Polymers and Plastics biology Scattering Small-angle X-ray scattering Organic Chemistry Picea abies Fibril biology.organism_classification Inorganic Chemistry Cell wall chemistry.chemical_compound Crystallography Sphere packing chemistry Chemical physics Materials Chemistry Native state Cellulose
Zdroj:	Macromolecules. 29:8435-8440
ISSN:	1520-5835 0024-9297
Popis:	Hydration dependent structural changes at the nanometer level were investigated in the natural wood cell of Picea abies. Using the technique of small-angle X-ray scattering (SAXS), it was possible to investigate the same specimens at different degrees of hydration, x, in a nondestructive way, which allowed us to separate the scattering from pores from the scattering of the cell wall itself. For specimens dried below the fiber saturation point, xF, the scattering from pores and other cavities dominated and considerable changes of the cell-wall structure occurred. In the native state (for x > xF), however, the structure of the cell wall was independent of the hydration. The structure function describing the relative arrangement of the cellulose fibrils was obtained for the native cell wall. It was in quantitative agreement with the prediction from a hard-disk model with packing density 0.3, corresponding to a typical spacing between fibril centers of about 40 A.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6ff2d2be8c804edca43e1be3e98f44ec https://doi.org/10.1021/ma9605661 Zobrazit plný text záznamu