Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 29, Issue 3, Pages 193-202Publisher
ELSEVIER
DOI: 10.1016/S0141-8130(01)00167-2
Keywords
Acetobacter; bacterial cellulose; cell wall; X-ray scattering; environmental scanning electron microscopy
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The structure of composites produced by the bacterium Acetobacter xylinus have been studied in their natural. hydrated. state. Small-angle X-ray diffraction and environmental scanning electron microscopy has shown that the ribbons have a width of 500 A and contain smaller semi-crystalline cellulose microfibrils with an essentially rectangular cross-section of approximate to 10 x 160 Angstrom (2). Incubation of Acetobacter in xyloglucan or pectin results in no changes in the size of either the microfibrils or the ribbons. Changes in the cellulose crystals are seen upon dehydration of the material, resulting in either a reduction in crystal size or an increase in crystal disorder. (C) 2001 Published by Elsevier Science B.V.
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