Journal ArticleDOI
Positions des atomes dans le nouveau modèle spatial de la cellulose
Kurt H. Meyer,Lore Misch +1 more
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Partant d'un modele de la cellobiose, dans lequel les angles and distances interatomiques sont en harmonie avec les donnees actuelles, un nouveau modele spatial de la cellulose a ete construit.Abstract:
Partant d'un modele de la cellobiose, dans lequel les angles et les distances interatomiques sont en harmonie avec les donnees actuelles, un nouveau modele spatial de la cellulose a ete construit. Dans ce modele, les deux chaines cellobiosiques qui traversent la maille elementaire parallelement a l'axe, b, ont des directions opposees. Les parametres des atomes ont ete trouves a l'aide des intensites relatives des interferences aux Rayons X.read more
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Crystal Structure and Hydrogen-Bonding System in Cellulose Iβ from Synchrotron X-ray and Neutron Fiber Diffraction
TL;DR: In this article, the crystal and molecular structure of cellulose Iβ were determined using synchrotron and neutron diffraction data recorded from oriented fibrous samples prepared by aligning cellulose microcrystals from tunicin.
Journal ArticleDOI
Cellulose crystallinity index: measurement techniques and their impact on interpreting cellulase performance
TL;DR: Four different techniques incorporating X-ray diffraction and solid-state 13C nuclear magnetic resonance (NMR) were compared using eight different cellulose preparations and it was found that the simplest method, which is also the most widely used, and which involves measurement of just two heights in the X- Ray diffractogram, produced significantly higher crystallinity values than did the other methods.
Journal ArticleDOI
Idealized powder diffraction patterns for cellulose polymorphs
TL;DR: In this paper, powder diffraction patterns from cellulose Iα, Iβ, II, IIII, and IIIII were calculated based on the published atomic coordinates and unit cell dimensions contained in modified "crystal information files" that are supplied in the Supplementary Information.
Journal ArticleDOI
Cellulose: the structure slowly unravels
TL;DR: A review of the information gathered on cellulose structure over the last few decades can be found in this paper, where the authors attempt to bring together basic and complex information which has been gathered on the structure of native cellulose.
Journal ArticleDOI
Cellulose nanowhiskers: promising materials for advanced applications
TL;DR: In this paper, the production, structure, properties and applications of cellulose nanowhiskers of rod-like structures have been discussed, and a wide range of chemical modifications have been described, including 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-mediated oxidation, polymerisation from the surface using Reversible Addition-Fragmentation chain Transfer (RAFT) and Atom Transfer Radical Polymerisation (ATRP), and rendering of the surface with cationic and anionic charge.
References
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Journal ArticleDOI
Sur la constitution et la structure de la chitine
Kurt H. Meyer,Georg W. Pankow +1 more