𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Crystalline structure in oriented fibers of KBr–amylose

✍ Scribed by John J. Jackobs; Robert R. Bumb; Bert Zaslow

Publisher
Wiley (John Wiley & Sons)
Year
1968
Tongue
English
Weight
569 KB
Volume
6
Category
Article
ISSN
0006-3525

No coin nor oath required. For personal study only.

✦ Synopsis

The study of the structure of KSr-arnylose begun by Senti and Witnauer has been extended by a three-dimensional crystallographic analysis and by stereochemical considerations. Location of Br-at (0.200, 0.200, 0.000) and K+ a t (0.540, 0.540, 0.000) was obtained from the three-dinlensional map of vector interactions. By using known parameters for the i,-glucose residue and accurate space-filling models, an amylose helix was constructed to meet the fiber repeat spacing of 16.1 A. The helix was determined to be left-handed, and the correct space group for KBr-amylose is P432,2. Placement of the helix in the unit cell resulted from structure factor calculations;

iiiinima in the grid of R values were checked with space-filling models to establish the final structure. Both ions are located in a waterlike environment. The oxygen atoms 0(2), 0(3), and O(4). from glucose residues on adjacent chains coordinate around K+.

📜 SIMILAR VOLUMES

X-ray diffraction of oriented amylose fi
X-ray diffraction of oriented amylose fibers. III. The structure of amylose–n-butanol complexes
✍ M. E. Hinkle; H. F. Zobel 📂 Article 📅 1968 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 621 KB

## Synopsis Complexes of amylose with n-butanol were prepared both as crystalline precipitates and as oriented fibers. These complexes were subjected to x-ray analysis, their unit cells were calculated, and the space group of F212121 was confirmed. n-Butanol complexes exist in both hydrated and an

Crystalline structure of developing cott
Crystalline structure of developing cotton fibers
✍ Xiao-Ping Hu; You-Lo Hsieh 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 715 KB

The crystalline structure of dried cotton fibers at varying development stages has been investigated using wide angle x-ray diffraction (WAXS) techniques. The cellulose I crystalline structure has been confirmed on dried SJ-2 Acala cotton fibers collected at varying developmental stages and at matur