𝔖 Bobbio Scriptorium
✦   LIBER   ✦

X-Ray diffraction of ethylenediamine–amylose complex

✍ Scribed by T. D. Simpson

Book ID
102763034
Publisher
Wiley (John Wiley & Sons)
Year
1970
Tongue
English
Weight
504 KB
Volume
9
Category
Article
ISSN
0006-3525

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Solutions of amylose in ethylenediamine yield a crystalline film complex upon evaporation of solvent. The x‐ray analysis indicates the presence of a tetragonal‐shaped cell with a symmetry approximating that of space group P2~1~2~1~2~1~. The amylose sixfold helix has a diameter of 13.3 Å and a translation period of 8.0Å. Chemical and physical analyses support a complexing ratio of one ethylenediamine molecule to every two glucose units. The structure is nearly identical to any amylose–dimethyl sulfoxide complex previously examined. The square mode of packing arrangement appears to result from complexation between amylose chains. Such complexing indicates a much greater degree of amylose interaction than is observed in amylose complex structures having a hexagonal close‐packing arrangement.

📜 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

Monitoring the crystallization of amylos
Monitoring the crystallization of amylose–lipid complexes during maize starch melting by synchrotron x-ray diffraction
✍ P. Le Bail; H. Bizot; M. Ollivon; G. Keller; C. Bourgaux; A. Buléon 📂 Article 📅 1999 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 333 KB 👁 2 views

Most starch granules exhibit a natural crystallinity, with different diffraction patterns according to their botanical origin: A-type from cereals and B-type from tubers. The V polymorph results essentially from the complexing of amylose with compounds such as iodine, alcohols, or lipids. The intens