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Crystal Structure of Hydrated Potato Starch
Author(s) -
Cleven R.,
van Den Berg C.,
van der Plas L.
Publication year - 1978
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19780300703
Subject(s) - starch , potato starch , diffraction , superstructure , crystallography , hexagonal crystal system , crystal structure , materials science , chemistry , ice crystals , macromolecule , organic chemistry , optics , biochemistry , physics , thermodynamics
The X‐ray diffraction pattern of Nägeli‐treated potato starch was examined and changes in the diffraction pattern of native potato starch were measured for hydrations ranging from 0 to 50%. The fine structure of the diffraction pattern revealed many lines of very weak intensity, superimposed on a “basic structure” with hexagonal unit cell. It is suggested that that a “superstructure” exists in fully hydrated potato starch. A packing arrangement of hydrated potato starch is proposed in which every string of six helical macromolecular chains encloses a cylindrical cavity filled with water structured like cubic ice.