Premium
Microscopic Observation and X‐Ray Diffractometry of Heat/Moisture‐Treated Starch Granules
Author(s) -
Kawabata Akiko,
Takase Naoaki,
Miyoshi Emako,
Sawayama Shigeru,
Kimura Toshiaki,
Kudo Kenichi
Publication year - 1994
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.19940461204
Subject(s) - starch , scanning electron microscope , moisture , potato starch , materials science , corn starch , water content , electron microscope , food science , crystallography , composite material , chemistry , chemical engineering , optics , geology , physics , geotechnical engineering , engineering
Heat/moisture‐treated potato and corn starch granules were observed by microscopy and X‐ray diffraction patterns were obtained. A scanning electron microscope (SEM) photograph of the cross section of the heat/moisture‐treated potato and corn starch granules showed a large hollow area about 1/3 of the diameter at the center of the starch granules and a layered structure resembling growth rings. From the X‐ray diagrams it was confirmed that heat/moisture‐treatment caused an alteration from the B‐type in the direction an A‐type structure in potato, whereas corn starch did not change and maintained an A‐type structure. The enzymatic digestibility of heat/moisture‐treated starch was found to be less resistant than that of native starch.