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Scanning Electron Microscopy of Wheat Starch II. Structure of Granules Modified by Alpha‐Amylolysis – Preliminary report
Author(s) -
Evers A. O.,
McDermott E. E.
Publication year - 1970
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.19700220107
Subject(s) - granule (geology) , starch , scanning electron microscope , penetration (warfare) , chemistry , amylase , wheat starch , electron microscope , alpha amylase , chemical engineering , food science , materials science , biochemistry , composite material , enzyme , optics , physics , mathematics , operations research , engineering
Abstract Wheat starch granules were subjected to alpha‐amylolysis after which they were examined in the Scanning electron microscope. Much variation exists among starch granules; thus conclusions based on the observation of the precise mode of α‐amylase attack on a few individual granules may not be generally applicable. It has been found, however, that where a groove is present in a granule, α‐amylase attack generally occurs here, complete penetration either occurring exclusively at this feature or accompanying penetration at apparently randomly located sites on the major surfaces. This preliminary investigation of starch granules attacked by amylase has provided new information which augments the results of studies by other microscopical methods. Observation of the detailed structure of the equatorial groove in modified granules is particularly relevant to a better understanding of this feature in starch granules.