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Fibrillar Starch in Ultrathin Sections of Potato
Author(s) -
Wetzstein H. Y.,
Sterling C.
Publication year - 1977
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.19770291102
Subject(s) - starch , molecule , potato starch , materials science , viscosity , composite material , chemical engineering , chemistry , organic chemistry , engineering
Ultrathin sections of raw potato embedded in Spurr's “low viscosity” resin show radial splitting of the starch grains into long bands, presumably evoked when the resin is expanded by hydrocarbon vapor after sectioning. There are no concentric lamellae of starch in these sections, and no evidence of tangentially extended layers of refolded molecules was found. Thus, the principal units of organization in the starch grain are radially extended starch molecules and/or radial fibrillar clusters of these molecules.