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Fibrillar Structure in Lintnerized Potato Starch by Scanning Electron Microscopy
Author(s) -
Davis C. Sterling
Publication year - 1971
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.19710230602
Subject(s) - scanning electron microscope , fracture (geology) , starch , materials science , ridge , composite material , ring (chemistry) , electron microscope , morphology (biology) , concentric , crystallography , chemistry , geometry , optics , geology , physics , mathematics , paleontology , biochemistry , organic chemistry
A study of Lintnerized potato starch has been made with the scanning electron microscope. All fracture faces, etched with the dilute acid solution, show a radial fibrillar system as the structural foundation of the starch grain. No evidence of isodiametric granules was found. Ringlike areas, corresponding to tangentially fractured concentric lamellae of the grain, are not uncommon and are made evident by a change in slope of the fracture face at these rings. The fibrillar system, centered at the middle of a ring, radiates outward from that point and traverses the ring without obvious interruption. The longest fibrillar ridge had a length of 14 μm.