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Studies on Oat Starch with a Celloscope: Granule Size and Distribution
Author(s) -
Mäkelä M. J.,
Laakso S.
Publication year - 1984
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.19840360503
Subject(s) - granule (geology) , starch , chemistry , food science , materials science , composite material
Detailed granule size distribution in oat starch was determined with a Celloscope. Maximum granule number appeared at a diameter range of 1.9‐2.4 μm and corresponding maximum volume was at 6.0‐7.6 μm. In light of the observed high reproducibility of the Celloscopic technique it was concluded that no aggregation of individual granules occurred at concentrations below 1 mg/ml. The Celloscopic data based on direct counting of granules as a function of their shape‐independent volume. It could be demonstrated that two different average granule sizes, 3.0 and 6.4 ‐ 7.4 μm, can be obtained depending on whether the sizings are based on estimation of the granule's cross‐sectional areas or directly the effective volumes. Only the latter approach was capable of revealing variety‐specific differences in the average granule masses. For rapid starch sizings of samples containing granules from any of the size ranges within the distribution diagram a rapid “coarse” counting method was developed.