Properties of damaged starch granules: III. Microscopy and particle size analysis of undamaged granules and remnants

Tester, R.F.; Morrison, W.R.; Gidley, M.J.; Kirkland, M.; Karkalas, J.

Journal of Cereal Science 20(1): 59-67

1994


ISSN/ISBN: 0733-5210
DOI: 10.1006/jcrs.1994.1045
Accession: 009259686

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Abstract
Wheat and maize starches were ball milled to obtain various levels of damaged starch, which was readily digested with fungal alpha-amylase. The undamaged portion comprised surviving native starch granules (N) and birefringent remnants (R) of larger granules that had been partially damaged. Scanning electron microscopy of the more damaged samples showed that N material consisted of only medium- and larger-sized granules, while R material was either hollow shells of medium to large granules or small irregular fragments. Particle size analysis confirmed that small B-granules in wheat starch were more likely to be completely damaged than large granules.

Properties of damaged starch granules: III. Microscopy and particle size analysis of undamaged granules and remnants