  2001 AACC Annual Meeting Charlotte, North Carolina October 14-18, 2001 Charlotte Convention Center  |
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Structure-property relationships in groats: Influence on groat breakage. J. A. ENGLESON and R. G. Fulcher. University of Minnesota, Dept. of Food Science and Nutrition, St. Paul, MN 55108.
Groat breakage during impact-dehulling has negative effects on milling yield and finished product quality. The primary objectives of our investigations included development of structure-property relationships and identification of parameters governing groat breakage. Breakage from laboratory impact-dehulling was determined manually. Groat stiffness and toughness were calculated from compression tests using a TA.XT2i texture analyzer and groat length and width data, which were obtained from digital image analysis. Assayed groat characteristics included: moisture, phenolic acids, beta-glucan, starch, protein, fat, and ash. The rapid Dipix I440F Microscope Imaging System provided additional structural information, and hull damage after manual dehulling was quantified using digital image analysis. Multiple linear regression and partial least squares regression related groat microstructure and specific mechanical properties to groat breakage. These multivariate approaches resulted in predictive models of groat breakage, which should be useful in commercial oat milling operations.
Copyright 2001
The American Association of Cereal Chemists