| Abstract | The effects of cut-size on the yield and composition of air-classified fractions from lentils, Great Northern beans, fababeans, field peas, and navy beans were determined by air classifying twice-pin-milled flours. In general, an increase in cut-size resulted in: 1) an increase in the yield of the fine fraction, 2) an increase in the starch contents of the coarse and fine fractions, 3) a decrease in the protein contents of the coarse and fine fractions, 4) a decline in starch separation efficiency (SSE) and 5) improved protein separation efficiency (PSE). For a particular legume, the extent to which PSE could be improved by increasing the cut-size without inducing a marked decline in the protein content of the fine fraction was dependent upon the starch granule size distribution of that legume. Marked increases in the yield and starch content, and an equally sharp decline in the protein content, of the fine fraction occurred when the cut-size fell within the granule size distribution. |
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