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Abstract
Air-Aspirated Cleaning to Separate Sound from Preharvest-Sprouted Wheat. Cereal Chemistry 70:36-41
Bettge,A.D. and Pomeranz, Y.
An air-aspired wheat cleaner fractionated two sets of pre-harvest sprouted wheat (falling numbers 62-376) throughout the combined influences of aerodynamic drag, kernel volume, and kernel weight. One set was fractionated at a water column (WC) air pressure of 3.81 cm (1.5 in.); the other set was fractionated under WC air pressures of 2.54, 3.81, and 5.08 cm (1, 1.5, and 2 in., respectively). Each treatment resulted in a lifted fraction and a fraction passing through the air-aspired cleaner. The fractions, plus the original grain, were analyzed for physicochemical, a-amylase, and end-use parameters. The first set of samples showed significant physical and physicochemical differences between lifted and throughs fractions. The improvements were most meaningful for wheat of moderate Preharvest sprouting (falling numbers between 200 and 300). Throughs fractions produced better sponge cakes, in volume and texture, than the other fractions. The second set of samples exhibited a similar pattern: significant improvement in wheat of moderate prehavest sprouting but no meaningful improvements in either highly or lightly sprouted samples. Significant improvement was observed in fractions in samples of moderate preharvest sprouting. This improvement was most evident in the fraction passing through the aspirator at 5.08-cm WC air pressure. Aspiration at this pressure causes about 50% of the sample to be removed.
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