|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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