The following conclusions were drawn from this
study:
1. When drying rice at a 60 C temperature (above the
glass transition temperature, Tg of rice), tempering
at 60 C increased HRY and reduced the number of
fissured kernels
Even though some samples, after extended tempering,
had a HRY equivalent to the HRY of the control
sample, these samples still showed a significantly
higher number of fissured kernels than the control
sample.
3. The tempering duration required for maintaining
kernel physical integrity (prevention of fissuring) is
longer than the tempering duration required for
maintaining a high HRY.
4. When drying rice at a temperature above Tg (60 C),
up to 2.9 PPMC for Bengal rice and 4.0 PPMC for
Cypress rice could be removed in one drying pass
without increasing fissuring levels when a tempering
duration of 80 and 160 min was used, respectively.
5. When drying rice at a temperature below Tg (40 C),
tempering was not necessary to maintain a high
HRY. However, tempering at 40 C did decrease