The DPPH value of raw
waxy black rice was 22.7 lmole TE/g. In cooked products (either
porridge or cooked rice), losses of DPPH values were indicated:
the DPPH values of 20 min, 25 min, 30 min, and 35 min were
22.2 lmole TE/g, 22.2 lmole TE/g, 21.0 lmole TE/g and 20.6 lmole
TE/g, respectively. Meanwhile, the DPPH value for cooked waxy
black rice was 20.7 lmole TE/g. The same phenomenon was shown
in non-waxy black rice which had a relatively higher DPPH value in
raw sample, with 25.0 lmole TE/g. Under thermal approaches, the
DPPH values of non-waxy one ranged from 24.2 lmole TE/g in porridge
with 20 min to 22.8 lmole TE/g in porridge with 35 min, and
the cooked rice had the DPPH value at 21.6 lmole TE/g.