et
power
input
to
the
extruder
was
determined
from
the
torque
and
angular
velocity
measure-
ments.
For
physico-chemical
analyses,
extrudates
were
dried
at
40'C
and
ground
in
a
micro-mill
(Powdertec
3090,
Tecator,
Inc.,
Germany)
to
pass
through
a
0.5-mm
sieve
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