The hydrocolloids showed an improvement in the dough rheological
characteristics of whole wheat dough. In general they helped
in retention of moisture in the puri and hence remained softer and
pliable. Some of them helped in reducing the oil content of puri.
Among the hydrocolloids used, addition of CMC showed highest
moisture retention, whereas addition of GG showed lowest oil
uptake. SEM studies revealed that in the dough samples, starch
granules were coated with hydrocolloids and were embedded in the
thick protein matrix and in puri samples; starch granules were
partially gelatinized but, retained the identity in the continuous
protein matrix. The mass transfer studies confirmed that the
hydrocolloids helped in retaining moisture during frying. The rate of
oil uptake and the mass transfer co-efficient value for oil was higher
in case of CON sample when compared to GG sample, indicating that
the hydrocolloids helped in reducing the oil uptake in puri.