in his studies of the heat expansion
of cooked starch postulated that salt helped
the expansion by facilitating the heat conduction
inward and the exit of moisture outwards. It is
interesting to note that, while salt increased the
expansion ratio of both steam-parboiled and dryheat-
parboiled rice, the former had an uneven
blistered surface but the latter was smooth. The
reason for this difference is not yet understood.