The TPC of heat-treated turmeric rhizome (after
having been kept open for 1 h) at different temperatures
for different time periods are shown in Fig. 3. When
temperature and time of heat treatment increase, TPC
also increased. At 90 and 100 C, TPC values were
almost identical. TPC of the turmeric after drying
(turmeric powder) decreased when compared with that
of samples before drying (Fig. 2).