The evolution of red color loss in the pasteurized pomegranate
juice samples during storage is shown in Fig. 1. Just after heat
treatments, the measuring of A520 indicated that in clarified juice
(Fig. 1A) the loss of red color due to the LTP treatment was 3% while
that produced by HTP treatment reached values of 22%. However, in
cloudy juice (Fig. 1B) the loss of red color due to pasteurization
treatments was similar in both conditions reaching values of 42%.
The losses of red color followed a similar pattern in both types of
juice (Fig. 1A and B), but the juices that were stored at 5 C had a
lower and slower loss of red color than those stored at 25 C. The
cloudy juice LTP-treated and stored at 25 C for 45 days lost 74% of
red color with respect to the starting point (Fig. 1B). The same heattreated
juice stored at 5 C for 120 days lost 55%. The cloudy juice
HTP-treated and stored at 25 C lost 85% of red color, while at 5 C
lost 70%. Similarly, the clarified juice LTP-processed and stored at
25 C lost 77% of initial red color (Fig.1A), whilewhenitwas stored at
5 C, lost 40% only. The clarified juice HTP-treated and stored at 25 C
lost 80% of red color, but when itwas stored at 5 C, the losswas 53%.
As the A520 values, the TCDs of the juice depended largely on the
storage temperature (Fig. 2). LTP-treated cloudy juice stored at
25 C for 45 days showed a discoloration of approximately 61%
compared to its original color, while that stored at 5 C for 120 days
lost 50%. HTP-treated cloudy juice stored at 25 C lost 60% of TCD,