Starch retrogradation was reduced and amylose-lipid complexation occurred on addition of coconut oil as suggested by
Differential Scanning Calorimetry.
After 20 days of storage, weight loss was 1.78% less for starch/glycerol/lipid (S/G/L) coated and 3.53% less for starch/glycerol/lipid/antioxidant (S/G/L/A) coated tomatoes ascompared to control.
Titratable acidity was 0.262 0.007% and 0.337 0.003% and pH was 4.62 0.013 and 4.27 0.015 for control and S/G/L/A coated tomatoes, respectively. TSS (Brix) increased with storage in all samples but S/G/L/A coated tomatoes exhibited 0.5 Brix less TSS than the control.
Reducing sugars and ascorbic acid increased with storage initially and thereafter decreased later on with control showing
maximum fall and S/G/L/A and S/G/L recording lowest fall, in that order.
Coconut oil and tea leaf extract in the edible coating clearly delayed ripening effects on tomatoes. The coconut oil and tea extract also exhibited microbe-barrier property.