The foam expansion was
significantly influenced by levels of the egg albumin at (p≤0.01). Foam density was
measured and expressed in g cm-3. The resulting foams were dried at air temperatures
of 60, 65 and 70°C with foam thickness of 2, 4, 6 and 8 mm under air flow rate of 2.25
cu.m min-1. Lower drying temperature and higher foam thickness resulted in longer
drying time. Biochemical and sensory properties of fresh papaya fruit and reconstituted
juice from foam-mat dried papaya powder were determined. Biochemical analysis
results showed a significant (p≤0.05) reduction in ascorbic acid, β-carotene and total
sugars in the foamed papaya dried product at higher drying temperatures (65 and
70°C) and higher foam thickness (4, 6 and 8 mm) due to destruction at higher drying
temperature and longer drying time. There was no significant change in other biochemical
constituents such as TSS, pH and acidity.