Abstract:
Studied on blanching time of palmyra palm (Borassus flabellifer L.) pulp, showed that heating at 85 oC for 5 minutes could inhibit peroxidase and b-carotene were most preserved. Heating effect and storage conditions on b-carotene and color of dried pulp were also studied. Blanched and unblanched pulp kept in laminated aluminum foil bags for 4 weeks showed that the color of dried pulp faded. If those two types of dried pulp were kept under vacuum, their color could be better preserved. Comparing of drying method of palmyra palm pulp by tray dryer, drum dryer, vacuum dryer and freeze dryer, it was found that palmyra palm pulp powder form freeze dryer was the best in color, b-carotene content, WAI and rehydration. Production of kanom tan was based on a basic formula composed of rice fluour 22.52%, palmyra and pulp 9.23%, coconut milk 40.80%, sugar 27.35% and salt 0.10%. This formulation was calculated to kanom tan flour mix on dry basis. The optimum content of yeast and baking powder in kanom tan flour mix were each 0.5% of total weight. The formulation of kanom tan flour mix was rice flour 37.82%, palmyra palm powder 1.83%, coconut milk powder 13.36%, sugar 45.96%, salt 0.17%, yeast 0.5% and baking powder 0.5%. Kanom tan flour mix was packed under vacuum in laminated aluminum foil bags with oxygen absorber for 3 months at room temperature, showed that the quality of flour mix could be preserved.