New Processing Technology Of Momordica Charantia L. & Its Antidiabetic Effect

Conventional technology is usually applied in the processing of Momordica charantia L. (MC) products, but conventional MC products have lots of shortages on its administration, taste, morphology and limitations of applying scope.In this article, various color-maintaining methods were evaluated and compared. The results showed as follows: the 0.5cm thick fresh MC slices were immersed in 3%Na₂CO₃ + 0.3%HCl solution for 4 hours, then air-dried at 85℃ for 6h. The products were sealed in a vacuum bag. After above processes, the green colour of MC was maintained satisfactorily. It could be preserved at room temperature without color fade or brown for one yearFour drying methods including air drying, vacuum drying, freeze drying and spray drying were evaluated and compared. The results showed that the best drying method was spray-drying, adding dextrin, its inlet air temperature was 155℃, outlet air temperature was 87℃. Acquired MC powder was excellent in color, weak in bitterness , low in water content and cost.Besides, the microencapsulation technology of MC powder was evaluated. The best microencapsulation method was: oil phase (corn embryo oil, monoglyceride and lecithin), water phase (water, stabilizer, casein and dextrin) and MC juice were mixed together and stirred, then milled to colloid, homogenizated and sray-dried, the ratio of dextrin and MC drying content was 2:1, the inlet air temperature was 155℃, outlet air temperature was 93⁹4℃.Through observing four kinds of drying powders of MC and microencapsulating process of MC with a microscope, it discovered that MC spray-drying powders existed in an agglomerating form, leading to good dissolution ability; among acquired microcapsule, MC cellulose and dextrin acted as continues phase, fat acted as distract phase and emulsifier distributed between water and oil, leading to a stable microencapsulation system.By oral administration, the results showed that high content group of MC had a significant antidiabetic effect on STZ diabetic rats (P<0.05), The hypoglycemic ratio was 40.3%, besides, it can resume growth of STZ diabetic rats (P<0.05).