Enhancement of Bioactive Components in Mango Kernel Seed Oil Microencapsulated with Cassava Starch, Corn Starch, and Their Composites

Abstract

Mango Kernel seed oil extract contain high antioxidants activities. The study evaluated the influence of corn cassava starches, their blends, as well as the cell wall materials on the bioactive components of mango kernel seed extract microcapsule. Microencapsulation was prepared by using the cell wall materials together with mango kernel seed extract and water homogenized using a high-speed homogenizer at using high pressure at 15,000 rpm for about 10 min. the homogenate was later freeze dried, packaged and stored for 40 days. The total phenol content of non-freeze-dried homogenate samples ranged between 0.47-0.88 mg/100g, but reduced when stored for 40 days (0.36-0.67 mg/100g). The flavonoid content ranged from 0.16 to 0.26 mg/100g, but increased with storage from 0.30- 0.60 mg/100g. Both total phenol and flavonoid reduced with freeze drying (0.07 -0.69 and 0.03-0.04 mg/100g respectively) but picked during storage (0.36 – 0.67 and 0.30-0.60 mg/100g). Fourier transform infrared spectroscopy analysis indicated freeze dried samples of cassava and corn starch carrier contained more bioactive compounds than freeze dried samples with the blends as cell wall materials. Bioactive compounds functional group identified in the samples using FTIR include sp³ C-H, aldehyde C-H, ketone, amine, sp² C-H, strong alkyl C-O, medium alkyl C-O, weak alkyne, alcohol O-H and Carboxylic acid. Use of cassava starch as a cell wall material preserves the bioactive compound better than using composite starch when freeze dried and in stored.