Physicochemical properties of resistant starch type III from sago starch at different palm stages

In this study, resistant starch type III (RS3) was produced from different sections, the top and bottom part of Metroxylon sagu palm at different growth stages namely, Plawei Manit, Bubul and Angau Muda. Sago starch was subjected for two cycles of autoclaving, debranching by pullulanase and cooling for the production of resistant starch. The physicochemical properties of sago RS3 studied were the starch morphology by Scanning Electron Microscopy (SEM), resistant starch content, amylose content, swelling power and solubility as influenced by different palm growth stages and sections. Significant differences in the resistant starch content between 23.89% and 41.62% as well as amylose content which yielded 27.22% to 35.74% from different growth stages were observed (p < 0.05). Granules of resistant starch showed irregular and rough surface structure as compared to smooth granular surface, oval shaped of native sago starch. There are significant variations (p < 0.05) observed in the results of swelling power and solubility from 7.98 g/g to 19.41 g/g for swelling power and from 5.63% to 15.10% for solubility from the different growth stages.
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research