(Kesan Polisakarida Agar daripada Rumpai Laut Merah (Gracilaria changii) ke atas Sifat .... previously reported by Selby and Wynne (1973) who also stated that ...
Sains Malaysiana 38(3)(2009): 341–345
Effect of Red Seaweed Polysaccharides Agar (Gracilaria changii) on Thermal Properties and Microstructure of Wheat Starch (Kesan Polisakarida Agar daripada Rumpai Laut Merah (Gracilaria changii) ke atas Sifat Terma dan Mikrostruktur Kanji Gandum) P. KHAIRUL FAIZAL, H. ROHASMIZAH, B. ABDUL SALAM & A.S. NORRAKIAH
ABSTRACT
This study has been carried out on the mixture of Gracilaria changii agar (0.1%, 0.2%, 0.4% and 0.8%) with wheat starch. Scanning electron microscopy (SEM) was performed for morphology observation, and starch thermal analysis were carried out to determine the properties of gelatinization and retrogradation. Proximate analysis has been determined for isolated wheat starch and agar. Through SEM, interaction was first observed at 64°C for 0.4% agar but at 0.8% of agar, a more extensive bridging was formed which enveloped the starch granules. Differential scanning calorimetric (DSC) result shows that the addition of agar decreased the onset temperature (To) of gelatinization significantly (p
