Method of Extraction Affects Pasting Properties of Dioscorea alata’s Starch

Ulyarti, Ulyarti and Nazarudin, Nazarudin and Fortuna, Dewi and Lavlinesia, Lavlinesia and Surhaini, Surhaini (2016) Method of Extraction Affects Pasting Properties of Dioscorea alata’s Starch. In: The first Green Development International Conference.

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The tuber of Dioscorea alata contains considerable amount of starch which can be used for human and industrial consumption. This research was conducted to investigate the effect of type of cultivar and treatment on the tuber before starch extraction on its pasting properties. There were two type of cultivars used in this experiment: yellow and purple tubers. Three different treatments were applied to the tuber prior to the starch extraction: control, steam blanching, and drying. “Control” means soaking the sliced tubers in water for 15 minutes, “steam blanching” means steaming the whole peeled tuber at 100oC for 5 minutes, and “drying” means heating the slices of tuber at 60oC for 20 hours followed by 12 hours soaking in water. The starches were examined for their pasting properties using RVA. The result showed that type of cultivar did not affect the final viscosity and setback of the starch while treatment significantly affected all pasting parameters of the starch paste (p<0.05). Final viscosity and setback in both cultivars decreased significantly with steam blanching. On the other hand, drying was found to increase pasting temperature of the starch from purple tuber.

Type: Conference (Paper)
Subjects: S Agriculture > S Agriculture (General)
Depositing User: Ulyarti
Date Deposited: 13 Nov 2020 02:16
Last Modified: 13 Nov 2020 02:16

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