Karakteristik Pati Sagu yang Dimodifikasi dengan Perlakuan Gelatinisasi dan Retrogradasi Berulang Characteristics of Modified Sago (Metroxylon sagu) Starch by Gelatinization and Retrogradation Cycling

I Gusti Putu Adi Palguna, Sugiyono Sugiyono, Bambang Hariyanto
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Abstract

Modifikasi pati adalah perlakuan yang diberikan pada pati agar diperoleh sifat yang lebih baik atau mengubah beberapa sifat tertentu. Kajian mengenai karakteristik pati sagu termodifikasi perlu dilakukan agar pati sagu termodifikasi tepat pemanfaatannya sesuai dengan karakteristik produk pangan yang diinginkan. Tujuan penelitian ini adalah mempelajari perubahan karakteristik pati sagu akibat modifikasi dengan perlakuan gelatinisasi dan retrogradasi berulang. Karakteristik yang diamati adalah sifat birefringence, bentuk granula pati, kadar pati resisten, daya cerna pati, nilai sineresis, kekuatan gel, pelepasan amilosa, dan parameter gelatinisasi pati. Proses 3 siklus gelatinisasi dan retrogradasi meningkatkan kadar pati resisten menjadi 7,82 persen. Dengan demikian pati sagu termodifikasi dapat dikaji lebih lanjut potensinya untuk pengembangan produk pangan fungsional berbasis bahan pangan lokal.

Starch modification is a treatment given to the starch in order to obtain better properties or change several specific properties. The study of the characteristics of modified sago starch needs to be conducted so that modified sago can be properly utilized in accordance with the desired characteristics of food products. This research aims to study the changes in characteristics due to modification of sago starch by gelatinization and retrogradation cycling. The evaluated characteristics of gelatinized and retrogradated starch were birefringence properties, shape and size, resistant starch, starch digestibility, syneresis, gel strength, amylose leaching, and starch gelatinization profiles. A three-cycle gelatinization-retrogradation process produces the highest resistant starch content (7.82 percent). Therefore, the potential of modified sago starch can be studied further for the development of functional food products based on local food.

Keywords

gelatinization; retro gradation; resistant starch; sago starch

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