KARAKTERISTIK FISIKO-KIMIA DAN POTENSI PREBIOTIK PATI SAGU (Metroxylon rumphii) FOSFAT

• Main Authors: , Febby J. Polnaya, , Prof. Dr. Ir. Haryadi, M.App.Sc.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/122729/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=62833
• Institution: Universitas Gadjah Mada

Native sago starch (NSS) contains chemically bound phosphorus which were < 0.01%, and mainly linked to amylopectin molecules as phosphate groups. The phosphate groups affect the properties of the sago starch on starch functional properties such as resistant to enzyme. To obtain higher phosphorus content, starch might be chemically phosphorylated. Phosphorylated starch might be grouped into two classes: monostarch phosphate (MSP) and distarch phosphate (cross-linked starch) (DSP). MSP can be obtained by esterification of native starch using sodium tripolyphosphate (STPP), while DSP obtained by using phosphorous oxychloride (POCl3). Phosphorylation can increase the substitution of phosphate groups or degree of substitution (DS) and this group can inhibit the migration of the molecules into a combining site with α-amylase and then increase the level resistant starch (RS). RS were of particular interest because of possible potential health benefits for human. RS were recognized as one component of nondigestible carbohydrates in human, where they had been shown to be almost totally fermented in the colon to short-chain fatty acids (SCFA), and to reduce pH. Because of their ability to promote beneficial bacteria, RS were also called "prebiotic" nutrients. Prebiotic could stimulate the increase of bifidobacteria and lactobacilli groups and then suppressed the growing of bacteroides and clostridia groups. It was interesting to apply the sago starch as local food that can be developed as a novel prebiotic. The general purposes of this study were to know the physico-chemical of PSS related to the functional properties of RS and prebiotic potential. The specific objectives of the research are: 1) to know the effect of phosphorylation on the chemical composition