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Physicochemical and morphological properties of resistant starch type 4 prepared under ultrasound and conventional conditions and their in-vitro and in-vivo digestibilities

Falsafi, S.R. and Maghsoudlou, Y. and Aalami, M. and Jafari, S.M. and Raeisi, M. (2019) Physicochemical and morphological properties of resistant starch type 4 prepared under ultrasound and conventional conditions and their in-vitro and in-vivo digestibilities. Ultrasonics Sonochemistry.

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Abstract

In the present work, cross-linked resistant starch (RS4) was prepared under sonication and conventional conditions at various levels of pH (9�12) and cross-linker concentration (sodium trimetaphosphate/sodium tripolyphosphate 99:1, 5�15). It was found that phosphorous and resistant starch content was generally increased by increasing the cross-linker concentration, pH and application of sonication. The damage to the surface of sonicated granules was revealed by scanning electron micrographs. The presence of cross-linked phosphorous groups was demonstrated by FT-IR results through the appearance of a new peak at wave numbers of 1248�1252 cm�1 that was more conspicuous in sonicated cross-linked samples. Sonicated cross-linked starches showed higher gelatinization temperatures and lower degrees of crystallinity, while no changes was detected in terms of A-type crystalline pattern. The development of viscosity was diminished prominently by the extreme cross-linking reactions in both sonicated and conventional cross-linked starches. The least glycemic index value was obtained for sonicated cross-linked starches which was negatively correlated to their higher RS content measured in-vitro. These results provide novel information on the preparation of cross-linked resistant starch under sonication conditions. © 2018

Item Type: Article
Additional Information: cited By 1; Article in Press
Uncontrolled Keywords: Gelation; Phosphorus; Scanning electron microscopy; Sodium compounds; Sonication; Starch; Ultrasonics, Degrees of crystallinity; Gelatinization temperature; Glucose response; In-vitro; Morphological properties; Resistant starch; Scanning electron micrographs; Sodium trimetaphosphates, Crosslinking
Subjects: QTفیزیولوژی
QU بیوشیمی
مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
موارد کلی
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 14 Apr 2019 06:31
Last Modified: 14 Apr 2019 06:31
URI: http://eprints.goums.ac.ir/id/eprint/9930

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