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Evaluation of Nondigested Carbohydrates in Hydroxypropylated Tapioca Starch

Authors

  • M. Tachibe,

    1. Authors Kato, Kishida, and Ebihara are with Dept. of Biological Resources, Faculty of Agriculture, Ehime Univ., Matsuyama 790-8566, Japan. Authors Tachibe, Nishihata, and Tashiro are with Matsutani Chemical Industry Co. Ltd., Research Laboratory, 5-3 Kitaitami, Itami, 664-8508, Japan. Direct inquiries to author Ebihara (E-mail: ebihara@agr.ehime-u.ac.jp).
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  • R. Kato,

    1. Authors Kato, Kishida, and Ebihara are with Dept. of Biological Resources, Faculty of Agriculture, Ehime Univ., Matsuyama 790-8566, Japan. Authors Tachibe, Nishihata, and Tashiro are with Matsutani Chemical Industry Co. Ltd., Research Laboratory, 5-3 Kitaitami, Itami, 664-8508, Japan. Direct inquiries to author Ebihara (E-mail: ebihara@agr.ehime-u.ac.jp).
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  • T. Nishibata,

    1. Authors Kato, Kishida, and Ebihara are with Dept. of Biological Resources, Faculty of Agriculture, Ehime Univ., Matsuyama 790-8566, Japan. Authors Tachibe, Nishihata, and Tashiro are with Matsutani Chemical Industry Co. Ltd., Research Laboratory, 5-3 Kitaitami, Itami, 664-8508, Japan. Direct inquiries to author Ebihara (E-mail: ebihara@agr.ehime-u.ac.jp).
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  • K. Tashiro,

    1. Authors Kato, Kishida, and Ebihara are with Dept. of Biological Resources, Faculty of Agriculture, Ehime Univ., Matsuyama 790-8566, Japan. Authors Tachibe, Nishihata, and Tashiro are with Matsutani Chemical Industry Co. Ltd., Research Laboratory, 5-3 Kitaitami, Itami, 664-8508, Japan. Direct inquiries to author Ebihara (E-mail: ebihara@agr.ehime-u.ac.jp).
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  • T. Kishida,

    1. Authors Kato, Kishida, and Ebihara are with Dept. of Biological Resources, Faculty of Agriculture, Ehime Univ., Matsuyama 790-8566, Japan. Authors Tachibe, Nishihata, and Tashiro are with Matsutani Chemical Industry Co. Ltd., Research Laboratory, 5-3 Kitaitami, Itami, 664-8508, Japan. Direct inquiries to author Ebihara (E-mail: ebihara@agr.ehime-u.ac.jp).
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  • K. Ebihara

    1. Authors Kato, Kishida, and Ebihara are with Dept. of Biological Resources, Faculty of Agriculture, Ehime Univ., Matsuyama 790-8566, Japan. Authors Tachibe, Nishihata, and Tashiro are with Matsutani Chemical Industry Co. Ltd., Research Laboratory, 5-3 Kitaitami, Itami, 664-8508, Japan. Direct inquiries to author Ebihara (E-mail: ebihara@agr.ehime-u.ac.jp).
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Abstract

ABSTRACT: In vitro and in vivo digestibilities of hydroxypropyl starch were investigated to determine an appropriate nondigested carbohydrate assaying method for hydroxypropyl starch. Hydroxypropyl tapioca starch (HPTS), with a 0.338 degree of substitution, was used as a hydroxypropyl starch source. Practically all nondigested carbohydrate in HPTS was low molecular weight and was not precipitated in 78% ethanol. The contents of nondigested carbohydrate in HPTS and in effluents of ileorectomized rats fed the HPTS diet obtained by the AOAC 2001.03 (enzyme-gravimetric-HPLC method) were almost the same, 56% and 59%, respectively. The recovery of hydroxypropyl groups from ileorectomy effluents was 98%. The AOAC 2001.03 method is suggested to be appropriate in determining the content of nondigested carbohydrates in hydroxypropyl starch.

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