title: Evaluation of nondigested carbohydrates in hydroxypropylated tapioca starch.
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.
authors.affiliation: Matsutani Chemical Industry Co. Ltd., Research Laboratory, Kitaitami, Itami, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tachibe
authors.forename: R
authors.initials: R
authors.lastname: Kato
authors.forename: T
authors.initials: T
authors.lastname: Nishibata
authors.forename: K
authors.initials: K
authors.lastname: Tashiro
authors.forename: T
authors.initials: T
authors.lastname: Kishida
authors.forename: K
authors.initials: K
authors.lastname: Ebihara
mesh_terms: D000714:Anastomosis, Surgical; D000821:Animal Feed; D000818:Animals; D002241:Carbohydrates / Q000032:analysis* / Q000592:standards; D002364:Caseins / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D003553:Cystine / Q000378:metabolism; D004063:Digestion / Q000502:physiology*; D007082:Ileum / Q000502:physiology / Q000601:surgery; D008297:Male; D002365:Manihot / Q000378:metabolism* / Q000592:standards; D051381:Rats; D017208:Rats, Wistar; D012007:Rectum / Q000502:physiology / Q000601:surgery; D013213:Starch / Q000378:metabolism* / Q000592:standards; D013395:Sucrose / Q000378:metabolism
chemical_list: D002241:Carbohydrates; D002364:Caseins; D003553:Cystine; D013395:Sucrose; D013213:Starch