title: Determination of hydrophobicity of dry-heated wheat starch granules using sucrose fatty acid esters (SFAE).
abstract: Sucrose fatty acid esters (SFAE) were adsorbed onto dry-heated (120 °C for 10, 20, 40, 60, and 120 min) wheat starch granules and extracted with ethyl ether in a Soxhlet apparatus without gelatinization of the starch granules. The amount of sucrose in the extracted SFAE was determined by the phenol sulfate method. A gradual increase of the sucrose from 159 to 712 μg, in SFAE per gram of starch, occurred with increasing dry-heating time and demonstrated the increased hydrophobicity of the starch granules. Increase of the SFAE was highly correlated (r = 0.9816) to increase of the oil-binding capacity of the dry-heated wheat starch granules. Non-waxy rice, waxy rice, sweet potato, and potato starch granules also showed higher hydrophobicity after dry-heating by this method.
authors.affiliation: a Faculty of Home Economics, Laboratory of Food Technology , Kobe Women's University , Kobe , Japan.
authors.forename: Aya
authors.initials: A
authors.lastname: Tabara
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Oneda
authors.forename: Ryuji
authors.initials: R
authors.lastname: Murayama
authors.forename: Yuko
authors.initials: Y
authors.lastname: Matsui
authors.forename: Akira
authors.initials: A
authors.lastname: Hirano
authors.forename: Masaharu
authors.initials: M
authors.lastname: Seguchi
mesh_terms: D004952:Esters / Q000737:chemistry; D005227:Fatty Acids / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D013213:Starch / Q000737:chemistry*; D013395:Sucrose / Q000737:chemistry; D014908:Triticum / Q000737:chemistry*; D014885:Waxes / Q000737:chemistry
chemical_list: D004952:Esters; D005227:Fatty Acids; D014885:Waxes; D013395:Sucrose; D013213:Starch
keywords: SFAE; dry-heated starch granule; hydrophobicity; oil-binding capacity