title: Effect of preparation method on the properties of potato starch acetates with an equal degree of substitution.
abstract: Acetylated retrograded starch is one of the forms of resistant starch (RS3/4). Apart from the known resistance to amylolysis, it is characterized by the capability to form viscous pastes. Properties of this type of acetates are mainly determined by the degree of substitution and raw material used for esterification. The objective of this study was to produce starch acetates with a degree of substitution DS=0.1 from native potato starch and retrograded potato starch, and to compare selected properties of the resultant preparations. Retrograded starch was produced by freezing pastes with concentrations of 1, 4, 10, 18 or 30 g/100 g. Starch acetates with a degree of substitution DS∼0.1 were produced from native or retrograded starch through acetylation with various doses of acetic acid anhydride (6.5-26.0 cm(3)/100 g of starch). The preparations produced were characterized by various properties. A positive correlation was observed between resistance to amylolysis and the number of acetyl groups at C2 and C3 the produced starch acetates.
authors.affiliation: Department of Food Storage and Technology, Wrocław University of Environmental and Life Science, Chełmońskiego 37/41, 51-630 Wrocław, Poland.
authors.forename: T
authors.initials: T
authors.lastname: Zięba
authors.forename: M
authors.initials: M
authors.lastname: Kapelko
authors.forename: A
authors.initials: A
authors.lastname: Szumny
mesh_terms: D000107:Acetylation; D000688:Amylose / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D005087:Glucan 1,4-alpha-Glucosidase / Q000737:chemistry; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D044367:Phase Transition; D033081:Shear Strength; D011198:Solanum tuberosum / Q000737:chemistry*; D013213:Starch / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D014783:Viscosity
chemical_list: D013213:Starch; D000688:Amylose; C050766:starch acetate; D005087:Glucan 1,4-alpha-Glucosidase