title: Effects of the order of addition of reagents and alkali on modification of wheat starches.
abstract: The objective of this research was to determine if adding reactive reagents to wheat starch granules before addition of alkali (the TRF method) would produce products that are different than those obtained with the conventional procedure (adding alkali before addition of reagent). Laboratory-isolated (LI) and commercial (C) normal (NWS) and waxy (WWS) wheat starches were each reacted with 6 reagents (acetic-adipic mixed anhydride (AAMA), phosphoryl chloride (POCl3), sodium trimetaphosphate (STMP), acetic anhydride (AA), succinic anhydride (SA), octenylsuccinic anhydride (OSA)). Data obtained were similar to those previously obtained with maize starches (Sui, Huber, & BeMiller, 2013). Almost no starch polymer molecule modification occurred when the TRF method and AAMA or AA were used; less than a third as much reaction when SA was the reagent used, and about the same amount of reaction when POCl3, STMP, or OSA were the reagents used (for different reasons).
authors: Whistler Center for Carbohydrate Research, Department of Food Science, Purdue University, West Lafayette, IN 47907-2009, USA; Institute of Food and Nutraceutical Science, Key Lab of Urban Agriculture (South), School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
authors: Zhongquan
authors: Z
authors: Sui
authors: School of Food Science, University of Idaho, Moscow, ID 83844, USA.
authors: Kerry C
authors: KC
authors: Huber
authors: Whistler Center for Carbohydrate Research, Department of Food Science, Purdue University, West Lafayette, IN 47907-2009, USA. Electronic address: bemiller@purdue.edu.
authors: James N
authors: JN
authors: BeMiller
mesh_terms: D000089:Acetic Anhydrides / Q000737:chemistry; D000468:Alkalies / Q000737:chemistry; D017553:Phosphorus Compounds / Q000737:chemistry; D011122:Polyphosphates / Q000737:chemistry; D013213:Starch / Q000031:analogs & derivatives / Q000737:chemistry*; D013387:Succinic Anhydrides / Q000737:chemistry; D014908:Triticum / Q000737:chemistry*
chemical_list: D000089:Acetic Anhydrides; D000468:Alkalies; D017553:Phosphorus Compounds; D011122:Polyphosphates; D013387:Succinic Anhydrides; C031800:acetic anhydride; C031801:succinic anhydride; D013213:Starch; C013196:phosphoryl chloride; C009293:trimetaphosphoric acid
keywords: Starch granule protein; Starch modification; Starch reactivity; Wheat starch