title: Dilute solution properties of canary seed (Phalaris canariensis) starch in comparison to wheat starch.
abstract: Dilute solution properties of an unknown starch are important to understand its performance and applications in food and non-food industries. In this paper, rheological and molecular properties (intrinsic viscosity, molecular weight, shape factor, voluminosity, conformation and coil overlap parameters) of the starches from two hairless canary seed varieties (CO5041 & CDC Maria) developed for food use were evaluated in the dilute regime (Starch dispersions in DMSO (0.5g/dl)) and compared with wheat starch (WS). The results showed that Higiro model is the best among five applied models for intrinsic viscosity determination of canary seed starch (CSS) and WS on the basis of coefficient of determination (R(2)) and root mean square error (RMSE). WS sample showed higher intrinsic viscosity value (1.670dl/g) in comparison to CSS samples (1.325-1.397dl/g). Berry number and the slope of master curve demonstrated that CSS and WS samples were in dilute domain without entanglement occurrence. The shape factor suggested spherical and ellipsoidal structure for CO5041 starch and ellipsoidal for CDC Maria starch and WS. The molecular weight, coil radius and coil volume of CSSs were smaller than WS. The behavior and molecular characterization of canary seed starch showed its unique properties compared with wheat starch.
authors.affiliation: Food Hydrocolloids Research Centre, Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), PO Box 91775-1163, Mashhad, Iran.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Irani
authors.affiliation: Food Hydrocolloids Research Centre, Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), PO Box 91775-1163, Mashhad, Iran. Electronic address: s.razavi@um.ac.ir.
authors.forename: Seyed M A
authors.initials: SM
authors.lastname: Razavi
authors.affiliation: Agriculture and Agri-Food Canada, Guelph Food Research Centre, Guelph, Ontario N1G 5C9, Canada.
authors.forename: El-Sayed M
authors.initials: el-SM
authors.lastname: Abdel-Aal
authors.affiliation: University of Saskatchewan, Crop Development Centre, 51 Campus Dr., Saskatoon, SK S7N 5A8, Canada.
authors.forename: Pierre
authors.initials: P
authors.lastname: Hucl
authors.affiliation: The Pathfinders Research & Management Ltd., 1124 Colony St., Saskatoon, SK R3C 3G7 Canada.
authors.forename: Carol Ann
authors.initials: CA
authors.lastname: Patterson
mesh_terms: D002236:Carbohydrate Conformation; D008970:Molecular Weight; D031783:Phalaris / Q000737:chemistry*; D012212:Rheology; D012639:Seeds / Q000737:chemistry*; D012996:Solutions; D013213:Starch / Q000737:chemistry*; D014908:Triticum / Q000737:chemistry*; D014783:Viscosity
chemical_list: D012996:Solutions; D013213:Starch
keywords: Canary seed; Intrinsic viscosity; Molecular weight; Shape parameter; Starch; Wheat