title: Effect of sugars and salts on rheological properties of Balangu seed (Lallemantia royleana) gum.
abstract: The effect of different sugars (sucrose, glucose, fructose, and lactose) and salts (NaCl and CaCl2) at various concentrations on rheological properties of Balangu seed gum (BSG, 1% w/w) was investigated. The apparent viscosity was influenced by the sugars and salts concentration and shear rate. Synergistic interaction between BSG gum and sugars improved the viscosity of solutions, whereas addition of salts decreased viscosity of gum solutions. The Power law and Herschel-Bulkley models were fitted to shear stress-shear rate data to obtain the consistency coefficient (K) and flow behavior index (n) for BSG solutions. Power law model well described non-Newtonian pseudoplastic behavior of BSG. Both K and n were sensitive to sugars and salts concentration. Highest values (0.45-0.49) of flow behavior index were observed for glucose at all concentrations. Addition of sucrose, fructose, lactose and salts to BSG led to more pseudoplastic solutions, whereas glucose decreased pseudoplasticity of solutions.
authors.affiliation: Faculty of Food Science & Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. Electronic address: FS1446@yahoo.com.
authors.forename: Fakhreddin
authors.initials: F
authors.lastname: Salehi
authors.affiliation: Faculty of Food Science & Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Kashaninejad
authors.affiliation: Faculty of Food Science & Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
authors.forename: Vahid
authors.initials: V
authors.lastname: Behshad
mesh_terms: D002241:Carbohydrates / Q000494:pharmacology*; D053149:Plant Gums / Q000737:chemistry*; D012212:Rheology; D012965:Sodium Chloride / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D014783:Viscosity / Q000187:drug effects*
chemical_list: C556697:Balangu seed gum; D002241:Carbohydrates; D053149:Plant Gums; D012996:Solutions; D012965:Sodium Chloride
keywords: Hydrocolloid; Salt; Sugar