title: Some physico-chemical properties of Prunus armeniaca L. gum exudates.
abstract: The objectives of this paper were to investigate some physicochemical properties of Prunus armeniaca L. gum exudates (PAGE). PAGE had, on average, 66.89% carbohydrate, 10.47% uronic acids, 6.9% moisture (w.b.), 2.91% protein, 4% ash and 1.59% fat. PAGE was composed of monosaccharides including l-arabinose, d-galactose, xylose, mannose and rhamnose in molar percentages of 41.52%, 23.72%, 17.82%, 14.40% and 2.54%, respectively. Elemental analysis showed that PAGE had high values of nutrients. FTIR analysis demonstrated the presence of carboxyl, hydroxyl and methyl groups and glycoside bonds. The weight average molecular weight, number average molecular weight and polydispersity index were found to be approximately 5.69 × 10(5)g/mol, 4.33 g/mol and 1.31, respectively. Rheological measurement of PAGE solutions as a function of concentration (8, 10 and 12% (w/w)) and temperature (10, 20, 30 and 40°C) demonstrated that the gum solutions had a non Newtonian shear thinning behaviour. Intrinsic viscosity for PAGE in deionized water was 3.438 dl/g based on Kramer equation.
authors.affiliation: Department of Food science and Technology, Ferdowsi University of Mashhad (FUM), PO Box: 91775-1163, Mashhad, Iran.
authors.forename: Morteza
authors.initials: M
authors.lastname: Fathi
authors.affiliation: Department of Food science and Technology, Ferdowsi University of Mashhad (FUM), PO Box: 91775-1163, Mashhad, Iran. Electronic address: m-mohebbi@um.ac.ir.
authors.forename: Mohebbat
authors.initials: M
authors.lastname: Mohebbi
authors.affiliation: Department of Food science and Technology, Ferdowsi University of Mashhad (FUM), PO Box: 91775-1163, Mashhad, Iran.
authors.forename: Arash
authors.initials: A
authors.lastname: Koocheki
mesh_terms: D002241:Carbohydrates / Q000737:chemistry; D055598:Chemical Phenomena; D008401:Gas Chromatography-Mass Spectrometry; D008970:Molecular Weight; D053149:Plant Gums / Q000737:chemistry* / Q000302:isolation & purification; D000068219:Prunus armeniaca / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014783:Viscosity
chemical_list: D002241:Carbohydrates; D053149:Plant Gums
keywords: Physicochemical properties; Prunus armeniaca L.