Volume 23, Issue 2 (2021)                   JAST 2021, 23(2): 333-347 | Back to browse issues page

‎ 20.1001.1.16807073.2021.23.2.10.5

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Farahmand A, Naji Tabasi S, Shahbazizadeh S. Influence of Selected Salts and Sugars on the Rheological Behavior of Quince Seed Mucilage. JAST 2021; 23 (2) :333-347
URL: http://jast.modares.ac.ir/article-23-36719-en.html
Influence of Selected Salts and Sugars on the Rheological Behavior of Quince Seed Mucilage
A. Farahmand1 , S. Naji Tabasi * 2, S. Shahbazizadeh1
1- Department of Food Nanotechnology, Research Institute of Food Science and Technology (RIFST), P. O. Box: 91895-157.356, Mashhad, Islamic Republic of Iran.
2- Department of Food Nanotechnology, Research Institute of Food Science and Technology (RIFST), P. O. Box: 91895-157.356, Mashhad, Islamic Republic of Iran. , sarah_naji@yahoo.com
Abstract:   (1428 Views)
Properties of solvent/cosolute in a food system obviously can influence the rheological properties of hydrocolloids. In this work, the impact of various concentrations of some sugars (sucrose and glucose at 10, 20, and 30% w/w concentration) and salts (CaCl2 and NaCl, 50, 100, and 150 mM) on the rheological properties of Quince Seed Mucilage (QSM) were investigated. QSM produced high viscosity dispersion with yield stress, which was affected by concentrations and types of salt and sugar. The salts altered the electrostatic interactions between the QSM chains and led to the viscosity reduction. Increasing the salt concentration, decreased the yield stress (τ0) and consistency coefficient (k) values, but led to increase in the flow behavior index (n) value. Sucrose and glucose increased the apparent viscosity of QSM dispersions. High sugar concentrations resulted in higher viscosity. Assessment of the time-dependent flow behavior of QSM dispersions proved that the structural kinetic model had the best data description. All the samples showed thixotropic behavior. The Atomic Force Microscope (AFM) results exhibited a proper understanding of the chain interactions of QSM and changes in the flow behavior. The results of this research showed that CaCl2 and sucrose had more pronounced effect on the rheological properties of QSM.
Keywords: Hydrocolloid, Quince mucilage, Rheology, Structural kinetic model.
Full-Text [PDF 998 kb]   (897 Downloads)    
Article Type: Original Research | Subject: Food Engineering
Received: 2019/09/23 | Accepted: 2020/07/11 | Published: 2021/02/17
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