Diffusion of sodium alginate in aqueous solutions at T = 298.15 K |
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| Institution: | 1. Department of Chemistry, University of Coimbra, 3004 – 535 Coimbra, Portugal;2. U.D. Química Física, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain;1. Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia;2. Novosibirsk State University, Novosibirsk, Russia;3. Sobolev Institute of Mathematics SB RAS, Novosibirsk, Russia;4. Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, Hradec Kralove 50003, Czech Republic;5. Gazprom Neft, St. Petersburg 190000, Russia;1. Molecular Signaling Lab, Computational Systems Biology Research Group, BioMediTech and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland;2. Laboratory of Chemistry and Bioengineering, Tampere University of Technology, Korkeakoulunkatu 8, 33101 Tampere, Finland;3. Predictive Medicine and Data Analytics Lab, Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland;4. Centre of Advanced Study in Crystallography & Biophysics, University of Madras, Chennai 600025, India;5. Institute for Systems Biology, 1441N 34th Street, Seattle, WA 98103-8904, USA;1. Eli and Edythe Broad Center for Regenerative Medicine, UCLA, United States;2. The Molecular Biology Institute, UCLA, United States;3. Department of Biochemistry and Molecular Biology, University of Chicago, United States;4. The Jonsson Comprehensive Cancer Center, UCLA, United States;5. Department of Dermatology, David Geffen School of Medicine, UCLA, United States;1. UTP University of Science and Technology, Institute of Mathematics and Physics, Kaliskiego 7, PL-85796 Bydgoszcz, Poland;2. Department of Physics, East Carolina University, Greenville, NC 27858, USA;3. Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland;4. Silesian Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland;5. Technical University of Munich, School of Life Sciences Weihenstephan, Maximus-von-Imhof-Forum 2, 85354 Freising, Germany |
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| Abstract: | Taylor dispersion technique was used for measuring mutual diffusion coefficients of sodium alginate aqueous solutions at T = 298.15 K, by using as carrier stream solution both pure water and solutions of this polyelectrolyte at a slightly different concentration. The limiting values found at infinitesimal ionic strength, D0, were determined by extrapolating to c → 0. These studies were complemented by molecular mechanics calculations. From the experimental data, it was possible to estimate both the limiting conductivity and the tracer diffusion coefficient values for the alginate anion, and the hydrodynamic radius of the sodium alginate (NaC6H7O6), as well as to discuss the influence of the kinetic, thermodynamic and viscosity factors on the diffusion of sodium alginate in aqueous solutions at finite concentrations. Thus, the aim of our innovative research is to contribute to a better understanding of the structure and the thermodynamic behavior of these polymeric systems in solution and supplying the scientific and technological communities with data on these important parameters in solution transport processes. |
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| Keywords: | Mutual diffusion coefficient Sodium alginate Polyelectrolyte solutions Viscosity Density |
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