Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions

The diffusional mobility of disodium fluorescein has been measured in supercooled aqueous solutions of trehalose, a widely used cryoprotectant disaccharide. The results were analyzed on the basis of the classical continuum hydrodynamic theory (Stokes - Einstein relationship) and compared with result...

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Autores principales:	Corti, Horacio Roberto, Frank, Guillermo A., Marconi, Mario Carlos
Publicado:	2008
Materias:	Electric conductivity Fluid dynamics Glass transition Hydrodynamics Ionization of liquids Polysaccharides Semiconductor doping Sugar (sucrose) Sugars Supercooling Aqueous solutions Classical models Cryoprotectant Diffusional mobilities Electrical conductivities Glass transition temperatures Hydrodynamic theories Ionic solutes Nonionic solutes Sugar solutions Trehalose solutions Water mobilities Solutions
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v112_n41_p12899_Corti http://hdl.handle.net/20.500.12110/paper_15206106_v112_n41_p12899_Corti
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_15206106_v112_n41_p12899_Corti
record_format	dspace
spelling	paper:paper_15206106_v112_n41_p12899_Corti2023-06-08T16:18:59Z Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions Corti, Horacio Roberto Frank, Guillermo A. Marconi, Mario Carlos Electric conductivity Fluid dynamics Glass transition Hydrodynamics Ionization of liquids Polysaccharides Semiconductor doping Sugar (sucrose) Sugars Supercooling Aqueous solutions Classical models Cryoprotectant Diffusional mobilities Electrical conductivities Glass transition temperatures Hydrodynamic theories Ionic solutes Nonionic solutes Sugar solutions Trehalose solutions Water mobilities Solutions The diffusional mobility of disodium fluorescein has been measured in supercooled aqueous solutions of trehalose, a widely used cryoprotectant disaccharide. The results were analyzed on the basis of the classical continuum hydrodynamic theory (Stokes - Einstein relationship) and compared with results for the diffusion and electrical conductivity of other ionic and nonionic solutes in trehalose and sucrose aqueous solutions. Disodium fluorescein obeys the classical model over a restricted range of inverse reduced temperatures, Tg/T, scaled by the glass transition temperature. Decoupling in neutral solutes takes place at higher values of Tg/T, while in ionic solutes it occurs all over the range of Tg/T studied, as observed for the water mobility in supercooled sugar solutions. © 2008 American Chemical Society. Fil:Corti, H.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Frank, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marconi, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v112_n41_p12899_Corti http://hdl.handle.net/20.500.12110/paper_15206106_v112_n41_p12899_Corti
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Electric conductivity Fluid dynamics Glass transition Hydrodynamics Ionization of liquids Polysaccharides Semiconductor doping Sugar (sucrose) Sugars Supercooling Aqueous solutions Classical models Cryoprotectant Diffusional mobilities Electrical conductivities Glass transition temperatures Hydrodynamic theories Ionic solutes Nonionic solutes Sugar solutions Trehalose solutions Water mobilities Solutions
spellingShingle	Electric conductivity Fluid dynamics Glass transition Hydrodynamics Ionization of liquids Polysaccharides Semiconductor doping Sugar (sucrose) Sugars Supercooling Aqueous solutions Classical models Cryoprotectant Diffusional mobilities Electrical conductivities Glass transition temperatures Hydrodynamic theories Ionic solutes Nonionic solutes Sugar solutions Trehalose solutions Water mobilities Solutions Corti, Horacio Roberto Frank, Guillermo A. Marconi, Mario Carlos Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
topic_facet	Electric conductivity Fluid dynamics Glass transition Hydrodynamics Ionization of liquids Polysaccharides Semiconductor doping Sugar (sucrose) Sugars Supercooling Aqueous solutions Classical models Cryoprotectant Diffusional mobilities Electrical conductivities Glass transition temperatures Hydrodynamic theories Ionic solutes Nonionic solutes Sugar solutions Trehalose solutions Water mobilities Solutions
description	The diffusional mobility of disodium fluorescein has been measured in supercooled aqueous solutions of trehalose, a widely used cryoprotectant disaccharide. The results were analyzed on the basis of the classical continuum hydrodynamic theory (Stokes - Einstein relationship) and compared with results for the diffusion and electrical conductivity of other ionic and nonionic solutes in trehalose and sucrose aqueous solutions. Disodium fluorescein obeys the classical model over a restricted range of inverse reduced temperatures, Tg/T, scaled by the glass transition temperature. Decoupling in neutral solutes takes place at higher values of Tg/T, while in ionic solutes it occurs all over the range of Tg/T studied, as observed for the water mobility in supercooled sugar solutions. © 2008 American Chemical Society.
author	Corti, Horacio Roberto Frank, Guillermo A. Marconi, Mario Carlos
author_facet	Corti, Horacio Roberto Frank, Guillermo A. Marconi, Mario Carlos
author_sort	Corti, Horacio Roberto
title	Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
title_short	Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
title_full	Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
title_fullStr	Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
title_full_unstemmed	Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
title_sort	diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
publishDate	2008
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v112_n41_p12899_Corti http://hdl.handle.net/20.500.12110/paper_15206106_v112_n41_p12899_Corti
work_keys_str_mv	AT cortihoracioroberto diffusionviscositydecouplinginsupercooledaqueoustrehalosesolutions AT frankguillermoa diffusionviscositydecouplinginsupercooledaqueoustrehalosesolutions AT marconimariocarlos diffusionviscositydecouplinginsupercooledaqueoustrehalosesolutions
_version_	1768543962957611008

Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions

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