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Abstract:

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.

Registro:

Documento: Artículo
Título:Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions
Autor:Corti, H.R.; Frank, G.A.; Marconi, M.C.
Filiación:Departamento Física de Materia Condensada, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Av. General Paz 1499, 1650 San Martín, Argentina
Institute de Química Física de Materiales, Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Buenos Aires, Argentina
Laboratorio de Electrónica Cuántica, Departamento de Física, Ciudad Universitaria, Pabellón I, Buenos Aires, Argentina
NSF ERC for Extreme Ultraviolet Science and Technology, Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80525, United States
Palabras clave: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
Año:2008
Volumen:112
Número:41
Página de inicio:12899
Página de fin:12906
DOI: http://dx.doi.org/10.1021/jp802806p
Título revista:Journal of Physical Chemistry B
Título revista abreviado:J Phys Chem B
ISSN:15206106
CODEN:JPCBF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15206106_v112_n41_p12899_Corti

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Citas:

---------- APA ----------
Corti, H.R., Frank, G.A. & Marconi, M.C. (2008) . Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions. Journal of Physical Chemistry B, 112(41), 12899-12906.
http://dx.doi.org/10.1021/jp802806p
---------- CHICAGO ----------
Corti, H.R., Frank, G.A., Marconi, M.C. "Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions" . Journal of Physical Chemistry B 112, no. 41 (2008) : 12899-12906.
http://dx.doi.org/10.1021/jp802806p
---------- MLA ----------
Corti, H.R., Frank, G.A., Marconi, M.C. "Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions" . Journal of Physical Chemistry B, vol. 112, no. 41, 2008, pp. 12899-12906.
http://dx.doi.org/10.1021/jp802806p
---------- VANCOUVER ----------
Corti, H.R., Frank, G.A., Marconi, M.C. Diffusion-viscosity decoupling in supercooled aqueous trehalose solutions. J Phys Chem B. 2008;112(41):12899-12906.
http://dx.doi.org/10.1021/jp802806p