Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR

Crystallization kinetics of concentrated trehalose and trehalose/salt solutions were followed by proton (1H) pulsed nuclear magnetic resonance (1H p-NMR). Three concentrations (66, 70, and 72.5%) of trehalose and with the addition of ZnCl2.2H2O, CaCl2.2H2O, and MgCl2.2H2O were crystallized at 5, 10,...

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Autores principales: Gallo, A., Buera, M.P., Herrera, M.L.
Formato: JOUR
Materias:
Avrami analysis
Crystal morphology
Crystallization kinetics
NMR
Trehalose
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00221147_v67_n4_p1331_Gallo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00221147_v67_n4_p1331_Gallo
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spelling todo:paper_00221147_v67_n4_p1331_Gallo2023-10-03T14:27:09Z Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR Gallo, A. Buera, M.P. Herrera, M.L. Avrami analysis Crystal morphology Crystallization kinetics NMR Trehalose Crystallization kinetics of concentrated trehalose and trehalose/salt solutions were followed by proton (1H) pulsed nuclear magnetic resonance (1H p-NMR). Three concentrations (66, 70, and 72.5%) of trehalose and with the addition of ZnCl2.2H2O, CaCl2.2H2O, and MgCl2.2H2O were crystallized at 5, 10, 15, 20, and 25°C. Supercooling and molecular diffusion determined the crystallization rates. The highest rate of crystallization of 66, 70, and 72.5% trehalose occurred at 20°C, whereas the lowest rate occurred at 25°C. The maximum solid content was higher at lower temperatures, as expected based on the higher supercooling values. Crystallization was delayed by the addition of salts and especially of CaCl2.2H2O. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00221147_v67_n4_p1331_Gallo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Avrami analysis
Crystal morphology
Crystallization kinetics
NMR
Trehalose
spellingShingle Avrami analysis
Crystal morphology
Crystallization kinetics
NMR
Trehalose
Gallo, A.
Buera, M.P.
Herrera, M.L.
Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR
topic_facet Avrami analysis
Crystal morphology
Crystallization kinetics
NMR
Trehalose
description Crystallization kinetics of concentrated trehalose and trehalose/salt solutions were followed by proton (1H) pulsed nuclear magnetic resonance (1H p-NMR). Three concentrations (66, 70, and 72.5%) of trehalose and with the addition of ZnCl2.2H2O, CaCl2.2H2O, and MgCl2.2H2O were crystallized at 5, 10, 15, 20, and 25°C. Supercooling and molecular diffusion determined the crystallization rates. The highest rate of crystallization of 66, 70, and 72.5% trehalose occurred at 20°C, whereas the lowest rate occurred at 25°C. The maximum solid content was higher at lower temperatures, as expected based on the higher supercooling values. Crystallization was delayed by the addition of salts and especially of CaCl2.2H2O.
format JOUR
author Gallo, A.
Buera, M.P.
Herrera, M.L.
author_facet Gallo, A.
Buera, M.P.
Herrera, M.L.
author_sort Gallo, A.
title Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR
title_short Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR
title_full Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR
title_fullStr Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR
title_full_unstemmed Crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1H-pulsed NMR
title_sort crystallization kinetics of concentrated α,α-trehalose and α,α-trehalose/salt solutions studied by low-resolution 1h-pulsed nmr
url http://hdl.handle.net/20.500.12110/paper_00221147_v67_n4_p1331_Gallo
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AT bueramp crystallizationkineticsofconcentratedaatrehaloseandaatrehalosesaltsolutionsstudiedbylowresolution1hpulsednmr
AT herreraml crystallizationkineticsofconcentratedaatrehaloseandaatrehalosesaltsolutionsstudiedbylowresolution1hpulsednmr
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