Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems

The water adsorption and desorption isotherms at 27 °C of initially amorphous raffinose over a range of relative humidity of 11% to 97% have been determined. Upon adsorption, the isotherm exhibited a 'quasi' plateau, and the moisture content at this plateau was found to be very close to th...

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Autores principales:	Iglesias, H.A., Schebor, C., Buera, M.P., Chirife, J.
Formato:	JOUR
Materias:	Amorphous Crystallization Glass transition Isotherms Raffinose
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00221147_v65_n4_p646_Iglesias
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00221147_v65_n4_p646_Iglesias
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spelling	todo:paper_00221147_v65_n4_p646_Iglesias2023-10-03T14:27:08Z Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems Iglesias, H.A. Schebor, C. Buera, M.P. Chirife, J. Amorphous Crystallization Glass transition Isotherms Raffinose The water adsorption and desorption isotherms at 27 °C of initially amorphous raffinose over a range of relative humidity of 11% to 97% have been determined. Upon adsorption, the isotherm exhibited a 'quasi' plateau, and the moisture content at this plateau was found to be very close to the amount required to form the crystalline raffinose pentahydrate (R.5 H2O). Crystallization of raffinose (R.5 H2O) during water adsorption at 52% and 58% RH was indicated by differential scanning calorimetry (DSC); both thermograms showed an endothermal peak of melting corresponding to R.5H2O. The results of the crystallization kinetics at 52% and 58% RH indicated that the tame to assess the stable physical state in a sugar system for a given external condition has to be properly defined and depends on the (T-T(g)) value. Fil:Iglesias, H.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Schebor, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Buera, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00221147_v65_n4_p646_Iglesias
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Amorphous Crystallization Glass transition Isotherms Raffinose
spellingShingle	Amorphous Crystallization Glass transition Isotherms Raffinose Iglesias, H.A. Schebor, C. Buera, M.P. Chirife, J. Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
topic_facet	Amorphous Crystallization Glass transition Isotherms Raffinose
description	The water adsorption and desorption isotherms at 27 °C of initially amorphous raffinose over a range of relative humidity of 11% to 97% have been determined. Upon adsorption, the isotherm exhibited a 'quasi' plateau, and the moisture content at this plateau was found to be very close to the amount required to form the crystalline raffinose pentahydrate (R.5 H2O). Crystallization of raffinose (R.5 H2O) during water adsorption at 52% and 58% RH was indicated by differential scanning calorimetry (DSC); both thermograms showed an endothermal peak of melting corresponding to R.5H2O. The results of the crystallization kinetics at 52% and 58% RH indicated that the tame to assess the stable physical state in a sugar system for a given external condition has to be properly defined and depends on the (T-T(g)) value.
format	JOUR
author	Iglesias, H.A. Schebor, C. Buera, M.P. Chirife, J.
author_facet	Iglesias, H.A. Schebor, C. Buera, M.P. Chirife, J.
author_sort	Iglesias, H.A.
title	Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
title_short	Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
title_full	Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
title_fullStr	Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
title_full_unstemmed	Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
title_sort	sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems
url	http://hdl.handle.net/20.500.12110/paper_00221147_v65_n4_p646_Iglesias
work_keys_str_mv	AT iglesiasha sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems AT scheborc sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems AT bueramp sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems AT chirifej sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems
_version_	1807316060855074816

Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems

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