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, Héctor Arturo, Schebor, Carolina C., Buera, María del Pilar
Publicado: 2000
Materias:
Amorphous
Crystallization
Glass transition
Isotherms
Raffinose
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221147_v65_n4_p646_Iglesias
http://hdl.handle.net/20.500.12110/paper_00221147_v65_n4_p646_Iglesias
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_00221147_v65_n4_p646_Iglesias2023-06-08T14:46:18Z Sorption isotherm and calorimetric behavior of amorphous/crystalline raffinose-water systems Iglesias, Héctor Arturo Schebor, Carolina C. Buera, María del Pilar 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. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221147_v65_n4_p646_Iglesias 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, Héctor Arturo
Schebor, Carolina C.
Buera, María del Pilar
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.
author Iglesias, Héctor Arturo
Schebor, Carolina C.
Buera, María del Pilar
author_facet Iglesias, Héctor Arturo
Schebor, Carolina C.
Buera, María del Pilar
author_sort Iglesias, Héctor Arturo
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
publishDate 2000
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221147_v65_n4_p646_Iglesias
http://hdl.handle.net/20.500.12110/paper_00221147_v65_n4_p646_Iglesias
work_keys_str_mv AT iglesiashectorarturo sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems
AT scheborcarolinac sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems
AT bueramariadelpilar sorptionisothermandcalorimetricbehaviorofamorphouscrystallineraffinosewatersystems
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