The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation

A refinement of the Guggenheim-Anderson-de Boer (GAB) sorption model which allows for the existence of a third sorption stage, was used to analyze the behavior of adsorption isotherms of starches at very high water activity (aw). The results of experimental isotherm analysis with the new model revea...

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Detalles Bibliográficos
Autor principal: Timmermann, Ernesto O.
Publicado: 1991
Materias:
Mathematical Models
Moisture Determination
Thermoanalysis
Water - Sorption
Adsorbed Water Physical State
Starch Adsorption Isotherms
Water High Activity
Water Molecules
Starch
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v13_n3_p171_Timmermann
http://hdl.handle.net/20.500.12110/paper_02608774_v13_n3_p171_Timmermann
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_02608774_v13_n3_p171_Timmermann
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spelling paper:paper_02608774_v13_n3_p171_Timmermann2023-06-08T15:22:20Z The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation Timmermann, Ernesto O. Mathematical Models Moisture Determination Thermoanalysis Water - Sorption Adsorbed Water Physical State Starch Adsorption Isotherms Water High Activity Water Molecules Starch A refinement of the Guggenheim-Anderson-de Boer (GAB) sorption model which allows for the existence of a third sorption stage, was used to analyze the behavior of adsorption isotherms of starches at very high water activity (aw). The results of experimental isotherm analysis with the new model revealed that above about aw=0·90 a change in the physical state of adsorbed water in starch occurred; i.e. the water molecules would be more 'liquid-like' than in the preceding layers. This transition corresponds with the unfreezable water content in starch, as determined by others. © 1991. Fil:Timmermann, E.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1991 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v13_n3_p171_Timmermann http://hdl.handle.net/20.500.12110/paper_02608774_v13_n3_p171_Timmermann
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Mathematical Models
Moisture Determination
Thermoanalysis
Water - Sorption
Adsorbed Water Physical State
Starch Adsorption Isotherms
Water High Activity
Water Molecules
Starch
spellingShingle Mathematical Models
Moisture Determination
Thermoanalysis
Water - Sorption
Adsorbed Water Physical State
Starch Adsorption Isotherms
Water High Activity
Water Molecules
Starch
Timmermann, Ernesto O.
The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation
topic_facet Mathematical Models
Moisture Determination
Thermoanalysis
Water - Sorption
Adsorbed Water Physical State
Starch Adsorption Isotherms
Water High Activity
Water Molecules
Starch
description A refinement of the Guggenheim-Anderson-de Boer (GAB) sorption model which allows for the existence of a third sorption stage, was used to analyze the behavior of adsorption isotherms of starches at very high water activity (aw). The results of experimental isotherm analysis with the new model revealed that above about aw=0·90 a change in the physical state of adsorbed water in starch occurred; i.e. the water molecules would be more 'liquid-like' than in the preceding layers. This transition corresponds with the unfreezable water content in starch, as determined by others. © 1991.
author Timmermann, Ernesto O.
author_facet Timmermann, Ernesto O.
author_sort Timmermann, Ernesto O.
title The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation
title_short The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation
title_full The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation
title_fullStr The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation
title_full_unstemmed The physical state of water sorbed at high activities in starch in terms of the GAB sorption equation
title_sort physical state of water sorbed at high activities in starch in terms of the gab sorption equation
publishDate 1991
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v13_n3_p171_Timmermann
http://hdl.handle.net/20.500.12110/paper_02608774_v13_n3_p171_Timmermann
work_keys_str_mv AT timmermannernestoo thephysicalstateofwatersorbedathighactivitiesinstarchintermsofthegabsorptionequation
AT timmermannernestoo physicalstateofwatersorbedathighactivitiesinstarchintermsofthegabsorptionequation
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