Publication
Experimental and theoretical studies on water activity: aqueous solutions of amino acids with electrolytes
| dc.contributor.author | Fernandes, Isa Cristiana Moreira | |
| dc.contributor.author | Vilarinho, Mário F. | |
| dc.contributor.author | Pinho, Simão | |
| dc.date.accessioned | 2010-11-17T15:58:28Z | |
| dc.date.available | 2010-11-17T15:58:28Z | |
| dc.date.issued | 2008 | |
| dc.description.abstract | In the recent past a considerable body of work has been published on the measurement of activity coefficients and solubility data in aqueous amino acid solutions containing electrolytes [1]. However, no information on water activity in this type of system has yet been published [2]. In this work water activity (aw) in DL-alanine, glycine or L-serine aqueous systems with ammonium sulfate, at 298.15 K, was measured. The LabMASTER-aw water activity instrument (Novasina, Switzerland) was used to perform the measurements. The instrument, with a controlled chamber temperature (± 0.2 K), shows high precision (± 0.001 aw units). The new experimental data was used to test different theoretical schemes such as Zdanovskii-Stokes-Robinson (ZSR) model [3] and its extension, or the Clegg-Seinfeld-Brimblecombe (CSB) approach [4], in the calculation of amino acid and electrolyte activity coefficients in those solutions. Comparisons between the different approaches are given. | por |
| dc.identifier.citation | Fernandes, Isa; Vilarinho, Mário; Pinho, Simão (2008). Experimental and theoretical studies on water activity: aqueous solutions of amino acids with electrolytes. In 23rd European Symposium on Applied Thermodynamics. Cannes | por |
| dc.identifier.uri | http://hdl.handle.net/10198/2831 | |
| dc.language.iso | eng | por |
| dc.subject | Water activity | por |
| dc.subject | Electrolyte | por |
| dc.subject | Amino acids | por |
| dc.subject | Measurement | por |
| dc.title | Experimental and theoretical studies on water activity: aqueous solutions of amino acids with electrolytes | por |
| dc.type | conference object | |
| dspace.entity.type | Publication | |
| oaire.citation.conferencePlace | Cannes, França | por |
| oaire.citation.title | 23rd European Symposium on Applied Thermodynamics | por |
| person.familyName | Pinho | |
| person.givenName | Simão | |
| person.identifier | 810882 | |
| person.identifier.ciencia-id | 481D-73AD-8D0F | |
| person.identifier.orcid | 0000-0002-9211-857X | |
| person.identifier.rid | D-4148-2013 | |
| person.identifier.scopus-author-id | 7003570175 | |
| rcaap.rights | openAccess | por |
| rcaap.type | conferenceObject | por |
| relation.isAuthorOfPublication | 8ef7789a-34f3-4915-a666-4efe26272a30 | |
| relation.isAuthorOfPublication.latestForDiscovery | 8ef7789a-34f3-4915-a666-4efe26272a30 |