Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes

Detalhes bibliográficos
Autor(a) principal: Barbosa,Karine F.
Data de Publicação: 2016
Outros Autores: Sales,Juliana de F., Resende,Osvaldo, Oliveira,Daniel E. C. de, Zuchi,Jacson, Sousa,Kelly A. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500481
Resumo: ABSTRACT The objective of this study was to determine the desorption isotherms of 'cajuzinho-do-cerrado' achenes (Anacardium humile St. Hil.) in various conditions of temperature and water activity, as well as to select the one that best represents the phenomenon and to determine the isosteric heat of desorption. The fruits were collected at the Emas National Park, in the municipality of Mineiros-GO, Brazil, pulped and then subjected to drying in silica gel at temperature of 25 ± 2 °C until the moisture contents of 17.6, 13.6, 11.1, 8.7 and 5.3 (d.b.%). After drying, the desorption isotherms were determined by the indirect static method. The water activity (Aw) was determined at different temperatures, and the achenes were placed in a B.O.D. chamber, regulated at 10, 20, 30 and 40 °C. Data of hygroscopic equilibrium moisture content were fitted to different mathematical models through non-linear regression analysis, using the Gauss-Newton method. The Copace model was the one that best represented the hygroscopicity of 'cajuzinho-do-cerrado' achenes, while the integral isosteric heat of desorption of 'cajuzinho-do-cerrado' achenes for the moisture content range of 4.51 to 13.40 (% d.b.) varied from 2,734.82 to 2,548.49 kJ kg-1.
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spelling Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenesAnacardium humile St. Hil.hygroscopicitywater activity.ABSTRACT The objective of this study was to determine the desorption isotherms of 'cajuzinho-do-cerrado' achenes (Anacardium humile St. Hil.) in various conditions of temperature and water activity, as well as to select the one that best represents the phenomenon and to determine the isosteric heat of desorption. The fruits were collected at the Emas National Park, in the municipality of Mineiros-GO, Brazil, pulped and then subjected to drying in silica gel at temperature of 25 ± 2 °C until the moisture contents of 17.6, 13.6, 11.1, 8.7 and 5.3 (d.b.%). After drying, the desorption isotherms were determined by the indirect static method. The water activity (Aw) was determined at different temperatures, and the achenes were placed in a B.O.D. chamber, regulated at 10, 20, 30 and 40 °C. Data of hygroscopic equilibrium moisture content were fitted to different mathematical models through non-linear regression analysis, using the Gauss-Newton method. The Copace model was the one that best represented the hygroscopicity of 'cajuzinho-do-cerrado' achenes, while the integral isosteric heat of desorption of 'cajuzinho-do-cerrado' achenes for the moisture content range of 4.51 to 13.40 (% d.b.) varied from 2,734.82 to 2,548.49 kJ kg-1.Departamento de Engenharia Agrícola - UFCG2016-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500481Revista Brasileira de Engenharia Agrícola e Ambiental v.20 n.5 2016reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/1807-1929/agriambi.v20n5p481-486info:eu-repo/semantics/openAccessBarbosa,Karine F.Sales,Juliana de F.Resende,OsvaldoOliveira,Daniel E. C. deZuchi,JacsonSousa,Kelly A. deeng2016-05-02T00:00:00Zoai:scielo:S1415-43662016000500481Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2016-05-02T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
title Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
spellingShingle Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
Barbosa,Karine F.
Anacardium humile St. Hil.
hygroscopicity
water activity.
title_short Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
title_full Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
title_fullStr Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
title_full_unstemmed Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
title_sort Desorption isotherms and isosteric heat of 'cajuzinho-do-cerrado' achenes
author Barbosa,Karine F.
author_facet Barbosa,Karine F.
Sales,Juliana de F.
Resende,Osvaldo
Oliveira,Daniel E. C. de
Zuchi,Jacson
Sousa,Kelly A. de
author_role author
author2 Sales,Juliana de F.
Resende,Osvaldo
Oliveira,Daniel E. C. de
Zuchi,Jacson
Sousa,Kelly A. de
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Barbosa,Karine F.
Sales,Juliana de F.
Resende,Osvaldo
Oliveira,Daniel E. C. de
Zuchi,Jacson
Sousa,Kelly A. de
dc.subject.por.fl_str_mv Anacardium humile St. Hil.
hygroscopicity
water activity.
topic Anacardium humile St. Hil.
hygroscopicity
water activity.
description ABSTRACT The objective of this study was to determine the desorption isotherms of 'cajuzinho-do-cerrado' achenes (Anacardium humile St. Hil.) in various conditions of temperature and water activity, as well as to select the one that best represents the phenomenon and to determine the isosteric heat of desorption. The fruits were collected at the Emas National Park, in the municipality of Mineiros-GO, Brazil, pulped and then subjected to drying in silica gel at temperature of 25 ± 2 °C until the moisture contents of 17.6, 13.6, 11.1, 8.7 and 5.3 (d.b.%). After drying, the desorption isotherms were determined by the indirect static method. The water activity (Aw) was determined at different temperatures, and the achenes were placed in a B.O.D. chamber, regulated at 10, 20, 30 and 40 °C. Data of hygroscopic equilibrium moisture content were fitted to different mathematical models through non-linear regression analysis, using the Gauss-Newton method. The Copace model was the one that best represented the hygroscopicity of 'cajuzinho-do-cerrado' achenes, while the integral isosteric heat of desorption of 'cajuzinho-do-cerrado' achenes for the moisture content range of 4.51 to 13.40 (% d.b.) varied from 2,734.82 to 2,548.49 kJ kg-1.
publishDate 2016
dc.date.none.fl_str_mv 2016-05-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500481
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1807-1929/agriambi.v20n5p481-486
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.20 n.5 2016
reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
instname:Universidade Federal de Campina Grande (UFCG)
instacron:UFCG
instname_str Universidade Federal de Campina Grande (UFCG)
instacron_str UFCG
institution UFCG
reponame_str Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
collection Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
repository.name.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)
repository.mail.fl_str_mv ||agriambi@agriambi.com.br
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