Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.19/1379
Título: Moisture diffusivity in pears: Experimental determination and derivation of a mathematical prediction model.
Autor: Guiné, Raquel
Palavras-chave: diffusivity
sugar concentration
mathematical model
Data: 2006
Citação: Guiné RPF. (2006) Moisture diffusivity in pears: Experimental determination and derivation of a mathematical prediction model. International Journal of Food Science and Technology, 41, 1177-1181.
Relatório da Série N.º: 41;
Resumo: In the present work the dependence of moisture diffusivity on pear composition (in particular, water and sugar concentrations) was examined from the drying rate data measured experimentally. A model for predicting diffusivity that accounts for the effects of three variables (temperature, moisture content and sugar concentration) was then developed, and compared with the model presented by Zogzas and Maroulis (Drying Technology 1996;14:1543), which accounts only for the influence of temperature and moisture concentration. It was observed that the value for the activation energy predicted by the model that includes the influence of the sugar concentration is higher, showing that the amount of sugar present influences the diffusion of moisture through the pear. From the results obtained it was possible to conclude that at constant temperature the diffusivity is increased for higher water contents and lower sugar concentrations. Furthermore, it was possible to observe that higher temperatures have a much more pronounced influence on the diffusivity, compared with lower temperatures.
Peer review: yes
URI: http://hdl.handle.net/10400.19/1379
Aparece nas colecções:ESAV - DIA - Artigos publicados em revista científica

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
2006_IJSFT_Peras_Difusividade.pdf309,36 kBAdobe PDFVer/Abrir    Acesso Restrito. Solicitar cópia ao autor!


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.