Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/6646
Título: Development of a non-isothermal method for determination of diffusional parameters
Autor: Moreira, Lília A.
Oliveira, Fernanda A. R.
Silva, Teresa R.
Oliveira, Jorge C.
Palavras-chave: Acidification
Diffusion coefficient,
Fick's 2nd law
Turnip (Brassica Rapa)
Data: 1993
Editora: Wiley-Blackwell
Citação: MOREIRA, Lília A. [et al.] - Development of a non-isothermal method for determination of diffusional parameters. International Journal of Food Science and Technology. ISSN 0950-5423. 28:6 (1993). 575–586
Resumo: A non-isothermal method for determination of diffusional parameters was developed. The dependence of diffusivity on temperature was described by an Arrhenius type equation, 'with the pre-exponential factor and the,activation energy as parameters. These parameters were obtained by optimization of the fit between experimental and theoretical values, using the Simplex method of minimization. Equilibrium conditions were described with a constant unit partition coefficient. This model was applied to the diffusion of acetic acid into turnips. Results compared well with values obtained with the conventional method, using a set of experiments at isothermal conditions. The non-isothermal method has significant advantages, nameiy the need for much less experimental data and better insight into the statistical significance of the results.
Peer review: yes
URI: http://hdl.handle.net/10400.14/6646
Versão do Editor: [The definitive version is available at www3.interscience.wiley.com
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Development of a non-isothermal....pdf4,2 MBAdobe PDFVer/Abrir

FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote 

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