Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2847
Título: A modified gompertz model to predict microbial inactivation under time-varying temperature conditions
Autor: Gil, Maria M.
Brandão, Teresa R.S.
Silva, Cristina L.M.
Palavras-chave: Predictive microbiology
Gompertz model
Inactivation kinetics
Time-varying temperature
Data: 2006
Editora: Elsevier
Citação: GIL, Maria M. ; BRANDÃO, Teresa R.S. ; SILVA, Cristina L.M. - A modified gompertz model to predict microbial inactivation under time-varying temperature conditions. Journal of Food Engineering. ISSN 0260-8774. Vol. 76, nº. 1 (2006), p. 89–94
Resumo: Development of effective heat treatments is crucial to achieve food products safety, and predictive microbiology is an excellent tool to design adequate processing conditions. This work focuses on the application of a modified Gompertz model to describe the inactivation behaviour under time-varying temperature conditions at the surface of a food product. Kinetic studies were carried out assuming two different heating regimes, typically used in surface pasteurisation treatments, and compared with isothermal conditions. Parameters were estimated on the basis of generated pseudo-experimental data. It was concluded that the heating period greatly affects microbial inactivation and parameter estimation. If a slow heating treatment is used, the process time should be extended to achieve a given microbial load when compared to a fast heating process. This is explained by the fact that, in the slow heating rate process the temperature was below the lowest temperature for inactivation for a much longer time, in comparison with the fast heating regime. 2005 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/10400.14/2847
Versão do Editor: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T8J-4GHSG9P-5&_user=2460358&_coverDate=09%2F30%2F2006&_rdoc=13&_fmt=high&_orig=browse&_origin=browse&_zone=rslt_list_item&_srch=doc-info%28%23toc%235088%232006%23999239998%23619319%23FLA%23display%23Volume%29&_cdi=5088&_sort=d&_docanchor=&_ct=15&_acct=C000057417&_version=1&_urlVersion=0&_userid=2460358&md5=3f40d1c8cf2f959620434055ff428f9a&searchtype=a
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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