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Títol:
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Survival analysis model to estimate sensory shelf life with temperature and illumination as accelerating factors
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Autor/a:
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Garitta, Lorena; Langohr, Klaus; Elizagoyen, Eliana; Gugole Ottaviano, Fernanda; Gómez Melis, Guadalupe; Hough, Guillermo
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Altres autors:
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Universitat Politècnica de Catalunya. Departament d'Estadística i Investigació Operativa; Universitat Politècnica de Catalunya. GRBIO - Grup de Recerca en Bioestadística i Bioinformàtica |
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Abstract:
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The main objective of this study was to introduce a survival model to contemplate two simultaneous accelerating factors affecting a food product’s shelf life: temperature and illumination. A second objective was to consider the case where the same consumer tests different experimental conditions and thus his/her data are not independent. Sample data comprised 108 consumers who evaluated a lemon-flavored juice stored at 24¿°C, 37¿°C and 45¿°C; under conditions of no-illumination and with illumination; with seven different storage times for each of the six experimental conditions. Aiming to estimate the storage time at which a consumer rejects a sample a model including an Arrhenius term for the temperature, a binomial response for illumination (with and without) and the interaction of both was developed. The model also considered that the same consumer tested different experimental conditions. |
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Abstract:
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Peer Reviewed |
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Matèries:
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-Àrees temàtiques de la UPC::Matemàtiques i estadística::Investigació operativa
-System theory
-Sensory
-Survival analysis
-Shelf life
-Accelerated studies
-Temperature
-Illumination
-Sistemes de control
-Classificació AMS::93 Systems Theory; Control::93B Controllability, observability, and system structure |
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Drets:
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Tipus de document:
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Article - Versió presentada
Article |
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