Modeling of broiler chicken supply-chain economics depends on robust biological models of growth and yield of broiler chickens. In this paper, 8 dynamic nonlinear broiler carcass and carcass part yield models were evaluated statistically for their suitability for predicting weights of carcass parts. The analysis employed 4 sigmoidal (S) models (Gompertz, modified Gompertz, Richards, and Lopez) ...

The tambaqui, Colossoma macropomum, is one of the most commercially valuable Amazonian fish species, and in the floodplains of the region, they are caught in both rivers and lakes. Most growth studies on this species to date have adjusted only one growth model, the von Bertalanffy, without considering its possible uncertainties. In this study, four different models (von Bertalanffy, Logistic, G...

0260-8774/$ see front matter Published by Elsevier doi:10.1016/j.jfoodeng.2008.07.011 E-mail address: [email protected] The objective of this research was to compare the suitability of three kinetic models for describing the survival of a cocktail of Listeria monocytogenes in ground beef under both isothermal and dynamic temperature conditions. Ground beef (93% lean), inoculated with a 4...

In this study, new unit quantile regression model, called the Unit Gamma/ Gompertz for bounded responses is developed by re-parameterizing Gamma/Gompertz distribution. To estimate parameters of maximum likelihood approach used to develop estimators parameters. Monte Carlo simulations are test consistency model. The application model illustrated using three real life datasets and results reveale...

Abstract Biochemical methane potential (BMP) tests are the most reliable method for direct evaluation of yield from a specific feedstock in anaerobic digestion. However, these time-consuming (about 1 month) and quite expensive (need no less than two or three replicates). This study evaluates accuracy “first-order kinetic”, “logistic” “Gompertz” models predicting BMP values, calibrating models’ ...

Deviations from the Gompertz law of exponential mortality increases in late-middle and early-old age are commonly neglected in overall mortality analyses. In this study, we examined mortality increase patterns between ages 40 and 85 in 16 low-mortality countries and demonstrated sex differences in these patterns, which also changed across period and cohort. These results suggest that the intera...