This work aims to propose a new model named Gompertz-Von Bertalanffy bicompartmental (GVB), combination of the models Gompertz and Von Bertalanffy. The GVB is applied fit kinetic curve cumulative gas production (CGP) four foods (SS – sunflower silage; CS corn mixtures 340SS 660 gkg-1 silage 340 660SS silage). compared Logistic-Von (LVB) logistic (BL). All process studied employed semi-automatic...

to study the potential of production of biogas, utilizing the wastes of rose distillation process, the wastes were mixed with cow manure at manure proportions of 5, 10, 15 and 20% and in temperatures at two levels of 35 and 45 °c. the treatments were carried out using a 2×4 factorial design (?=0.05). the volumes of produced gas and generated methane were recorded daily and modeled as functions ...

Abiotic and biological factors have been hypothesized as controlling maximum body size of tetrapods and other animals through geological time. We analyse the effects of three abiotic factors--oxygen, temperature and land area--on maximum size of Permian-Jurassic archosauromorphs and therapsids, and Cenozoic mammals, using time series generalized least-squares regression models. We also examine ...

A total of 16 data sets on wild and cultivated fishes, crustaceans and molluscs were used to test and compare conventional growth curves (von Bertalanffy, Logistic, Gompertz and Richards) and a new growth model. Statistical properties for estimation of the models were evaluated and compared to determine suitability. The absolute value of the Hougaard measure of skewness of parameter estimates (...

Abstract In this paper, we report the thermal adaptation of Pseudomonas pseudoalcaligenes, characterized as changes in growth parameters. Six clones derived from a single colony of P. pseudoalcaligenes were cultured in two different temperature regimes for 10 months, with three clones forming the control group, cultured at a constant temperature, and another three clones forming the high-temper...

Standard models for senescence predict an increase in the additive genetic variance for log mortality rate late in the life cycle. Variance component analysis of age-specific mortality rates of related cohorts is problematic. The actual mortality rates are not observable and can be estimated only crudely at early ages when few individuals are dying and at late ages when most are dead. Therefore...

Four mortality models: Gompertz, Makeham, Logistic and Coale Kisker models have been considered for a comparative study of OldAge Mortality for both male and female based on reliable data of ten countries. Sufficiently long run of reliable data selecting from ten countries: Australia, Hong Kong, Canada, England, Israel, Japan, New Zealand, Poland, Singapore, United Kingdom have been used for th...

This study was performed to develop a predictive growth model of Listeria monocytogenes to ensure the safety of raw pork. The pork samples were inoculated with a cocktail of two L. monocytogenes strains ATCC 15313 and L13-2 isolated from pork and were stored at 5, 15, and 25 C. Results were evaluated using the MicroFit program. To develop primary models, the Baranyi, modified Gompertz, and Logi...