BACKGROUND The assessment of the cost of production and the relative weight of the different production parameters is very important in pig farming. The goals of the present work were 1) to describe reliable reference values for production parameters and pig production cost from 2010 to 2014, 2) to describe their temporal evolution and 3) to determine the influence of the pig company size on th...

in this study test-day records of milk (kg), fat (g), and protein (g) yields, somatic cell score (scs, cells/ml) collected by animal breeding center of iran during 2007 and 2009 were used to estimate genetic parameters using random regression model. models with different order of legendre polynomials were compared using bayesian information criterion (bic).for milk, fat yield and scs genetic an...

determining production rate considering costs and revenues in order to maximize profit is one of the applied problems in small and medium size factories. mostly existing models in production planning consider production system statically and specify production rate, although the factors determining production rate include many different changes in practice. in fact, by increasing the production...

homogenizer and ultrasonicator that we call as mechanical methods were used in the lab scale production of alcohol free reduced glutathione (alcohol free gsh) from baker’s yeast. the study was done to determine the effects of specific parameters of the methods and the ph of the medium on the production of the gsh. the cell disruptions were run at a wide range of those parameters at the suitable...