quantitative analysis of production through evaluation of inputs consumption quantity is of main principles in agricultural policies, which is followed by increasing in production through optimal use of resources. this study has been conducted to estimate different types of production functions in mechanized farms of broiler chicks located in gorgan city. cross-section survey data were gathered...

The basic assumption in the traditional inventory model is that all outputs are perfect items. However, this assumption is too simplistic in the most real-life situations due to a natural phenomenon in a production process. From this it is deduced that the system produces non-perfects items which can be classified into four groups of perfect, imperfect, reworkable defective and non-reworkable d...

high groundwater salinity, a high water table and secondary soil salinization are dominant conditions in eastern isfahan province, iran. this region has a low annual rainfall, high annual evaporation demand, saline soils and limited fresh water supplies. to investigate the effects of irrigation deficit and salinity on cantaloupe (cucumis melo l. var. cantalupensis) production, a field experimen...

minimum profitability of production factors is one of the most important economic features in the rural areas of iran. profitability of production factors such as land, water, capital etc. is in its lowest level in the rural areas of the country. rural economy is dependent to the agricultural economy up to a great extent. the most important factors in keeping profitability of production factors...

many organisms produce lactic acid by fermentation, but most industrially important strains are from the genus lactobacillus and rhizopus oryzae. l(+)-lactic acid is the only optical isomer for use in pharmaceutical and food industries because human body is only adapted to assimilate this form. in this research, six strains of lactobacillus and four strains of r. oryzae (known as high producer)...

Mn- micronodules and nodules of the Clarion-Clipperton zone (Pacific Ocean) are composed 10 Å 7 phyllomanganates, δ-MnO2. The Mn-micronodules built fine concentric growth layers three types (1, 2a, 2b) according to their Mn/Fe ratio Ni, Cu, Co content. Applying previously developped geochemical discrimination approaches we found that were diagenetic precipitates a result suboxic diagenesis, whe...

Abstract Background Laboratory measurements of trace elements such as magnesium (Mg), copper (Cu) and zinc (Zn) in red blood cells (RBCs) are used to assess nutritional status diagnose metal toxicity. The purpose this study was develop/validate an ICP-MS method for the quantification these RBCs. Methods An aliquot packed RBCs diluted alkaline diluent solution containing scandium (45Sc) gallium ...

Production systems with scrapped and rework items have recently become an interesting subject of research. While most attempts have been focused on finding the optimal production quantity in a simple production system, little work appears on a joint production environment. In this research, two joint production systems in a form of multiproduct singlemachine with and without rework are studied ...

The 2 1 st century challenges for genetic improvement are as they have always been and as they will always be for any century: lkeep it simple; 2harness the theory and the practice of selection into the shaping of an ideal that is economically meaningful within the context of the specific production and marketing environments; 3creatively and effectively combine the available stocks in the shap...