The equilibrium chemical reactions taken place in a converter reactor of the Khorasan Petrochemical Ammonia plant was studied using the minimization of Gibbs free energy method. In the minimization of the Gibbs free energy function the Davidon– Fletcher–Powell (DFP) optimization procedure using the penalty terms in the well-defined objective function was used. It should be noted that in the DFP...

The purpose of this paper is to streamline the supply corn, one key ingredients in production bioethanol. Using a comprehensive sustainable framework criteria (including social, economic, and environmental dimensions), potential locations corn cultivation Iran are examined from multi-criteria decision analysis perspective. To end, we need find importance relevant evaluation ranking method rank ...

the level of ecomomic (income or expenditure) inequality in khorasan province has been unknown. this paper tries to estimate and compare the trends of expenditure (income) inequality in khorasan province and the whole iran during 1971-2001 in two categories of urban and rural regions. for this purpose, inequality indices (gini coefficient and income deciles) were estimated parametrically. the r...

contagious agalactiae (c.a.) is one of the most common disease affecting small ruminants which is caused by mycoplasma agalactiae. this disease is particularly widespread around the world and iran is one of the countries that c.a. is present. the aim of this study was isolation and identification of m. agalactiae (mg) with culture and pcr technique in milk samples in kordestan province, iran. a...

Since late 2019 many people all over the world have become infected and died due to coronavirus. There been general studies about spread of virus. In this study, new accumulated confirmed cases (NCC ACC), recovered (NRC ARC), deaths (ND AD) were evaluated by geographical properties, meteorological parameters air particulate matters between 3 April 2020 11 June within 15 provinces in Iran. Meteo...

abstract in order to evaluation the effects of price policies (wheat guarantee price in each period and its price lag), environmental (planted area) and climatic (min and max average temperature, total annual precipitation, cold-day degree and hot-day degree) factors, we considered wheat yield in razavi-khorasan province (9 cities) for a 13-year statistical period (1371-72 to 1383-84). in this ...