attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...

The two theories of “ideal observer” and “divine command” are theories on constructionism and voluntarism. According to the ideal theory, ethical realities are defined based on the attitudes of the assumed ideal observers and the foundation of these theories is formed on negation of the independent ethical realities. Therefore, existence of independent and evident ethical realities based on whi...

Al-Birouni's abilities in natural sciences have also affected his historian character. Among his several works, Al-Athar Al-Bakiyah and Tahkik Ma Li-l-Hind are the two most important books written by new method of historiography. Since Birouni has been one of few scholars of experimental sciences who has seriously practiced historiography, analysis of various aspects of his historiography is ne...

Moral sensitivity is the first step in making a moral decision and taking a moral judgment. An effort to promote nurses' moral sensitivity, education of ethical concepts, and using appropriate approaches to teaching ethics is still under discussion. Thus, this study was conducted to determine the effect of virtual teaching of ethical principles through narrative method on the ethical sensitivit...

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...