مهرنوش محرابی

Using alkanolamine in aqueous and hybrid context is an appropriate method for sweetening natural gas in oil and gas refineries. The environmental effect (aqueous or hybrid) of alkanolamine formulations can be important in the rate of thermal degradation of amine. In this work, the rate of thermal degradation of monoethanolamine (MEA) and methyl diethanolamine (MDEA) in the loaded state (presence of CO2) and in aqueous and hybrid environment (sulfolane + water) and temperature of 145 ◦C using gas chromatography device was investigated. To confirm and justify the products resulting from the thermal degradation of MDEA by the presented mechanisms, the experimental test was repeated in the aqueous environment for a temperature of 160◦C. The thermal degradation of MEA and MDEA in both environments is of the first order. The pseudo-first-order rate constant for a 20 wt.% solution of MEA at a temperature of 145 ◦C in an aqueous medium is (6.28±0.1) × 10-8 and in the hybrid medium, it was obtained (2.26±0.3) × 10-8 per second, and for the degradation of 40 wt.% solution of MDEA in aqueous medium at 145◦C and 160 ◦C, it was equal to 3.19× 10-8 and 2.12 × 10-7 respectively, and for the hybrid medium at 145 ◦C it was 8.09 × 10-8 seconds. Degradation of MDEA at a temperature of 160 ◦C is faster and with more diverse products than at a temperature of 145 ◦C and also the pseudo-first-order rate constant of thermal degradation of MDEA and MDE in the hybrid environment is larger than in the aqueous environment. It is expected that the path of thermal degradation of MDEA takes place through the nucleophilic attack of the amine group and the transfer of the methyl or hydroxy ethyl group from the protonated amine to the attacking nucleophilic molecule.

Acceptance of information technology is very important for technology success in a community. Connected Vehicle Technology (CVT) is one of the new information technologies in Iran. forecasting the acceptance of this technology is very important for policy makers and investors. Thus, this paper based on UTAUT model of acceptance and a survey about taxi drivers tries to evaluate acceptance of Connected Vehicle Technology (CVT). for data analysing, using SPSS software, "t" test and ANOVA were used. briefly Results show that ragarding UTAUT model, performance expectancy and social influence are good but effect expectancy and facilitating conditions are not very good.

This article compares the motif invulnerability in greek , Persian and Germanic mythology , specially in three greatest world literary epics : "Iliad , Shahnameh and Nibelungenlied " . The central figures of the epics are mythical gods and
Heroes, supernatural beings and wonder animals . Mythology is about myths and myths belong to people and addresses their origin, history, ancestors, and heroes .It is also about magical qualities of heroes like invulnerability . Invulnerability is one of the major motifs in mythology . Invulnerable heroes have in spite of their strength a blind spot and a deadly weakness which can actually lead to their downfall .Although Achilles , Siegfried and Esfandiar qualify as great , mighty men of these great works and have powers of invulnerability eventually die and their death is a direct consequence of the deception. As these three epics root in Indo-germanic languages , we can assume that they may have a similar history and culture . This article attempts to find such similarities of the mythical motif " Invulnerability " .