Isolation of Highly Pure Substances from Essential Oils: Efficiency Improvement by Combination of Different Thermal Separation Processes

‏‎suppression of coke formation in thermal cracking by coke inhibitors‎‏

‏‎the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...

Separation of Substances from Highly Viscous Systems by High Pressure Extraction Processes

Separation or formulation of products by supercritical fluids and production of substances and composites with unique properties and characteristics for the use in different applications are nowadays intensively studied. One of the most important advantages using supercritical fluids is selective extraction of components or fractionation of total extracts. As yet, industrial dense gas extractio...

the role of application of dynamic assessment approach in improvement of iranian efl writing performance at different language proficiency levels

the present study sought to investigate the role of dynamic assessment (da) in improvement of iranian efl writing performance at different language proficiency levels. to this end, after conducting the quick placement test, 60 iranian efl learners were assigned to two groups with different language proficiency levels. in both groups each participant wrote two compositions, one before and one af...

Phase - Change Processes of Pure Substances

Composition of the Essential Oils of Thymus deanensis Celak Var. deanensis from Different Regions of Iran

Background: Thymus deanensis is a known aromatic plant which grows widely in Iran and many mediterranean regions. In previous studies composition of essential oils of many species of Thymus genus reported which they were rich of phenols like Thymol and Carvacrol. Methods: Water distilled essential oils from aerial parts of Thymus deanensis var. deanensis from three different localities in Iran...