نتایج جستجو برای: melting points

تعداد نتایج: 291120  

*, Mohammad Hassan Zahmatkesh Bakhtiar Azadbakht, Kamal Haddad Saeid Bagheri

Introduction: The PAGAT polymer gel dosimeter melts at 30 ˚C and even at room temperature during the summer, so it needs to be kept in a cool place such as a refrigerator. To increase the stability of the PAGAT gel, different amounts of agarose were added to the PAGAT gel composition and the PAGATA gel was manufactured. Material and Methods: The PAGATA gel vials were irradiated using a Co-60 ma...

Journal: :The Journal of the Society of Chemical Industry, Japan 1964

Journal: :The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 1879

2016

The melting point is one of the most fundamental and practically important properties of a compound. For this reason molecular simulation methods have been developed aiming towards accurate computation of melting points. Knowledge of the melting point before a compound has been synthesized could significantly accelerate the design of new materials. Generally, the molecular simulation methods de...

Journal: :iranian journal of medical physics 0
bakhtiar azadbakht instructor, medical radiation engineering dept, faculty of engineering, borujerd islamic azad university, borujerd, iran. *, mohammad hassan zahmatkesh associate professor, shahid beheshti university, evin, tehran, iran kamal haddad associate professor, nuclear engineering dept, faculty of engineering, shiraz university, shiraz, iran. saeid bagheri m.sc. in medical physics, shahid beheshti university, tehran, iran

introduction: the pagat polymer gel dosimeter melts at 30 ˚c and even at room temperature during the summer, so it needs to be kept in a cool place such as a refrigerator. to increase the stability of the pagat gel, different amounts of agarose were added to the pagat gel composition and the pagata gel was manufactured. material and methods: the pagata gel vials were irradiated using a co-60 ma...

Elham Tahanpesar, Leila Sarami

The Pechmann condensation has been used as a simple and efficient method for the preparation of coumarin derivatives, which phenols and ethyl acetoacetate were reacted in the presence of AlCl3 supported on nano silica as an efficient catalyst at 110 oC under solvent free condition to form products with good to excellent yield (55 -90%), which are identified by spectroscopic method ( FT-IR, NMR)...

Farhad Hatamjafari

An efficient protocol for the synthesis of 3,4-dihydropyrimidin-2-(1H)-one/thione derivatives via multi-component coupling reaction of aromatic aldehydes, β-ketoester and urea or thiourea under solvent-free conditions using Silica Supported Barium Chloride as a catalyst is described. All prepared compounds with melting points, IR,1H NMR and 13C NMR were identified. High yields, mild conditi...

Elham Tahanpesar, Leila Sarami

The Pechmann condensation has been used as a simple and efficient method for the preparation of coumarin derivatives, which phenols and ethyl acetoacetate were reacted in the presence of AlCl3 supported on nano silica as an efficient catalyst at 110 oC under solvent free condition to form products with good to excellent yield (55 -90%), which are identified by spectroscopi...

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