تصفح حسب المؤلف "Amin, R. R."
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chelating behaviour of 1,1,3,3-propanetetrasalisoyl tetracarbohydrazone
El Asmy, A. A. [احمد فوزي عبد الحميد العصمي]; Al-Ansi, T. Y.; Mabrouk, H. E.; Amin, R. R.; El-Shahat, M. F. ( Qatar University , 1994 , Article)The reaction of 1,1,3,3-propanetetrasalisoyltetracarbohydrazone (HgPTSTCH) with some metal ions in ethanol-aqueous medium has been studied. The isolated complexes were formulated as [Cu4(PTSTCH)8H2O] 4H2O, [Co4(PTSTCH) ... -
Direct Electrochemical Synthesis of Mono, Bi And Polynuclear Complexes of Some Hydrazide and Hydrazone Derivatives
El Asmy, A. A. [احمد فوزي عبد الحميد العصمي]; Amin, R. R.; Al-Ansi, T. Y.; El-Shahat, M. F. ( Qatar University , 2000 , Article)Transition metal complexes of mono-, di- and tetrahydrazides and their hydrazones have been prepared by electrochemical techniques using the metal as a sacrifical anode. The electrochemical oxidation of Co, Ni and Cu in ... -
Effects of the electric field and gamma Radiation on the optical properties of Modified low density polyethylene
Kassem, M. A. [محمد السيد قاسم]; Mahmoud, H.; Amin, R. R.; El-Muraikhi, M. ( Qatar University , 1997 , Article)The effect of electric field and gamma radiation on the optical properties of low density polyethylene LDPE grade CD 0230 have been studied. The samples were irradiated at gamma doses of 0-100 Mrad and varying electric ... -
Iodometric microdetermination of phosphorus in organic compounds by use of An amplification reaction
Al Kubaisi, A. H. [عبد الله حسين الكبيسي]; Farag, A. B.; Amin, R. R. ( Qatar University , 1994 , Article)A high chemical amplification method is described for the iodometric microdetermination of phosphorus in organic compounds. This method depends on combustion by the oxygen flask, absorption of the combustion products in ...