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Browsing Qatar University Science Journal - [From 1981 TO 2007] by Subject 
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    Browsing Qatar University Science Journal - [From 1981 TO 2007] by Subject "الكيمياء الفيزيائية"

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        Azo-Hydrazo Tautomerism: Further Evidence Based On Polarographic Reduction And Acidity Function Of Some Heterocyclic Compounds Containing Oximino-Group 

        Helmy, Ahlam M. A. [احلام عباس حلمي]; El-Shafei, Alaa; Migahed, M. A.; Morsi, M. A. ( Qatar University , 1994 , Article)
        Potentiometric pKa and polarographic behaviour of l,3-indandione-monoxime-2-phenyl azo and four of its substituted derivatives were investigated in buffer solution of pH -2-12. The results showed that the compounds are in ...
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        Charge transfer complex formation constants of edta with methylviologen And its zwitterionic derivatives 

        Ismail, Kamal Z. [كمال زكي اسماعيل] ( Qatar University , 1994 , Article)
        In the photochemical cycle of the labelled, tris (2,2'bipyridine) ruthenium(II), Ru(bpy)32+, the photo excited label is oxidized through electron transfer quenching by methylviologen (l,l'-dimethyl-4,4'-bipyridinium dication, ...
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        Correlations of partition data of carboxylic acids in water/organic solvent Systems with solvatochromic parameters 

        Fandary, Mohamed S. H. [محمد الفندري]; Hegazi, Mohamed F. ( Qatar University , 1994 , Article)
        The partition coefficients of C2-Cg carboxylic acid monomeric forms between water and various organic solvents as well as the dimerization constants have been shown to be well correlated in terms of the solvatochromic ...
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        Effect Of Cationic And Anionic Surfactants On Electrokinetic Potentials Of Cassiterite And Quartz In Presence Of Polyvalent Cations 

        Taha, Fouad [فؤاد طه]; Attiya, Khairy M. E.; Saleh, Mohammed B.; Khalaf, Moustafa M. R. ( Qatar University , 1994 , Article)
        The effect of different polyvalent electrolytes (FeCl3, AICI3, LaCl3, CeCl3 and TI1CI4) on adsorption of different surfactants (primary amine hydrochloride, sodium oleate, sodium dodecyl sulfate and phenyl disodium ...
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        Effect of chemical grafting on the surface structure of porous bentonite as a support in gas chromatography 

        Ramadan, Abed A. [عبد العزيز رمضان]; Antakli, Saad; Sakur, Amir Alhaj ( Qatar University , 1994 , Article)
        The effect of thermal and chemical treatments on the variation of specific surface area of porous bentonite as a support was studied. The surface area of bare bentonite thermally treated at 950°C and then washed with ...
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        Electrochemical behaviour of some pyrimidine derivatives: polarographic reduction of 1, 3-dimethyl-2, 4, 6(1h, 3h, 5h) pyrimidinetrione and its substituted 5-phenylazo 

        Helmy, Ahlam M. A. [احلام عباس حلمي]; Migahed, M. A.; Morsi, M. A. ( Qatar University , 1994 , Article)
        The polarographic behaviour and spectrophotometric pKa of 1,3-dimethyl barbituric acid and 5-phenylazo substituted products were investigated in buffer solution of pH ~ 2-11. The results revealed an azo form of the substituted ...
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        Spectroscopy in Corrosion Studies of Copper 

        El Samahy, A. A. [احمد عبد الله السماحي]; El-Khatib, R.; El-Cheikh, F. M. ( Qatar University , 1994 , Article)
        Spectrophotometric measurements were used to study corrosion of copper in aqueous solutions containing the four following depolarizers: K2Cr2O-j, K2S2O8, Fe(NH4)(SC>4)2 and CCI3COOH. A silica cell was used for the corrosion ...
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        Synergistic effect of amino acids and chloride ion on adsorption On copper metal 

        Gomma, Gamal E. K. [جمال ك. جمعة]; Wahdan, Mostafa H. M. ( Qatar University , 1994 , Article)
        The effect of adsorption of a- alanine, P-alanine, DL-aspartic, L-glutamine, iso-leucine and L-lysine in 1 M HC1 solution on the corrosion of copper has been studied using the potentiokinetic technique. The examined amino ...

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