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Direct Electrochemical Synthesis of Mono, Bi And Polynuclear Complexes of Some Hydrazide and Hydrazone Derivatives
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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 ...
Formation of Usual and Bridging Complexes using organoselenium and -Tellurium compounds
(
Qatar University
, 2005 , Article)
The reactions of l,3-benzoselenadiazole with some diiodo selenium and tellurium heterocyclic compounds have led to the formation of charge transfer complexes. From the same reactions but in the presence of I9PtC14 new types ...
فعالية استخدام تقنية التشعب النصي في تدريس الكيمياء لطالبات السنة الأولى في المستوى الجامعي لكلية العلوم جامعة الملك عبد العزيز بجدة
(
Qatar University
, 2004 , Article)
يتناول البحث الحالي التحقق التجريبي من فعالية استخدام تقنية التشعب النصي Hypertext كخاصية من خواص معالجة النصوص لتكوين قاعدة بيانات يتم الربط بينها باستخدام مجموعة من الإحالات المرجعية cross-references تسهل على القارئ ...
Oxidative Addition Reactions of Sn(II) And Pb(II) with Some Hydrazide And Hydrazone
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Qatar University
, 2000 , Article)
Bivalent tin compounds can be easily transformed to tetravalent compounds by oxidizing agents. The use of ortho-quinones for oxidation of transition metals has been the subject of many publications, but few analogous studies ...
Flavonoids From Cressa Cretica
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Qatar University
, 2005 , Article)
The aerial parts of Cressa cretica L. yielded five flavonoids that were identified as quercetin (1), quercetin-3-B-O-D-glucoside (2), kaempferol-3-O-B-D-glucoside (3), kaempferol-3-O-a-L-rhamno-(1—+6)- B-D-glucoside (a) ...
Investigation of Magnesium (II), Calcium (II) and Barium (II) Complexes in Aqueous Solution
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Qatar University
, 2005 , Article)
The ionic association constants, K6, of Mg, Ca and Ba metal ions with succinate, malate and tartrate ligands were conduct metrically determined in water at 25-40°C. The conductometric data were analysed by the Shedlovsky ...
Evaluation of Electron Swarm Parameters in SF6 Using Monte Carlo Method
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Qatar University
, 2005 , Article)
The motion of electrons in sulfur hexafluoride (SFo) in uniform electric fields is simulated using a Monte Carlo method. The swarm parameters are evaluated and compared with experimental results of drift velocity, electron ...
Corrosion of n-GaAs/aqueous Photoelectrochemical Cell
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Qatar University
, 2005 , Article)
A combination of electrochemical studies, scanning electron microscopy, SEM, and light reflectivity measurements reveals information about the corrosion of enlightened n-GaAs in various aqueous electrolytes. The corrosion ...
Synthesis and Spectroscopic Studies ofAtenolol Derivatives with Enhanced Lipophilicity as Potential Prodrugs
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Qatar University
, 2002 , Article)
Atenolol, a selective pi-adrenoceptor blocking agent is characterized by its low bioavailability. A number of atenolol prodrugs were synthesized to improve its lipid solubility and hence bioavailability. These compounds ...
Trace Metals in Wastewater Ponds in Qatar
(
Qatar University
, 2002 , Article)
A one-year monitoring program was conducted to determine the extent of metal contamination in two wastewater ponds in Qatar. Abu-Hamour pond receives untreated domestic and industrial waste while Abu-NakhIa pond receives ...