Browsing QU Ceased Journals by Title
Now showing items 1044-1063 of 2240
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Synthesis and biological testing of 2,4-disubstituted thiazole derivatives as Potential antitumor antibiotics
( Qatar University , 1994 , Article)A series of thiazole derivatives bearing amino, acetamido or thioureido synthons at position 2- and thiosemicarbazone or 1,2,4-triazolethione moieties at position 4- have been synthesized and evaluated for their antimicrobial ... -
Synthesis and reactivity of 2-chloro-4-phenyl-6-p-tolyl-nicotinonitrile Towards some nucleophiles
( Qatar University , 1986 , Article)The synthesis and reaction of 2-Chloro-4-phenyl-6-p-tolyl- nicotinonitrile (I) with hydrazine hydrate, sodium azide and urea to give the corresponding hydrazino tetrazolopyridine and urea derivatives respectively, are ... -
Synthesis and Reactivity of Iron-Iridium Heterobimetallic Complexes Using Tridentate Phosphine Ligands
( Qatar University , 1994 , Article)Treatment of {Fe (CO)3 {(PPh2) 2 C=CH2}] with PPh2H gives the addition product [Fe (CO)3 {(PPh2) 2 CHCH2 PPh2}] (1). The uncoordinated phosphine group of complex 1 reacts with Ir4 (CO)12 to give mono-, di- and tri-substituted ... -
Synthesis And Reactivity Of Substituted Chromones
( Qatar University , 1992 , Article)The synthesis of 2-methyl-and 2-Styryl-6-bromo-7, 8-benzochromone and 2, 6-Dimethylchromone and their reactivity towards cyclo-addition reaction under Diels-Alder conditions and towards nucleophilic and electrophilic ... -
Synthesis And Spectroscopic Properties Of Some Mixed-Ligand Complexes Of Nickel (II), Copper (II), Zinc (II) And Palladium (II) With Biologically Active Nitrogen-Sulphur Containing Molecules
( Qatar University , 1990 , Article)The reaction of the biologically active complexes, chloro-2-acetylpyridinehyd-razinecarbothiopiperidinamide metal (II) and chloro-2-acetylpyridinecar-bothiomorpholinamide metal (11),^, (M=Ni (II), Cu (II), Zn (II) and Pd ... -
Synthesis and Spectroscopic Studies ofAtenolol Derivatives with Enhanced Lipophilicity as Potential Prodrugs
( 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 ... -
Synthesis And Spectroscopic Studies On Some Ruthenium(II) Complexes
( Qatar University , 1994 , Article)The salt [RuCl2(CO)2ln has proved very useful precursor for the syntheses of a variety of organometallic complexes of transition metals. The compounds of dichlorodicarbonylruthenium(II) of the formula [RuCl2(CO)22L] or ... -
Synthesis Of Some Glycyrrhetic Acid Sulfonamide Derivatives With Prospected Antimicrobial Activity
( Qatar University , 1994 , Article)Some glycyrrhetic acid sulfonamide derivatives (I-VIII) were prepared. Apart from their chemical structures which were confirmed by elemental analysis, IR, 'H and ^C-NMR, their behaviour under electron impact was also ... -
Synthesis of some new oximes, thiocarbamates, pyrazolyloxy, isoxazolyloxy, Pyrmidyloxy and pyridyloxy quinolines
( Qatar University , 1994 , Article)The reaction of 1 or its corresponding chalcones 3a-c with hydroxylamine in boiling pyridine gave the oximes 2 or 5a-c respectively in almost quantitative yield. When both 2 and 5a-c were reacted with phenylisothiocyanate, ... -
Synthesis of some newer indazolyl-oxadiazoles, thiadiazoles and 1,2,4-Triazoles
( Qatar University , 1994 , Article)2-Aryl-3-chloro-2H-indazole (4), obtained in excellent yield (>90%) by the action of thionyl chloride on o-azidobenzanilide(3), was allowed to condense with ethyl p-aminobenzoate to afford the corresponding indazolo-ester ... -
Synthesis, spectroscopic and thermal properties of some ionic polymers and polymeric complexes derived from phthaloyl bis (s-methylhydrazinecarbodithioate).
( Qatar University , 1990 , Article)Mono- and bis hydrzides derived from the condensation of S-methylhyd-razinecabodithioate with benzoylchloride and tere- and iso-phthaloydichloride, respectively, were prepared. Their reactions with secondary ... -
Tail Fracture Planes of Autotomy in Geckos
( Qatar University , 1993 , Article)The structure of the tail facture planes was morphologically and histologically studied in two species of geckoid lizards, living in Qatar, Cyrtodactylus scaber and Bunopus tuberculatus. The fracture plane is formed of a ... -
Tail Regeneration after Autotomy in the Geckonid Lizard Bunopus Tuberculatus
( Qatar University , 1993 , Article)Tail regeneration in the geckonid lizard, Banopus tuberculatus was morphologically and histologically studied after induced atutomy. Seventy percent of the tail of each animal, by length, was removed by autotomy. Regeneration ... -
A Tale of two cities and the Abbassid Caliphate 132- 656 /750 - 1258
( Qatar University , 1994 , Article) -
Teach Education: Preparing for the twenty-first century
( Qatar University , 1983 , Article) -
Teacher Evaluation
( Qatar University , 1987 , Article)Teacher evaluation is considered to be a significant issue in education. However, the quality of educational output depends heavily on the quality of the teacher. Therefore, this paper focuses on several factors such as ... -
The teaching of language functions as systematic objective based aproach
( Qatar University , 1985 , Article)At present many foreign language educators derive their wisdom in matters of classroom teaching mainly from linguistics and its related fields of psycholinguistics and sociolinguistics and hardly consult mainstream ... -
The teaching of new language items
( Qatar University , 1984 , Article)In the early days of SUFL * teaching and when the Grammar-Translation method was queen of the day, vocabulary occupied a prominent position in SUFL programmes. However, the fortunes of vocabulary soon changed with the ... -
Teaching Structural Steel Design Using Mathcad Program
( Qatar University , 2000 , Article)This paper demonstrates the integration of Mathcad programming in a steel design course at the University of Qatar. It discusses the advantages of Mathcad programming over other programming formats and provides guidelines ... -
Tectonic Setting and Petrogenetic Evolution of Wadi Erier Rocks, South Eastern Desert, Egypt
( Qatar University , 2003 , Article)A combination of geologic, petrographic and chemical criteria is used to classify the Erier basement rocks into three suites namely, the metagabbro-diorite (MGD) suite, the tonalite-granodiorite (TG) suite and the ...