Güncel Gönderiler: Fen Edebiyat Fakültesi
Toplam kayıt 1429, listelenen: 621-640
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4-Amino-3,5-diethyl-4H-1,2,4-triazole at 100 K: Chains of edge-fused R 44(10) and R44(20) rings
(Wiley, 2007)The title compound, C6H12N4, has four crystallographically independent mol-ecules in the asymmetric unit. Inter-molecular N - H?N hydrogen bonds involving amino groups and triazole N atoms form a three-dimensional framework ... -
Critical state magnetostriction of type-II superconductors under viscous flux flow
(Elsevier, 2007)We have studied theoretically the influence of the viscous flux flow on the magnetostriction for the infinite slab of type-II superconductors employing critical state model. The critical current density is chosen to be ... -
Newly synthesized bentonite-histidine (Bent-His) micro-composite affinity sorbents for IgG adsorption
(Elsevier, 2007)Bentonite has several advantages for use as a support, including its lack of toxicity, chemical reactivity and hydrophilicity allowing easy fixation of biomolecules. A new approach was developed to obtain an efficient and ... -
A study on 4-acylamino-4,5-dihydro-1H-1,2,4-triazol-5-ones
(2007)Five novel 3-alkyl-4-phenylacetylamino-4,5-dihydro-1H-1,2,4-triazol-5-ones (2) were synthesized by the reactions of 3-alkyl-4-amino-4,5-dihydro-1H-1,2,4- triazol-5-ones (1) with phenylacetyl chloride and characterized by ... -
The viscous flux-flow effect on the pinning induced magnetostriction of type-II superconductors
(2007)We have investigated the magnetostriction of type II superconductors under the viscous flux-flow. The critical state approach was employed to obtain the magnetostriction loops versus applied field. The flux profile equations ... -
Essential oil compositions of four mushrooms: Scleroderma verrucosum, Cortinarius infractus, Hypholama capnoides and Hypholama fasciculare from Turkey
(2007)The chemical composition of the essential oils obtained from four varieties of Mushrooms, ie. Scleroderma verrucosum, Cortinarius infractus, Hypholama capnoides and Hypholama fasciculare were analyzed by GC-MS. 13, 36, 8 ... -
K-shell X-ray fluorescence cross-sections and intensity ratios for some pure metals at 59.5 and 123.6 keV
(Elsevier, 2007)K-shell X-ray fluorescence cross-sections for some pure metals such as Cr, Fe, Co, Cu, Zn, Ga, Se, Y, Mo, Cd, In, Sn, Te, Ba, Ta, W and Bi have been theoretically and experimentally determined. The Cr, Fe, Co, Cu, Zn, Ga, ... -
Chemical composition and antimicrobial activities of the essential oil from the flowers of Delphinium formosum
(2007)The essential oil from the flowers of Delphinium formosum Boiss. et Huet. (Ranunculaceae) was obtained by hydrodistillation in a Clevenger-type apparatus and analyzed by GC-MS. 68 Components were identified in the oil. The ... -
Synthesis, Configuration, and Antimicrobial Properties of Novel Substituted and Cyclized ‘2′,3″-Thiazachalcones’
(Wiley, 2007)Nine new thiazachalcone-based drugs, compounds 1-9, were prepared and fully characterized. The configurations of the photochemical-dimerization products 7-9 were rationalized by semi-empirical calculations. Both the ... -
Molecular epidemiology of clinical Pseudomonas aeruginosa isolates carrying IMP-1 metallo-β-lactamase gene in a university hospital in Turkey
(2007)Pseudomonas aeruginosa isolates carrying IMP- or VIM-type metallo-?-lactamase (MBL) have been increasingly reported in hospitals worldwide. One hundred P. aeruginosa clinical isolates from unrelated inpatients hospitalized ... -
Characterization and pillaring of a Turkish bentonite (Resadiye)
(Elsevier, 2007)The shifts of the Si{single bond}O{single bond}Si stretching and the Si{single bond}O{single bond}Al and Si{single bond}O{single bond}Si bending modes, as well as the free silica peak in the IR spectra and the strengthening ... -
Activation energy U(H) and pinning behavior of Yb-impurity-diffused YBa 2Cu 3O 7-x
(Wiley, 2007)Superconducting Y123 samples were prepared by the solid-state reaction (SSR) method. To get a layer of Yb (thickness ?4 ?m) on the surface of one side of the sample an ultrahigh-vacuum electron-beam deposition system was ... -
Molecular characterization of antibiotic resistant Escherichia coli strains isolated from tap and spring waters in a coastal region in Turkey
(2007)A hundred and seventeen antibiotic-resistant Escherichia coli strains were isolated from public tap and spring waters which were polluted by fecal coliforms. There were no significant differences between two water sources ... -
4-(4-Allyl-2-meth-oxyphen-oxy)benzene-1,2-dicarbonitrile
(Wiley, 2007)In the title compound, C18H14N2O2, the dihedral angle between the two benzene rings is 88.6 (1)°. The allyl group is disordered over two orientations, with refined occupancies of 0.695 (6) and 0.305 (6). The meth-oxy group ... -
Microwave-assisted and conventional synthesis of new phthalocyanines containing 4-(p-fluorophenyl)-3-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one moieties
(Elsevier, 2007)New metal-free and metal (Zn, Ni, Cu and Co) phthalocyanines containing 4-(p-fluorophenyl)-3-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one moiety have been prepared from 1-(3,4-dicyanophenyl)-4-(p-fluorophenyl)-3-methyl-4,5- ... -
Seasonal variation in plant biomass in a salt marsh community in northern Turkey
(2007)Seasonal pattern in above- and belowground live and dead biomass in a salt marsh community was investigated. Multiple peaks were observed in terms of all biomass types. Maximum aboveground live and dead biomass was observed ... -
Determination of radioactivity levels and hazards of soil and sediment samples in Fi{dotless}rti{dotless}na Valley (Rize, Turkey)
(Elsevier, 2007)The natural radioactivity levels in soil and sediment samples of Fi{dotless}rti{dotless}na Valley have been determined. To our knowledge, there seems to be no information about radioactivity level in the Fi{dotless}rti{dotless}na ... -
Synthesis of some N-alkoxycarbonyl-N"-benzoyl-benzamidrazones(p- toluamidrazones) and 1,3,5-trisubstituted 1,2,4-triazole derivatives from N-benzoylimidates and their antimicrobial and anticancer screening studies
(Wiley, 2007)Some new N-alkoxycarbonyl-N?-benzoyl-benzamidrazones (p-toluamidrazones) 3a-3d, and 1,3,5-trisubstituted 1,2,4-triazole 4a-4h derivatives by starting from N-benzoylbenzimidates or N-benzoyl-p-toluimidates. The structures ... -
Microwave-assisted synthesis and characterization and theoretical calculations of the first example of free and metallophthalocyanines from salen type Schiff base derivative bearing thiophen and triazole heterocyclic rings
(Elsevier, 2007)Novel metal-free and metallophthalocyanine complexes of Co, Ni, Cu, and Zn have been synthesized by exposure to microwave irradiation and reflux conditions and the products purified by several techniques. The newly prepared ... -
Ag diffusion in ZnS thin films prepared by spray pyrolysis
(Elsevier, 2007)ZnS thin films were deposited by spray pyrolysis method on glass substrates. Diffusion of Ag in ZnS thin films was performed in the temperature range 80-400 °C under a nitrogen atmosphere. The diffusion of Ag is determined ...
