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Toplam kayıt 1343, listelenen: 151-160
Climatic preferences and distribution of 6 evolutionary lineages of Typhlops vermicularis Merrem, 1820 in Turkey using ecological niche modeling
(Tubitak Scientific & Technical Research Council Turkey, 2015)
According to evolutionary biologists, ecology is a very important factor in speciation. Ecology may be effective at driving adaptive divergence between lineages in different environments and climatic conditions. Because ...
Microwave-promoted synthesis and biological activity of some 2-hetarylmethyl-4-(4-hetarylphenyl)-5-methyl-2,4-dihydro-3H-1,2,4-triazol-3-one derivatives
(Springer, 2015)
A series of fused and non-fused 1,2,4-triazole derivatives were prepared starting from ethyl 4-[1-(2-ethoxy-2-oxoethyl)-3-methyl-5-oxo-1,5-dihydro-4H-1,2,4-triazol-4-yl]benzoate. Firstly, both ethyl ester groups were ...
An unsymmetrical ferrocene based azine and its Cu(II) complex: Spectroscopy, crystal structure, electrochemistry and DFT calculations
(Elsevier Science Sa, 2015)
An unsymmetrical ferrocenyl-substituted azine ligand and its Cu(II) complex have been prepared in this study. the redox active ferrocene-based azine ligand was obtained by condensation of 2-methanehydrazonoylphenol and ...
Determination of natural radioactivity by gross alpha and beta measurements in tap waters in Rize province
(Springer, 2015)
The aim of the study to determine the level of gross alpha and beta activity concentrations in tap waters in dwellings of Rize province from North part of Turkey after 27 years from Chernobyl disaster. the activity ...
Distribution of beta-lactamase genes among carbapenem-resistant klebsiella pneumoniae strains isolated from patients in Turkey
(Korean Soc Laboratory Medicine, 2015)
Background: the emergence of carbapenem-resistant Klebsiella pneumoniae poses a serious problem to antibiotic management. We investigated the beta-lactamases in a group of carbapenem-resistant K. pneumoniae clinical isolates ...
Radioactivity and heavy metal concentrations in various honey samples
(Scibulcom Ltd, 2015)
In this study, the contents of natural radionuclide K-40 and fission product Cs-137 in floral honey samples from Rize and some other cities in Turkey, were investigated. the results indicated that 80% of honey samples were ...
Structural characterization of hexadecyltrimethylammonium-smectite composites and their potentiometric electrode applications
(Elsevier, 2015)
Organosmectites were prepared by the intercalation of hexadecyltrimethylammonium cations at various ratios into interlayer of Unye smectite. Structural, thermal, morphological and textural properties of the synthesized ...
Synthesis and biological evaluation of new 1,2,4-triazole derivatives with their potentiometric titrations
(Springer Birkhauser, 2015)
In the present study, 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones (1a, b, d-g) reacted with 3-phenoxybenzaldehyde to afford 3-alkyl(aryl)-4-(3-phenoxy-benzylidenamino-4,5-dihydro-1H-1,2,4-triazol-5-ones (2a, ...
Pollinarium morphology of Vincetoxicum (Apocynaceae: Asclepiadoideae) in Turkey
(Magnolia Press, 2015)
In this study, the pollen morphology of 20 representatives of ten taxa of Vincetoxicum from Turkey was observed under a scanning electron microscope and light microscope. Observations showed that each flower contained five ...
Representations by octonary quadratic forms with coefficients 1, 3 or 9
(World Scientific Publ Co Pte Ltd, 2015)
Using modular forms, we determine the number of representations of a positive integer by diagonal octonary quadratic forms with coefficients 1, 3 or 9.