Güncel Gönderiler: Fen Edebiyat Fakültesi
Toplam kayıt 1429, listelenen: 701-720
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Synthesis of methyl (E)-2′,4″-thiazachalcones and their N-alkyl derivatives, photochemistry with theoretical calculations and antimicrobial activities
(TUBİTAK, 2009)A series of 9 new (E) -thiazachalcones (1-3), and their N -alkyl substituted derivatives (4-6), and stereoselective dimerization products (7-9) were synthesized, then tested for antimicrobial activity against all test ... -
Determination of levitation force and pinning properties of (Sm123) 1-x(Yb211) x bulk superconductor depending on Yb211 doping ratio
(Wiley, 2009)The vertical force density curves of (Sm123) 1-x(Yb211)x high temperature superconductor (HTS) samples prepared by a meltpowder-melt-growth technique were measured during vertical and lateral traverses in zero field cooling ... -
The effective-field study of a mixed spin-1 and spin-5/2 Ising ferrimagnetic system
(2009)An effective-field theory with correlations is developed for a mixed spin-1 and spin-5/2 Ising ferrimagnetic system on the honeycomb (?=3) and square (?=4) lattices in the absence and presence of a longitudinal magnetic ... -
Synthesis of some new 1,2,4-triazoles starting from isonicotinic acid hydrazide and evaluation of their antimicrobial activities
(Elsevier, 2009)5-Pyridin-4-yl-1,3,4-oxadiazole-2-thiol (2) was obtained from the reaction of isonicotinic acid hydrazide with carbon disulfide in basic media and converted into 4-amino-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol (5) by the ... -
The microwave-assisted synthesis and characterization of novel, octakis(2-hydroxyethoxy)resorcinarene bridged polymeric metallophthalocyanines
(Elsevier, 2009)The new metallophthalocyanine (Zn, Cu, Ni, Co) polymers containing 4,6,10,12,16,18,22,24-octakis(2-hydroxyethoxy)-2,8,14,20-tetramethylresorcinarene are described. Firstly, 4,6,10,12,16,18,22,24-octakis(2-hydroxyethoxy)- ... -
Photosystem II functionality and antioxidant system changes during leaf rolling in post-stress emerging ctenanthe setosa exposed to drought
(2009)We studied the changes in antioxidant system and chlorophyll fluorescence parameters in post-stress emerging Ctenanthe setosa (Rosc.) Eichler (Marantaceae) plants (PSE plants) having reduced leaf area under drought stress ... -
The relationship between leaf rolling and ascorbate-glutathione cycle enzymes in apoplastic and symplastic areas of Ctenanthe setosa subjected to drought stress
(2009)The ascorbate-glutathione (ASC-GSH) cycle has an important role in defensive processes against oxidative damage generated by drought stress. In this study, the changes that take place in apoplastic and symplastic ASC-GSH ... -
Fourier method for a quasilinear pseudo-parabolic equation with periodic boundary condition
(2009)A multidimensional mixed problem with Neuman type periodic boundary condition is studied for quasilinear pseudo-parabolic equation ?u/?ta2 ?2u/?x2 - ? ?3u/?t?x2 = f(t, x, u). The existence, uniqueness and also convergence ... -
The influence of substrate temperature on the morphology, optical and electrical properties of thermal-evaporated ZnTe Thin Films
(Elsevier, 2009)The structural, morphological, optical and electrical properties of ZnTe films deposited by evaporation were investigated as a function of substrate temperature (at -123 and 27 °C) and post-deposition annealing temperature ... -
3-Ethyl-4-(p-chlorobenzylidenamino-4,5-dihydro-1H-1,2,4-triazol-5-one (EPHBAT) as precipitant for carrier element free coprecipitation and speciation of chromium(III) and chromium(VI)
(Elsevier, 2009)A method for the separation and speciative determination of Cr(VI) and Cr(III) has been developed. The procedure is based on coprecipitation of Cr(III) on 3-ethyl-4-(p-chlorobenzylidenamino-4,5-dihydro-1H-1,2,4-triazol-5-one ... -
Novel phthalocyanines containing substituted salicyclic hydrazone-1,3-thiazole moieties: Microwave-assisted synthesis, spectroscopic characterization, X-ray structure and thermal characterization
(Elsevier, 2010)Novel, metal-free and metallo(Cu, Co, Ni, Zn, Pb and Mn)phthalocyanine compounds were synthesized by exposure to microwave irradiation and the products purified. The newly prepared compounds were characterized using elemental ... -
The spectral, structral and thermal characterizations of dimethyl sulphoxide, pyridine, ethanolamine and N-methyl formamide intercalated kaolinites
(Verlag der Zeitschrift fur Naturforschung, 2010)The intercalation of dimethyl sulphoxide (DMSO), pyridine (Py), ethanolamine (Ea), and Nmethyl formamide (NMF) molecules into the kaolinite interlayers led to an appreciable decrease of 3697 cm-1 of the hydroxyl band. The ... -
Isolation and characterization of entomopathogenic fungi from hazelnut-growing region of Turkey
(Springer Link, 2010)Although Turkey is the first among all hazelnut-producing countries, yield per unit area of this crop is low in comparison to other countries, mainly because many insect species seriously damage hazelnut trees and their ... -
Vacancy transfer probabilities from K to L shell for low atomic number elements at 5.96 keV
(Polish Academy of Sciences, 2010)Vacancy transfer probabilities from K to L shell were measured using I K?/IK? intensity ratios for six elements in the atomic region 16 ? Z ? 22. The K X-rays from the targets excited by 5.96 keV (1.85 GBq 55Fe filtered ... -
Phytosociological and ecological structure of Mediterranean enclaves along the stream valleys in inner parts of black sea region
(2010)In this study, phytosociological structure of Mediterranean enclaves which occured along the stream valleys in inner parts of Black sea region was investigated. Pinus brutia var. brutia and Quercus coccifera are the most ... -
Suborbital graphs for a special subgroup of the normalizer of Γ0 (m)
(Shiraz University, 2010)In this paper, we find the number of sides of circuits in suborbital graph for the normalizer of ?0(m) in PSL(2,R), where m will be of the form 2p2, p is a prime and p ?1 (mod 4). In addition, we give a number theoretical ... -
Screening of entomopathogenic fungi against the European spruce bark beetle, Dendroctonus micans (Coleoptera: Scolytidae)
(Taylor & Francis, 2010)The European spruce bark beetle, Dendroctonus micans Kugelann (Coleoptera: Scolytidae), is one of the most serious destructive pests of oriental spruce (Picea orientalis L.). In order to find an effective biocontrol agent ... -
Inorganic and organic solutes in apoplastic and symplastic spaces contribute to osmotic adjustment during leaf rolling in Ctenanthe setosa
(Polish Academy of Sciences Publishing House, 2010)In Ctenanthe setosa we studied changes in apoplastic and symplastic sugar, proline, ions and organic acids under drought stress causing leaf rolling. Leaf extractions were made at visually judged leaf rolling stages (not ... -
Composition and antimicrobial activity of the essential oils from flowers of Senecio othonnae, S. racemosus, and S. nemorensis
(Natural Product Incorporation, 2010)The chemical composition of the essential oils of Senecio othonnae, S. racemosus, and S. nemorensis obtained by hydrodistillation of fresh flowers were analysed by GC-FID and GC-MS. A total of seventy-six compounds were ... -
Solution of a mixed problem with periodic boundary condition for a Quasi-linear Euler-Bernoulli equation
(Hacettepe University, 2010)In this paper, the existence and uniqueness of the weak generalized solution of a mixed problem with periodic boundary condition for a quasi-linear Euler-Bernoulli equation are examined, and an estimation of the differences ...
