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Toplam kayıt 194, listelenen: 1-20
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A new adsorptive square-wave stripping voltammetric method for the trace analysis of germanium
(Hacettepe University, 2008)The adsorptive stripping voltammetric determination of trace amounts of germanium(IV) based on the adsorptive accumulation of the germanium(IV)-N-(2-hydroxyphenyl)-3-hydroxysalicylaldimine complex on the hanging mercury ... -
Synthesis of {substituted-[(4-{[4-(carboxymethyl-carbamoyl)phenylimino] methyl}benzylidene)-amino]benzoylamino}carboxylic acids
(2008)Some novel derivatives of methotrexate like compounds 2a-f have been synthesized, using terephthalaldehyde, isophthalaldehyde, 4-aminobenzoic acid and amino acids (glycine, ?-alanine, L-glutamic acid). The structures of ... -
Synthesis of some novel derivatives of 2,6-diaminoanthraquinone dyes
(2008)In present study, some derivatives of 2,6-diaminoanthraquinone dyes are synthesized and their UV-visible spectra are investigated in various conditions. Ten compounds (1a-e) and (2a-e), two of which (1a, 1b) were previously ... -
Optimization of separation of several sulfonamides in acetonitrile-water binary mixtures by using symmetry shield RP-8 column
(Hacettepe University, 2009)In this work, the proportion of organic modifier of the hydro-organic mobile phase was optimized in order to separate twelve compounds namely sulfaguanidine, sulfanilamide, sulfadiazine, sulfathiazole, sulfamethazine, ... -
Characterization of boron doped Cobalt/Zinc acetate composite fibers
(Hacettepe University, 2009)PVA/cobalt acetate/zinc acetate doped with boron composite fibers were prepared by electrospinning technique. Electrospinning was performed by putting solutions at different applied voltage in a range from 13 to 18 kV. The ... -
Nanofibers by electrospinning of nylon 6 doped with boron
(Hacettepe University, 2009)In this study, Nylon 6 was successfully cross-linked with boron using formic acid as solution. Electrospinning process was performed by putting hybrid nylon 6/boric acid solutions at different applied voltage in a range ... -
Electrochemical corrosion properties of metal alloys used in orthopaedic implants
(2009)This study concerns an investigation of the corrosion behavior of 316 stainless steel, CoCrMo and Ti6Al4V alloys in simulated body conditions (ringer lactate) at 37 °C by the use of Tafel plots, mixed potential and ... -
Solvent effects on pKa values of some substituted sulfonamides in acetonitrile-water binary mixtures by the UV-spectroscopy method
(2009)The examination of the dissociation constants of sulfonamides is essential in drug-design studies and in explaining the biopharmaceutical properties of substances. The dissociation constants of ten common human and veterinary ... -
Determination of pKa values of some auxins in methanol-water mixtures by reversed phase liquid chromatography and potentiometric methods
(Sociedade Brasileira de Quimica, 2009)Os hormônios das plantas são de vital importância para o seu funcionamento normal. As auxinas são uma classe de fito-hormônios envolvidas em muitos aspectos do crescimento. Os ácidos indol-3-acético (IAA), indol-3-pirúvico ... -
Determination of protonation constants of some tetracycline antibiotics by potentiometry and LC methods in water and acetonitrile-water binary mixtures
(2009)Uma estimativa acurada das constantes de dissociação de antibióticos tetraciclina em misturas binárias acetonitrila-água é muito importante para muitas técnicas de separação, como cromatografia líquida e eletroforese capilar ... -
Fabrication and characterization of boron doped Ni/Zn acetate nanofibers
(2009)This study is related to the preparation of boron doped Nickel/Zinc metal fibers prepared by the use of electrospinning technique. The originality of this study is the addition of boron to metal acetates. The addition of ... -
Electrochemical investigation of Zinc(II)-furdap amide complex in DMSO medium
(2009)The electrochemical behavior of Zinc(II)-furdap amide complex has been investigated by the use of several electrochemical methods in DMSO on platinum electrode. Both the ligand and the complex gave one electron transfer ... -
Coal an impure fuel source: Radiation effects of coal-fired power plants in Turkey
(Hacettepe Üniversitesi, 2010)Turkish coal is generally poor quality and the levels of chemical and radiological toxic trace elements in it are higher with respect to mean values of activity concentrations given in United Nations Scientific Committee ... -
Attitudes, self-efficacy and science processing skills of teaching certificate master's program (OFMAE) students
(2010)Problem Statement: The present research investigated attitudes toward science teaching, science teaching self-efficacy, and science processing skills of 77 students attending a teaching certificate master's program on ... -
Determination of dissociation constants of folinic acid (leucovorin), 5-fluorouracil, and irinotecan in hydro-organic media by a spectrophotometry method
(2010)In this study, a multiwavelength spectrophotometry method was used for the determination of the dissociation constants of drugs used for treatment of colorectal cancer, folinic acid (leucovorin), 5-fluorouracil, and ... -
Synthesis and biological activity of new cycloalkylthiophene-Schiff bases and their Cr(III) and Zn(II) complexes
(Birkhauser Boston, 2010)A series of some novel Ethyl 2-((1-hydroxynaphthalen-2-yl)methyleneamino)- 5,6-dihydro-4H-cyclopenta[b]thiopehene-3-carboxylate, Ethyl 2-((1- hydroxynaphthalen- 2-yl)methyleneamino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3- ... -
Determination of pKa values of some sulfonamides by LC and LC-PDA methods in acetonitrile-water binary mixtures
(2010)As constantes de dissociação de sete sulfonamidas antibióticas, sulfadiazina, sulfatiazol, sulfamerazina, sulfametazina, sulfamonometoxina, sulfadoxina e sulfametoxazol, foram determinadas em diferentes misturas binárias ... -
Fabrication and characterization of boron supported YBCO superconductive nanofibers by electrospinning
(2010)This study is related to the preparation of boron supported YBa2Cu3O7 (YBCO) superconducting material. The first step was the preparation of a composite formed by mixing yttrium, barium, and copper acetates with polyvinyl ... -
Diaquabis(2-bromobenzoato-κO)bis(N,N diethylnicotinamide- κN1)cobalt(II)
(2010)In the mononuclear title compound, [Co(C7H4BrO 2)2(C10H14N2O) 2(H2O)2], the CoII ion is located on a crystallographic inversion center. The asymmetric unit is completed by one 2-bromobenzoate anion, one diethylnicotinamide ... -
4-[2-(2,2-Dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)hydrazin-1-yl] benzo-nitrile
(2010)In the title compound, C 13H 11N 3O 4, the dioxane ring adopts an envelope conformation with the C atom bonded to the dimethyl group in the flap position [deviation = 0.613 (1) Å]. The nitrile group and the attached benzene ...
