Browsing Makale Koleksiyonu by Issue Date
Now showing items 1-20 of 1058
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Some DC and AC Properties of Copper-Loaded Polypropylene Films
(1987)Thin film Cu-polypropylene-Cu sandwich structures are prepared by thermal vacuum deposition of these materials onto glass substrates. Polypropylene in some of the samples is also loaded with Cu of varying amount. ... -
High-field electrical conduction in thin films of polyethylene
(1987)The voltage-current characteristics of thin film metal-polyethylene-copper structures in which copper is used as a top electrode are studied. The samples made with thermally vacuum-evaporated polyethylene and having a top ... -
Catalysis of autoxidation of 2,6-di-tert-butylphenol in water by metallophthalocyanine tetrasulfonates bound to polyelectrolyte supports
(Scientific Technical Research Council Turkey, 1996)2,6-and 2,10-Ionenes and soluble poly(vinylbenzyl)trimethylammonium chloride polyelectrolytes were synthesized and used as catalyst supports for cobalt-, iron- and copper-phthalocyanine tetrasulfonates on the autoxidation ... -
Investigation of the structure and the properties of the potentially tautomeric 1,2-dihydro-5,7-dimethyl-6H-pyrrolo[3,4-d]pyridazine-1-ones in the gas and aqueous phases using semiempirical methods
(Elsevier Science BV, 1998)Potentially tautomeric 1,2-dihydro-5,7-dimethyl-6H-pyrrolo[3,4-d]pyridazine-1-ones and their fixed tautomeric forms have been studied, in order to predict their tautomeric equilibrium constants and pK(a) values, using ... -
Investigation of the structure and properties of the potentially tautomeric 5,7-dimethyl-6H-pyrrolo[3,4-d]pyridazines in the gas and aqueous phases using the AM1 and PM3/COSMO solvation method
(Elsevier Science BV, 1998)The potentially tautomeric 5.7-dimethyl-6H-pyrrolo[3,4-d]pyidazines 2H and 6H, and their fixed tautomeric forms were studied in order to predict the most stable form by the restricted Hartree-Foch approach using semiempirical ... -
Investigation of the structure of and the properties of the potentially tautomeric 1,2,3,4-tetrahydro-5,7-dimethyl-6H-pyrrolo[3,4-d]pyridazine-1,4-diones in the gaseous and aqueous phases using the AM1 semi-empirical method
(Elsevier Science BV, 1998)Potentially tautomeric 1,2,3,4-tetrahydro-5,7-dimethyl-6H-pyrrolo[3,4-d]pyridazine-1,4-diones and their fixed tautomeric forms have been studied in order to predict their tautomeric equilibrium constants and pK(a) values ... -
Hydrogen bonding and dimeric self-association of 2-pyrrolidinone: An ab initio study
(Kluwer Academic Publ, 1999)Ab initio calculations on the different associated structures of 2-pyrrolidinone with water and with itself were carried out using 3-21G and 6-31G(*) basis sets at the Hartree-Fock level, including electron correlation ... -
A study on the pyrazoles: tautomerism, conformation, acidity, and basicity by means of AM1 semiempirical method in the gas and aqueous solution
(Elsevier Science BV, 1999)A comprehensive theoretical study of some pyrazolones and their fixed model compounds is presented. The tautomeric equilibrium and acidity constants of these compounds have been investigated both in the gas and aqueous ... -
Removal of heavy metal ions from aquatic solutions by membrane chromatography
(Elsevier Science BV, 2000)Polyvinylalcohol membranes were prepared by a solvent casting technique. Metal-complexation ligand, i.e. monochlorotriazinyl-dye Cibacron Blue F3GA was then attached. These membranes with a high water content of 119%, and ... -
Prediction of the acidities of organic bases in aqueous solution using AM1 COSMO solvation model
(Elsevier Science BV, 2000)Potentially tautomeric pyrazole-3-ones were studied, in order to predict their tautomeric equilibrium constants and pK(a) values, using the semiempirical AM1 COSMO solvation model at the SCF level in aqueous solution. Syn ... -
Synthesis and adsorption properties of poly(2-hydroxyethylmethacrylate-co-methacrylamidophenylalanine) membranes for copper ions
(Elsevier Science BV, 2000)In the first step of this study, the metal complexing ligand, 2-methacrylamidophenylalanine (MAPA), was synthesized by using methacrylochloride and phenylalanine. The MAPA monomer was characterized by NMR. Then, ... -
Structural stabilities of sulfonated manganese tetramesitylporphyrin and its beta-brominated analogue toward NaOCl, H2O2 and (CH3)(3)COOH
(Elsevier Science BV, 2000)This article gives the degradation rate constants of meso-tetrakis(3,5-disulfonatomesityl)porphinatomanganese(III) X (where X = H2O and/or OH- depending on pH) (MnTMSP) and its beta-brominated analogue (MnTMSPBr8) toward ... -
Structural stabilities of water-soluble MnTDCSPP, MnTSPP, and supported analogues toward hydrogen peroxide and sodium hypochlorite
(Wiley-Blackwell, 2000)This article describes the structural stabilities of 5,10,15,20-tetrakis(2.6-dichloro-3-sulfonatophenyl)porphinatomanganese(III) X (X: OH-. H2O) (MnTDCSPP), 5,10,15,20-tetra(4-sulfonatophenyl)porphinatomanganese(III) X (X: ... -
Dönme ve öteleme hareketinin dual kuaternionlarla temsili
(2000)Üç boyutlu uzayda dönme ve öteleme hareketi yapan koordinat sistemlerinin hareketlerini tanımlamak için birçok yöntem geliştirilmiştir. Bu amaçla kullanılan kuaternionların diğer yöntemlerden daha basit ve kullanışlı bir ... -
Preparation of magnetic dye affinity adsorbent and its use in the removal of aluminium ions
(Vsp BV, 2001)Aluminium has recently been considered as a causative agent in dialysis encephalopathy, osteodystrophy, and anemia occuring in hemodialysis patients. The aim of this study is to prepare magnetic poly (2-hydroxyethylmethacrylate) ... -
Biosorption of cadmium(II), lead(II) and copper(II) with the filamentous fungus Phanerochaete chrysosporium
(Elsevier Sci LTD, 2001)The biosorption from artificial wastewaters of heavy metals (Cd(II), Pb(II) and Cu(II)) onto the dry fungal biomass of Phanerochaete chryosporium was studied in the concentration range of 5-500 mg 1(-1). The maximum ... -
Heavy metal separation capacity of a porous methacrylamidophenylalanine containing membrane based on a polyhydroxyethyl methacrylate matrix
(Marcel Dekker Inc, 2001)The abilities of various sorbent materials for heavy metal removal have been reported in the literature. We have developed a novel approach to obtain high metal-sorption capacity utilizing a membrane containing ... -
Zinc ion-promoted adsorption of lysozyme to Cibacron Blue F3GA-attached microporous polyamide hollow-fiber membranes
(Elsevier Science BV, 2001)Dye-affinity and metal chelate affinity adsorption are increasingly used for protein separation. Synthetic hollow fiber membranes have advantages as support matrices in comparison to conventional bead supports because they ... -
Spectroscopic determination of acid dissociation constants of some imidazole derivatives
(American Chemical Society, 2001)The acid dissociation constants, pK(a), of eight biologically active imidazole derivatives were determined using a spectroscopic technique. Using the obtained acid dissociation constants, attempts were made to elucidate ...
