Güncel Gönderiler: Makale Koleksiyonu
Toplam kayıt 88, listelenen: 41-60
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Spectrophotometric determination of the acidity dissociation constants of symmetric Schiff base derivatives
(Gazi University Eti Mahallesi, 2014)In this study, the acidity constants of series symmetric Schiff base derivatives have been determined using the UV-visible spectrophotometric method at a temperature of 25(±0.1) °C. The deprotonated acidity constants (pKa) ... -
Rapid direct spectrophotometric determination of zirconium(IV) in alloys with 2,2/,3,4-tetrahydroxy-3/-sulpho-5/-carboxyazobenzene reagent
(2011)In this study, 2, 2', 3, 4-tetrahydroxy-3'-sulpho-5'-carboxyazobenzene (tetrahydroxyazon SC) has been synthesized for the first time and used for direct spectrophotometric determination of zirconium(IV). Tetrahydroxyazon ... -
Antimicrobial, genotoxic and acute toxic effects of newly synthesized N-Pyridine schiff base derivatives
(2013)Nine N-pyridine Schiff bases (1-9) that were synthesized by reacting different ortho-, meta- and ortho-metasubstituted salicylaldehyde and 3,5-substituted aminopyridine were evaluated for their antimicrobial activity. The ... -
3-[(5-Chloro-2-hydroxybenzylidene)amino]-2-sulfanylidene-1, 3-thiazolidin-4-one
(2013)In the title compound, C10H7ClN2O2S2, the mean plane of the thioxothiazolidine ring [maximum deviation = 0.032 (2) Å] is inclined to the benzene ring by 12.25 (4)°. There is a strong intramolecular O - H...N hydrogen bond ... -
Synthesis of some alkylaminothiophene derivatives from 3,4-dibromothiophene and their theoretical calculations
(Elsevier Ltd, 2019)In this study, the copper catalyzed amination reactions of 3,4-dibromothiophene with some primary, cyclic and acyclic secondary amines were investigated to prepare novel electron rich-thiophenes which are expected to be ... -
Reaktif organobentonit katkıların sert poliüretan köpüğün bazı performans özellikleri üzerine etkisi
(Gazi Universitesi Muhendislik-Mimarlik, 2017)Bu çalışmada; bentonit, amin ve hidroksil fonksiyonelliğine sahip bileşikler ile modifiye edilmiş ve elde edilen organobentonitler sert poliüretan köpük nanokompozit (SPKN) sentezinde katkı olarak kullanılmışlardır. ... -
Metal chelate based site recognition of ceruloplasmin using molecularly imprinted polymer/cryogel system
(Taylor and Francis Inc., 2019)In the present study, N-Acetylneuraminic acid (NANA)-imprinted poly(2-hydroxyethyl methacrylate-N-methacryloyl-(L)-histidin-Cu(II)) p(HEMA-(MAH) 2 -Cu(II)) has been synthesized by radical polymerization for site recognition ... -
Validated UV-Vis Spectrophotometric Method for the Determination of Copper using 2,3,4,6/-Tetrahydroxy-3/-Sulfoazobenzene in Real Samples
(Chemical Society of Pakistan, 2018)A selective and sensitive spectrophotometric method has been proposed for the determination of copper by forming red-brown chelate at pH 3.5 (3-4) with 2,3,4,6/-tetrahydroxy-3/-sulfoazobenzene (THSA). Molar absorptivity ... -
Egg shell powder added rigid polyurethane foams: The investigation of their thermal conductivity, compressive strength and fire behaviors [Yumurta Kabuğu Tozu Katkılanmış Sert Poliüretan Köpükler: Termal İletkenlik, Basma Mukavemeti ve Yanma Davranışlarının İncelenmesi]
(Turk Isı Bilimi ve Teknigi Dernegi, 2018)In this study, rigid polyurethane foam composites (SPKK's) containing egg shell powder (YKT) with different ratio were synthesized. YKT was characterized by using X-ray difractometer (XRD), X-ray fluorescence spectrometer ... -
4-Methyl-N-(4-methylphenylsulfonyl)-N-phenylbenzenesulfonamide
(2014)The whole molecule of the title compound, C20H 19NO4S2, is generated by twofold rotational symmetry. The N atom is located on the twofold rotation axis and has a trigonal-planar geometry. It is bonded by two S atoms of two ... -
Separation of catechins and methylxanthines in tea samples by capillary electrochromatography
(2009)In this paper, the simultaneous separation of several polyphenols such as (+)-catechin, (-)-epicatechin, (-)-epigallocatechin, theophylline, caffeine in green and black teas by capillary electrochromatography (CEC) was ... -
The synthesis, characterization and structural analysis of a Co(III) complex of 1,10-phenanthroline and perfluorosebacic acid, [Co(HL)(phen) 2(H2O)]L·H2O
(Verlag der Zeitschrift fur Naturforschung, 2006)The hexacoordinated mononuclear Co(III) complex 1, [Co(HL)(phen) 2(H2O)]L·H2O, with the mixed ligands (H2L = HO2C(CF2)8CO2H and 1,10-phenantroline) has been synthesized and characterized by elemental analysis, IR and UV/vis ... -
Selective solid-phase extraction of Cd(II) using double imprinting strategy
(2010)Molecular imprinting technology is a strategy for producing chemically selective binding sites, which recognize a particular molecule, in a macroporous polymer matrix. Molecular recognition-based separation techniques have ... -
Evaluation of polymer-supported rhodium catalysts in 1-octene hydroformylation in supercritical carbon dioxide
(American Chemical Society, 2003)Supercritical CO2 has been used as a benign solvent in the hydroformylation of 1-octene using a Rh-based catalyst. The catalyst is attached to a polymer backbone that has fluoroacrylate branches that make it soluble in ... -
Reverse atom transfer radical polymerization of stearyl methacrylate using 2,2'-azobisisobutyronitrile as the initiator
(2002)The living/controlled radical polymerization of stearyl methacrylate was carried out with a conventional radical initiator (2,2'-azobisisobutyronitrile) in N,N-dimethylformamide in the presence of a 2,2'-bipyridine complex ... -
Structural studies of water-soluble ß-brominated manganese porphyrins: Stabilities of MnTDCSPPBr8 and MnTSPPBr8 as homogeneous and supported reagents toward hydrogen peroxide and sodium hypochlorite
(2001)This article describes the structural stabilities of [2,3,7,8,12,13,17,18-octabromo-5,10,15,20-tetrakis(2,6-dichloro-3- sulfonatophenyl)porphinato]manganese(III) X (where X = H2O and/or OH-, depending on pH) (MnTDCSPPBr8) ... -
Protonation, tautomerization and valence tautomerization of selected imidazo[4,5-f]quinolines. A theoretical study of gas and liquid basicity of imidazo[4,5-f]quinolines
(1993)The theoretical calculations on imidazo[4,5-f] quinolines has shown that the first protonation takes place at the pyridine, nitrogen atom rather than at the imidazole nitrogen atom. The preferred tautomeric form was found ... -
Latex supported manganese (III) porphyrin catalysts for oxidations of alkenes by hydrogen peroxide and tert-butyl hydroperoxide in the aqueous medium
(1996)Cationic polymer latexes were prepared by emulsion copolymerization of vinylbenzyl chloride and divinylbenzene followed by quaternization with trimethylamine and used as catalyst supports for 5,10,15,20-tetrakis(2, ... -
Performance of dye-affinity beads for aluminium removal in magnetically stabilized fluidized bed
(2004)Background: Aluminum has recently been recognized as a causative agent in dialysis encephalopathy, osteodystrophy, and microcytic anemia occurring in patients with chronic renal failure who undergo long-term hemodialysis. ... -
Photocatalytic oxidation of nitrobenzene and phenylamine: Pathways and kinetics
(John Wiley & Sons Inc, 2007)The oxidation of nitrobenzene and phenylamine has been carried out by heterogeneous photocatalysis in aqueous suspensions of commercial TiO2. The photoreactivity results indicate that two reaction pathways occur in parallel ...
