Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 678, listelenen: 341-360
-
Iron speciation by solid phase extraction and flame atomic absorption spectrometry using N,N'-bis-(2-hydroxy-5-bromobenzyl)-2-hydroxy-1,3-diiminopropane
(Springer Wien, 2007)A new Schiff base, N,N'-bis-(2-hydroxy-5-bromobenzyl)-2-hydroxy-1,3-diiminopropane, has been synthesized for the very sensitive determination of iron(III) and iron(II) in natural water samples. It enabled a very selective ... -
Incorporation of an allene unit into 1,4-dihydronaphthalene: generation of 1,2-benzo-1,4,5-cycloheptatriene and its dimerization
(Pergamon-Elsevier Science Ltd, 2007)1-Bromo-1-fluoro-[1a,2,7,7a]-tetrahydro-1H-cyclopropa[b]naphthalene (19) has been prepared by the addition of bromolluoro-carbene to 1,4-dihydronaphthalene (18). Treatment of a solution of 19 in dry ether with MeLi afforded ... -
Simultaneous observation of reagent consumption and product formation with the kinetics of benzaldehyde and aniline reaction in FTIR liquid cell
(Elsevier Science Bv, 2007)Monitoring of a reaction in FrIR liquid cell has complex spectral futures due to the presence of solvent, unreacted reagents; acid catalysis and other additives. The current work was performed to study the kinetics of the ... -
Synthesis, complexation and antifungal, antibacterial activity studies of a new macrocyclic Schiff base
(Hetero Corporation, 2006)A new macrocyclic ligand, L was synthesized using the high dilution condition with condensation of triethylene glycol diamine and terephtalaldehyde in ethanol. The obtained product, L was identified by FTIR, H-1-NMR, ... -
A rapid synthesis of sodium titanium phosphate, NaTi2(PO4)(3) by using microwave energy
(Elsevier Science Sa, 2006)In this study, sodium titanium phosphate, NaTi2(PO4)(3) was synthesized in a pure form by using microwave energy. The NaTi2(PO4)(3) was obtained by mixing the initial reactants of TiO2, (NH4)(2)HPO4 and NaH2PO4-2H(2)O with ... -
Isolation and biological activity of new and known diterpenoids from Sideritis strieta Boiss. & Heldr.
(MDPI, 2006)Nine known and one new ent-kaurene diterpenoid were isolated from the acetone extract of Sideritis stricta Boiss & Heldr. The new compound, identified as ent-1 beta-hydroxy-7 alpha-acetyl-15 beta,16 beta-epoxykaurane (1) ... -
Study of the structure and refractive parameters of diethylamine and triethylamine
(Elsevier Sci Ltd, 2006)The refractive index (n) and thermal coefficient of the refractive index (dn/dt) are measured at four wavelengths for the diethylamine and triethylamine. The measurements are carried out using the Bellingham + Stanley model ... -
Variations of peroxidase activity among Salvia species
(Elsevier Sci Ltd, 2007)Peroxidase was partially purified from Salvia species such as Salvia tomentosa Miller, Salvia virgata Jacq and Salvia viridis L. using solid (NH4)(2)SO4 precipitation and dialysis methods. We investigated the effect of ... -
Synthesis, characterization, crystal structure and biological activity of the cobalt(IV) complex of 2,6-diacetylpyridine dioxime: [Co(dapdo)(2)]
(Springer, 2007)The cobalt(IV) complex of 2,6-diacetylpyridine dioxime (dapdoH(2)) was prepared and characterized by X-ray diffraction, elemental analysis and FT-IR. The titled complex was found to crystallize in the orthorhombic space ... -
New coumarin derivatives as carbonic anhydrase inhibitors
(Taylor & Francis Ltd, 2014)In the current study, a series of 4-chloromethyl-7-hydroxy-coumarin derivatives containing imidazolium, benzimidazolium, bisbenzimidazolium and quaternary ammonium salts were synthesized, characterized and the inhibition ... -
Dye sensitized artificial photosynthesis in the gas phase over thin and thick TiO2 films under UV and visible light irradiation
(Elsevier Science Bv, 2007)Perylene diimide based organic sensitizers capable of electron generation under illumination were used to initiate gas phase photo reduction reactions on TiO2 thin and thick film surfaces. For comparison [Ru(Bpy)(3)](2+) ... -
A new investigation with the salting-out effect on emulsifier-free emulsion polymerization of methyl methacrylate
(John Wiley & Sons Inc, 2007)The effects of the various salts onto the emulsifier-free emulsion polymerization of methyl methacrylate (MMA) were investigated. It was found that the kind and amount of the salts were very effective on the polymerization ... -
On-line solid phase extraction of nickel, copper, and cadmium using a newly synthesized polyamine silica gel-loaded mini-column for flame atomic absorption spectrometric determination
(Perkin-Elmer Corp, 2014)In this study, polyamine (pentaethylene hexamine) functionalized silica gel (PA-SG) was prepared as a novel sorbent material for on-line preconcentration of Cd(II), Cu(II), and Ni(II) from complex matrices. The PA-SG was ... -
Effects of some antibiotics on paraoxonase from human serum in vitro and from mouse serum and liver in vivo
(Pharmaceutical Soc Japan, 2006)Paraoxonase (PON1, EC 3.1.8.1) is an esterase protein which plays multifunctional role in metabolism. Therefore, in this study the effects of commonly used antibiotics, namely sodium ampicillin, ciprofloxacin, rifamycin ... -
An evaluation of cytosolic erythrocyte carbonic anhydrase and catalase in carcinoma patients: An elevation of carbonic anhydrase activity
(Pergamon-Elsevier Science Ltd, 2006)Objectives: The antioxidant enzyme catalase and the CO2/HCO3- exchange enzyme carbonic anhydrase are both present in significant amounts in the cytosol of erythrocytes. The aim of the present study was to investigate whether ... -
Synthesis and tyrosinase inhibitory properties of novel isoquinoline urea/thiourea derivatives
(Informa Healthcare, 2014)A new series of isoquinoline urea/thiourea derivatives (1-11) were synthesized, and their inhibitory effects on tyrosinase were evaluated. Isoquinoline urea/thiourea derivatives were obtained as a result of the reaction ... -
The effects of bronchodilator drugs and antibiotics used for respiratory infection on human erythrocyte carbonic anhydrase I and II isozymes
(Taylor & Francis Ltd, 2015)Carbonic anhydrase (CA) is an enzyme which plays role/roles in various homeostatic mechanisms, such as the acid-base balance and electrolyte secretion in various tissues. This study aimed to determine and to compare possible ... -
Formation of Langmuir-Blodgett thin film of a novel N-dodecylphthalimide
(Elsevier Science Bv,, 2006)The aim of this work is to investigate the Langmuir-Blodgett (LB) thin film preparation of a novel N-dodecylphthalimide (NDP). Langmuir properties of this new molecule are studied at the air-water interface recording ... -
A furostanol saponin and phytoecdysteroid from roots of Helleborus orientalis
(Springer, 2007)A furostanol saponin mixture and a known phytoecdysteroid were isolated from the roots of Helleborus orientalis Lam. Their structures were established as 26-[(beta-D-glucopyranosyl)oxy]-22 alpha-hidroxyfurosta-5,25(27)-dien-1 ... -
Sulfonamide inhibition study of the beta-class carbonic anhydrase from the caries producing pathogen streptococcus mutans
(Pergamon-Elsevier Science Ltd, 2015)Streptococcus mutans, the oral pathogenic bacterium provoking dental caries formation, encodes for a beta-class carbonic anhydrase (CA, EC 4.2.1.1), SmuCA. This enzyme was cloned, characterized and investigated for its ...
