Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 678, listelenen: 561-580
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Fabrication of pmma/arachidic acid lb films
(Natl Inst Optoelectronics, 2010)Fabrication of the polymethyl methacrylate (PMMA) molecules onto solid substrates in order to form Langmuir-Blodgett (LB) thin films have been studied in this paper. As a first step to determine the optimum conditions for ... -
Synthesis, complexation, and biological activity studies of 4-aminomethyl-7,8-dihydroxy coumarines and their crown ether derivatives
(Wiley-Blackwell, 2010)The article focuses synthesis of novel 4-aminomethyl-7,8-dihydroxy coumarins and their crown ether derivatives. The purified novel coumarins and their crown ether derivatives were identified by (1)H NMR, (13)C NMR, mass ... -
Adsorption of cationic polyacrylamide (C-PAM) on expanded perlite
(Elsevier Science Bv, 2010)The adsorption of cationic polyacrylamide (C-PAM) onto expanded perlite (EP) from aqueous solutions was investigated as a function of some parameters such as pH, ionic strength, and temperature. The adsorption of C-PAM was ... -
Differential effects of some antibiotics on paraoxonase enzyme activity on human hepatoma cells (hepg2) in vitro
(Taylor & Francis Ltd, 2010)Serum paraoxonase (aryldialkylphosphatase, EC 3.1.8.1., PON1) is an esterase protein synthesised by the liver and released into the serum, where it is associated with HDL lipoproteins. In this study, we have determined the ... -
Synthesis, characterization and thermal properties of cobalt(ıı), nickel(ıı) and copper(ıı) complexes of 2,6-bis(3,4,5-trimethyl-n-pyrazolyl)pyridine): The crystal structure of [co(btmpp)(h2o)(2)(no3)]no3
(Springer, 2010)Co(II), Ni(II) and Cu(II) nitrate complexes with btmpp, namely ([Co(btmpp)(H2O)(2)(NO3)]NO3 (1), [Ni(btmpp)(H2O)(NO3)]NO3 (2) and [Cu(btmpp)(MeOH)(NO3)]NO3 (3), where btmpp = 2,6-bis(3,4,5-trimethyl-N-pyrazolyl)pyridine), ... -
Brilliant yellow dye adsorption onto sepiolite using a full factorial design
(Elsevier Science Bv, 2010)Batch adsorption experiments were carried out in order to evaluate the maximum adsorption conditions of the anionic dye Brilliant Yellow (BY) from aqueous solutions on sepiolite using a 2(3) full factorial design The three ... -
Emulsifier-free emulsion polymerization of methyl methacrylate containing hydrophilic magnetite nanoparticles
(Polymer Soc Korea, 2010)Emulsifier-free emulsion polymerization of methyl methacrylate was carried out in the presence of hydrophilic magnetite nanoparticles using a persulfate initiator. Before the magnetic nanoparticles were placed into the ... -
Copper and ıron determination with [n,n '-bis(salicylidene)-2,2 '-dimethyl-1,3-propanediaminato] in edible oils without digestion
(Wiley, 2010)A new method for the determination of copper(II) and iron(III) in liquid edible oils which does not require a digestion step was developed. The suggested method involves extraction of metals with [N,N'-bis(salicylidene)- ... -
A simple way to synthesize superparamagnetic iron oxide nanoparticles in air atmosphere: Iron ion concentration effect
(IEEE-Inst Electrical Electronics Engineers Inc, 2010)We have synthesized iron oxide nanoparticles in air atmosphere by coprecipitation. The ratio of [Fe(+2)][Fe(+3)] was fixed at 2/3. The total amount of iron ions in the solution was varied from 250 mmol to 12.5 mmol. X-ray ... -
Rheological and wall slip properties of kaolinite-silicon oil pastes during extrusion
(Korean Assoc Crystal Growth, 2010)The rheological behavior of pastes was characterized by employing capillary flow. The wall slip properties of pastes are very significant in the extrusion process. All pastes were found to exhibit non-Newtonian, pseudoplastic, ... -
Cr-submanifolds of a lorentzian para-sasakian manifold with a semi-symmetric metric connection
(Hacettepe Unıv, 2010)We study CR-submanifolds of a Lorentzian para-Sasakian manifold endowed with a semi-symmetric metric connection. Moreover, we obtain integrability conditions of the distributions on CR-submanifolds. -
Antioxidant, phenolic and protein contents of some medicinal plants
(Academıc Journals, 2010)In this study, the antioxidant contents such as alpha-tocopherol, beta-carotene, ferulic acid and gallic acid and, total phenolic and proteine contents of some medicinal plants were determined by High Performance Liquid ... -
Ring-opening mechanism of lithium bromosilacyclopropylidenoids to silaallenes
(Amer Chemıcal Soc, 2010)Density functional theory and ab initio quantum mechanical calculations elucidated the ring opening reactions of 1 bromo 1 lithiosilirane (3) and 2 bromo 2 lithiosilirane (4) to 2 silallene (6) and 1 silaallene (7) ... -
Determination of trace heavy metals in soil and sediments by atomic spectrometry following preconcentration with schiff bases on amberlite xad-4
(Elsevier Science Bv, 2009)A matrix separation and analyte preconcentration system using Amberlite XAD copolymer resins functionalized by Schiff base reactions coupled with atomic spectrometry has been developed. Three different functionalized ... -
Adsorption kinetics of maxilon yellow 4gl and maxilon red grl dyes on kaolinite
(Elsevier Science Bv, 2009)Kaolinite, a low-costly material, is the most abundant phyllosilicate mineral in highly weathered soils. in this work, the adsorption kinetics of maxilon yellow 4GL (MY 4GL) and maxilon red GRL (MR GRL) dyes on kaolinite ... -
Poly(vinyl alcohol) nanocomposites with sepiolite and heat-treated sepiolites
(John Wiley & Sons Inc, 2009)Poly(vinyl alcohol) (PVA) nanocomposites with pristine sepiolite and heat-treated (HT) sepiolites were prepared by the method of solution dispersion. The measurements of XRD, FTIR, TEM, and AFM were used for the characterization ... -
Preconcentration and determination of trace metals by flow injection micelle-mediated extraction using flame atomic absorption spectrometry
(Elsevier Science Bv, 2009)Micelle-mediated extraction/preconcentration is incorporated on-line into a flow injection system used to determine low levels of Cd(II), Co(II), Cu(II), Mn(II), Ni(II). Pb(II) and Zn(II) present in various samples. The ... -
Experimental and computational investigations of a cadmium(ıı) mononuclear complex with 2,6-bis(3,5-dimethyl-n-pyrazolyl)pyridine (bdmpp) and selenocyanate as ligands
(Versita, 2009)A new cadmium (II) complex, [Cd(bdmpp)(SeCN)(2) (H(2)O)] (1) (where bdmpp = 2,6-bis(3,5-dimethyl-N-pyrazolyl)pyridine), has been synthesized and characterized by elemental and spectral (IR, (1)H-NMR and (13)C-NMR, UV-Vis) ... -
Endo- and exo-configured cyclopropylidenes ıncorporated into the norbornadiene skeleton: generation, rearrangement to allenes, and the effect of remote substituents on carbene stability
(Amer Chemical Soc, 2009)For the synthesis of endo-configured cyclopropylidenes annelated to benzonorbornadiene, first the exo-bridge hydrogen in benzonorbornadiene was blocked with ethyl, bromine, and methoxy groups. All efforts to add dichloro-, ... -
Characterization of novel 1,3-bis-(p-iminobenzoic acid) indane langmuir-blodgett (lb) films, with and without zn2+ ions
(Natl Inst Optoelectronics, 2009)Y-type 1,3-bis-(p-iminobenzoic acid) indane thin films with and without Zn2+ ions were grown by a LB technique to investigate the influence of the Zn2+ ions on their electrical properties. In this work, 1,3-bis-(p-iminobenzoic ...
