Güncel Gönderiler: Kimya Bölümü
Toplam kayıt 724, listelenen: 581-600
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Ent-kaurane diterpenoids isolated from Sideritis congesta
(Elsevier Science Bv, 2011)A new ent-kaurane diterpenoid, together with eight known ent-kauranes, were isolated from the petroleum ether and acetone extracts of the whole plant of Sideritis congesta P. H. Davis & Hub.-Mor. and their structures were ... -
Voltammetric determination of boron using cobalt phthalocyanine modified carbon paste electrode
(ESG, 2011)An alternative mercury-free voltammetric method based on the complexation of boron with alizarin red S (ARS) for the determination of boron using cobalt phthalocyanine modified carbon paste electrode (CoPcMCPE) was described. ... -
Evaluation of new chalcone derivatives as polyphenol oxidase inhibitors
(Pergamon-Elsevier Science Ltd, 2011)A newly series of 4-(phenylurenyl) chalcone (4a-j) and 4'-(phenylurenyl/thiourenyl)chalcone (9a-l) derivatives were synthesized and their inhibitory effects on the diphenolase activity of banana tyrosinase were evaluated. ... -
Thin film characterization and vapor sensing properties of a novel perylenediimide material
(Elsevier Science, 2011)A novel N,N'-(glycine tert-butylester)-3,4,9,10-perylenediimide was chosen for the study of Langmuir-Blodgett (LB) thin film characterization and the sensing properties against selected volatile organic vapors. Different ... -
Determination of gallium at trace levels using a spectrofluorimetric method in synthetic u-ga and ga-as solutions
(Pergamon-Elsevier Science Ltd, 2010)A simple, easy to use and selective spectrofluorimetric method for the determination of trace levels of gallium has been developed. A new Schiff base, N-o-vanillidine-2-amino-p-cresol (OVAC) was synthesized and its ... -
Two non-linear azide containing heteronuclear complexes: crystal structure and thermal decomposition
(Springer, 2010)Bis-N,N'(salicylidene)-2,2'-dimethyl-1,3-propanediamine (LDMH2) has a high tendency to form polynuclear complexes. Two trinuclear complexes were obtained using this ligand and azide ions; (CuLDM)(2) center dot A Mn(N-3)(2) ... -
Saccharomyces cerevisiae beta-carbonic anhydrase: ınhibition and activation studies
(Bentham Science Publ Ltd, 2010)The beta-carbonic anhydrase from Saccharomyces cerevisiae (CA, EC 4.2.1.1), scCA, which is encoded by the Nce103 gene, is an effective catalyst for CO2 hydration to bicarbonate and protons, with a k(cat) of 9.4 x 10(5) ... -
Chloro-bridged dimeric cadmium(II)-Isothiocyanate complex with a tridentate NNN type ligand: Synthesis, X-ray structure, thermal analysis
(Springer, 2010)The dinuclear cadmium(II) complex with 2,6-bis(3,4,5-trimethyl-N-pyrazolyl)pyridine (btmpp) has been synthesized, and characterized by single crystal X-ray diffraction, IR, UV-Vis and TGA-DTA methods. Cd atoms are located ... -
Removal of reactive blue 221 by kaolinite from aqueous solutions
(Amer Chemical Soc, 2010)The adsorption behavior of reactive blue 221 (RB221) on kaolinite was investigated by batch tests. The experiments were performed by employing a spectrophotometer to measure the concentration of RB221 before and after ... -
Poly(vinyl chloride)/kaolinite nanocomposites: characterization and thermal and optical properties
(Amer Chemical Soc, 2010)Nanocomposites of poly(vinyl chloride) (PVC) have been prepared by solution intercalation method using both natural and modified kaolinites. Kaolinite was modified with dimethyl sulfoxide (DMSO) to expand the interlayer ... -
Kinetic analysis of reactive blue 221 adsorption on kaolinite
(Elsevier Science Bv, 2010)The use of cheap, efficient and ecofriendly adsorbent has been studied as an alternative source of activated carbon for the removal of dyes from wastewater. This study has investigated the potential use of kaolinite as ... -
Mutation of phe91 to asn in human carbonic anhydrase ı unexpectedly enhanced both catalytic activity and affinity for sulfonamide inhibitors
(Pergamon-Elsevier Science Ltd, 2010)Site-directed mutagenesis has been used to change one amino acid residue considered non essential (Phe91Asn) to catalysis in carbonic anhydrase (CA, EC 4.2.1.1) isozyme I (hCA I), but which is near the substrate binding ... -
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), ... -
Paraoxonase 1-bound magnetic nanoparticles: Preparation and characterizations
(Amer Scientific Publishers, 2010)This is most probably the first time that covalently binding of Human serum paraoxonase 1 (PON1) to superparamagnetic magnetite nanoparticles via carbodiimide activation was investigated and presented in this study. PON1 ... -
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 ...
