Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 678, listelenen: 541-560
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Effect of ammonium sulphate on the activities of paraoxonase isoenzymes Q and R
(Asian Journal of Chemistry, 2011)Paraoxonase isoenzymes exists in 2 polymorphic forms, Q (glutamine) or R (arginine) at codon 192. The Q isoform has a higher activity for hydrolyze of diazoxon, sarin and soman; whereas the R isoform has a higher activity ... -
Superparamagnetic latex synthesized by a new route of emulsifier-free emulsion polymerization
(Wiley-Blackwell, 2011)The aim of this study was to design polymeric nanospheres containing magnetic nanoparticle which could display superparamagnetic behavior and thus find application in allied fields. First magnetite nanoparticles were ... -
Carbonic anhydrase inhibitors: purification and inhibition studies of pigeon (Columba livia var. domestica) red blood cell carbonic anhydrase with sulfonamides
(Informa Healthcare, 2011)A carbonic anhydrase (CA, EC 4.2.1.1) from red blood cells of pigeons (Columba livia var. domestica), clCA, was purified to homogeneity. Its kinetic parameters for the CO(2) hydration reaction were measured. With a k(cat)/K(m) ... -
Synthesis, metal ion complexation and computational studies of thio oxocrown ethers
(MDPI AG, 2011)The synthesis of some thio-oxocrown ether ligands, B1 (1,4-dithio-12-crown-4), B2 (1,7-dithio-12-crown-4), B3 (1,7-dithio-15-Crown-5), B4 (1,7-dithio-18-crown-6), B5 (1,10-dithio-18-crown-6), B6 (1,10-dithio-21-crown-7), ... -
The azoarcus group i intron ribozyme misfolds and is accelerated for refolding by atp-dependent rna chaperone proteins
(Amer Soc Biochemistry Molecular Biology Inc, 2011)Structured RNAs traverse complex energy landscapes that include valleys representing misfolded intermediates. In Neurospora crassa and Saccharomyces cerevisiae, efficient splicing of mitochondrial group I and II introns ... -
Optical characterization and organic vapor sensing application of perylendiimide Langmuir-Blodgett thin films
(NATL INST Optoelectronics, 2016)The Langmuir-Blodgett (LB) technique was employed to produce thin LB films using N,N'-(glycine tert-butylester)-3,4,9,10-perylenediimide (FY1) material on gold coated glass. The characteristics of the perylenediimide FY1 ... -
Detection of relative dimer and rotamer concentrations of diacetamide in different solvents by FT-IR spectroscopy and DFT calculations
(Elsevier Science Bv, 2011)The relative rotamer, dimer and tautomer concentrations of diacetamide have been studied by means of infrared spectroscopy, with the recorded spectra being analyzed employing results from density functional theory calculations. ... -
Solid state synthesis of calcium borohydroxyapatite
(Elsevier Science Bv, 2011)Calcium borohydroxyapatite was synthesized by the solid-state reaction of colemanite (Ca2B6O11 center dot 5H(2)O) and diamonium hydrogenphosphate ((NH4)(2)HPO4) at 1200 degrees C for 12 h. X-ray diffraction pattern showed ... -
Essential oil composition of twenty-two Stachys species (Mountain tea) and their biological activities
(Elsevier Science Bv, 2011)The essential oils from twenty-two different Stachys species were obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC-MS). Thirty-nine compounds, which accounted for 70.5-97.8% of the ... -
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) ... -
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 ...
