Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 678, listelenen: 481-500
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In vitro effects of estrogen and progesterone containing drugs on human erythrocyte carbonic anhydrase I and II isozymes in women smokers and nonsmokers
(Elsevier Taiwan, 2015)Background: Carbonic anhydrases (CAs), a group of metalloenzymes, are involved in numerous physiological and pathological processes such as acid base balance, gluconeogenesis, lipogenesis, ureagenesis, electrolyte secretion ... -
Kinetics and mechanism of removal of methylene blue by adsorption onto perlite
(Elsevier Science Bv, 2004)The kinetics and mechanism of methylene blue adsorption on perlite have been studied. The effects of various experimental parameters, such as initial dye concentration, temperature and pH on the adsorption rate were ... -
In vitro inhibition effects of some new sulfonamide inhibitors on human carbonic anhydrase I and II
(Taylor & Francis Ltd, 2004)A new series of aromatic and heterocyclic sulfonamides, including six new derivatives, 2-(3-cyclohexene-1-carbamido)-1,3,4-thiadiazole-5-sulfonamide (CCTS), 4-(3-cyclohexene-1-carbamido) methyl-benzenesulfonamide (CCBS), ... -
Polarizabilities and dipole moments of benzaldehyde, benzoic acid and oxalic acid in polar and nonpolar solvents
(Elsevier Science Bv, 2004)The purpose of this report is to calculate the orientation polarizability of benzaldehyde, benzoic acid and oxalic acid in polar and nonpolar solvents. The calculations are based on the knowledge of permanent dipole moment ... -
Complexation and mutagenicity potential studies with N,N '-bis(2-hydroxynaphthalin-1-carbaldehydene)-1,2-bis-(P-aminophenoxy)ethane and a novel oxovanadium(IV) complex
(Taylor & Francis Ltd, 2004)A new oxovanadium(IV) complex of the Schiff base obtained by condensation of 1,2-bis(p-aminophenoxy)ethane with 2-hydroxynaphthalin-1-carbaldehyde was synthesized. The complex was characterized by elemental analysis, ... -
In vitro inhibition effects of some coumarin derivatives on human erythrocytes glucose-6-phosphate dehydrogenase activities
(Taylor & Francıs Ltd, 2014)Inhibitory effects of some synthesized dihydroxycoumarin compounds on purified G6PD were investigated. For this purpose, initially human erythrocyte G6PD was purified 7069-fold in a yield of 33.6% by using ammonium sulfate ... -
Study of the thermal decompositions on N,N-dialkyl-N '-benzoylthiourea complexes of Cu(II), Ni(II), Pd(II), Pt(II), Cd(II), Ru(III) and Fe(III)
(Kluwer Academic Publ, 1999)The thermal decompositions of the complexes of N,N-dialkyl-N'-benzoylthioureas with Cu(II), Ni(II), Pd(II), Pt(II), Cd(II), Ru(III) and Fe(III) were studied by TG and DTA techniques. These metal complexes decompose in two ... -
Estimation of association constants of macrocyclic ethers by potentiometry. Part V. Na+ binding in dioxane/water (80/20)
(Taylor & Francis Ltd, 2004)The various association constants, beta(nm) and K-nm, of NaCl and NaClO4 with [12]crown-4, [15]crown-5, [18]crown-6, benzo[15]crown-5, benzo[12]crown-4, dibenzo[18]crown-6 and dinaphtho[18]crown-6 have been estimated in a ... -
Synthesis and characterization of a novel oxovanadium(IV) complex and conductometric studies with N,N '-bis(salicylidene)-1,2-bis-(p-aminophenoxy)ethane
(Marcel Dekker Inc, 2004)A new oxovanadium complex of the Schiff base obtained by the condensation of 1,2-bis(p-aminophenoxy)ethane with salicylaldehyde was synthesized. The complex has been characterized by elemental analyses, magnetic measurements, ... -
Dissolution Kinetics and Mechanism of Ulexite in Oxalic Acid Solutions
(Amer Chemical Soc, 2004)The dissolution rates of ulexite in oxalic acid solutions were investigated statistically and graphically using homogeneous and heterogeneous reaction models at different stirring speeds, particle sizes, acid concentrations, ... -
Fractionation analysis of magnesium in olive products by atomic absorption spectrometry
(Elsevier Science Bv, 2004)A scheme is presented for fractionation of olive components and magnesium determinations in different fractions. The charge of metal species was established using cation exchange with Dowex 50Wx8-40. The resin Amberlite ... -
Synthesis of some 3-phenyl chromenone-crown ethers and equilibrium studies on complexation with ion-pair extraction of sodium and potassium dyes
(Elsevier Science Bv, 2004)6,7-Dihydroxy-3-phenyl-2H-chromenones and 7,8-dihydroxy-3-(methoxyphenyl)-2H-chromenones, o-dihydroxy-3-phenylcoumarins, were prepared from phenylacetic acid/2,4,5-trihydroxybenzaldehyde, methoxyphenylacetic acid/2,3,4-t ... -
Qualitative analysis of Cu2+, Co2+, and Ni2+ cations using thin-layer chromatography
(Preston Publications Inc, 2004)The M(DEDTC)2 (M = Cu, Co, or Ni) and M(PyDTC)2 (M = Cu or Co) complexes prepared by reactions of sodium diethyldithiocarbamate and ammonium pyrollidinedithiocarbamate with metal (II) nitrates are examined for qualitative ... -
Incorporation of an allene unit into alpha-pinene: Generation of the cyclic allene 2,7,7-trimethylbicyclo[4.1.]octa-2,3-diene and its dimerization
(Amer Chemical Soc, 2004)The reaction of etheral methyllithium with 3,3-dibromo-2,7,7-trimethyl-tricyclo[4.1.1.0.(2,4)] octane (2) was investigated. The generated carbene 12 undergoes intramolecular C-H insertion to provide the tetracyclic hydrocarbon ... -
Complexation studies of some newly synthesized precursors for substituted dibenzo and dibenzodiaza crown ethers
(John Wiley & Sons Inc, 2004)This study represents the synthesis of dibenzo and dibenzodiaza crown ether precursors with various functional groups in good yield by employing four different methods using polar protic and aprotic solvents with high ... -
Phosphonate-based resins for the selective enrichment of uranium(VI)
(Elsevier Science Bv, 1999)Phosphonate-derivatized polystyrene-divinylbenzene-based (PS-DVB) resins have been prepared from chloromethylpolystyrene-divinylbenzene (Cl-CH(2)-PS-DVB) by the Arbuzov-reaction using lithium or sodium alkyl chlorophosphites. ... -
A new method for purification of carbonic anhydrase isozymes by affinity chromatography
(Maik Nauka/Interperiodica/Springer, 2004)A new affinity gel for purification of carbonic anhydrase isozymes was prepared using EUPERGIT(R) C-250L derivatized with p-aminobenzenesulfonamide, an inhibitor of carbonic anhydrase. The binding capacity of the affinity ... -
A new dispersive liquid-liquid microextraction method for preconcentration of copper from waters and cereal flours and determination by flame atomic absorption spectrometry
(Springer International Publishing Ag, 2014)A simple, rapid, sensitive, and inexpensive dispersive liquid-liquid microextraction method was developed for the determination of trace amounts of copper by flame atomic absorption spectrometry (FAAS). N,N'-bis-(2-hydro ... -
Determination of Rare Earth Elements by Solid Phase Extraction Using Chemically Modified Amberlite XAD-4 Resin and Inductively Coupled Plasma-Optical Emission Spectrometry
(Sprınger, 2014)A new solid phase extraction method was developed for the preconcentration and determination of the rare earth elements (REEs) Pr, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb, and Lu at trace levels using a mini-column packed with ... -
Solid-state synthesis of Pb2Sr2CaCU3-ySx and conducting properties
(Trans Tech Publications Ltd, 2004)In this study complete substitution of O by S in Pb-Sr-Ca-Cu-O superconducting system that has the general formula Pb2Sr2MCu3O8+delta (M = Y, Ca) had been attempted. For this purpose, solid-gas reactions of solid mixture, ...
