Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 676, listelenen: 201-220
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Removal of cationic dyes by kaolinite
(Elsevier Science Bv, 2009)The removal of cationic dyes such as maxilon yellow 4GL (MY 4GL) and maxilon red GIRL (MR GRL) on kaolinite from aqueous solutions has been studied according to the adsorption method. The adsorbed amount of dyes on kaolinite ... -
Fast microwave synthesis and characterization of MgTi2o5
(Carl Hanser Verlag, 2015)Magnesium dititanate, MgTi2O5 was obtained via a microwave synthesis method. Powder X-ray diffraction, infrared spectroscopy and thermogravimetric/differantial thermal analysis measurements have been used to characterize ... -
Simultaneous preconcentration of cd(II) and pb(II) with n,n '-bis(4-methoxysalicylidene) ethylenediamine coated silica gel prior to determination by flame atomic absorption spectrometry
(Springer International Publishing Ag, 2015)In this paper, a silica gel-based new sorbent was prepared with a Schiff base, called as N,N'-bis(4-methoxysalicylidene) ethylenediamine (MSE). The modified silica gel (Si-MSE) was used for simultaneous separation and ... -
Evaluation of trace metal concentrations in some herbs and herbal teas by principal component analysis
(Elsevier Sci Ltd, 2009)Sixteen trace metallic analytes (Ba, Ca, Ce, Co, Cr, Cu, Fe, K, La, Mg, Mn, Na, Ni, P, Sr and Zn) in acid digests of herbal teas were determined and the data subjected to chemometric evaluation in an attempt to classify ... -
Substituent effects on the ring-opening mechanism of gem-dibromospiropentanes to related allenes: a theoretical study
(Wiley-Blackwell, 2016)Density functional theory computations at B3LYP and X3LYP levels were performed for ring openings of substituted gem-dibromospiropentanes (R = -H, -Cl, -Br, -CH3, -SiH3, -OH, -OCH3, -CF3, -BF2, and -SH) to related allenes. ... -
Synthesis, structural characterization and thermal properties of a new copper(II) one-dimensional coordination polymer based on bridging n,n '-bis(2-hydroxybenzylidene)-2,2-dimethylpropane-1,3-diamine and dicyanamide ligands
(Int Union Crystallography, 2016)The design and synthesis of polymeric coordination compounds of 3d transition metals are of great interest in the search for functional materials. The coordination chemistry of the copper(II) ion is of interest currently ... -
Photooxidative degradation of cationic dyes using uv/h2o2 and uv/h2o2/tio2 process
(Parlar Scientific Publications (P S P), 2012)Photooxidative degradation of maxilon yellow 4GL (MY 4GL) and maxilon red GRL (MR GRL) was studied under different conditions. The effects of pH, TiO2 amount, dye concentration and H2O2 concentration on the process were ... -
Chemical constituents of two endemic sideritis species from Turkey with antioxidant activity
(Acg Publications, 2012)In this study, two Sideritis species, endemic to Turkey, S. niveotomentosa Huber - Morathii, S. brevidens P. H. Davis have been studied for their diterpenic compounds and the antioxidant properties. Eight known diterpenoids, ... -
Determination and evaluation of element bioaccessibility in some nuts and seeds by in-vitro gastro-intestinal method
(Determination and evaluation of element bioaccessibility in some nuts and seeds by in-vitro gastro-intestinal method, 2016)Element bioaccessibility in some nuts and seeds has been determined by performing a physiologically based extraction test. Nine elements (B, Ca, Co, Cu, Fe, Mn, Mg, Ni and Zn) in gastric and intestinal phase extractions ... -
In vitro inhibition of polyphenol oxidase by some new diarylureas
(Informa Healthcare, 2012)A new series of N,N'-diarylureas (1-9) was synthesized. These compounds were investigated as inhibitors of polyphenol oxidase (PPO) which had been purified from banana by an affinity gel comprised of Sepharose 4B-L-tyros ... -
Evaluation of in vitro effects of some analgesic drugs on erythrocyte and recombinant carbonic anhydrase I and II
(Informa Healthcare, 2012)The in vitro effects of the injectable form of analgesic drugs, dexketoprofen trometamol, dexamethasone sodium phosphate, metamizole sodium, diclofenac sodium, thiocolchicoside, on the activity of purified human carbonic ... -
The associations of macrocyclic ethers with cations in 1,4-dioxane/water mixtures; potentiometric Na+ and K+ binding measurements and computational study
(Springer, 2012)This paper deals with the study of different degrees of association constants of Na+ and K+ ions with macrocycles of [12]crown-4, [15]crown-5, [18]crown-6, and Diaza[18]crown-6 in (1:1)dioxane/water mixture using the sodium ... -
Synthesis, extraction, and anti-bacterial studies of some new bis-1,2,4-triazole derivatives part I
(Wiley-Blackwell, 2012)A series of new bis triazole Schiff base derivatives (4) were prepared in good yields by treatment of 4-amino-3,5-diphenyl-4H-1,2,4-triazole (3) with bisaldehydes (1). Schiff bases (4) were reduced with NaBH(4) to afford ... -
Modified silica gels and their use for the preconcentration of trace elements
(Taylor & Francis İnc, 2012)This article presents the state-of-the-art of modified silica gels with different inorganic and organic chemicals and their use for the separation of trace elements from different sample matrices as well as their ... -
In vitro effects of some anabolic compounds on erythrocyte carbonic anhydrase I and II
(Informa Healthcare, 2012)The in vitro effects of the anabolic compounds, zeranol, 17 beta-estradiol, diethylstilbestrol (DES), and trenbolone, on the activity of purified human carbonic anhydrase I and II were evaluated. In vitro CA enzyme activity ... -
In vitro effects of some herbicides and fungicides on human erythrocyte carbonic anhydrase activity
(Parlar Scientific Publications (P S P), 2012)The effects of Imazethapyr, 2,4-D dimethylamine salt, Glyphosate isopropylamine salt and Propamocarb HCl, which are commonly used in agricultural fields, have been investigated on human erythrocyte carbonic anhydrase ... -
Mutation of active site residues Asn67 to Ile, Gln92 to Val and Leu204 to Ser in human carbonic anhydrase ii: influences on the catalytic activity and affinity for inhibitors
(Pergamon-Elsevier Science Ltd, 2012)Site-directed mutagenesis has been used to change three amino acid residues involved in the binding of inhibitors (Asn67Ile; Gln92Val and Leu204Ser) within the active site of human carbonic anhydrase (CA, EC 4.2.1.1) II ... -
Fatty acid composition and chemotaxonomic evaluation of species of Stachys
(Taylor & Francis Ltd, 2012)The fatty acid composition of the seed oil of 23 Stachys taxa was analysed by GC/MS. The main compounds were found to be linoleic (27.1-64.3%), oleic (20.25-48.1%), palmitic (4.3-9.1%), stearic (trace to 5.2%) and ... -
Chemometric evaluation for the relation of BCR sequential extraction method and in vitro gastro-intestinal method for the assessment of metal bioavailability in contaminated soils in Turkey
(Springer Heidelberg, 2012)A chemometric evaluation has been done to classify metal ions in soils and to determine whether or not the gastric and intestinal phases of a physiologically based extraction test bear any relation to any of the phases of ... -
New saccharin derivatives as tyrosinase inhibitors
(Pergamon-Elsevier Science Ltd, 2012)A newly series of 6-(phenylurenyl/thiourenyl) saccharin (6a-y) derivatives were synthesized and their inhibitory effects on the diphenolase activity of banana tyrosinase were evaluated. A 70-fold purification of the enzyme ...
