Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 676, listelenen: 221-240
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Preconcentration of Cu(II), Co(II), and Ni(II) using an optimized enrichment procedure: useful and alternative methodology for flame atomic absorption spectrometry
(Sage Publications Inc, 2016)In this paper, a new solid phase extraction procedure is described for Cu(II), Co(II), and Ni(II). Silica gel which was coated with N,N'-bis(4-methoxysalicylidene) ethylenediamine (MSE) is used as a sorbent. Three independent ... -
Chemically modified silica gel with n-(2-aminoethyl)-salicylaldimine for simultaneous solid phase extraction and preconcentration of Cu(ii), Ni(ii), Cd(ii) and Zn(ii) in waters
(Springer, 2012)In this study, N-(2-aminoethyl)salicylaldimine bonded silica gel was synthesized and characterized using Fourier transform infrared and C, H, N elemental analysis. The analytical conditions such as the pH and volume of the ... -
Kinetic properties of polyphenol oxidase obtained from various olives (Olea europa L.)
(Asian Journal of Chemistry, 2012)In this study, the biochemical properties of olive polyphenol oxidase (PPO) which are known to be the primary reason for enzymatic browning, have been investigated. The polyphenol oxidase of Olea europaea L. cultivars ... -
Novel route to prepare magnetic material co3v2o8 and structural characterization
(Polish Acad Sciences Inst Physics, 2012)Co3V2O8 is a member of kagome staircase oxides, represented by general formula M3V2O8 (M = Ni, Co, Mn). It attracted great attention due to strong magnetic anisotropy, magnetic phase transition, genuine macroscopic quantum ... -
An alternative purification method for human serum paraoxonase 1 and its interactions with anabolic compounds
(Taylor & Francis Ltd, 2016)In this study, an alternative purification method for human paraoxonase 1 (hPON1) enzyme was developed using two-step procedures, namely, ammonium sulfate precipitation and Sepharose-4B-l-tyrosine-3-aminophenantrene ... -
Functionalized imidazolium and benzimidazolium salts as paraoxonase 1 inhibitors: Synthesis, characterization and molecular docking studies
(Pergamon-Elsevier Science Ltd, 2016)Paraoxonase (PON) is a key enzyme in metabolism of living organisms and decreased activity of PON1 was acknowledged as a risk for atherosclerosis and organophosphate toxicity. The present study describes the synthesis, ... -
Extraction of nickel from edible oils with a complexing agent prior to determination by FAAS
(Elsevier Sci Ltd, 2016)In the present work, a new extraction method for separation of nickel from edible oils and determination by FAAS is reported. This method is based on extraction of Ni(II) ions from the oil to aqueous phase with ... -
Strong Paramagnetic Crystalline LnVO(4) (Ln: Gd, Tb, Dy, Ho, Er) Nanoparticles Synthesized By a Fabricating Method
(Elsevier Science Sa, 2016)Strong paramagnetic lanthanide orthovanadate (LnVO(4), Ln: Gd, Tb, Dy, Ho, Er) nanoparticles were synthesized under ambient conditions by a novel precipitation method that is economical and fabricating. To the X-ray ... -
Ring-opening mechanism of disilacyclopropylidenoids and trisilacyclopropylidenoid: A theoretical study
(Elsevier Science SA, 2012)Ab-initio and density functional theory calculations have been performed to investigate the ring-opening reactions of 1-bromo-1-lithiodisilirane (5), 3-bromo-3-lithiodisilirane (6), and 1-bromo-1-lithiotrisilirane (7) to ... -
An FT-IR and DFT based new approach for the detection of tautomer proportions in solution
(Elsevier Science Bv, 2012)Tautomer proportions of acetylacetone (acac) in six different solvents are investigated with a new method by means of experimental absorptions (A) and theoretical absorption coefficients (e). The specific absorption bands ... -
In vitro efficacy of some cattle drugs on bovine serum paraoxonase 1 (PON1) activity
(Informa Healthcare, 2012)Serum paraoxonase 1 (EC 3.1.8.1, PON1), a calcium-associated enzyme, has an ability to hydrolyze organophosphate compounds. Related to this property, PON1 has a critical role in antioxidant mechanisms. It is well-known ... -
Synthesis, extraction and antibacterial studies of some new bis-1,2,4-triazole derivatives part II
(Springer, 2012)The treatment of 4-amino-3,5-diphenyl-4H-1,2,4-triazole 3 with various bis-aldehydes resulted in the formation of bis-4-arylidenamino-3,5-diphenyl-4H-1,2,4-triazoles (4a-d) derivatives. NaBH4 reduction of 4-arylidenamino ... -
Synthesis and evaluation in vitro effects of some macrocyclic thiacrown ethers on erythrocyte carbonic anhydrase I and II
(Asian Journal of Chemistry, 2012)A new series of macrocyclic thiacrown ethers (A1-6) were synthesized. These compounds were investigated as erythrocyte carbonic anhydrase I and II, which had been purified by Sepharose-4B-L-tyrosine-sulfonamide affinity ... -
Immobilization of paraoxonase onto chitosan and its characterization
(Informa Healthcare, 2012)Paraoxonase was covalently immobilized onto a glutaraldehyde containing amino group functionalized chitosan surface by chemical immobilization at pH 8.0. The amount of covalently bound hPON1 was found to be 32 mg/10 chitosan ... -
In vitro effect of novel beta-lactam compounds on xanthine oxidase enzyme activity
(Informa Healthcare, 2012)Carbazole substituted imines (2a-I) were prepared from N-methyl-3-amino carbazole with different aldehydes. The imines compounds undergo (2 + 2) cycloaddition reactions with in situ ketenes to produce beta-lactam compounds ... -
Purification and characterization of prophenoloxidase from Galleria mellonella L.
(Informa Healthcare, 2012)Prophenoloxidase (PPO) was purified from Galleria mellonella L. A 67-fold purification of the proenzyme with 352% yield was achieved by using a Sepharose 4B-L-tyrosine-p-amino benzoic acid affinity column. The purified ... -
Effects of some metals on paraoxonase activity from shark Scyliorhinus canicula
(Taylor & Francis Ltd, 2012)Paraoxonase (PON) is an organophosphate hydrolyser enzyme which also has antioxidant properties in metabolism. Due to its crucial functions, the inhibition of the enzyme is undesirable and very dangerous. PON enzyme activity ... -
A new hybrid (experimental-theoretical) quantitative method for detection of relative anomer concentrations in water
(Springer, 2016)A novel and inexpensive hybrid (combined experimental and theoretical) approach was used to quantitatively identify anomer proportions of d-glucose, d-galactose and d-mannose in water. The study involves three parts: ... -
Removal of methylene blue from aqueous solutions using phosphoric acid activated carbon produced from hazelnut husks
(Taylor & Francis Ltd, 2012)In this study, activated carbon (HHPAAC) was prepared from hazelnut husks using phosphoric acid activation and characterized by some physicochemical analyses. Surface area and zero point charge of pH (pH(PZC)) were found ...
