Güncel Gönderiler: Kimya Bölümü
Toplam kayıt 724, listelenen: 241-260
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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 ... -
Chemometric approach to evaluate trace metal concentrations in some spices and herbs
(Elsevier Sci Ltd, 2012)Herbs (mint, thyme and rosemary) and spices (black pepper, chili pepper, cinnamon, cumin, sweet red pepper and turmeric) were analysed using atomic spectrometry and then subjected to chemometric evaluation in an attempt ... -
The investigation of complexation properties and hard-soft acid-base relationship between thiacrown ethers and metal ions
(Bentham Science Publ Ltd, 2016)Background: There are numerious work on thiacrown ethers that are utilized for binding metal ions. Usually, relative binding ratios have been reported for few selected cations in these works. This study aims to develop a ... -
Carbonic anhydrase inhibitors. Inhibition of the beta-class enzyme from the yeast Saccharomyces cerevisiae with anions
(Pergamon-Elsevier Science Ltd, 2008)The protein encoded by the Nce103 gene of Saccharomyces cerevisiae, a beta-carbonic anhydrase (CA, EC 4.2.1.1) designated as scCA, has been cloned, purified, characterized kinetically, and investigated for its inhibition ... -
Inhibition types and some kinetic properties of tyrosinase of deepwater pink shrimp (Parapenaeus longirostris) from edremit bay
(Wiley-Blackwell, 2012)Phenoloxidases (POs) are a family of enzymes including tyrosin-ases, catecholases and laccases, which play an important role inimmune defence mechanisms in various invertebrates. The aim ofthis study was to identify the ... -
Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and Zn ions in aqueous media
(Scientific Technical Research Council Turkey-Tubitak, 2016)A novel preconcentration method for Pb and Zn ions using a column packed with Schiff base modified silica gel is described. The method was based on the sorption of analytes on N,N'-bis(4-methoxysalicylidene)-1,3-propanediamine ... -
The effect of sodium tetraborate on antioxidant enzymes
(Wiley-Blackwell, 2012)Antioxidant enzymes have main role in the defense of mamma-lian blood. Experimental investigations have repeatedly shownthat erythrocytes are particularly sensitive to oxidative stres. Forthis purpose, thein vitrobiochemical ...
