Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 678, listelenen: 401-420
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On-line preconcentration and determination of trace elements in waters and reference cereal materials by flow injection - FAAS using newly synthesized 8-hydroxy-2-quinoline carboxaldehyde functionalized Amberlite XAD-4
(Academic Press Inc Elsevier Science, 2013)A new chelating resin has been developed using Amberlite XAD-4 resin anchored with 8-hydroxy-2-quinoline carboxaldehyde through -C=N- group. The synthesized resin, characterized by infrared spectroscopy, was used as packing ... -
Optical fluoride sensing with a bay region functionalized perylenediimide dye
(Scientific Technical Research Council Turkey-Tubitak, 2006)A perylenedimiide (PDI) derivative functionalized at the perylene core (bay region) to carry phenyl boronic acid groups was shown to interact with fluoride with changes in the emission and absorption spectrum. These changes ... -
Purification and characterization of Ocimum basilicum L. polyphenol oxidase
(Amer Chemical Soc,, 2005)A partial characterization of polyphenol oxidase (PPO) activity in Ocimum basilicum L. is described. PPO in O. basilicum L. was extracted and purified through (NH4)(2)SO4 precipitation, dialysis, and a Sepharose ... -
An investigation of chloride-substituted Schiff bases as corrosion inhibitors for steel
(Pergamon-Elsevier Science Ltd, 2003)Polarization and impedance measurements were performed on steel in deaerated 5% HCl solution with and without Schiff base additives within the concentration range 1 x 10(-4)-5 x 10(-3) mol/dm(3). The Schiff base compounds ... -
A microwave-assisted route for the solid-state synthesis of lead pyrophosphate, Pb2P2O7
(Springer, 2005)In this study, we have developed a new method based on microwave heating for the preparation of lead pyrophosphate compound, Pb2P2O7. The favoring of microwave heating as synthesis technique is based on the fact being much ... -
Quantum chemical investigation of monostanna[n]cyclacenes
(Springer/Plenum Publishers, 2003)Semiempirical molecular orbital treatment at the level of PM3 type calculations has been performed on the Huckel-type monostannacyclacenes having tin atom at the fusion and periposition of arenoid rings. The effect of tin ... -
Synthesis of sodium neodymium diphosphate, NaNdP2O7, and its powder XRD data and IR spectra
(Taylor & Francis Ltd,, 2005)NaNdP2O7 was synthesized by the solution reaction of NdCl3 with Na4P2O7 and heated the precipitate at 650 degrees C for 6-7 h. The X-ray powder diffraction data of this compound was indexed in the orthorhombic system with ... -
A new route for the synthesis of cadmium sulfide by reacting of cadmium oxide with a sulfidizing gas mixture
(Maik Nauka, 2005)In this study, the sulfidization of CdO was investigated by using solid-gas reactions under a sulfidizing gas mixture that contained a gas mixture of carbonyl sulfide, COS, carbon disulfide, CS2 and sulfur Si. The greenockite ... -
The effect of alkali concentration and solid/liquid ratio on the hydrothermal synthesis of zeolite NaA from natural kaolinite
(Elsevier Science Bv, 2005)Zeolite NaA and hydroxy sodalite materials were synthesized successfully by hydrothermal method using the natural kaolinite. In the first step, kaolinite has been calcined at 600 degrees C for 2 h. IR spectra and DTA-TG ... -
Adsorption of CTAB onto perlite samples from aqueous solutions
(Academic Press Inc Elsevier Science, 2005)In this study, the adsorption properties of unexpanded and expanded perlite samples in aqueous cetyltrimethylammonium bromide (CTAB) solutions were investigated as a function of ionic strength, pH, and temperature. It was ... -
Investigation of dissociation properties of oxalic acid-solvent systems by UV-spectrophotometry
(Elsevier Science Bv, 2005)In this study, the UV absorbance of oxalic acid that change with temperature and concentration in the dissociation media was investigated. For every solution system, the relationships between absorbance, A, and concentration, ... -
Adsorption of cationic polyacrylamide onto kaolinite
(Elsevier Science Bv,, 2005)The adsorption of the cationic polymer, polyacrylamide (PAM), onto kaolinite was investigated. Polyacrylamides are among the most commonly used polymers in industry and adsorption of PAM onto kaolinite from aqueous solutions ... -
Carbonic anhydrase inhibitors: Inhibition of the tumor-associated isozymes IX and XII with a library of aromatic and heteroaromatic sulfonamides
(Pergamon-Elsevier Science Ltd, 2005)The inhibition of the two transmembrane, tumor-associated isozymes of carbonic anhydrase (CA, EC 4.2.1.1) of human origin, hCA IX and XII, with a library of aromatic and heteroaromatic sulfonamides has been investigated. ... -
Some kinetic properties of polyphenol oxidase obtained from various Salvia species (Salvia viridis L., Salvia virgata Jacq. and Salvia tomentosa Miller)
(Sage Publıcatıons Ltd, 1, 2003)Polyphenol oxidase (PPO) was partially purified by (NH4)(2)SO4 precipitation followed by dialysis from different organs of Salvia species (Salvia virgata Jacq., Salvia viridis L. and Salvia tomentosa Miller). Polyphenol ... -
Solvents effect on infrared spectra of 1,3-indanedione in organic solvents
(Elsevier Science Bv, 2005)Infrared spectroscopy studies of 1,3-indanedione (ID) in 16 different pure organic solvents were undertaken to investigate the solvent-solute interactions and to correlate solvent properties, such as the Kirkwood-Bauer-Magat ... -
Synthesis, characterization, crystal structure and biological activity of a novel heterotetranuclear complex: [NiLPb(SCN)(2)(DMF)(H2O)](2), bis-{[mu-N,N '-bis(salicylidene)-1,3-propanediaminato-aqua-nickel(II)](thiocyanato)(mu-thiocyanato)(mu-N,N '-dimethylformamide)lead(II)}
(Elsevier Science Inc, 2005)The mononuclear nickel complex NiL (LH2 = N,N'-bis(salicylidene)-1,3-diaminopropane) can be transformed into the tetranuclear complex [NiL(H2O)Pb(SCN)(2)(DMF)](2) in the aid of SCN-, DMF (dimethylformamide) and Pb(II) ions. ... -
FTIR and zeta potential measurements of sepiolite treated with some organosilanes
(Elsevier Science Bv, 2005)Sepiolite has been treated with some organosilanes including dimethyloctadecylchlorosilane (DMODCS), dimethyldichlorosilane (DMDCS), and 3-aminopropyltriethoxysilane (3-APT). FTIR measurements have been used to discuss the ... -
Zeta potential of unexpanded and expanded perlite samples in various electrolyte media
(Elsevier Science Bv, 2005)In this study, electrokinetic properties of unexpanded (UEP) and expanded (EP) perlite samples have been extensively investigated as a function of concentration of various electrolytes such as NaCl, KCl, LiCl, NaNO3, ... -
Modified diatomaceous earth as a principal stationary phase component in TLC
(Oxford Univ Press, 2005)Modified natural diatomaceous earth (DE) is a principal component of the stationary phase in normal thin-layer chromatography (TLC) applications and is mixed with commercial silica gel 60GF254 (Si-60GF254). Modification ... -
Synthesis, crystal structure, and electrochemical behaviour of an azido mu-bridged Ni2+ complex
(Wiley-Blackwell, 2003)A homo-dinuclear Ni-II complex was prepared from 2,6-bis(3,5-dimethylpyrazolyl)pyridine (Me-4-bpp) and azide ions in nonaqueous media. It was characterized by single crystal X-ray structural analysis, IR spectroscopy, and ...
