Güncel Gönderiler: Kimya Bölümü
Toplam kayıt 724, listelenen: 541-560
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Electrokinetic properties of sepiolite suspensions in different electrolyte media
(Academic Press Inc Elsevier Science, 2005)The present paper deals with the electrokinetic characterization of sepiolite. A series of systematic zeta potential measurements have been carried out to determine the isoelectric point (iep) and potential-determining ... -
Bentonite-supported catalase
(Serbian Chemical Soc, 2005)The properties of the clay bentonite as a support for enzyme immobilization were studied using the enzyme catalase. Such an immobilization does not result in enzyme inactivation and constitutes a valuable method for ... -
The determination of crown-cation complexation behavior in dioxane/water mixtures by conductometric studies
(John Wiley & Sons LTD, 1998)Using conductance measurements, an attempt has been made to gain detailed information about the specific molecular interactions of crown compounds with metal ions in a 1,4-dioxane/water binary system. Analyses of the ... -
Reduction of Aflatoxin B1 To Aflatoxicol: A Comprehensive DFT Study Provides Clues To İts Toxicity
(Wiley-Blackwell, 2014)BACKGROUNDAflatoxicol (AFL) is one of most the important metabolites of aflatoxin B1 (AFB1). AFL can be formed through enzymatic or synthetic reduction of AFB1. Various experimental and theoretical studies have been focused ... -
Extraction of trace elements by ultrasound-assisted emulsification from edible oils producing detergentless microemulsions
(Elsevier Sci Ltd, 2015)The aim of this study is to develop a new method for the extraction and preconcentration of trace elements from edible oils via an ultrasound-assisted extraction using ethylenediaminetetraacetic acid (EDTA) producing ... -
Interaction of carbonic anhydrase isozymes I, II, and IX with some pyridine and phenol hydrazinecarbothioamide derivatives
(Pergamon-Elsevier Science Ltd, 2015)A series of hydrazinecarbothioamide derivatives incorporating ethyl, phenyl, tolyl, benzyl, and allyl moieties were prepared and tested as possible inhibitors of three members of the pH regulatory enzyme family, carbonic ... -
Thermal behaviour of some metal complexes of N,N-diethyl-N'-benzoyl thiourea
(John Wiley & Sons Ltd, 1997)The thermal behaviour of the complexes of N,N-diethyl-N'-benzoylthiourea (DEBT) with NI(II), Cu(II), Pt(II), Pd(II) and Ru(III) was studied using differential thermal analysis (DTA) and thermogravimetry (TG). These complexes ... -
A mechanistic investigation on the formation and rearrangement of silaspiropentane: A theoretical study
(Springer, 2016)The formation of silaspiropentane from addition of singlet silacyclopropylidene 1 and silacyclopropylidenoid 8 to ethylene has been investigated separately at the B3LYP, X3LYP, WB97XD, and M05–2X theories using the 6–31+G(d,p) ... -
Flame AAS determination of platinum, palladium, and rhodium in catalysts
(Perkin-Elmer Corp, 1997)A flame atomic absorption spectrometric method is described for the determination of platinum, palladium, and rhodium in used and fresh alumina-supported and sieve catalysts. A lanthanum solution was used to eliminate ... -
Electrokinetic properties of perlite
(Academic Press Inc Jnl-Comp Subscriptions, 1997)Electrokinetic properties of expanded and unexpanded perlite samples have been investigated using the microelectrophoresis technique. Perlite samples yield practically no isoelectric point in the pH range of 3 to II. Both ... -
Investigation of suitable digestion methods for the determination of total phosphorus in soils
(Elsevier Science Bv, 1997)Total phosphorus in five soils with different compositions which were obtained from different places were extracted by using Na2CO3 fusion, HClO4 digestion, HClO4 + HNO3 digestion, HF + HClO4 digestion or NaOBr oxidation ... -
Theoretical investigations on the electronic and structural properties of stannacyclopropylidenoids and plumbacyclopropylidenoids
(Maik Nauka/Interperiodica/Springer, 2015)The theoretical calculations at the MP2 and WB97XD levels have been carried out to investigate the isomeric structures, energies and properties of heavycyclopropylidenoids (C2H4MLiBr, M = Sn or Pb). The theoretical ... -
Spectrometric determination of iron and copper in vegetable oils after separation with schiff base impregnated silica gel column: a simple approach for eliminating the high organic matrix
(Wiley-Blackwell, 2015)A simple solid-phase extraction method has been described for the separation of Fe(III) and Cu(II) from liquid vegetable oils using N,N'-bis(4-methoxy salicylidene) ethylenediamine impregnated silica gel and the determination ... -
Computational investigations on the electronic and structural properties of germacyclopropylidenoids
(Elsevier Science BV, 2013)DFT (B3LYP) and ab initio (MP2) levels of theories using standard 6-31+G(d,p) basis set have been carried out to investigate the isomeric structures, energies and properties of LiBr-germacyclopropylidenoids. The theoretical ... -
Properties of iron oxide nanoparticles synthesized at different temperatures
(Springer, 2011)Iron oxide nanoparticles were synthesized by co-precipitation in air atmosphere at different temperatures and their structural and magnetic properties were investigated. The mean particle sizes of iron oxide nanoparticles ... -
Heavy metal concentrations in tissues of edible fish (MULLUS BARBATUS L., 1758) from the Candarli bay (Turkey)
(Parlar Scientific Publications (P S P),, 2011)Heavy metal contents were investigated in different organ tissues of Mullus barbatus (L., 1758) from Candarli Bay in the northeast Agean Sea in May 2004. Muscle, liver and gill tissue were analyzed for copper, lead, chromium, ... -
Determination of molybdenum by adsorptive catalytic stripping voltammetry in the presence of alizarin red s and persulphate
(Parlar Scientific Publications (P S P),, 2011)An alternative and sensitive method by adsorptive catalytic stripping voltammetry for the determination of trace molybdenum is proposed. The method is based on the adsorption collection of the Mo(VI)-Alizarin Red S complex ... -
An experimental and theoretical study on siderol isolated from sideritis species
(Inst Organic Chem and Biochem, 2011)The Fourier transform infrared (FTIR) spectrum of siderol, extracted from the aerial parts of Sideritis Gulendamii, has been measured in the range 4000-400 cm(-1). Vibrational assignments and analyses of the fundamental ... -
The use of chelating solid phase materials in flow injection systems: a review
(Taylor & Francis INC, 2011)Flow injection analyses facilitate faster, inexpensive, and more environmentally friendly sample-preparation techniques than many traditional owet chemistryo methods, and the use of flow injection has, therefore, expanded ... -
New energetic copper(II) complexes with pyrazolyl type ligands
(Wiley-V C H Verlag Gmbh, 2011)Nine Cu-II complexes (I-IX) containing the azide ion and bis-2,6-(pyrazol-1-yl)pyridine (pp), bis-2,6-(pyrazol-1-yl)pyridine (dmpp), and 2-(pyrazol-1-yl)-6-(3,5-dirnethylpyrazol-1-yl)pyridine (mpp), which are derivatives ...
