Güncel Gönderiler: Kimya-Makale Koleksiyonu
Toplam kayıt 678, listelenen: 501-520
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Differential in vitro effects of some pesticides on carbonic anhydrase activities from some freshwater and seawater fish erythrocytes
(Parlar Scientific Publications (P S P), 2004)The purpose of this study was to investigate the in vitro effects of 4 commonly used pesticides: the fungicides Nuarimol(TM) [alpha-(2-chlorophenyl)-alpha-(4-fluorophenyl)-5-pyridinemethanol] and Fenarimol(TM) [alpha-(2- ... -
Some physicochemical properties of perlite as an adsorbent
(Parlar Scientific Publications (P S P), 2004)Perlite is a glassy volcanic rock, which will, upon rapid controlled heating, expand into a frothy material of bulk density. Considering the fact that the uses of perlite are based primarily upon its physical and chemical ... -
Removal of acid yellow 49 from aqueous solution by adsorption
(Parlar Scientific Publications (P S P), 2004)In this study, the removal of an acid dye, acid yellow 49, used in the textile industry with sepiolite was investigated as a function of ionic strength, pH and temperature. Adsorption process was attained to the equilibrium ... -
Preconcentration of heavy metal ions from wastewater by solvent extraction using N,N '-bis(2-hydroxy-5-bromo-benzyl)-1,2 diaminopropane prior to their determination by flame atomic absorption spectrometry
(Taylor & Francis Ltd,, 2004)Toxic heavy metals such as copper(II), lead(II), cadmium(II), manganese(II), zinc(II), cobalt(II), and nickel(II) in wastewater can be preconcentrated in the organic phase containing a new reagent, N,N'-bis(2-hydroxy-5-b ... -
Synthesis and crystal structure of two dimeric cadmium(II) complexes bonded with pseudohalides, 1.1 and 1.3 bonding
(Walter De Gruyter Gmbh, 2004)Two different complexes were obtained from (dmpp) and Cd(II) ions with the aid of pseudohalide ions in non-aqueous solvents. The dinuclear complex formed with thiocyanate ions shows, using XRD, to posses two 1.3 bond mu ... -
Preconcentration and determination of trace elements with 2,6-diacetylpyridine functionalized Amberlite XAD-4 by flow injection and atomic spectroscopy
(Royal Soc Chemistry, 2005)An on-line flow injection method for the direct determination of trace elements in environmental samples is described. A mini-column packed with 2,6-diacetylpyridine functionalized Amberlite XAD-4 was used to preconcentrate ... -
Separation and removal of mercury(II) from water samples using (acetylacetone)-2-thiol-phenyleneimine immobilized on anion-exchange resin prior to determination by cold vapor inductively coupled plasma atomic emission spectroscopy
(Taylor & Francis Ltd, 2005)(Acetylacetone)-2-thiol-phenyleneimine (H2L) immobilized on an anion-exchange resin (Dowex) was used for separation and removal of mercury from natural water samples and for preconcentration prior to its determination by ... -
Zeta potentials of perlite modified with dimethyldichlorosilane, 3-aminopropyltriethoxysilane and dimethyloctadecylchlorosilane
(Parlar Scientific Publications (P S P), 2005)Expanded perlite (EP) samples have been treated with dimethyldichlorosilane (DMDCS), 3-aminopropyl-triethoxy-silane (3-APT) and dimethyloctadecylchlorosilane (DMODCS). By studying the IR spectra of the samples, the perlite ... -
Dyeing of modified cotton fibres with disperse dyes from supercritical carbon dioxide
(Soc Dyers Colourists, 1998)Cotton, previously modified by reaction with benzoyl chloride and sodium benzoylthioglycollate, was dyed with disperse dyes APAN and DY82 in supercritical carbon dioxide at 100 degrees C and 300 bar. This process is compared ... -
Detergent less ultrasound-assisted extraction of trace elements from edible oils using lipase as an extractant
(Elsevier Science BV, 2015)A new method for the extraction and preconcentration of trace elements (Al, Ba, Cd, Cu, Fe, Mn, Mo, Ni, Ti, V and Zn) from edible oils by producing detergentless micro-emulsions via an ultrasound-assisted extraction using ... -
Surface titrations of perlite suspensions
(Academic Press Inc, 1998)The surface charge behaviour of unexpanded and expanded perlite samples in KNO3 and NaCl solutions were investigated as a function of pH and ionic strength. The solutions of KNO3 and NaCl ranging from 10(-3) to 1.0 M were ... -
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 ...
