Ara
Toplam kayıt 42, listelenen: 1-10
Spectroscopic determination of acid dissociation constants of some pyridyl Shiff bases
(American Chemical Society, 2006)
The acid dissociation constants (pK(a)) of eight biologically active pyridyl Shiff bases were determined using a UV-vis spectroscopic technique at 25 +/- 0.1 degrees C. The first acidity constants (pK(a1)) of the ...
Validated capillary electrophoresis study for the determination of cetirizine in pharmaceutical forms
(Taylor & Francis Inc, 2006)
A capillary electrophoretic method for the determination of cetirizine is described in this study. The method was developed by using a running buffer consisting of 10 mM of 10% methanol with pH 8.5, employing a fused silica ...
Kinetics, isotherm and thermodynamic studies of adsorption of Acid Blue 193 from aqueous solutions onto natural sepiolite
(Elsevier Science BV, 2006)
In the present study, natural sepiolite was used as an adsorbent for the investigation of the adsorption kinetics, isotherms and thermodynamic parameters of an acid dye (Acid Blue 193, AB 193) from aqueous solution at ...
Inverted oscillator
(IOP Publishing LTD, 2006)
The inverted harmonic oscillator problem is investigated quantum mechanically. The exact wavefunction for the confined inverted oscillator is obtained and it is shown that the associated energy eigenvalues are discrete, ...
Solubility of an acid dye in supercritical carbon dioxide by ion-pairing with dodecyltrimethylammonium bromide
(Elsevier Science BV, 2006)
In this study, solubility of Acid Red 57 (AR57), which is an anionic dye, in supercritical CO2 was investigated using an ion-pairing with dodecyltrimethylammonium (DTMA) bromide. The measurements of AR57 and AR57-DTMA in ...
Absorption and emission processes in noncommutative space
(World Scientific Publ Co Pte LTD, 2006)
Atom-field interaction and absorption, emission of photons in noncommutative space are investigated. We calculate the rate and the directional distribution of the radiation. The modified selection rules which govern allowed ...
One-bond and long-range coupling constants of substituted 2-cyanopyridines. GIAO/DFT calculations of proton and carbon chemical shifts and coupling constants
(Elsevier Science BV, 2006)
The magnitude of one bond and long-range coupling constants ((n)J(HH) and (n)J(CH)) in isomeric cyanopyridines-(1, 2, 3), methyl-(4, 5, 6, 7), 3-ethyl-(8), chloro-(9), 3-bromo-(10), acetyl-(11, 12), 5-ethoxycarbonyl-(13) ...
Adsorption of Acid Blue 193 from aqueous solutions onto DEDMA-sepiolite
(Elsevier Science BV, 2006)
The adsorption of Acid Blue 193 (AB 193) onto dodecylethyldimethylammonium (DEDMA)-sepiolite was investigated in aqueous solution in a batch system with respect to contact time, pH and temperature. The surface modification ...
Removal of heavy metal ions by dithiocarbamate-anchored polymer/organosmectite composites
(Elsevier Science BV, 2006)
In this study, the dithiocarbamate-anchored polymer/organosmectite composites were prepared for the removal of heavy metal ions (lead, cadmium and chromium) from aqueous media containing different amounts of these ions ...
Electrochemical and theoretical investigation on the corrosion of aluminium in acidic solution containing some Schiff bases
(Elsevier Science BV, 2006)
The effect of newly synthesised three Schiff bases-2-[2-aza-2-(5-methyl(2-pyridly))vinyl]phenol, 2-[2-aza-2-(5-methyl(2-pyridly))vinyl]-4-bromophenol, 2-[2-aza-2-(5-methyl(2-pyridly))vinyl]-4-chlorophenol-on the corrosion ...