Başlık için Makale Koleksiyonu listeleme
Toplam kayıt 1058, listelenen: 15-34
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An ab initio study on protonation of some substituted thiazole derivatives
(Elsevier Science BV, 2005)The preferred tautomeric forms of some 2-oxothiazole derivatives were predicted using acidity constants calculated by experimental and ab initio methods. Thiazole derivatives were subject to geometry optimization at two ... -
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 ... -
Absorption mechanism, structural and electronic properties of MC19 (M = B and Si) fullerenes with 1-acetylpiperazine
(Sage Publications Inc, 2018)The interaction mechanisms of undoped, silicon- and boron-doped C20 fullerenes and 1-acetylpiperazine (1-ap) were investigated. Stability, electronic properties, influence of water on the solubility and stability, molecular ... -
Acceptor formation in Mg-doped, indium-rich GaxIn1-xN: evidence for p-type conductivity
(Springer, 2012)We report on the Mg-doped, indium-rich Ga (x) In1-x N (x < 30). In the undoped material, the intrinsic electron density is very high and as a result there is no detectable photoconductivity (PC) signal within the range of ... -
Acid treated mordenites as adsorbents of C2H4 and H-2 gases
(Elsevier Science BV, 2017)In this study, a mordenite-rich tuff (M) from the Sile region (NW Turkey) was treated with HNO3 and H2SO4 at various concentrations (1.0, 3.0 and 5.0 M) at 80 degrees C for 3 h. The adsorption properties of ethylene (C2H4) ... -
The acidities of some indoles
(Elsevier Science BV, 2002)We wish to present an experimental and theoretical study for the estimation of pK(a) values of some 1-, 2- and 1,2-substituted indoles in aqueous solution by spectroscopic and semiempirical methods. The all possible ... -
Acidity constant determination of novel drug precursor benzothiazolon derivatives including acyl and piperazine moieties
(Pergamon-Elsevier Science LTD, 2013)In this study, protonation and deprotonation behaviors of eight new drug precursor benzothiazolon derivatives in all of acidic and basic scale (super acidic, pH, super basic regions) are analyzed by using UV-visible ... -
Acidity study on 3-substituted pyridines
(MDPI AG, 2005)A comprehensive theoretical study for the protonation of some 3-substituted pyridines has been carried out in aqueous solution (epsilon = 78.4) by semi empirical AM1 method in MOPAC2000 and PM5 method in MOPAC2002. Solvent ... -
Acidity study on some pyridazines
(Elsevier Science BV, 2004)The tautomeric, conformational equilibrium positions, and pK(a) values of some pyridazine derivatives 1-17 have been examined by means of semi empirical AM1 COSMO calculations in aqueous solution (epsilon=78.4). The results ... -
Activated Carbons From Grape Seeds By Chemical Activation With Potassium Carbonate And Potassium Hydroxide
(Elsevier, 2014)Activated carbons were produced from grape seed using either potassium carbonate (K2CO3) or potassium hydroxide (KOH). The carbonization experiments were accomplished at 600 and 800 degrees C. The effects of the experimental ... -
Activated carbons from waste biomass by sulfuric acid activation and their use on methylene blue adsorption
(Elsevier Sci LTD, 2008)Preparation of the activated carbons from sunflower oil cake by sulphuric acid activation with different impregnation ratios was carried out. Laboratory prepared activated carbons were used as adsorbents for the removal ... -
Adsorption behavior of a disperse dye on polyester in supercritical carbon dioxide
(Elsevier Science BV, 2005)In order to understand the adsorption behavior of the dyeing of polyester fibres in supercritical carbon dioxide at 95 degrees C and 300 bar, the rate of dyeing and the equilibrium adsorption of a disperse dye, C.I. Disperse ... -
Adsorption behaviours of lysozyme onto poly-hydroxyethyl methacrylate cryogels containing methacryloyl antipyrine-Ce(III)
(Taylor & Francis As, 2018)In this study, Ce3+-based cryogel with methacryloyl antipyrine (MAAP) and 2-hydroxyethyl methacrylic acid (HEMA) [p(HEMA-MAAP-Ce3+] was prepared. MAAP-Ce3+ complex was characterized by UV-near infrared and energy-dispersive ... -
Adsorption kinetics and isotherm parameters of naphthalene onto natural- and chemically modified bentonite from aqueous solutions
(Springer, 2013)Polycyclic aromatic hydrocarbons (PAHs) have widely been studied and a special concern because of their mutagenic and carcinogenic activities. In this study, natural- and chemically modified-bentonite were characterized ... -
Adsorption mechanism, structural and electronic properties: 4-Phenylpyridine & undoped or doped (B or Si) C60
(Elsevier Science BV, 2017)Interaction mechanisms of fullerene derivatives and various types of molecules have been paid increasing attention. In this research, interaction mechanism, structural and electronic properties, natural bond orbital (NBO) ... -
Adsorption Mechanisms of 6-Chloro-3-Hydroxy-2-Pyrazinecarboxamide on Pristine, Si- and Al-Doped C-60 Fullerenes: A DFT Study
(Springer/Plenum Publishers, 2017)Fullerenes have been of research interest and they have been particularly studied for their possible applications as drug delivery vehicles. In the present research, the optimized molecular geometries, electronic properties ... -
Adsorption of Acid Blue 193 from aqueous solutions onto BTMA-bentonite
(Elsevier Science BV, 2005)The adsorption of Acid Blue 193 (AB193) onto benzyltrimethylammonium (BTMA)-bentonite was investigated in aqueous solution in a batch system with respect to contact time, pH and temperature. The surface modification of ... -
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 ... -
Adsorption of Acid Blue 193 from aqueous solutions onto Na-bentonite and DTMA-bentonite
(Academic Press Inc Elsevier Science, 2004)Dodecyltrimethylammonium bromide-modified bentonite (DTMA-bentonite) was prepared and tested as an adsorbent for an acid dye (Acid Blue 193, AB 193) removal from aqueous solution in comparison with Na-bentonite. The effect ... -
Adsorption of acid dyes from aqueous solutions onto acid-activated bentonite
(Academic Press Inc Elsevier Science, 2004)The adsorption of two dyes, namely, Acid Red 57 (AR57) and Acid Blue 294 (AB294), onto acid-activated bentonite in aqueous solution was studied in a batch system with respect to contact time, pH, and temperature. Acidic ...
