Browsing Chemistry / Kimya by Title
Now showing items 1-20 of 277
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2-D analysis of Ge implanted SiO2 surfaces by laser-induced breakdown spectroscopy
(Elsevier, 2008-10)2-D elemental distribution of Ge in silicon oxide substrates with differing implantation doses of between 3 × 1016 cm- 2 and 1.5 × 1017 cm- 2 has been investigated by Laser-Induced Breakdown Spectroscopy (LIBS). Spectral ... -
6-Bicycloaryl substituted (S)- and (R)-5,6-dihydro-2H-pyran-2-ones: Asymmetric synthesis, and anti-proliferative properties
(Elsevier, 2009-01)(R)-Goniothalamin, is a member of styryl lactones, possesses selective cytotoxicity against cancer cell lines. In this work, replacement of styryl substituent with 2-naphthyl and 3-quinoyl gave new analogues which may have ... -
AAS, XRPD, SEM/EDS, and FTIR characterization of Zn2+ retention by calcite, calcite–kaolinite, and calcite–clinoptilolite minerals
(Elsevier, 2005-04-08)In this study, the sorption behavior of Zn2+ on calcite, kaolinite, and clinoptilolite, in addition to mixtures of calcite with kaolinite and clinoptilolite, was investigated at various loadings and mixture compositions ... -
Absorption spectrum of monomeric pseudoisocyanine: A new perspective and its implications for formation and spectral response of J-aggregates in solution and in thin films
(Elsevier, 2008-05)We argued against the current spectral assignment for absorption spectrum of monomeric PIC which is widely accepted since the pioneering works of Scheibe and Jelley [G. Scheibe, Angew. Chem. 49 (1936) 563; E.E. Jelly, ... -
Acylation of 2-methoxynaphthalene over ion-exchanged β-zeolite
(Elsevier, 2002)Friedel-Crafts acylation of 2-Methoxynaphthalene was carried out over various ion-exchanged β zeolites (Mn+β, where Mn+: In3+, Zn2+, Al3+, Fe3+, La3+) with various anhydride (acetic, propionic and benzoic anhydrides), or ... -
Adsorption of methylene blue from aqueous solution on high lime fly ash: Kinetic, equilibrium, and thermodynamic studies
(Taylor & Francis, 2012-01)Kinetic, equilibrium, and thermodynamic studies were performed for the batch adsorption of methylene blue (MB) on the high lime fly ash as a low cost adsorbent material. The studied operating variables were adsorbent amount, ... -
Adsorption of PEO/PPO triblock co-polymers and wetting of coal
(Elsevier, 1999-01)The adsorption characteristics of PEO/PPO/PEO triblock co-polymers on coal were investigated using surface tension and contact angle measurements. Although these surfactants have been widely used as wetting agents, it was ... -
Aggregation of fillers blended into random elastomeric networks: Theory and comparison with experiments
(Wiley-VCH Verlag, 2006-08-23)A theoretical model describing aggregation of filler particles in amorphous elastomers is proposed. The model is based on a counting technique originally used in genome analysis to characterize the size and distribution ... -
Alumina/water suspensions in the presence of PEO-PPO-PEO triblock copolymers
(Elsevier, 2004-09)The aim of this study was to investigate the stability and dispersion behaviour of aqueous alumina suspensions in the presence of polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) type triblock ... -
Amalgamation performances of gold-coated quartz wool, alumina, silica, sand and carbon fiber for the determination of inorganic mercury in waters by cold vapor atomic absorption spectrometry
(Springer, 2017-05)Different gold-coated sorbents for amalgamation were applied for the determination of inorganic mercury in waters using a home-made cold vapor generation unit coupled to atomic absorption spectrometry. Among the gold-coated ... -
The amido and bisalkoxo-complexes of [Tri(3,5-Dimethylpyrazolyl)Borato]molydenum nitrosyl
(TÜBİTAK, 1998)In this study, the amido nitrosyl molybdenum complex, [Mo{HM(3,5-Me2C3HN2)3}(NO)Cl(NH 2)], was prepared. This compound reacts with alocohols, yielding the bisalkoxo complexes, [Mo{HM(3,5-Me2C3HN2)3}(NO)(OR) 2] (R = Me, Et, ... -
Analytical solution of Poisson-Boltzmann equation for interacting plates of arbitrary potentials and same sign
(Elsevier, 2010-01)Efficient calculation of electrostatic interactions in colloidal systems is becoming more important with the advent of such probing techniques as atomic force microscopy. Such practice requires solving the nonlinear ... -
Ancillary effects of surfactants on filtration of low molecular weight contaminants through cellulose nitrate membrane filters
(Elsevier, 2016-03-05)Removal of contaminants with low molecular weight (<800 Dalton) requires the use of advanced separation techniques such as ultrafiltration (UF) or micellar enhanced ultrafiltration (MEUF). However, surface active agents ... -
Anomalous transmittance of polystyrene-ceria nanocomposites at high particle loadings†
(Royal Society of Chemistry, 2013-01-14)Optical nanocomposites based on transparent polymers and nanosized pigment particles have usually been produced at low particle concentrations due to the undesirable optical scattering of the pigment particles. However, ... -
Antiproliferative activity of (R)-4 '-methylklavuzon on hepatocellular carcinoma cells and EpCAM(+)/CD133(+) cancer stem cells via SIRT1 and Exportin-1 (CRM1) inhibition
(Elsevier, 2019-10)Cytotoxic effects of (R)-4'-methylklavuzon were investigated on hepatocellular carcinoma cells (HuH-7 and HepG2) and HuH-7 EpCAM(+)/CD133(+) cancer stem cells. IC50 of (R)-4'-methylklavuzon was found as 1.25 mu M for HuH-7 ... -
Application of experimental design on determination of aluminum content in saline samples by adsorptive cathodic stripping voltammetry
(TÜBİTAK, 2013)Adsorptive cathodic stripping voltammetric determination of aluminum at ng mL-1 levels in salt samples based on the metal complexation with Calcon (1-(2-hydroxynaphthylazo)-2 naphthol-4-sulfonic acid) and the subsequent ... -
Application of zero-valent iron nanoparticles for the removal of aqueous Co2+ ions under various experimental conditions
(Elsevier, 2008-10-15)Nanosized zero-valent iron (nZVI) is increasingly gaining interest as an efficient sorbent for various types of aqueous pollutants. In this study, nZVI was synthesised by the borohydride reduction method, characterised and ... -
Assessment of the molecular weight distribution of tannin fractions through MALDI-TOF MS analysis of protein-tannin complexes
(American Chemical Society, 2007-03)An innovative mass spectrometry method was developed for determining mass distributions of tannin fractions that cannot be approached through direct MALDI-TOF analysis. It was applied to three procyanidin fractions with ... -
Batch removal of aqueous Cu2+ Ions using nanoparticles of zero-valent iron: a study of the capacity and mechanism of uptake
(American Chemical Society, 2008-06-20)In this study, nZVI prepared by borohydride reduction was applied for the removal of Cu2+ ions under a variety of experimental conditions. The uptake experiments investigated the effects of initial concentration, contact ... -
Biofunctional quantum dots as fluorescence probe for cell-specific targeting
(Elsevier, 2014-02)We describe here the synthesis, characterization, bioconjugation, and application of water-soluble thioglycolic acid TGA-capped CdTe/CdS quantum dots (TGA-QDs) for targeted cellular imaging. Anti-human epidermal growth ...
