Central European Journal of Chemistry
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Detection of short oligonucleotide sequences using an electrochemical DNA hybridization biosensor
Central European Journal of Chemistry - Tập 8 - Trang 732-736 - 2010
An electrochemical DNA hybridization biosensor was developed for the detection of DNA hybridization using MDB and proflavine as electrochemical labels. The biosensor was based on the interaction of 7-dimethyl-amino-1,2-benzophenoxazi-nium Meldola’s Blue (MDB) and proflavine with double stranded DNA (dsDNA) The electrochemical behaviour of MDB and proflavine as well as its interaction with double s......
Hyperpolarizability of 6-vertex carboranes quantum chemical study
Central European Journal of Chemistry - Tập 1 - Trang 1-9 - 2003
Structure and molecular first hyperpolarizability (β) of nitro-amino-substituted 6-vertex 1,6-carboranes are investigated by means of DFT calculations. The results obtained have revealed that the relative orientation of substituents with respect to the carborane cage influences bond lengths distribution in the cage, which leads to significant changes in the values of hyperpolarizabilities. Calcula......
Palladium-catalyzed amination of quinaldine-5-triflate
Central European Journal of Chemistry - Tập 6 - Trang 33-37 - 2008
Palladium-catalyzed amination reactions of quinoline triflate and the effect of a Pd catalyst, its ligands, solvents, bases, and temperature were studied. This method facilitated an easier pathway for the preparation of aminoquinoline derivatives as potential precursors of new serotoninerg agents.
Thermodynamic description of the Cu-Ni-Pb system
Central European Journal of Chemistry - - 2011
Thermodynamic description is presented for the ternary Cu-Ni-Pb system. Optimized parameters of the sub-systems, Cu-Ni, Cu-Pb and Ni-Pb, are taken from earlier assessments and those of the ternary system are optimized in this study by using the experimental phase equilibrium and thermodynamic data. Better agreement is obtained by the present optimization. Calculated results are compared with the o......
Environmental and economic comparison of waste solvent treatment options
Central European Journal of Chemistry - Tập 4 - Trang 92-110 - 2006
The sustainable development and consumption need more efficient use of natural resources. As a consequence, the use of industrial solvents demands their recovery instead of end-of-pipe treatment. It is not always clear, however, which treatment alternative should be applied. Based on an industrial case study, the environmental and economic evaluation and comparison of the treatment alternatives of......
Two-step synthesis of high aspect ratio gold nanorods
Central European Journal of Chemistry - Tập 4 - Trang 160-165 - 2006
We describe a very simple, two-step synthetic method to prepare gold nanorods with extremely high aspect ratios (> 20) and average lengths of more than 1000 nm. The method is based on a seed-mediated growth in presence of the surfactant cetyltrimethylammonium bromide. The length and aspect ratios of the nanorods can be manipulated by varying the surfactant concentration.
A computational investigation of carbon-doped beryllium monoxide nanotubes
Central European Journal of Chemistry - Tập 10 - Trang 96-104 - 2011
To investigate the influence of C-doping on the electrostatic structure properties in the frame work of density functional theory (DFT), we considered beryllium monoxide nanotubes (BeONTs), consisting of 60 Be and 60 O atoms. Full geometry optimizations are performed for all structures, i.e., all atoms are allowed to relax. Afterwards, the chemical shielding (CS) tensors are calculated for Be-9, O......
1,3-bis(2,4,6-trinitrophenylaminooxy)propane and its 4-cyano-2,6-dinitrophenyl congener: Synthesis and properties
Central European Journal of Chemistry - Tập 1 - Trang 53-64 - 2003
Starting from N-hydroxyphthalimide (5) and 1,3-dibromopropane (6) we obtained 1,3-bis(phthalimidooxy)propane (7) which led to 1,3-bis(aminooxy)propane dihydrochloride (8). From its reaction with picryl chloride or 4-cyano-2,6-dinitrochlorobenzene, the two title compounds (4b, 4a) were obtained.
1H-NMR and 13C-NMR spectra are presented. For comparison with the analogous N-m......
Uranium (VI) adsorption equilibrium on purolite resin SGA 600 U/3472
Central European Journal of Chemistry - Tập 12 - Trang 769-773 - 2014
This paper characterizes uranium (VI) sorption from synthetic solutions using a fixed bed Purolite resin SGA 600 U/3472 system. The effect of the sulphate anion presence in the liquid phase on sorbtion dynamics and equilibrium is analysed. In the industrial processing of solutions obtained from leaching of uranium ore (alkaline/acid), in a continuous system, there are several compounds which stron......
The role of hydroxy aluminium sulfate minerals in controlling Al3+ concentration and speciation in acidic soils
Central European Journal of Chemistry - Tập 12 - Trang 877-885 - 2014
A thermodynamic approach for the complex chemical equilibria investigation of two-phase systems containing hydroxy aluminium sulfate (HAS) minerals in soils has been developed. This approach utilizes thermodynamic relationships combined with original mass balance constraints, where the HAS mineral phases are explicitly expressed. The factors influencing the distribution and concentrations of vario......
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