Labovský, Juraj Švandová, Zuzana Markoš, Jozef Jelemenský, L’udovít
Published in
Chemical Papers
A methodology for hazard investigation based on the integration of a mathematical model approach into hazard and operability analysis is presented. This approach is based on mathematical modelling of a process unit where both steady-state analysis, including analysis of the steady states multiplicity and stability, and dynamic simulation are used. ...
Gmurek, Marta Miller, Jacek
Published in
Chemical Papers
Photodegradation of endocrine disrupting butylparaben (BP) in aerated aqueous solutions was studied using 4,4′,4″,4‴-(porphine-5,10,15,20-tetrayl)tetrakis(benzenesulphonic acid) (TPPS4), as a sensitiser. Influence of various parameters, such as initial sensitiser and BP concentration, pH of the reaction solution and oxygen content in the reaction s...
Fouda, A. Al-Sarawy, A. El-Katori, E.
Published in
Chemical Papers
The dissociation constants of 3-methyl-1-phenyl-{p-[N-(pyrimidin-2-yl)sulfamoyl]phenylazo}-2-pyrazolin-5-one and metal-ligand stability constants of its complexes with some transition metal ions have been determined potentiometrically in 0.1 M-KCl and ethanol—water mixture (30 vol. %). The order of the stability constants of the formed complexes in...
Kortišová, I. Foltínová, P. Halgaš, J.
Published in
Chemical Papers
Condensation of quaternary 2-methylbenzothiazolium bromides with 5-(dialkylamino)furan-2-carbaldehydes afforded a series of new thiacyanine analogs. The compounds exhibit significant activities against several bacterial, yeast, and mould strains. Derivatives with dipropylamino substituents showed higher inhibitory effects than those with cyclic sec...
Ondrejovič, G. Kotočová, A.
Published in
Chemical Papers
The tetranuclear Cu4OBrnCl(6-n)L4 complexes, where L = 3-methylpyridine (3-Mepy), 4-methylpyridine (4-Mepy) and n=0–6 with trigonal bipyramidal coordination of copper(II) were prepared and their infrared and electronic absorption spectra as well as cyclic voltammograms in nitromethane solutions were measured. The polyhedra in Cu4OBrnCl(6−n) (3-Mepy...
Svoboda, K. Baxter, D. Martinec, J.
Published in
Chemical Papers
EU energy and environmental policy in waste management leads to increasing interest in developing methods for waste disposal with minimum emissions of greenhouse gases and minimum environmental impacts. From the point of view of nitrous oxide (N2O) emissions, waste incineration and waste co-combustion is very acceptable method of waste disposal. Tw...
Berek, D.
Published in
Chemical Papers
A novel liquid chromatographic procedure is presented. It is based on differences in the transport velocities of the fast-moving, pore-excluded macromolecules and slow-progressing, pore-permeating small molecules of an auxiliary liquid. A barrier of small molecules selectively decelerates certain kind of macromolecules while other kind remains unhi...
Rúriková, D. Kudravá, M.
Published in
Chemical Papers
Two single-step extraction procedures validated by BCR, extraction with 0.43 mol dm−3 acetic acid and 0.05 mol dm−3 EDTA, are used for assessing bioavailable species of Pb and Cd in soils. After an extensive study of interferences of humic substances and using standard additions procedures, the extractable contents of Pb and Cd have been determined...
Malík, I. Sedlárová, E. Csöllei, J. Andriamainty, F. Kurfürst, P. Vančo, J.
Published in
Chemical Papers
The phenylcarbamic acid derivatives with N-phenylpiperazine moiety in the molecule have been prepared. The structure has been confirmed by elemental analysis, IR, 1H NMR, and mass spectral data. For the prepared set of the compounds the lipophilicity parameters have been determined. The experimentally obtained lipophilicity parameters have been cor...
Sahmetlioglu, E. Mart, H. Yuruk, H. Surme, Y.
Published in
Chemical Papers
The synthesis of a new epoxy resin of oligosalicylaldehyde by the reaction with epichlorohydrin is reported. New resin’s epoxy value and chlorine content were determined and found to be 25% and 1%, respectively. The characterization of the new resin was instrumented by FTIR, 1H NMR, scanning electron microscopy, and thermal gravimetric analyses. TG...