Adsorptive desulfurization is a greenway for the sulfur removal from fossil fuels owing to their ambient operating conditions and its recyclable usage. N-doped carbon has been used as adsorbents for the removal of sulfur both in the gas phase and liquid phase. In this paper, the bifunctional mes...

Tetrabromobisphenol A (TBBPA) and copper (Cu) are the main pollutants at e-waste recycling sites and the effects of their biotoxicity on microorganisms have drawn extensive attention. Nitrate-based bioremediation has been applied to organic pollutant-contaminated sediments since nitrate is a fav...

Retention of cesium in yttria stabilized zirconia (YSZ) was studied experimentally and discussed on the basis of its solubility estimated on a thermodynamic basis. The retention was investigated experimentally by determination of the temperature dependence of diffusion and the cesium release. Ce...

The behaviour of caesium in nuclear fuels is investigated using density functional theory (DFT). In a first step, the incorporation and solution energies of Cs in pre-existing trap sites of UO2 (vacancies, interstitials, U–O di-vacancy and Schottky trio defects) are calculated using the project...

The standard enthalpies of formation of the alkali metal zirconates have been estimated using a general parameterization scheme. Details of the calculations are presented. The results are in very good agreement with the available experimental data. The entropies of formation of these compounds h...

Cesium ions were implanted at the energy of 300 keV in YSZ at 300 and 1025 K, with increasing fluences up to 5 × 1016 cm−2. Concentration profiles were determined by Rutherford Backscattering Spectrometry (RBS) measurements. Transmission Electron Microscopy (TEM) experiments were achieved to de...

This study was performed on γ-irradiated ethylene-propylene diene terpolymer (EPDM) loaded with lead zirconate titanate. The inorganic phase has a perovskite structure with general formula Pb(Zr0.65−xCexTi0.35)O3. The three composites with different Ce dopant concentrations revealed the stabili...

The low-temperature heat capacity of Cs2ZrO3was measured fromT=5 K toT=393 K. For the standard molar entropy atT=298.15 K, a value of (199.2±0.8) J·K−1·mol−1was found. The enthalpy increment of Cs2ZrO3was measured fromT=542 K toT=703 K using drop calorimetry. Using these results, a thermodyna...

Cesium modified sodium zirconate (Cs-Na2ZrO3) was prepared by ionic exchange from sodium zirconate (Na2ZrO3), which was synthesized via a solid state reaction. Both ceramics, i.e., pristine Na2ZrO3 and the Cs-Na2ZrO3, were used as basic heterogeneous catalysts in biodiesel production. Soybean an...

A new reduced tantalate, Na2Ca2Ta3O10, with layered perovskite structure was synthesized by an intercalation reaction from the parent sodium compound, NaCa2Ta3O10. The crystal structures of these compounds were determined by the Rietveld analysis of powder X-ray diffraction pattern. Although the...

Terbium activated yttrium tantalate (YTaO4:Tb) samples were prepared by solid-state reaction from homogeneous mixtures of Y2O3 and Ta2O5 for host-lattice formation, Tb4O7 or Tb(NO3)3·5H2O as activator source and Li2SO4, Na2SO4, CsF, Na4P2O7 or Na2B4O7 as flux. Photoluminescence (PL) measurement...

Silver tantalate coatings were produced by reactive unbalanced magnetron sputtering from silver and tantalum sources as potential high temperature solid lubricants. The films were wear-tested at 750 °C under normal loads of 1, 2, 5, or 10 N against a Si3N4 counterface. These sliding tests revea...

3- and 4-[(Azulen-1-yl)-azo]-azo-benzenes were obtained in good yields using the buffered coupling reaction between several alkyl-substituted azulenes and diazotized phenylazo-phenylamines in dichloroacetic acid. The coupling products were characterized and the recorded electronic spectra are di...

Bis aromatic diazenes which possess either two identical or two different azulene-1-yl groups substituted at either 1,3 or 1,4-positions in the bridging phenylene moiety were synthesized in good yield via diazotization of the 3- or 4-azulen-1-ylazo-phenylamines followed by coupling with azulene ...

Azulen-1-yl-benzothiazol-2-yl diazenes substituted at thiazole and/or at azulene moiety have been prepared by diazotization of the corresponding benzothiazol-2-ylamines in inorganic acid mixtures or dichloroacetic acid followed by diazonium salts' coupling with azulenes. The nitrosyl sulfat...

Complexing polymer-coated electrodes have been synthesized by oxidative electropolymerization of 4-azulen-1-yl-2,6-bis(2-thienyl)pyridine (monomer L). The novel chelating chemically modified electrodes were used for the electrochemical detection of Pb(II) and Cd(II) ions by means of the chemical...

Electrochemical behaviour and electropolymerization of 4-azulen-1-yl-2,6-bis(2-thienyl)pyridine (L) has been studied. Complexing polymer-coated electrodes have been synthesized by oxidative electropolymerization of L in acetonitrile solutions containing 0.1 M tetrabutylammonium perchlorate. The ...

The determination of pH values at the equivalence (isosbestic) point from the electronic spectra of several azulen-1-yl-thiazol-2-yl diazenes allowed the obtaining of their pKa values. All the studied compounds are very weak bases. The pKa values were correlated with the diazenes structure. The ...

Interactions of select boric acid derivatives with β-cyclodextrin were investigated. All products were obtained employing the grinding-induced mechanochemical approach. It was found that phenylboronic acid, benzoxaborole and boric acid form non-covalent, hydrogen bonding-based systems with β-c...

In this study, a new and sensitive signal-off electrogenerated chemiluminescence (ECL) biosensing method for the quantification of 5-hydroxymethylcytosine in DNA (5-hmC-DNA) was developed. The method achieved simple and sensitive detection of 5-hmC-DNA based on the glycosylation of 5-hmC, combin...