Among industrial applications of CO2, the formation of cyclic carbonates from epoxides offers relevant chemical potentialities. Here, various N,N-dimethyl-N-cetyl-N-(2-hydroxyethyl)ammonium salts (HEA16X) associated with different counter-anions (X−) have been investigated as catalysts of the cy...
Packaging of structurally sensitive biomolecules such as proteins, peptides and DNA in non-aqueous media at ambient conditions with chemical and structural stability is important to explore the potential of such biomacromolecules as substrate for functional biomaterial design and for biotechnolo...
We herein describe the results of further evolution of glycogen synthase kinase (GSK)-3β inhibitors from our promising compounds containing a 2-phenylmorpholine moiety. Transformation of the morpholine moiety into a piperazine moiety resulted in potent GSK-3β inhibitors. SAR studies focused on...
A series of novel aralkyl piperazine derivatives were synthesized, and evaluated for their serotonin reuptake inhibitory and 5-HT1A/5-HT7 receptors affinities activity. Antidepressant activities in vivo of the compounds were screened using the forced swimming test (FST) and tail suspension test ...
A series of 1,4-substituted arylalkyl piperazine derivatives were synthesized and studied with the aim to obtain potent P-gp-dependent multidrug-resistant (MDR) reversers. The new compounds were designed on the basis of the structures of our previous arylamine ester derivatives endowed with high...
In this Letter, we report the structure–activity relationship (SAR) studies on series of positional isomers of 5(6)-bromo-1-[(phenyl)sulfonyl]-2-[(4-nitrophenoxy)methyl]-1H-benzimidazoles derivatives 7(a–j) and 8(a–j) synthesized in good yields and characterized by 1H NMR, 13C NMR and mass sp...
In the present study, the solvent extraction of cerium (IV) from sulfate medium was investigated by Cyanex 272 and 301. The main objective was to increase our understanding of the behavior of analogous extractants, but different in donor atom, which were achieved by batch and kinetics investigat...
There are limited studies available on titanium salt flocculation. In this research, coagulation experiments of titanium sulfate were conducted using both distilled water and kaolin clay suspension. Results showed that titanium sulfate flocculation was most effective in the pH range 4–6, and ne...
The property of phosphorus (P)-doped titanium(IV) oxide (TiO2) films prepared using phosphide was compared with that of nitrogen (N)-doped TiO2 films prepared using nitride. X-ray diffraction analysis showed that the crystallite size of P-doped TiO2 film was larger than that of N-doped TiO2 film...
A novel, monomeric species containing a tetra-titanium(IV) oxide cluster and one coordinated sulfate ion grafted on a di-lacunary Keggin polyoxometalate (POM), [[{Ti(H2O)3}2{Ti(H2O)2}2(μ-O)3(SO4)](PW10O37)]− 1, was derived from reactions of Ti(SO4)2 with two precursors, i.e., [(α-1,2-PW10Ti2O3...
A novel treatment for removing As from a Cu electrolyte using titanium(IV) oxysulfate coprecipitation and carbothermal reduction is investigated. Experimental results show that under the conditions of an agitation speed of 200 r·min-1, a Ti:As molar ratio of 1.5, a processing time of 60 min at ...
In the system XeF6VF5 two new compounds XeF6.VF5 and XeF6.2VF5 have been synthesized, in addition to the already known 2XeF6.VF5 (1). The Raman spectra indicate that ionic character decreases in the series 2XeF6.VF5, XeF6.VF5 and XeF6.2VF5. The compound 2XeF6.VF5 can be described as an ionic c...
Raman spectra of XeF4 and XeF6 in the nonaqueous HF solutions at various concentrations and vibrational spectra of the [XeF5]+ cation in the solid state and in the HF solutions over a wide range of vibrational frequencies have been studied. The assignments of the observed vibrational bands of th...
Accurate Rayleigh scattering cross sections are important for understanding the propagation of electromagnetic radiation in planetary atmospheres and for calibrating mirror reflectivity in high finesse optical cavities. In this study, we used Broadband Cavity Enhanced Spectroscopy (BBCES) to mea...
The reactions of some hydrazinium fluorouranates and some ammonium fluorouranates with excess xenon difluoride or xenon hexafluoride were studied.The reactions between hydrazinium fluorouranates and xenon difluoride proceed via ammonium fluorouranates to binary metal fluorides, with the uranium ...
We have investigated sulphur hexafluoride as a stripper gas in tandem accelerators by using the ANTARES accelerator system at ANSTO to measure charge state distributions for this gas. Results are reported at 4 MV terminal voltage for injected negative ions ranging from carbon to uranium oxide. F...
The detection of radioactive noble gases is a primary technology for verifying compliance with the pending Comprehensive Nuclear-Test-Ban Treaty. A fundamental challenge in applying this technology for detecting underground nuclear explosions is estimating the timing and magnitude of the radionu...
According to single crystal X-ray diffraction, neutron powder diffraction, solid state MAS NMR data, and differential scanning calorimetry, XeF6 exists in at least six different modifications. Three of them are formed at temperatures above room temperature, one exists at room temperature, while ...
Methods are described for the preparation and release of sulphur hexafluoride (SF6) and 3He to surface sea water for studies of gas exchange and as oceanographic tracers. Known amounts of the tracers (0.28 mol SF6 and 0.05 mol 3He, measured by gas chromatography with thermal conductivity detecti...
We present a nanofabrication process for producing tungsten zone plates used in hard X-ray applications including a method of integrating a high-energy absorbing central stop with the optic. Tungsten zone plates are structured with electron-beam lithography and subsequent reactive ion etching. T...
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