Di-urea cross-linked POE/siloxane hybrid ormolytes (di-ureasils) doped with a wide concentration range of lithium perchlorate trihydrate (LiClO4·3H2O) (200 ≥ n ≥ 0.5, where n expresses the salt content in terms of the number of ether oxygen atoms per Li+ ion) have been analysed by Fourier tra...

Poly[(vinylidene fluoride)-co-trifluoroethylene] membranes doped with different lithium perchlorate trihydrate contents have been produced by solvent evaporation at different temperatures in order to tailor membrane morphology and characterized by infrared spectroscopy, thermal and mechanical an...

In this study, the effect of sodium halide salts including Sodium Fluoride, Sodium Iodide, Sodium Bromide, and Sodium Chloride was investigated on the kinetics of tetrahydrofuran hydrate formation by using a differential scanning calorimetry setup. It was found that the anions of salts can destr...

The hydration process of lithium iodide, lithium bromide, lithium chloride and lithium nitrate in water was analyzed quantitatively by applying multivariate curve resolution alternating least squares (MCR-ALS) to their near infrared spectra recorded between 850 nm and 1100 nm. The experiments we...

This work is part of a larger study dedicated to an inter-seasonal heat storage process based on novel absorption pump operated in two half-cycles that uses LiBr/H2O as the absorbent/absorbate couple. The solar energy is stored during summer through desorption, and the heat is released during wi...

The ambient pressure devitrification of glassy lithium metaborate has been studied by Raman and infrared spectroscopies. Of the three different polymorphs obtained, two are identified as α- and γ-LiBO2, while a third one, β′-LiBO2, is thought to consist of alternating borate triangles and te...

Lithium metaborate-metaaluminate glasses xLiAlO2·(1−x)LiBO2, (0≤ x ≤0.42), and crystals (Li3B2AlO6, Li2BAlO4) have been prepared and studied by infrared and Raman spectroscopies. The two crystalline compounds have similar networks made of AlØ4− and BØ2O− units (Ø, O: bridging and terminal oxy...

ATR infrared spectroscopy is used to study the structure of lithium metaborate-lithium fluoride composite thin films. The variation of the principal spectral characteristics of the composite is explained by the transformation of the tetra-coordinated in tri-coordinated boron groups. The ionic co...

An improved lithium metaborate fusion technique for inductively coupled plasma mass spectrometric analysis of felsic rocks is proposed. The method involves the dissolution of fused sample material with HF followed by treatment with HNO3. The decomposition method developed was used for the determ...

Materials containing a significant silicate matrix are often considered for element analysis by the PIXE method. In some circumstances such materials may not be conveniently prepared for sample analysis. It has been found that a lithium metaborate fusion-acid dissolution procedure works well for...

Reaction steps and mechanisms of the thermal dehydration of lithium metaborate dihydrate were investigated by means of thermoanalytical measurements, high temperature powder X-ray diffractometry, FT-IR spectroscopy, and microscopic observations. The first half of thermal dehydration was characte...

SummaryObjectiveTo assess the diagnostic performance of ultrasound (US) for calcium pyrophosphate deposition (CPPD) at the level of menisci, hyaline cartilage (HC), tendons, and synovial fluid (SF) of the knee, and to examine inter- and intra-observer reliability.

Fluorescent carbon dots (CDs) have been a promising star in analytical and environmental fields. Present study designed a new bright-blue fluorescent carbon dots with sodium citrate and polyacrylamide by a hydrothermal method. The obtained CDs had an average diameter of 2.4 nm and exhibited exci...

In this work, we reported a di-nuclear Cu(II) complex bearing double guanidinium arms for sensing pyrophosphate (PPi) with high selectivity and sensitivity. Using pyrocatechol violet (PV) and esculetine as colorimetric and fluorescent indicators respectively, the copper complex-indicator ensembl...

A polyligand citrate-pyrophosphate electrolyte is proposed, which makes it possible to obtain uniform bright coatings containing 15–40 at.% Re and 10–4 at.% W and a current efficiency of up to 93% depending on the concentration of potassium perrhenate in the solution. The dependence of the che...

The hydration behaviour of calcium pyrophosphate (CPP) was investigated via Density Functional Quantum mechanical calculations (DFT), carried out on isolated monomeric CPP-water complexes. Formation free energies for the first hydration shell shows that hydrates from the di- to octa-hydrate are ...

Surface-enhanced Raman scattering (SERS) is one of the most sensitive methods for the detection of adsorbed molecules on the nanostructured coinage-metal surface. The enhancements in the order of 104–106 are routinely observed. Such an effect makes SERS spectroscopy a technique applicable to th...

Crystalline lead–pyrophosphate precursor was prepared in aqueous solution from lead nitrate and phosphoric acid and characterized by X-ray diffraction, thermogravimetry and Raman scattering. This crystalline lead–phosphate was then used to prepare glass samples in the binary system Pb2P2O7–WO...

The interaction of lead(II) perchlorate hydrate with Schiff base ligands resulted in the formation of unexpected complexes wherein the ligand is coordinated in an “innocent” fashion. These compounds were characterised by 1H NMR, IR and single crystal X-ray studies. These reveal an unprecedente...

Reactivity is of great importance for metal oxide nanoparticles (MONP) used as catalysts and advanced materials, but seeking for higher reactivity seems to be conflict with high chemical stability required for MONP. There is direct balance between reactivity and stability of these MONP. This cou...