160 Result(s)
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Article
Ben Ep**er
Analytical Chemistry
Physical Chemistry
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Article
Synthesis and spectral properties of mixed binuclear complexes derived from the ion pentacyano(4,4′-bipyridine)ferrate(II)
New complex analogous to Prussian Blue were synthesized both in solid phase and in aqueous solution by mixing the sodium salt of pentacyano(4,4′-bipyridine)-ferrate(II) with Cu(II) and Fe(III) salts. Infrared ...
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Article
Etude du diagramme d’equilibre du systeme NaPO3−Pr(PO3)3
The NaPO3−Pr(PO3)3 system was studied by microdifferential thermal analysis (DTA), IR and X-ray diffraction spectroscopies. The only new compound observed in the system is NaPr(PO3)4, which melts incongruently at...
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Etude de phosphates condenses diagramme d’equilibre du systeme AgPO3−Pr(PO3)3 Données sur AgPr(PO3)4
The AgPO3−Pr(PO3)3 system has been studied for the first time by differential thermal analysis, X-ray diffraction and IR spectroscopy. The system shows one compound AgPr(PO3)4 which melts in a peritectic decompos...
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Article
Sol-gel preparation and fluorine substitution of BiSCCO high-T c superconductors
Sol-gel citrate technology was used to prepare BiSCCO 2223 and 2212 superconducting phases. Fluorine in the initial mixture was shown to enhance considerably formation of the 2223 phase. Fluorine substitution ...
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Article
Solid-Liquid Equilibria of the Ternary System Na+, Mg++ // Cl--H2O at 10°C
The isothermal section at 10°C of the solubility diagram of the ternary system Na+, Mg++// ClH2O was established by conductimetric and analytical measurements.
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Thermodynamic Study of the Solid-Liquid Equilibria in the Systems MIPO3-Pr(PO3)3 (MI=Na, Rb, Cs OR Ag)
A previously established equation of a stoichiometric phase liquidus curve was applied to determination of the phase diagrams of the systems MIPO3-Pr(PO3)3 (with MI=Na, Rb, Cs or Ag).
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Article
Dissolution De L'hydroxyapatite et Du Phosphate Tricalcique β Dans Les Solutions D'acide Nitrique
Using an isoperibol calorimeter for rapid reactions and a Calsol type microcalorimeter for slow processes, are applied to determine the enthalpies of solution of two synthetic phosphate products in nitric acid...
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Article
Synthesis and Thermal Behavior of the Hydrogen Praseodymium Diphosphate (HPrP2O7·3H2O)
The preparation of a new acid lanthanide diphosphate is reported. The acid praseodymium diphosphate, obtained as a trihydrate salt, is investigated by chemical analysis, X-ray powder diffraction and IR spectro...
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Article
Enthalpie De Formation Et De Melange De Phosphoapatites Calco-Cadmiees Chlorees
Calcium–cadmium chlorapatites solid solutions with the general formula Ca10–xCdx(PO4)6Cl2,1≤x≤10, were prepared by solid state reaction and characterized by X-ray diffraction, infrared spectroscopy and chemical a...
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Experimental Determination of the Isotherm at 15°C of the System Mg2+/Cl−, SO4 2–H2O
The diagram of the ternary system Mg2+/Cl−, SO4 2−–H2O was established at 15°C by means of analytical and conductimetric measurements. Three compounds were found in this diagram, which are MgSO4·6H2O, MgSO4·7H2O...
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Article
Enthalpie de formation de la whitlockite Ca18Mg2H2(PO4)14
Pure and well crystallised whitlockite Ca18Mg2H2(PO4)14 has been synthesized by precipitation from the magnesium and calcium nitrates and the diammonic phosphate. The product of the reaction has been characterize...
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Article
Study on Gd3+ and Sm3+ co-doped ceria-based electrolytes
Doped ceria electrolytes of Ce1-aGda-ySm y O2–0.5a, wherein a=0.15 or 0.2, and 0≤y≤a, were prepared with the citrate method, and characterized by inductively coupled plasma–atomi...
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Article
Irreversibilities in two configurations of the double generator absorption chiller
This paper deals with the modeling, thermodynamic analysis and comparison of irreversibility in two configurations of the double generator absorption chiller. First a computer simulation model is developed for...
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Article
Calcium hydroxyapatite solubilisation in the hydrochloric and perchloric acids
Enthalpy of solution of calcium hydroxyapatite Ca10(PO4)6(OH)2 (CaHap) in hydrochloric and perchloric acid solutions is measured by an isoperibol calorimeter and a C80 microcalorimeter. The former device is adapt...
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Article
Solid-liquid phase equilibria of binary salt hydrate mixtures involving ammonium alum
The solid-liquid phase diagrams of binary mixtures of ammonium alum with ammonium iron(III) alum, with aluminum nitrate nonahydrate and with ammonium nitrate and of aluminum sulfate hexadecahydrate with alumin...
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Article
GPCRs as therapeutic targets: a view on adenosine receptors structure and functions, and molecular modeling support
G-protein-coupled receptors (GPCRs) represent the largest known family of signal-transducing proteins and transmit signals for light and many extracellular regulatory molecules. GPCRs are dysfunctional or dysr...
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Article
Constant transformation rate thermal analysis of HGdP2O7·3H2O
The aim of this work is the optimization of the preparation of anhydrous gadolinium hydrogen phosphate with good fluorescence properties. The products obtained by dehydration of gadolinium hydrogen phosphate t...
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Article
Synthesis and electrochemical properties of spinel LiMn2O4 prepared by the rheological phase method
Pure-phase and well-crystallized spinel LiMn2O4 powders were successfully synthesized by a simple rheological phase method. The thermal behavior and structure properties of the powders prepared by the rheological...
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Article
Synthesis and characterization of a new sulfate K4H2(SO4)3
The formation of a new sulfate compound K4H2(SO4)3 is obtained by evaporation at 25°C of an aqueous solution, which was formed by a mixture of K2SO4 and H2SO4. The characterization of this solid is carried out by...
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Thermodynamic exploitation of the liquidus curves in the MIPO3–Pb(PO3)2, MIPO3–Cu(PO3)2 and MIPO3–Ce(PO3)3 systems (M I=Li, Na, K, Rb, Cs, Ag, Tl)
The thermodynamic exploitation of the solid–liquid equilibria in the MIPO3–Pb(PO3)2, MIPO3–Cu(PO3)2 and MIPO3–Ce(PO3)3 systems (with M I=Li, Na, K, Rb, Cs, Ag, Tl) is carried out using a semi-empi...
