Water assisted phase transformation process from crystalized AlPO4-5 to AlPO4-tridymite was studied by the combination of X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and in situ multinuclear MAS NMR. It is found that water first activates the residue amorphous aluminophosphate in...

Cristobalite and tridymite are the main SiO2 phases in silica bricks, a widespread refractory product. The elastic properties of cristobalite at room temperature have been extensively studied, because it is known for auxetic behavior, i.e. negative Poisson ratios, whereas the elastic properties ...

Temperature-induced phase transitions for stuffed tridymite AGa2O4 (A = Sr, Ca) were investigated by experimental and theoretical calculations. A simple annealing of SrCO3 and Ga2O3 led to the formation of γ-SrGa2O4 (P21/n) below 1200 °C, and transform to β-SrGa2O4 (P21/c) when heated at 1200...

We demonstrate a new modulation for a high-temperature polymorph of BaSrFe4O8 via synchrotron powder X-ray diffraction and transmission electron microscopy (TEM) experiments. Although the powder X-ray diffraction pattern was successfully analyzed using a structure model of space group Pnna, an u...

BaAl2O4 is a stuffed tridymite used as a long-lasting phosphor. The thermoluminescence of BaAl2O4 prepared by solution-combustion is reported. Analysis of the sample using X-ray diffraction shows that it formed as a single phase compound with a hexagonal structure following annealing at 1200 °C...

Polyvinyl alcohol nanocomposite containing immobilized [Mn(Br4TPP)OAc] complex on bio inspired copper oxide was prepared by an electrospinning method ([email protected]). This novel heterogeneous biocatalyst based on Carthamus tinctorius plant was characterized by TEM, SEM, AFM, EDAX, elemental ...

The rate coefficients for the reactions of OH radicals and Cl atoms with 3-methoxy-1-propanol (3-M-1-POL) and 3-methoxy-1-butanol (3-M-1-BOL) in the gas-phase have been measured at (298 ± 2) K and atmospheric pressure. A conventional relative-rate technique was used to determine the rate coeffi...

In this work some thermophysical properties: molar volume, molar refraction and isentropic compressibility changes of mixing at 298.15 K and isobaric vapour–liquid equilibrium at 101.32 kPa, were determined for the 1-butanol+ethanol+2-methoxy-2-methylbutane system. Several equations were applie...

Consistent vapour–liquid equilibrium (VLE) data at 101.32 kPa have been determined for the ternary system 1-butanol+methanol+2-methoxy-2-methylpropane, correlated by means of the Wilson, NRTL, and UNIQUAC equations, and compared with the results predicted by using the same equations with intera...

To examine the effect of organic/inorganic solutes on the properties of cloud condensation nuclei and other atmospheric aerosols, the surface tension of various mixtures including dicarboxylic acids, ammonium sulfate, d-glucose, and humic acid sodium salt (NaHA) was measured at 20 °C using the ...

The series of ionic liquids based on triethanolammonium salts of dicarboxylic acids (oxalic, malonic and succinic) was synthesized, characterized by IR and H1, C13 NMR spectroscopy, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Their structure was determined by si...

An efficient and direct approach was developed for the synthesis of α,β-dehydroamino acid derivatives with a broad range of substrates. Amido-substituted Malonic Acid Half Oxyesters (MAHOs) have proven to be excellent partners of various aromatic aldehydes in the presence of secondary amine, t...

High catalytic activities (TOF = 3000 h−1) have been achieved by novel water-soluble ruthenium catalysts modified with nitrogen-containing ligands such as the bathophenanthrolinedisulfonic acid disodium salt (BPhDS) in the hydrogenation reaction of the renewable polar platform chemical levulinic...

A self assembled monolayer of cysteamine was prepared on the surface of gold disc electrode and further modified with nitrilotriacetic acid. Modified electrode was characterized with cyclic voltammetry and electrochemical impedance spectroscopy in presence of potassium hexacyanoferrate(II)/(III)...

This study characterizes the Cu-Sn-Zn electrodeposits produced potentiostatically from baths containing different concentrations of Cu2+, Sn2+ and Zn2+ ions and 0.60 M trisodium nitrilotriacetic (NTA) at pH 4.99 (higher stability). Ternary electrodeposits were produced onto AISI 1010 steel subst...

The complexing agents co-diposed in nuclear waste must be studied as possible responsible for the solubilization and transport of radionuclides in the environment. The importance of these complexing agents will depend on the sources, the impacted environment and the concentrations of metals and ...

A lock solution composed of gentamicin sulfate (5 mg/mL) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na2, 30 mg/mL) could fully eradicate in vivo bacterial biofilms in totally implantable venous access ports (TIVAP). In this study, fabrication, conditioning and sterilization processe...

Dimethyl phthalate (DMP), a phthalate ester (PAE), is a ubiquitous and organic pollutant. In this study, the toxicity of DMP to Escherichia coli K12 and its underlying mechanism were investigated. The results showed that DMP inhibited the growth of E. coli K12 and induced cell inactivation and/o...

A straightforward single pot reaction of N-methylaryl-N-methylferrocenyl amine (L1-L3), CS2 and M(OAc)2 in Et3N at room temperature led to the formation of [M{κ2S,S–S2CN(CH2R)CH2Fc}n] {M = CoIII, R = 1-naphthyl, (1), 3-pyridyl (2), 2-furyl (3); M = NiII, R = 1-naphthyl, (4), 3-pyridyl (5), 2-f...

Aryl (4-methoxyphenyl and 2-naphthyl) and hetaryl (2-furyl, 3-pyridyl, and 2-thienyl) 3-methyl-2-quinoxalinyl ketones were prepared via the reaction of benzofurazan 1-oxide (BFO) with 1-aryl- and 1-hetaryl-butane-1,3-diones, followed by reduction of the resulting aryl or hetaryl 3-methyl-2-quino...