Materials Literature
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An ethanolic extract of Parsley, Petroselinum crispum (Mill.) Nym.ex A.W. Hill (Umbelliferae), was tested for its ability to inhibit gastric secretion and to protect gastric mucosa against the injuries caused by pyloric ligation, hypothermic restraint stress, indomethacin and cytodestructive agents (80% ethanol, 0.2 M…
The adsorption, dissociation and reaction of NO with CO have been investigated on supported Au catalysts. The main method was FTIR spectroscopy. Although very limited dissociation of NO was observed on reduced Au catalyst, catalytic tests showed that all the samples used effectively catalyse the NO + CO reaction above…
ment time, nature and flow rate of the gas, and plasma power have been varied. In order to establish the chemical effect of plasma treatment on cotton fibres the following tests have been performed: Cuprammonium fluidity test, weight loss measurement, determination of carboxyl groups, carbonyl group identification, FT…
In this communication we demonstrate high temperature proton conduction in the phase La(1-x)Ba(1+x)GaO(4-x/2), with conductivities significantly higher than reported for other phases containing tetrahedral ions, such as doped LaPO4.
We have researched and developed a new Heusler-type ferromagnetic shape memory alloy Co2NiGa, which has large magnetostriction caused by the magnetic-field-induced re-arrangement of martensite twin. The ribbon samples produced by rapid-solidification melt-spinning method show strong texture and large magnetostriction…
Oxide films formed on Type 316L (UNS S31603) stainless steel (SS), Alloy 600 (UNS N06600), and Alloy 690 (UNS N06900) in high-temperature aqueous environments of pH 5, 8, and 10, which represent possible situations created in the secondary circuit of pressurized water nuclear reactors, were examined by scanning electr…
Abstract The viscosity of uncompatibilized polymer blends often shows a negative deviation from a log‐additivity rule at shear rates relevant to processing. This deviation has been attributed to interfacial slip, which is related to the loss of entanglements at the interface. In this work interfacial slip and the effe…
The materials processing, consisted of a four step process of solution treatment, pre-strain, overaging and hot working, was developed for attaining structural stability at high temperatures in a commercial Mg–Zn–Zr alloy, ZK60. The grain size of the material processed by this schedule was refined to 2.5 μm, and the m…
A perovskite Bi(Ni 1/2 Ti 1/2 )O 3 was successfully synthesized under high pressure 6 GPa. This compound has orthorhombic cell with the parameters, a = 2 a m sin( g /2) = 0.5626(2) nm, b = 4 b m = 1.5681(6) nm, and c = 2 c m cos( g /2) = 0.5548(2) nm containing eight monoclinic primitive perovskite unit with the param…
The reaction between C3H8 and N2O over steam-activated FeMFI zeolites leads to high yields towards propene (24%) and propionaldehyde (6%) at 773-798 K.
Poly-beta-hydroxybutyrate (PHB) biosynthesis in Ralstonia eutropha from gluconate as a carbon source is carried out through the Entner-Doudoroff (ED) pathway and the pentose-phosphate (PP) pathway generating NADPH and glyceraldehyde-3-phosphate that flows to acetyl-CoA, actively in the unbalanced PHB accumulation phas…
The effect of defect structure on the electrical conductivity for Eu-doped was studied in a reducing range of A defect model was derived and verified by computational simulation against both electrical conductivity data and Brouwer-type defect equilibria. At higher temperatures, part of the conductivity was due to oxy…
was deposited by electrochemical precipitation in hard waters of various compositions. In situ Raman spectra of were recorded during the formation of the nuclei. The distinction between the three polymorphs (calcite, vaterite, and aragonite) combined with electrochemical and quartz crystal microbalance measurements al…
The influence of the alkalinity of the support on the chemisorption of oxygen on Pt particles has been studied using Pt L3 and L2 X-ray absorption near edge data from Pt/Al2O3 doped with F or Rb. The O binding site is determined by using a procedure similar to that previously utilised for H chemisorption. The Pt L3 X-…
Since the first demonstration of organic photovoltaic devices much progress has been made. Organic solar cells reach now power conversion efficiencies of up to 3% over the solar spectrum. The morphology of the active film is very important for efficient devices. Films spin-coated from blend solutions phase separate. T…
The electrocatalytic activity of various adsorbed metallophthalocyanines (M-Pc) on vitreous carbon electrode for the oxidation of nitric oxide has been investigated in an aqueous phosphate buffer solution (pH 7.3). When comparing phthalocyanines of different metals, the influence of the nature of the metal on the acti…
A novel metallic monolith support was prepared by anodization, HWT (hot water treatment) and calcination. A commercial aluminum plate was anodized to form porous alumina films in the outer surfaces of the aluminum plate. In contrast to the anhydrous and amorphous alumina formed after anodization, the alumina in the an…
Gases and vapors of varying dimensions were used as probes to investigate the adsorption processes on MCM-41 and precipitated silica, prepared by the same method as for MCM-41, but without the template. The adsorption kinetics of nitrogen, carbon dioxide, n -nonane, and α-pinene were studied for different amounts of p…
Silica-based materials with hierarchical pore systems at three different length scales (small mesopores-large mesopores-macropores) have been prepared through a nanotectonic approach by using mesoporous nanoparticles as building blocks; the resulting materials present a highly accessible foam-like architecture and can…
The molecular structures of the basic copper phosphate minerals pseudomalachite, libethenite, and cornetite were studied using a combination of infrared emission spectroscopy, infrared absorption, and Raman spectroscopy. Infrared emission spectra of these minerals were obtained over the temperature range 100 to 1000°C…