Materials Literature
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The thermal insulating abilities were evaluated using the guarded hot plate technique (ASTM D 1518-77) for the following selected nonwoven insulating materials: air-laid structures of low linear density polyolefin and low linear density polyolefin mixed with conventional linear density polyester, and carded structures…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsotopic assessment of fundamental catalytic mechanisms by kinetic modelingJohn Happel, Eric Walter, and Yves LecourtierCite this: Ind. Eng. Chem. Fundamen. 1986, 25, 4, 704–712Publication Date (Print):November 1, 1986Publication History Published online1 May 2002Published i…
Abstract The new compounds Sr 3 In 2 P 4 and Ca 3 In 2 As 4 crystallize in the orthorhombic system , space group Pnnm (No. 58), with the following lattice constants: Sr 3 In 2 P 4 : a = 1632.3(6), b = 682.8(3), c = 428.9(2); Ca 3 In 2 As 4 : a = 1621.2(6), b = 659.5(3), c = 430.6(2). In the anionic partial lattice InP…
The structural relationship of the competitive histamine H2-receptor antagonist 3-amino-5-(2-amino-4-pyridyl)-1,2,4-triazole (1) to the agonist histamine and to antagonists of the cimetidine type was explored by the design and synthesis of four series of bioisosterically designed prototypes. Biological data from these…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation P. Vuoristo, T. Mäntylä, P. Kettunen; Adhesion and structure of rf‐sputtered magnesium oxide coat…
We report on an interferometric frequency measurement of the $^{130}\mathrm{Te}_{2}$ absorption line which has been used as a reference in Doppler-free two-photon spectroscopy of the positronium $1^{3}S_{1}\ensuremath{-}2^{3}S_{1}$ transition. The measurement relies on a comparison with a nearby, previously calibrated…
Abstract IR transmission spectra are measured at (Bi 1− x Sb x ) 2 Te 3 single crystals with x = 0.5, 0.7, 0.9 near the absorption edge at 84 and 300 K. For the determination of the optical constants also the reflectivity of polarized infrared light is recorded in the plasma range at 300 K. The dependence of the free…
Complex values of the permittivity tensor of robber sheets which are manufactured by the rolling process were estimated by the least-squares method using the reflection coefficient measured for normal incidence. First, the frequency characteristics of the reflection coefficients of a rubber sheet backed by thin alumin…
Highly thermally conductive aluminum nitride ceramics were metalized by an electroless plated Ni‐P film for the purpose of utilizing them in practical electronic circuit substrates. Aluminum nitride substrates were effectively etched by solution, and the adhesion strength between and the Ni‐P film was found to increas…
Abstract Selective sulfation of the primary hydroxyl group of chitosan was performed by means of the pyridine‐SO 3 complex after the positions 2 and 3 of the aminoglucopyranosidic ring were protected by coordination with copper ions. The requirements for complexing copper ions were investigated as a function of the pH…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of a platinum-mercury "A-frame" clusterPaul R. SharpCite this: Inorg. Chem. 1986, 25, 23, 4185–4189Publication Date (Print):November 1, 1986Publication History Published online1 May 2002Published inissue 1 November 1986https://doi.org/10.1021/i…
This study was an attempt to develop implantable sustained release forms of drugs, based on formulations containing chitosan, a biodegradable polymer from a natural source, and hydroxypropylchitosan (HP-chitosan), its water-soluble derivative. The possibilities were explored using uracil as a model for anticancer drug…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition processes in aliphatic-aromatic polyamides investigated by mass spectrometryAlberto Ballistreri, Domenico Garozzo, Mario Giuffrida, Pietro Maravigna, and Giorgio MontaudoCite this: Macromolecules 1986, 19, 11, 2693–2699Publication Date (Print):November…
5-Pyridoxic-acid oxygenase, a cytoplasmic enzyme formed when Arthrobacter Cr-7 is grown with pyridoxine as a sole source of carbon and nitrogen, was purified about 190-fold to homogeneity from fully induced cells. The enzyme catalyzes Reaction a, (Formula: see text) the essential ring-opening step in the degradation o…
The photoabsorption and fluorescence cross sections of HBr were measured in the 105–235 nm region using synchrotron radiation as a light source. Sharp absorption bands were observed in the 105–120 nm region. These bands were classified into Rydberg series, and their oscillator strengths were measured. Fluorescence in…
Pure, crystalline, fine particulate calcium zincate was prepared. Its chemical composition, was established by chemical analysis, weight loss in thermogravimetric analysis, and by x‐ray powder diffraction pattern. Its solubility in different solutions at 298 K was determined. The solubility data were used to determine…
Liquid crystals were discovered about ninety years ago. The Austrian botonist Reinitzer [1] observed that cholesteryl benzoate has two sharp melting points at ∼145 and 179°C. At 145°C the solid crystalline material changed to a hazy anisotropic liquid which at 179°C became a clear, transparent, and isotropic phase. Th…
X-ray photoelectron spectroscopy with variable takeoff angles has been used to study the nitridation of Si(100). The air-oxidized layer on the silicon film has been cleaned off by an Ar radio frequency (rf) plasma, and nitridation was obtained at temperatures around 400 °C in a rf plasma of a NH3 (5%)-N2(95%) mixture.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and magnetism in ACuCl3 salts containing bibridged chains with square-pyramidal coordination geometryU. Geiser, R. M. Gaura, R. D. Willett, and D. X. WestCite this: Inorg. Chem. 1986, 25, 23, 4203–4212Publication Date (Print):November 1, 1986Publication History Pub…
Abstract The role of organic ligands of different ability to complex with Al 3+ in affecting the formation of allophane and imogolite and the nature of the precipitation (>0.01 µm) and soluble (<0.01 µm) products was investigated at initial Si concentration of 1.6 × 10 −3 mol.L −1 , Si/Al molar ratios of 0.5 and…