Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A separation-method for dispersed carbonaceous material in rocks and a calculation-method for Lc(002) are presented, and a numerical expression of the graphitizing-degree is newly proposed revising Tagiri and Tsuboi (1979), Graphitizing-degree=[(d002-3.70)/log (Lc(002)/1000)]×100. Some examples in the metamorphic aure…
Some electrooptic and thermooptic effects of cholesteric phase are used in liquid crystal visualisation and display systems provided spiral pitch is equal to a visible wavelength or several micrometers. Liquid crystals with cholesteric properties were generally cholesteric esters. Unfortunately these materials are che…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of the mechanism and kinetics of plasma-initiated polymerization of methyl methacrylateD. R. Johnson, Y. Osada, A. T. Bell, and M. ShenCite this: Macromolecules 1981, 14, 1, 118–124Publication Date (Print):January 1, 1981Publication History Published online1 May 2002…
Carbon dioxide sorption isotherms in poly(methyl methacrylate) (PMMA) and poly(ethyl methacrylate) (PEMA) are reported for pressures up to 20 atm. Temperatures between 35 and 80°C were studied for PMMA and temperatures between 30 and 55°C were studied for PEMA. Typical dual mode sorption isotherms concave to the press…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPorphyrins. 41. Phosphorus mesoporphyrin and phthalocyanineMartin Gouterman, Phillip Sayer, Eric Shankland, and Justin P. SmithCite this: Inorg. Chem. 1981, 20, 1, 87–92Publication Date (Print):January 1, 1981Publication History Published online1 May 2002Published inissue 1…
Two electrochemical techniques, anodic polarization and potentiostatic etching, were used in detecting the degree of sensitization (DOS) of austenitic stainless steel in an electrolyte which contained perchloric acid with NaCl as an additive. The DOS of the specimen could be quantitatively measured by the current dens…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT[Rh10P(CO)22]3-. A transition-metal carbonyl cluster with a metal polyhedron based on the bicapped square antiprism as illustrated by the structural study of the benzyltriethylammonium saltJose L. Vidal, W. E. Walker, and R. C. SchoeningCite this: Inorg. Chem. 1981, 20, 1, 2…
A unique resonance in the 13C NMR spectrum of [13C]methylated ribonuclease A has been assigned to a N epsilon, N-dimethylated active site residue, lysine 41. The chemical shift of this resonance was studied over the pH range 3 to 11, and the titration curve showed two inflection points, at pH 5.7 and 9.0. The higher p…
Using a cell designed to study the electronic interactions of gases with illuminated powders, the photoconductance, σ, of a series of oxides (TiO2, ZrO2, V2O5, ZnO, SnO2, Sb2O4, CeO2 and WO3) has been measured at equilibrium under various oxygen pressures PO2(from 7 × 102 down to 0.7 Pa) at room temperature in an atte…
The effects of doping with multiple impurities on the electromechanical properties of lead zirconate-titanate ceramics have been investigated from the viewpoint of the internal bias field. The internal bias field is strengthened by doping with the multiple acceptors K and Fe, but weakened by the multiple donors La and…
Abstract The evaporation of metallic gold into an ethanolic solution of bis(diphenylphosphino)‐methane (dppmH) and NH 4 NO 3 results in the formation of [Au 5 (dppmH) 3 (dppm)](NO 3 ) 2 with (dppm) = [Ph 2 PCHPPh 2 ] − ; an X‐Ray structure analysis revealed the presence of a Au‐C bond. Full physical data, including 19…
The lack of suitable materials having permeabilities (μr) greater than unity at microwave frequencies has previously made it difficult to design thin coatings of broadband radar absorbersat this frequency range. A possible solution is to utilize the hexagonal ferrites that exhibit significant μrvalues (̃5) over narrow…
Conference International Symposium on Polyvinylchloride, Third, Cleveland, Ohio, USA, 1980-08-10–1980-08-15 Published Online: 2009-01-01 Published in Print: 1981-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
Several kinds of the stretched polymer films, such as those of cellulose, polyvinylalcohol, and polyethylene are shown to have aligning capability for nematic liquid crystals (a mixture of cyanobiphenyls) in the direction of the stretching when the films are stretched over about 100%. Among them polyethylene is only o…
The interaction of H2+ CO2 has been investigated on Rh dispersed on MgO, TiO2, SiO2 and Al2O3 supports. The adsorption measurements revealed that, with the exception of Rh/SiO2, the presence of H2 greatly enhances the uptake of CO2 by Rh samples at 373 K. I.r. spectroscopic measurements showed that adsorbed CO and for…
The principles, advantages, and implementations of scanning reference electrode techniques are reviewed. The technique locates the position of localized corrosion, and can be used to monitor the development of corrosion and changes in the corrosion rate under a wide range of conditions. Data related to pitting, interg…
Pharmacologic responsiveness of the eccrine sweat gland has never been studied under well-defined in vitro experimental conditions. Using isolated cannulated single monkey palm eccrine sweat glands, the dose response to both cholinergic and alpha- and beta-adrenergic agents and the effects of various antagonists on ag…
The amount and dynamic behaviour of adsorbed hydrocarbon species formed during the reaction of H2+ CO on Ru/SiO2 were measured by the in situ infrared spectroscopic technique using Fourier-transform methods; the average chain length (the CH2/CH3 ratio), and the dependences of the rate of accumulation of such hydrocarb…
Eight modes of the guest-host cells (GH-cells), in which types of dye, liquid crystal and their alignments are adequately combined, are surveyed, and the color contrast of each mode is calculated. Three modes among them are of positive type display, that is, colored patterns on the colorless background contrary to the…
Zirconolite (CaZrTi2O7) and perovskite (CaTiO3) are key minerals in SYNROC, a ceramic material developed for the immobilization of high level nuclear reactor wastes. When these are incorporated in SYNROC, the long-lived radioactive actinide elements are preferentially partitioned into zirconolite and perovskite which…