Materials Literature
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A very general sufficient condition for the onset of "thermodynamic" instability at a turning point is proved, assuming essentially nothing beyond the smoothness of the equilibrium-sequence in question.
Abstract The identification and quantification of the water associated with powdered clinoptilolite and clinoptilolite-bearing tuffs were made using thermogravimetric, vacuum gravimetric, and differential scanning calorimetric techniques. Inflection points on thermogravimetric curves at approximately 80° and 170°C cor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMinimum fluidization velocity at high temperaturesRanga R. Pattipati and C. Y. WenCite this: Ind. Eng. Chem. Process Des. Dev. 1981, 20, 4, 705–707Publication Date (Print):October 1, 1981Publication History Published online1 May 2002Published inissue 1 October 1981https://pu…
Abstract Nitinol has been reported to be more susceptible to electrolytic dissolution than stainless steel. This study compares corrosion of the two metals under clinical conditions and finds no significant difference.
The heat capacity of polypropylene from 0 K to 600 K is reviewed on the basis of measurements on 20 samples reported in the literature. The crystallinity dependence is critically evaluated and a set of recommended data for completely crystalline and amorphous polypropylene are derived. The effect of tacticity on the h…
The sensitivity of compressed gases to free and fixed conducting and non-conducting particle contaminants is a limiting factor in the design of electrical apparatus. Conducting particles which may result from damage to a gas-filled system constitute a serious threat to its safe and reliable operation. This deteriorati…
The electrical resistivities, grain sizes, and charge carrier densities of Sb‐doped PTC‐type BaTiO 3 ceramics were measured as a function of additional doping with 3d ions of varying concentrations. From analysis of the PTC characteristics on the basis of Heywang's model it proved possible to derive grain‐surface acce…
During the past few years the ac capacitor industry has seen almost a complete change in dielectrics, electrodes, and impregnants. The dielectric has changed from paper to all poly-propylene film, the electrode from plain foil to either metallized film, metallized paper, or embossed foil, and the fluids have changed f…
The known vanadium oxides VO 2 + y ( 0 ≤ y < 0.5 ) have been examined as cathode materials in ambient temperature nonaqueous secondary lithium cells. The discharge products have also been chemically prepared and characterized by x‐ray diffraction, thermal analysis, and magnetic susceptibility. The best cathode materia…
Abstract This article describes a study of ionizing radiation‐induced changes in the chemical composition, crystalline content and structure, and flow properties in polytetrafluoroethylene (PTFE). Irradiatins conducted in the presence of oxygen cause acid fluoride end groups to be formed, which on exposure to water va…
A simple and reliable method for measuring the sinking rate of phytoplankton is described. This technique is suitable for both heterogeneous field populations and unialgal in vitro cultures. The procedure involves use of settling columns initially containing a uniformly mixed population of cells, and calculates a sink…
The structure of a tetragonal crystal of the title compound was determined by X-ray diffraction. The space group was found to be P 4/nmm with a 6.202(2) and c 7.410(1) Å and Z 2. The structure consists of infinite sheets of distorted VO6 octahedra and PO4 tetrahedra linked by shared oxygen atoms. Shared water molecule…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of highly reactive metal powders. New procedure for the preparation of highly reactive zinc and magnesium metal powdersReuben D. Rieke, Percy Tzu-Jung Li, Timothy P. Burns, and Sung T. UhmCite this: J. Org. Chem. 1981, 46, 21, 4323–4324Publication Date (Print):Oc…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text T. K. Gaylord and M. G. Moharam, "Thin and thick gratings: terminology clarification," Appl. Opt. 20, 3271-3273 (1981) Export Citation BibTex Endnote (…
Abstract A brief overview of the important issues governing the behavior of polymer blends is presented. Thermodynamic issues which determine the phase behavior of blends are reviewed and qualitatively related to physical interactions between blend components. The influence of melt processing conditions on the resulti…
n-Nonadecane shows a phase transition from orthorhombic to so called α phase near 22.8 °C and melts at 32 °C. Temperature dependence studies of infrared and Raman spectra of n-nonadecane and of selectively deuterated nonadecanes (2D2 and 10D2) allow one to obtain a detailed description of the structural changes which…
An overview is given of the nonequilibrium behavior of polymeric glasses. While the emphasis is to display the significant effects of the nonequilibrium behavior on observable properties, some general basics of the glass transition behavior and nonequilibrium behavior are also presented. Both molecular as well as phen…
A neutron structure analysis at 2.2-A resolution has been performed on bovine trypsin covalently inhibited by a transition-state analogue, the monoisopropylphosphoryl (MIP) group. The unique ability of neutron diffraction to locate hydrogen atoms experimentally has allowed the determination of the protonation states o…
The possibility of defining structural defects in amorphous solids in terms of parameters such as atomic-level internal stresses and local symmetry coefficients was proposed in a previous paper (Egami, Maeda and Vitek 1980). Using a model amorphous structure generated by a computer, these parameters are statistically…