Materials Literature
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A piezoelectric ceramic actuator element with multilayer internal electrodes has been investigated. It was fabricated by multilayer ceramic capacitor techniques. An individual internal electrode has the same area as the element cross section area. It has no piezoelectric inactive part, so that it shows original strain…
X-ray absorption edge and extended x-ray absorption fine structure studies have been undertaken on resting (ferric) horseradish peroxidase, HRP compound I (HRP-I), HRP compound II (HRP-II), and several highly oxidized synthetic iron porphyrins that may have relevance as models for the iron site in horseradish peroxida…
Two-photon dye-laser excitation is used to observe numerous sharp $4{f}^{7}$ levels of ${\mathrm{Eu}}^{2+}$ in Ca${\mathrm{F}}_{2}$ and Sr${\mathrm{F}}_{2}$ which are overlapped by the $4{f}^{6}5d$ band, and thus inaccessible to single-photon spectroscopy. $4{f}^{7}$ excited states belonging to the $^{6}I$ and $^{6}D$…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of silica-immobilized 8-quinolinol with (aminophenyl)trimethoxysilaneMonte A. Marshall and Horacio A. MottolaCite this: Anal. Chem. 1983, 55, 13, 2089–2093Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published inissue 1 Nov…
To investigate the effects of verapamil on left ventricular systolic and diastolic function in patients with hypertrophic cardiomyopathy, we studied 14 patients at catheterization with a nonimaging scintillation probe before and after serial intravenous infusions of low-, medium-, and high-dose verapamil (total dose 0…
Abstract The rate of thermal decomposition of nickel sulfate was measured in the temperature range from 1003 K to 1078 K. When a powder sample was used, this reaction was characterized as a contracting volume reaction, with apparent activation energy of 296 kJ mol−1. The gaseous products were sulfur trioxide, sulfur d…
By neglecting edge or end effects in electric or magnetic systems and by using certain other conventional approximation techniques one may inadvertently create conditions that contradict some of the assumptions upon which Maxwell stress tensors and stress integrals are derived. Correction terms must then be added to t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic study of sulfate reduction with carbonJohn H. Cameron and Thomas M. GraceCite this: Ind. Eng. Chem. Fundamen. 1983, 22, 4, 486–494Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published inissue 1 November 1983https://doi.org/1…
The scrambling reaction between Mn2(CO)10 and Re2(CO)10 to form MnRe(CO)10 proceeds cleanly to a stable equilibrium in decalin at 170-190 'C. Studies of the initial rates show that two paths are followed, the major one being evident over the whole range of temperatures and partial pressures of CO above the solutions.…
Abstract Viscoelastic properties of short‐fiber‐reinforced natural rubber composites have been studied as a function of temperature and at different levels of adhesion. The effect of adhesion on the viscoelastic properties of the composites has been assessed, and it is found that the increase in adhesion increases the…
Simple cylindrical models of a hydrogen atom confined in crystalline quartz are considered. The isotropic and anisotropic components of the hyperfine splitting are evaluated by solving numerically the appropriate two-dimensional Schrödinger equation, utilizing an adaptation of a finite element package previously descr…
It is shown that a‐c powder EL deterioration is closely related to sulfur vacancy in the phosphor and the phosphor crystal quality, by measurement of ESR spectrum and x‐ray diffraction pattern. The EL phosphor life is improved with a decrease in the sulfur vacancy density in the phosphor. It is further improved with a…
Irradiated UO2 fuel elements with and without deliberately induced 0.8-mm-diam defects were heated in air at 220, 230, and 250°C for times up to 685 h. Pretest burnup was typically 190 MW·h/kg U (7600 MW·d/TeU) at a maximum linear power of 45 kW/m; cooling times were 1 to 3 yr. In fuel elements with six defects, diame…
Useful applications of charging phenomena occuring during scanning electron microscopy (SEM) of conductor-insulator composites have been investigated. Unlike the charging of insulating particles in conventional SEM techniques, the local field effect in a conductive composite enhances the relative secondary electron em…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal growth in aqueous solution at elevated temperatures. Barium sulfate growth kineticsG. L. Gardner and G. H. NancollasCite this: J. Phys. Chem. 1983, 87, 23, 4699–4703Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published iniss…
Magnetostriction and magnetic core loss at high frequency up to 100 kHz were investigated together with crystallization temperature, saturation magnetization, and magnetic permeability for amorphous (Fe1−xNbx)zSi88−zB12 alloys. Crystallization temperature significantly rises with Nb addition, particularly in the high…
With a view to examining the failure-bearing capability of Zircaloy-4 cladding under postulated Loss-of-Coolant Accident condition in LWRs, integral tests of rod-burst, oxidation and thermal-shock were performed using simulated fuel containing A1203 pellets sheathed in Zircaloy-4 specimen cladding, filled with He gas,…
Epimerase activity, which converts isopenicillin N to penicillin N, has been partially purified from cell-free extracts of Streptomyces clavuligerus. No stimulating cofactors of this activity were found, and neither EDTA nor anaerobic incubation caused significant inhibition of activity. Although pyridoxal phosphate d…
Abstract Fourier‐transform infrared spectroscopy has been used for the detection of conformational changes induced by plasticization in atactic poly(vinyl chloride) (PVC). The amount of short trans syndiotactic sequences decrease upon plasticization. This change depends on the amount and kind of plasticizer. Differenc…
PTCR characteristics in porous semiconducting barium titanate ceramics with Curie points from 60° to 360°C were investigated. The magnitude of the PTCR effect in these cerumics decreases self‐onsistently with increasing Curie point within this temperature range. A PTCR efSect of more than 4 orders of magnitude was ahs…