Materials Literature
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Following a major shortage of 99Mo in the 2009–2010 period, concern grew that the aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as the target material. The Organisation for Economic Co-...Read More
Article Mechanism of Iron Attack Inhibition Arising from Additions of Aluminium to Liquid Zn(Fe) During Galvanizing at 450°C was published on December 1, 1973 in the journal International Journal of Materials Research (volume 64, issue 12).
Measurements of the attenuation of high frequency ( approximately 100 GHz) phonons in copper and in superconducting aluminium are described. The phonons are generated and detected by means of superconducting tunnel junctions; a brief analysis of this novel experimental technique is included. The attenuation lengths ob…
Strain rate cycling and stress relaxation experiments were performed to investigate the yielding behaviors and rate-controlling mechanism in nominally pure MgO crystals deformed in cube orientation over the temperature range 77°K to 673°K. Analysis of various activation parameters at different temperatures with respec…
Measurements of thermoelectric power, resistivity, and the temperature coefficient of resistance have been made on annealed silver films. The values obtained for the energy dependence of the mean free path of conduction electrons, [(∂ lnλ/∂ lnW)]W=WF, and the Fermi surface area, [(∂ lnA/∂ lnW)]W=WF, were 1.29 and −2.4…
The visible absorption and emission spectra of Tm2+ in SrCl2 sharpen at low temperatures and exhibit marked vibronic structure. The 4f12 3H6 5deg excited states account for these transitions. The splitting of these states is almost entirely due to the 4f-5d electrostatic interaction. For theory and experiment to agree…
Abstract Melt history, pressure, and crystallization temperature are three variables that may be used to vary spherulite size in polymer systems. In this study, bulk polypropylene samples were given various melt treatments and then isothermally crystallized under constant pressure. Spherulite size was found to increas…
On a utilisé les expériences de fluage pour mesurer la vitesse de montée des dislocations c. On trouve que la vitesse de montée varie avec la température avec une énergie d’activation do 1,80 eV, supérieure à celle de l’autodiffusion, et avec la contrainte, proportionnellement à σ2,7. Les estimations théoriques de la…
The article deals with the distribution and ecology of the Rhoicosphaenia, Diatomella, Mastogloia, Diploneis, Amphipleura, Frustulia, Brebissonia, Anomoeoneis and Stauroneis species known in Finland.
Article Crystal-structure refinements for orthorhombic boracite, Mg3CIB7O13, and a trigonal, iron-rich analogue was published on December 1, 1973 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 138, issue 1-6).
A method of calculating the magnitude and direction of the instantaneous flux density in a thin lamination of magnetic material is described. The technique was demonstrated by measuring the rotating flux in samples of mild steel, grain-oriented silicon iron, and at a point in the T-joint of a three-phase, three-limbed…
The sequence of changes following experimental removal of a central region of one valve of Mytilus edulis included: (1) the secretion of periostracum similar to one of the three layers of normal periostracum; (2) calcification on the periostracum in a pattern corresponding to the form of the periostracal surface; (3)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of the higher oxidation states of nickel. Molecular structure of bis(2,6-diacetylpyridine dioximato)nickel(IV)Gordon Sproul and G. D. StuckyCite this: Inorg. Chem. 1973, 12, 12, 2898–2901Publication Date (Print):December 1, 1973Publication History Published onl…
In the presence of NAD(+) the acylation by 1,3-diphosphoglycerate of the four active sites of pig muscle d-glyceraldehyde 3-phosphate dehydrogenase can be monitored at 365nm by the disappearance of the absorption band present in the binary complex of NAD(+) and the enzyme. A non-specific salt effect decreased the acyl…
Abstract The depolarization thermocurrent (DTC) method gives the dependence of the dielectric relaxation time on temperature. It has been used for investigations of relaxations obeying an Arrhenius‐like law in crystalline polymers. The analysis of this method shows it is possible to study mechanisms described by the W…
Abstract The molecular conformation and the crystal structure of α‐form poly‐ p ‐xylylene has been determined by x‐ray diffraction. The polymer has a monoclinic unit cell with a = 5.92, b = 10.64, c (fiber axis) = 6.55 Å, and β = 134.7°. Two chains pass through the unit cell, and the space groups is C2/m . The packing…
Abstract Stability determinations were made by solubility methods on two trioctahedral mica-derived vermiculites. The phlogopite-derived vermiculite was found to be unstable under acid solution conditions, where stabilities of montmorillonite, kaolinite and gibbsite had previously been determined. An attempt was next…
Abstract The nuclear magnetic resonance of 105 Pd has been observed in α‐PdH n for the first time. The resonant field was measured at 75°C as a function of hydrogen pressure p within the entire α phase region. A linear relationship between Knight shift and hydrogen concentration has been established by comparison with…
Chick cranial-bone procollagen, extracted at neutral pH in the presence of inhibitors of proteolytic enzymes, exists as a triple-stranded protein with disulfide bonds linking all three chains. The biosynthetic precursor function of this procollagen was demonstrated by pulsechase experiments. The ratio of radioactive h…
The present paper describes the isolation and identification of a major radioactive component of borotritide-reduced collagen, previously designated Fraction C. The derived structure for the compound confirms that it is identical with the ;post-histidine' component described by Tanzer et al. (1973) and given the trivi…