Materials Literature
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Fe+ + + and Fe+ + ions in glass have been studied by means of paramagnetic resonance. The correlation of the Fe+ + + concentration with an intense resonance at g=4.27 shows the resonance is due to Fe+ + +. A theory is proposed explaining the observed g value and the implications for the atomic surroundings of Fe+ + +…
Abstract The flow of lead of different purities under conditions of simple shear has been investigated over a wide range of strain, at different stresses, and mostly at a temperature in the neighbourhood of 27 °C. The phenomena have been studied both with unchanged direction of stress and with the direction of stress…
Abstract Type I aluminium films deposited at 0 °C were of relatively low area, ca. 1000 cm2, stable and with a certain porosity since CO uptake was proportional to film weight. Thus a film area could be determined from its weight, since at saturation CO molecules occupy 0·75 of the total surface area given by the B.E.…
It is shown that at least two of the three known peaks in the photoconductivity versus wavelength curve of ${\mathrm{Cu}}_{2}$O are strongly dependent on the oxygen content of the material. The peak near 600 m\ensuremath{\mu} can be shifted from shorter to longer wavelengths by exposing the sample to relatively low ox…
The literature on the mineralogy and petrology of the scapolite family is reviewed. The general formula was examined in the light of 126 analyses from the literature, together with 9 new analyses. Of these 135 analyses, refractive indices were available for 64. Sixty-four of the analyses were rejected as unsatisfactor…
Abstract Elektrochemische Laboruntersuchungen an einem einfachen Modellsystem ergaben, daß für das Verhalten des Kupfers und der Kupfer‐Legierungen im Erdreich zwei Einflüsse: Sättigungszustand und p H ‐Wert des Bodens maßgebend sind. Auf Grund der einfachen Darstellung des Verhaltens des Kupfers und der Kupfer‐Legier…
It is pointed out that two distinct resonance effects take place in ferrite samples at microwave frequencies, ferromagnetic resonance and an effect due to the shape of the specimen. The latter effect is called Kittel resonance in this paper. It is commonly supposed that the two effects are the same, but it is shown th…
Abstract Adsorption experiments were conducted by mixing homoionic kaolinite and C 14 -labeled hydrolyzed polyacrylonitrile (HPAN) in water and solutions of electrolytes. Langmuir type adsorption isotherms resulted. Exchange cations on kaolinite increased adsorption in approximately the same order as such cations redu…
In a previous communication, it was shown that on prolonged exposure to urea at temperatures above 20" pepsin is irreversibly inactivated (1).The loss of activity is most marked in the pH range of 4.6 to 5.6 and is always accompanied by the formation of nonprotein material that originates from autodigestion of the pro…
substrate during the reaction; wavelength, 284 mu (or within the range 284-290 mu); initial substrate concentration, within the range 0 1-0 3 mg./ml.; slit width as narrow as possible. The final decision on slit width will depend on the conditions of the experiment and the sensitivity and stability of the spectrophoto…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNotes- Epoxidation of Cinnamaldehyde by Alkaline tert-Butyl HydroperoxideGeorge PayneCite this: J. Org. Chem. 1960, 25, 2, 275–276Publication Date (Print):February 1, 1960Publication History Published online12 March 2003Published inissue 1 February 1960https://doi.org/10.102…
SUMMARY: Observations on living colonies of Streptomyces coelicolor strain A3(2) growing on cellophan films were made by phase-contrast microscopy. Particular attention was paid to the mode of origin of the aerial mycelium. It was shown conclusively that aerial hyphae can originate as simple branches of the substrate…
Abstract Aliphatic chain molecules may be adsorbed on montmorillonite surfaces with the zigzag of their carbon chain either parallel or perpendicular to the surface. These orientations are designated α II and α I , respectively. Fourier syntheses have too few terms to distinguish clearly between these orientations. Th…
Abstract Desilication and removal of bases from the basalitic rocks of the Hawaiian Islands produces large amounts of halloysite and gibbsite, together with variable quantities of allophane and nontronite, iron and titanium oxides, and amorphous mineral and gel material. The nature and relative abundance of intermedia…
Magnesium and aluminum single crystals subjected to varying amounts of oscillatory strain of audio frequency have been investigated by measuring the strain amplitude-dependent complex dynamical-mechanical modulus at audio frequencies as a function of temperature and time. If the amplitude of the applied excitation exc…
Received 21 December 1959DOI:https://doi.org/10.1103/PhysRevLett.4.128©1960 American Physical Society
X‐ray, optical, and chemical data are presented for sillimanites and for a wide range of natural and synthetic mullites. Single‐crystal X‐ray studies have revealed a new type of mullite (called S mullite) characterized by subsidiary sharp reflections in distinction to the extra diffuse reflections of common mullite (c…
Abstract A study was made of the mechanical and equilibrium swelling properties of five series of polyurethane elastomers prepared from polyoxypropylene glycol 2025, dipropylene glycol, trimethylol propane, and either toluene diisocyanate (TDI) or hexamethylene diisocyanate (HDI). The study included the dependence of…
Technical Briefs Radiation Fin Effectiveness J. G. Bartas, J. G. Bartas General Electric Company, West Lynn, Mass. Search for other works by this author on: This Site PubMed Google Scholar W. H. Sellers W. H. Sellers Calculations and Special Problems Unit, General Electric Company, West Lynn, Mass. Search for other wo…
A number of single crystal tungstates have been prepared for paramagnetic resonance and emission studies. Compositions such as monoclinic MgWO4, ZnWO4, CdWO4, and tetragonal CaWO4, SrWO4, and BaWO4 containing paramagnetic ions of the transition and rare earth series have been prepared. They were grown by dissolving th…