Materials Literature
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Phosphorescence quantum yields and lifetimes of 2-, 3-, and 4- hydroxypyridine and 2-methoxypyridine have been measured at 77 ° K in EPA and alkaline EPA using 285 and 254 nm excitation. The phosphorescence polarization is negative with the exception of 4-hydroxypyridine in alkaline EPA, and lowest triplet state is in…
The ternary borides MgNi 2,5 B 2 and Li 1,2 Ni 2,5 B 2 have been prepared and investigated by X-ray methods. They are isotypic and crystallize hexagonal in the space group P6 2 22—D 4 6 -with the following constants : MgNi 2 .5B 2 α = 4.887 ± 0.002 Å, c = 8.789 ± 0.004 Å; Li 1.2 Ni 2.5 B 2 a = 4.842 ± 0.002 Å, c = 8.6…
funds through Medicaid to provide treatment for conditions found at the time of the screening as well as dental treatment.' The amendments also pro- vide for a monetary penalty against the agency if the individuals needing cor- rective treatment do not receive the necessary treatment. The Department of Health, Educati…
We demonstrate experimentally that deviations of a nearly sinusoidal grating from the exact sine profile strongly influence the shape of the surface plasmon resonance anomalies in higher diffraction orders, especially in the first order. It is shown that this effect can be applied to an accurate determination of the a…
Analysis of pyrolysis products of polytetrafluorocthylene (PTFE) and polyfluore ethylenepropylene (PFEP) and the influence of pyrolysis conditions on the pyrolysis products were investigated to evaluate the inhalation toxicity of those pyrolysis products. Both polymers were pyrolysed at various temperatures in a flow…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA resin-bound vanadyl catalyst for the epoxidation of olefinsGary L. Linden and Michael F. FaronaCite this: Inorg. Chem. 1977, 16, 12, 3170–3173Publication Date (Print):December 1, 1977Publication History Published online1 May 2002Published inissue 1 December 1977https://pub…
Summary The decomposition of chrysotile fibres heated in air has been studied in the range 100–1400°C by electron microscopy and infra-red absorption. The first observable change in the structure occurred at 580°C, where cavities started to open up between the (001) layers of chrysotile as the fibres were dehydrated,…
The relationship between the molecular weight of liquid hydroxyl-terminated polybutadiene (HTPB) and the physical properties of the elastomers were investigated. HTPB having various molecular weights were cured with 4,4′-diphenylmethane diisocyanate (MDI) by the one-shot method and the physical properties of these ela…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSonoluminescence of aqueous solutionsC. Sehgal, R. P. Steer, R. G. Sutherland, and R. E. VerrallCite this: J. Phys. Chem. 1977, 81, 26, 2618–2620Publication Date (Print):December 1, 1977Publication History Published online1 May 2002Published inissue 1 December 1977https://pu…
ABSTRACT A study of attached diatom communities on artificial and natural substrates was conducted in Wheelwright Pond, New Hampshire, during 1975. There were differences in the species composition growing on artificial glass slides and natural substrates. The slides favored the accumulation of Achnanthes minutissima…
This investigation is concerned with voltage stabilizing effects of peroxide decomposition products, measured by electrical treeing resistance. Trees are filled with a liquid, consisting of decomposition products. These details and the relationship to the treeing phenomenon are described and explained. The treeing res…
Some recent results of the research aimed to correlate properties of filled silicone rubber compounds with surface properties of fumed silica fillers are reported. It is shown that the specific interaction between silica surface silanol groups and the siloxane chain of silicone rubber plays the main role in “crepe har…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsomerization of the alkyl group in (.eta.5-C5H5)Fe(CO)(PPh3)(alkyl) complexesD. L. Reger and E. C. CulbertsonCite this: Inorg. Chem. 1977, 16, 12, 3104–3107Publication Date (Print):December 1, 1977Publication History Published online1 May 2002Published inissue 1 December 19…
Blisters have been observed in the oxide film of aluminum in aqueous chloride solutions. They can be initiated by short duration (⪝ 1 msec), low voltage pulses. Such blisters grow only if the steady‐state potential of the specimen is above the pitting potential. The growth proceeds laterally along the oxide‐metal inte…
Abstract The indirect exchange in heavily doped europium chalcogenides is calculated in the mean field approximation. The finite width of the conduction band and carrier statistics (splitting of spin subbands, non‐thermal degeneracy) are taken into account. The model is applied to Gd‐doped EuO and EuS for which magnet…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and magnetic properties of [M(C5H5NO)6]L2 (M = copper, zinc; L = perchlorate(1-), tetrafluoroborate(1-))C. J. O'Conner, E. Sinn, and R. L. CarlinCite this: Inorg. Chem. 1977, 16, 12, 3314–3320Publication Date (Print):December 1, 1977Publication History Published o…
An appropriate uncertainty measure for a compact Lie group is the invariant dispersion ( Delta F) 2 =(g rs (F r -(F r ))(F s -(F s ))). It is proven that it is minimized for maximum weight vectors (of greatest length in the weight space), and those unitarily related to them.
Abstract Effects of particle size, crystallinity and the amount of the structural water in kaolinites on their infrared spectra, were studied. The samples were ground in a vibrating ball-mill, and infrared and X-ray spectra, as well as thermal and specific surface area measurements, were taken on the initial and groun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural characterization of [AsPh4]+[Fe4(NO)7(.mu.3-S)3]-. Stereochemical and bonding relationship of the Roussin black monoanion with the red ethyl ester, Fe2(NO)4(.mu.2-SC2H5)2, and Fe4(NO)4(.mu.3-S)4Cynthia Ting-Wah. Chu and Lawrence F. DahlCite this: Inorg. Chem. 1977…
Equimolar mixtures of binary or ternary combinations of tanthanides were studied with several photolytic sources. The solutions were photolyzed until more than 90% of Eu3+ was reduced. This is the first such study reported.(AIP)