Materials Literature
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Effect of manganese on magnetic properties of an Fe-24Cr-12Co-1.5Si alloy (weight fraction) has been systematically studied by electron microscopy and magnetic measurements, in order to estimate the availability of certain grades of ferro-chromium as raw material for manufacturing Fe-Cr-Co magnet alloys. It has been f…
Vibrational assignments are proposed for solid NaNH 2 SO 3 on the basis of room temperature polarized Raman spectra of single crystals. Infrared data for the region 4000–50 cm −1 of the polycrystalline sample are also presented. The results indicate that (1) there is no water of crystallization, (2) the hydrogen bondi…
This study was designed to examine the intranight evolution of spontaneous electrodermal activity (EDA). Eight paid volunteer male students were recorded for 3 complete nights (after a habituation night). The results show that: during the first sleep cycle, EDA is significantly lower than during the rest of the night;…
In a previous paper by the first author, a three-dimensional analysis for the calculation of the leakage magnetic field in power transformers was presented. The experimental verification of this analysis is the subject of this paper. Extensive comparisons between calculated and measured values of flux densities in the…
Summary Pore size distributions in the 10/10 4 nm e.c.d. range in aggregates from three New Zealand soils with largely monomineralic clay fractions, were determined by mercury porosimetry after oven drying and also after critical point drying following methanol and then CO 2 exchange from a range of water contents. A…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-nitroxyl interactions. 31. Single-crystal EPR spectra of a spin-labeled vanadyl porphyrinReddy Damoder, Kundalika M. More, Gareth R. Eaton, and Sandra S. EatonCite this: Inorg. Chem. 1983, 22, 20, 2836–2841Publication Date (Print):September 1, 1983Publication History P…
Abstract Einkristalle von AlTaO 4 wurden zwischen 1310–1360°C dargestellt und mit röntgenographischen Methoden die Kristallstruktur bestimmt. Diese Verbindung kristallisiert tetragonal mit a = 460,6 5 und c = 298,5 pm in der Raumgruppe D –P4 2 /mnm. AlTaO 4 besitzt eine ungeordnete Metallverteilung mit Rutilstruktur u…
The equilibrium pH index is proposed as a replacement for the Langelier Saturation Index (LSI) and the Ryzner's Stability Index (RSI) as a method for utility power stations to predict whether their cooling water will form calcium carbonate scale in their condensers. Both the LSI and RSI are explained, and it is seen t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly reduced organometallics. 15. Coordinatively unsaturated tetranuclear hydrido carbonyl clusters of molybdenum and tungsten. Structural characterization of tetrakis(tetrapropylammonium) tetrakis(tricarbonylhydromolybdate) ([(n-C3H7)4N]4[HMo(CO)3]4)Jiann T'suen Lin and J…
Diffuse interfaces are observed in the interconnected structure of a phase‐separated K 2 O‐Al 2 O 3 ‐CaO‐SiO 2 glass. With continued electron irradiation in the scanning transmission electron microscope, the interfaces are observed to sharpen with little attendant change in phase morphology, indicating that the as‐coo…
It has been known empirically that some kinds of liquid crystal align perpendicular to inorganic flat surface such as In2O3 film. The authors clarified in the previous paper that this phenomena was due to perpendicular adsorption of amphiphilic impurities contained in the liquid crystal to the substrate surfaces. In t…
A simple and practical viscometrical method for monitoring the progress of condensation polymerization reactions was investigated. It consisted of following the reaction mixture capillary flow time as a function of molar ratio of the reacting monomers in a polymerization reaction performed by gradual addition of terep…
An empirical formula for gamma-ray buildup factors in two-layer shields is proposed. The values of the parameters are given for the formula when fitted to the dose buildup factors, calculated by the invariant imbedding method, for normally incident gamma rays penetrating two-layer shields comprised of combinations of…
Kaolinite undergoes structural transformation on heating. X‐ray photographs reveal the existence of a spinel‐type phase when kaolin is heated at 980°C. The kaolinite decomposes into a spinel phase with the expulsion of silica. A controversy arises as to whether the spinel phase is γ‐Al 2 O 3 or Si‐Al spinel. Calculati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDependence of magnetic properties on structure in the systems nickel(II) molybdate(VI) and cobalt(II) molybdate(VI)K. Sieber, R. Kershaw, K. Dwight, and A. WoldCite this: Inorg. Chem. 1983, 22, 19, 2667–2669Publication Date (Print):September 1, 1983Publication History Publis…
Abstract Monodispersed poly(4‐bromostyrenes) (PBs) and their block copolymers with styrene, isoprene, and 3‐methylbutene were prepared and characterized by GPC and NMR. Polystyryl and α‐methylstyryl carbanions act as effective initiators of the anionic polymerization of Bs in THF. The undersirable side reactions, due…
We report magnetostriction measurements on a single crystal of Tb.27Dy.73Fe2. Length changes parallel and perpendicular to a 111 direction were measured from 298 to 3.1K in magnetic fields from zero to 25kOe. The λ vs H curves show saturation at low fields above 280K; below 280K λ becomes progressively more difficult…
The N-I transition temperatures for a range of 4-propyl 1-monoesters and several 1,4-diesters of cubane, bicyclo(2.2.2)octane, cydohexane and benzene have been determined. The differences between the values for the monoesters and diesters of each system and between those for the various ring systems for the mono- and…
Several optical tests were employed to demonstrate twinning in raphides from 10 species in the family Vitaceae and one species in the Araceae. Scanning electron microscopy revealed that twin raphides differ from the reported shape of twin styloids and that raphides of the Vitaceae are "barbed" along two sides. A model…