Materials Literature
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Turning experiments have been carried out on a low carbon iron using steel tools of different side rake face geometry. Temperature distributions have been determined using a recently developed metallographic method. It has been found that when using tools which have a controlled chip-tool contact length of 0.5 mm. the…
Magnetoelectric effect was observed in ZnCr 2 Se 4 below 20 K, in the state of screw spin structure. Magnetic field dependence of the effect at 4.2 K was qualitatively interpreted by the appearance of Dzyaloshinski interaction, when the field was applied along [001] or k 0 , the wave vector representing the screw stru…
An incommensurate phase was found in {N(CH 3 ) 4 } 2 CuCl 4 in the temperature range of 20.5°C∼27°C where a satellite reflection was observed by neutron diffraction at (2,0, 1-(1/3 -δ)) with δ-0.007. The satellite exists just at the commensurate position (2, 0, 1-1/3) between 20.5°C and -11°C in the monoclinic frame w…
Thalassiosira oestrupii (Ostenfeld) Hasle was studied from the southern Indian Ocean, Wed‐dell Sea, and northern Atlantic Ocean. It has the longer extension of the strutted process inwards, with three small columnar supports. A single strutted process near the central areola is 2‐3 areolae away from the single labiate…
The miscibility gap of an Fe-Cr-Co system is further examined by monitoring the microstructures and the magnetic properties of the alloys. It is shown that the shape of the miscibility gap is not parabolic but of a peculiar shape, protruding to the Fe side along the Curie temperature. The part of the protrusion of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange interaction in roof-shaped hydroxo-bridged copper(II) dimersMarie France Charlot, Olivier Kahn, Simone Jeannin, and Yves JeanninCite this: Inorg. Chem. 1980, 19, 5, 1410–1411Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published…
On the basis of the characteristic enthalpy changes associated with glass transformation, the glass transition (Tg) in gelatin can be detected readily, in addition to the helix-to-coiltransition, by difTerential scanning calorimetry, and the effects of water content on these transitions can be measured directly. The t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-Phase Oxidation of Phenol in a Rotating Catalytic Basket ReactorHideki Ohta, Shigeo Goto, and Hideo TeshimaCite this: Ind. Eng. Chem. Fundamen. 1980, 19, 2, 180–185Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 Ma…
In 0.25 M potassium acetate (pH 5.2).
The deformation of an ultrafine-grained aluminium alloy has been examined in tension and torsion. At grain sizes below about 3 μm the alloy exhibits inhomogeneous yielding but this is absent at larger grain sizes. If the lower yield strength values are plotted versus grain size the strengths are inversely dependent on…
The spectrum of U3+:LaCl3 has been analyzed; 53 crystal states of electronic origin have been identified, many of them accompanied by extensive vibronic sidebands having a recognizable structure similar to that for lanthanide-doped LaCl3. Seventeen energy level parameters were varied simultaneously in a least-squares…
We report measurements of the tilt angle $\ensuremath{\Phi}$ and the planar spacing ${d}_{C}$ near the second-order $\mathrm{Sm}C\ensuremath{-}\mathrm{Sm}A$ transition in $4\ensuremath{-}n\ensuremath{-}\mathrm{pentyl}\ensuremath{-}\mathrm{phenylthiol}\ensuremath{-}{4}^{\ensuremath{'}}\ensuremath{-}n\ensuremath{-}\math…
The spin dynamics of the transition-metal ferromagnets nickel and iron are investigated within the framework of the itinerant theory of magnetism. The theory is developed in terms of a generalized random-phase approximation which incorporates the band and wave-vector dependence of relevant interaction matrix elements.…
The synthesis and properties of one-dimensional conductors are of topical interest. It has now proved possible to synthesize (1) and a polymer (2), in which PcFe and pyrazine groups alternate. The physical properties of (2) indicate extensive electron delocalization over the pyrazine bridges.
The major cytotoxic activity of crude extracts of Nectandra rigida Nees is due to dehydrodiisoeugenol,the sample isolated being slightly enriched in the dextrorotatory enantiomer. Galgravin and two new tetrahydrofuranoid lignans, nectandrin A and nectandrin B, were also isolated and characterized along with small quan…
Localized states are characterized kinetically (via rate constants) and separated into transport states and traps according to whether the states actually enable transport (mobilize a particle) or disable transport (or act as temporary immobilizers). A technique is developed for effecting the separation uniquely. It i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDSC on Freeze-Dried Poly(methyl methacrylate)-Polystyrene BlendsAllan R. Shultz and Ann L. YoungCite this: Macromolecules 1980, 13, 3, 663–668Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 May 1980https://pubs.acs.org/do…
This paper discusses carbonate and sulfate formation in the Forties field and some of the laboratory inhibitor-selection techniques used to evaluate scale inhibitors for field use in the Forties injection and production systems. Two chemical treatments for stimulation injection wells also are described. Introduction P…
The minimum angles of taper that can in theory be formed to various preparations were established for representative dental preparations and operating distances. These values were compared with the taper of dental preparations formed both under laboratory conditions and in clinical practice, the latter by measurement…
Data from 145 recent impact tests of reinforced concrete walls with solid and pipe missiles are used to assess the accuracy of several empirical formulas. For solid missiles, penetration depths greater than six-tenths the missile diameter are predicted by the NDRC formula to within —25%, scabbing is predicted equally…