Materials Literature
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The production of domains during the application of a magnetic field on a bulk sample of nematic liquid crystal is shown. These domains are created during the process of realignment of the nematic directors and have many similar features to the domains created by electric fields (in the conduction regime). These domai…
The effects which low-temperature electron irradiation have on the photoluminescence from Si provide new information regarding irradiation-induced defects which participate in radiative recombination. Previous identifications of the 0.8–1.0-eV band with the divacancy and the 0.6–0.8-eV band with the Si-G15 (or K) cent…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComputation of Multicomponent, Multiphase EquilibriumBoyd George, L. P. Brown, C. H. Farmer, Paul Buthod, and F. S. ManningCite this: Ind. Eng. Chem. Process Des. Dev. 1976, 15, 3, 372–377Publication Date (Print):July 1, 1976Publication History Published online1 May 2002Publ…
Abstract The phenomenon of flow‐induced crystallization was investigated using a linear polyethylene above its normal melting point flowing continuously in a Biconical Rheometer. It was found that the resin crystallized in the superheated state at rates which increased with increasing shear rate and decreasing tempera…
Gamma irradiation was found to release iodine in small amounts from powdered samples of cesium iodide and barium iodide, but not from zirconium iodides. The amount of iodine released was measured with silver foil detectors in sealed capsules that contained the salt. The amount of release was markedly affected by impur…
Following a brief introductory remark on the holographic grating, the possibility of designing concave gratings for a specific application is discussed, giving basic ideas of the grating design, actual design procedures, and feasible ways of improving the existing design methods. As a proof of the usefulness of the de…
The weak-beam technique of electron microscopy has been used to investigate plate-like G.P. zones in aluminium-copper alloys. For aluminium-1-48 and 3-97 wt% copper alloys aged at 80, 100 and 130°C, G.P. (I) zones of about 35 to 100 Å in diameter were observed. In dark-field images, using the (002) reflection with |s|…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterpenetrating Polymer Networks Based on SBR/PS. 2. Influence of Synthetic Detail and Morphology on Mechanical BehaviorA. A. Donatelli, L. H. Sperling, and D. A. ThomasCite this: Macromolecules 1976, 9, 4, 676–680Publication Date (Print):July 1, 1976Publication History Pub…
The magnetomechanical behavior of the splat-cooled amorphous alloy Fe75P15C10 has been studied at audio frequencies by a vibrating-reed technique. The ΔE effect exhibits a maximum value at a magnetization near 0.5MS. Such a maximum has only rarely been observed in the past, but now appears to be a general feature of t…
As a first step toward constructing a general molecular model for cholesteric liquid crystals, we propose here a planar model in which the intermolecular potential is required to contain chiral contributions as a result of symmetry considerations. By means of a mean-field analysis, we identify the microscopic basis fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymerization of N-Vinylcarbazole, N-Vinyl-5H-benzo[b]carbazole, and N-Vinyl-7H-benzo[c]carbazoleKen-ichi Okamoto, Masafumi Yamada, Akira Itaya, Tadashi Kimura, and Shigekazu KusabayashiCite this: Macromolecules 1976, 9, 4, 645–649Publication Date (Print):July 1, 1976Public…
In the envelope of Escherichia coli, is a lipoprotein of molecular weight 7,200 as a major envelope protein. This lipoprotein was previously shown to exist in two different forms in the outer membrane of E. coli: the free form and the boundform, which is covalently linked to the peptidoglycau. The free form of the lip…
The fluorescence spectrum of KY3F10: 1% Eu in powder form was recorded at 77 and 4.2°K between 4600 and 7000 Å, and 89 fluorescence lines arising from levels 5D0, 5D1, 5D2, and probably 5D3 were observed. The spectrum agrees with with a C4v symmetry, and it is possible to determine the irreducible representation of th…
A theory is developed for spin-lattice relaxation in the nematic phase which includes both local and collective motion. It is found that the frequency dependence of the relaxation rate ${T}_{1}^{\ensuremath{-}1}$ depends on the correlation time for the motion at the local molecular level, ${\ensuremath{\tau}}_{c}$. Wh…
Measurements of low-temperature specific heats (2-37 K) are reported for the first time on some common paraelectrics (thallous halides, Pb${\mathrm{F}}_{2}$, KTa${\mathrm{O}}_{3}$), ferroelectrics [BaTi${\mathrm{O}}_{3}$, potassium dihydrogen phosphate or KDP, triglycine sulfate or TGS, LiNb${\mathrm{O}}_{3}$, LiTa${\…
The oxidation properties of GaAs(110), GaSb(110), and InP(110) have been studied with the photoemission technique using synchrotron radiation. One part of the work consisted of an investigation of the chemical shifts in the core levels upon adsorption of oxygen in submonolayer quantities. For GaAs and InP, oxygen remo…
Jute fiber properties commonly determined are strength and fineness. The relationship of these fiber properties with the various yarn-strength parameters are discussed. Though fiber bundle strength is closely associated with yarn tenacity, it does not explain satisfactorily the variation in yarn quality. Fineness meas…
The action of chloranil in boiling methanol on 2,7-bis(dimethylamino)-9,l0-dihydroanthracene (5)produces 2,2',7,7'-tetrakis(dimethylamino)-9,9'-bianthracene (6b); dehydrogenation of (5) with palladium-on-carbon in toluene gives 2,7-bis(dimethy1amino)anthracene (1).
This paper deals with the identification of certain species produced during the corrosion of iron in oxygen-containing and oxygen-free solutions. Iron was allowed to corrode in acid solutions of constant pH of NaBr, NaCl, Nal, NaNO3, Na2HPO4, Na2SO4, and NaClO4. These reactions were conducted in (1) air-saturated solu…
The magnetic structure of Mn(Nb0.5Ta0.5)2O6 with columbite structure was determined by means of neutron diffraction using single-crystal data. The intensities were gained by means of a small cold Eulerian cradle. The evaluation leads to a canted magnetic structure GxAz (G: S1 = - S2 = S3 = - S4; A: S1 = - S2 = - S3 =…