Materials Literature
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Rare earth and yttrium orthoferrites, RFeO3, where R is Y, Yb, Ho, and Tb, have grown under hydrothermal conditions from 20 ml KOH and NaOH solutions at 375°C, ∼8000 psi, and Δt=30° in the 〈110〉 and 〈001〉 directions at rates as great as 6 mil/day. Ease of growth appears to be inversely related to the ionic radius of R…
N-acetylglucosamine was found to be a good repressor source for catabolite repression of the beta-galactosidase system in Escherichia coli. It was found capable of increasing the severity of repression by glucose or gluconate when included in the medium with either of these substrates. N-acetylglucosamine was shown to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of the viscosity of organic glassesG. A. Von Salis and H. LabhartCite this: J. Phys. Chem. 1968, 72, 2, 752–754Publication Date (Print):February 1, 1968Publication History Published online1 May 2002Published inissue 1 February 1968https://pubs.acs.org/…
A review of those characteristics of the anisotropy found in thin Fe–Ni–Co films that are important from a practical viewpoint are presented. Previously published data are supplemented to form a composite ternary diagram of anisotropy field Hk as a function of composition for the alloy system Fe–Ni–Co for 250°C substr…
The typical aftereffect spectra of ferrites and related oxides could usually be classified as due to either ionic (and vacancy) or electron processes. The present status of the study of these phenomena is outlined especially from the point of view of the underlying microscopic mechanisms. As an illustration, the resul…
Abstract The pressure loss at the entrance of a capillary tube was studied as a means of characterizing viscoelastic fluids. Measurements of four polymer solutions were made and correlated with an equation of the form where D is the shear rate and where H ch and λ ch are a characteristic stress and a characteristic ti…
The chemical and magnetic structures of the alloy Pd2MnAl, determined from magnetic and neutron diffraction measurements, are described, and compared with results recently obtained for the alloys Pd2MnIn, Pd2MnSn, and Pd2MnSb. Pd 2 MnSn and Pd2MnSb have the Heusler (L21) structure, and are ferromagnetic with Curie tem…
Article The Influence of Crystal Structure on the Fluorescence of Oxidic Niobates and Related Compounds was published on February 1, 1968 in the journal Zeitschrift für Physikalische Chemie (volume 57, issue 3_6).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituted deuteroporphyrins. V. Structures, stabilities, and properties of nickel(II) complexes with axial ligandsByron D. McLees and Winslow S. CaugheyCite this: Biochemistry 1968, 7, 2, 642–652Publication Date (Print):February 1, 1968Publication History Published online1…
The surface energies of face·centred and body. centred cubic crystals have been calculated on the assumption that the atoms interact with pairwise potentials of either Morse or Mie type. The calculations take into account interactions between all neighbours and have been carried through for about 50 crystallographical…
A neutron-scattering experiment to look for spin-wave excitation-energy changes of magnetite at the transition point 119°K showed no such change. During this work we discovered, however, that the low-temperature structure gives rise to weak extra neutron-diffraction lines that can be indexed as (h, k, l±½) in cubic in…
CuCr 1+x Rh 1−x Se 4 with −1 < x ≦ 1 and CuCr1+xTi1−xS4 with 0 < x ≦ 1 show p-type metallic conduction and are ferromagnetic, while CuCr1+xTi1−xS4 with x<0 show n-type metallic conduction and no magnetic ordering at 4°K. From the magnetic and electrical properties, which indicate that Cu is monova…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApproach to the separation of inductive and mesomeric effects in complexes of the types LMn(CO)5 and LMo(CO)5William A. G. GrahamCite this: Inorg. Chem. 1968, 7, 2, 315–321Publication Date (Print):February 1, 1968Publication History Published online1 May 2002Published inissu…
Abstract A natural rubber vulcanizate containing almost entirely monosulfidic crosslinks was oxidized in oxygen and with tert ‐butyl hydroperoxide. The changes in physical properties due to oxidation were followed by stress–strain measurements, and the changes in chemical structure were investigated with chemical prob…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Richard Gordon; Adsorption Isotherms of Lattice Gases by Computer Simulation. J. Chem. Phys. 1 Fe…
The magnetostatic properties of the rare earth chromites, RCrO3, and those of the rare earth manganites, RMnO3, have been studied between 1.6° and 1500°K, in fields up to 28 000 Oe. These compounds are antiferromagnetic; they present two Néel points. For the rare earth chromites, the first Néel point varies between 11…
AN INVESTIGATION ON THE BASIC ASPHALTS OF THERMAL EXPANSION AND CONTRACTION OF ASPHALTIC CONCRETE WAS CONDUCTED. ASPHALTIC CONCRETE EXHIBITS TWO DIFFERENT THERMAL COEFFICIENTS OF EXPANSION AND CONTRACTION SIMILAR TO ASPHALT CEMENT IN THE TEMPERATURE RANGE MINUS 10 TO 140 F. THESE HAVE BEEN CALLED THE SOLID AND FLUID T…
The magnetostriction of iron single crystals has been measured as a function of temperature (77°K to 900°K), magnetic field (up to 14 kOe), and magnetic field orientation. These data have been used to evaluate the magnetostriction constants for two- and five-constant expressions. The high-temperature maximum in λ100 a…
We report the experimental observation, with pulsed field, of the anisotropy in magnetization theoretically predicted for single crystals of TmSb. Agreement with crystal-field-only theory is excellent at 1.5°K. At 20.4°K, agreement between isothermal theory and experiment is poorer. This discrepancy can be explained i…
Using the phase transformation at 68°C found in materials based on vanadium dioxide, devices exhibiting an S-type current-voltage characteristic have been produced. The characteristic has an unstable differential negative-resistance region which leads to fast switching (20 ns). Devices have been made by the fusion of…