Materials Literature
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The discontinuity in the hard direction magnetisation curve for the alloy Pr2(Co0.6Fe0.4)17has been studied over the temperature rauge 5K-300K using a partially aligned polycrystalline sample. By means of the singular point detection technique we have measured the temperature variation of the anisotropy field and also…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and spin-state studies in solution of .gamma.-substituted tris(.beta.-diketonato) iron(III) complexes and their spin-equilibrium .beta.-ketoimine analogues derived from triethylenetetramineEric V. Dose, Kenneth M. M. Murphy, and Lon J. WilsonCite this: Inorg. Chem.…
The electrical membrane resistance rho(0) of the marine alga Valonia utricularis shows a marked maximum in dependence on the turgor pressure. The critical pressure, P(c), at which the maximum occurs, as well as its absolute value, rho(0) (max), are strongly volume-dependent. Both P(c) and rho(0) (max), increase with d…
Cross sections for evaporation residue formation and fission following complete fusion of $^{35}\mathrm{Cl}$ with $^{27}\mathrm{Al}$, $^{48}\mathrm{Ti}$, $^{54,56}\mathrm{Fe}$, $^{58,60,62,64}\mathrm{Ni}$, $^{90}\mathrm{Zr}$, and $^{116,124}\mathrm{Sn}$ have been measured with counter telescopes for laboratory project…
Abstract The structures of the precipitates of free‐radical poly(4‐vinylpyridine) (Vpy), free‐radical poly(2‐Vpy) and isotactic poly(2‐Vpy) with M(II)Cl2 (M = Co, Ni, Cu, Zn) obtained from solution have been investigated. The polymer compounds are similar to the known crystalline monomeric Vpy complexes and, with one…
Abstract Following the discovery that linear polyethylene can be drawn to very high draw ratios to produce oriented fibres and films with ultra‐high initial moduli, a similar study has been undertaken for polypropylene. In particular, the modulus/draw ratio relationship has been obtained for a range of polymers of dif…
An inexpensive interstitial water sampler using dialysis bags for the in situ separation of water from particulate matter in lake waters and sediments is described, and an example of dissolved silica is given.
X-ray, magnetization, and spin-echo NMR techniques have been used to measure the changes in the atomic ordering along with the effect of these changes on the local moment and the internal field distributions in ${\mathrm{Fe}}_{3\ensuremath{-}x}{\mathrm{V}}_{x}\mathrm{Si}$ alloys for $0\ensuremath{\le}x\ensuremath{\le}…
The electrochemical and corrosion behavior of nickel in deoxygenated and oxygenated H2SO4 (pH = 0.3) have been studied by the rotating disk technique. Some preliminary corrosion inhibition results of nickel by benzotriazole(BTA) have also been obtained. In the absence of oxygen, three distinct Tafel regions have been…
Abstract Caprolactam was copolymerized with 1,5‐dioxo‐1‐methyl‐4‐azaphosphepane or methylphosphacaprolactam. The molecular weight of the resulting copolymers decreased with increasing concentration of the thermally labile phosphorus moieties. Copolymers based on ≥40% caprolactam were shown to be crystalline by differe…
Since the internal energy $E$ is a monotonically increasing function of the temperature $T$, the moment $M(T)$ can be expressed as a function of internal energy $E$. The corresponding form of $E(M)$ is focused on in this paper. For ferromagnets, the two-dimensional Ising model is used to obtain the exact form of $E(M)…
In the systems Na(K)-Zn(Cd)-As(Sb) we found the following phases: NaZnAs, NaZnSb, KCdAs, KCdSb (tetragonal symmetry); KZnAs, KZnSb (hexagonal symmetry); NaCdAs, NaCdSb (orthorhombic symmetry)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical relaxation and equilibrium studies of association in aqueous solutions of bolaform detergents. 1. Dodecane-1,12-bis(trimethylammonium bromide)S. Yiv, K. M. Kale, J. Lang, and R. ZanaCite this: J. Phys. Chem. 1976, 80, 24, 2651–2655Publication Date (Print):November 1…
Extruded filaments of unmodified polypropylene (PP) with and without antioxidant were implanted subcutaneously in hamsters in order to determine their rate of degradation. Specimens were removed periodically during a 5 month test period and analyzed by infrared spectroscopy and dynamic mechanical testing. The analyses…
Abstract The effect of quasi‐hydrostatic pressures up to 100 kbar is investigated on the phase transitions of Fe 1− x Rh x alloys by resistivity measurements. The pressure dependence of the first order antiferromagnetic (AF) to ferromagnetic (FM) phase transformation temperature d T k /d p = 4.4 to 5 K/kbar. The press…
Magnetic and structural properties are presented for new ferromagnetic compounds of the form ${\mathrm{Rh}}_{2}\mathrm{Mn}X$ where $X$ is Al, Ga, In, Tl, Sn, Pb, and Sb. The exchange is described in terms of competing ferromagnetic Mn-Rh-Mn interactions and antiferromagnetic Mn-Mn interactions.
An analysis of transient multidimensional solidification in the presence of a growing shrinkage cavity has been performed. The enthalpy model, which had previously been applied only for cases with no density change, has been extended to accommodate substances which undergo a change of density upon phase change. The ex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn improved synthesis of octaethylporphyrinJohn B. Paine III, William B. Kirshner, David W. Moskowitz, and David DolphinCite this: J. Org. Chem. 1976, 41, 24, 3857–3860Publication Date (Print):November 1, 1976Publication History Published online1 May 2002Published inissue 1…
Raman spectra of glasses in the system K 2 O‐PbO‐SiO 2 and of crystalline K 2 O·4SiO 2 , K 2 O·2SiO 2 , K 2 O·SiO 2 , PbO, PbO· SiO 2 , K 2 O· PbO ·4SiO 2 , K 2 O· 4PbO ·8SiO 2 , and K 2 O ·2PbO· 2SiO 2 are reported and used to identify some of the structural units of the glasses. It is indicated that, in the glasses,…
SUMMARY The physical basis of microanalysis using measurements of electron energy losses associated with atom ionization or plasmon excitation in thin electron microscope specimens is explained in a simple manner. In addition the equipment used to resolve both the high and low energy regions of the loss electron spect…