Constitution of Ni–Cr–Ru system
(1985). Constitution of Ni–Cr–Ru system. Materials Science and Technology: Vol. 1, No. 3, pp. 249-254.
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Field-Induced Cholesteric—Nematic Transition and Optical Bistability
The hystereis of the field induced cholesteric (-) nematic transition of chiral compounds with nematics of positive dielectric anisotropy has been examined. The results show that the initial orientation of the sample is important and indicate that in those applications where a strong contrast is not essential, an init…
The Reversibility of Sodium Insertion in Transition Metal Trisulfides
The effects produced by the insertion of sodium in the trisulfides of titanium, niobium, and tantalum were investigated by electrochemical techniques. Cyclic voltammetry measurements were carried out in these materials using high‐temperature sodium cells which utilize the solid electrolyte β''‐alumina. The data demons…
Schultenite from King County, Washington, USA; a second occurrence, and review
Abstract Schultenite, PbHAsO 4 , known only from Tsumeb, Namibia, has been identified from a second occurrence: near North Bend, King County, Washington, USA. It occurs as euhedral crystals in a quartz-arsenopyrite-galena vein. It has a measured density of 6.07(3) g/cm 3 and a calculated density of 6.079(4) g/cm 3 . T…
Thermal Properties Of ZrTe5
High resolution specific heat measurements have been performed in the temperature range 60-190K. Two very weak anomalies were found around 80K and 140K. Thermal conductivity measurements have also been performed and there was no detectable anomaly. The results are discussed in view of actual proposed interpretations.
Problems of Mixed Mode Crack Propagation
Loads and imperfections are introduced as control parameters in the potential energy, in Chapter 3. Limit points, asymmetric and symmetric bifurcation points are discussed, leading to an introduction, of expressions for the seven "elementary" catastrophes which much of the book centers on.Four of these expressions rel…
Polymerization of 2‐azabicyclo[2,2,1]heptan‐3‐one and its copolymerization with 2‐pyrrolidone
Abstract The anionic polymerization of a bridged bicyclic lactam, 2‐azabicyclo[2,2,1]heptan‐3‐one (ABHO), was carried out in bulk and in solution under various reaction conditions. In general bulk polymerization of ABHO was superior to solution polymerization in conversion and degree of polymerization. The resulting p…
Specific Heat and Magnetocaloric Effects in TbPO4 1. Experiments
Abstract At low temperatures TbPO 4 undergoes two successive phase transitions. Antiferromagnetic ordering along the tetragonal c ‐axis at T N1 = 2.28 K is followed below T N2 = 2.13 K by a structure of lower symmetry where the moments are tilted off the c ‐axis by about 20°. The B‐T phase diagram ( B along c ) is det…
Physicochemical Properties of Sized Yams
The physical properties of cotton and polyester/cotton blend yams sized with several two-component size formulations were evaluated. The sizing systems included starch/polyvinyl alcohol, starch/polyester, and polyvinyl alcohol/polyester. The yams were evaluated by means of tensile tests and by measurements of rupture…
Magnetoelastic surface waves in elastic ferromagnets—I: Orthogonal setting of the bias field
The minimal conditions under which a surface mode of the Bleustein–Gulyaev type can be made to propagate in a ferromagnetic substrate are established within the framework of a fully nonlinear, rotationally invariant, and thermodynamically admissible continuum theory of deformable ferromagnets. It is sufficient that th…
X-ray structure of a ternary metal complex: copper(II)-inosine 5'-monophosphate-imidazole. Metal binding to the N(7) atom of the nucleotide in a mixed-ligand system containing an aromatic amine
A ternary metal-nucleotide complex, Na2[Cu(5’-IMP)2(im)o,8(H20)l,2(H20)2h]as~ 1be2e.n4 pHr2ep0a,r ed and its structure analyzed by X-ray diffraction (5’-IMP = inosine 5’-monophos hate; im = imidazole). The complex crystallizes in space group C222, with a = 8.733 (4) A, b = 23.213 (5) A, c = 21.489 (6) 1, and Z = 4. Th…
Structural and magnetic instabilities in a twofold-degenerate band
The question of coexistence of cubic-to-tetragonal structural transition and both paramagnetic-to-ferromagnetic and -antiferromagnetic transitions in a twofold-degenerate band is studied under the Hartree-Fock approximation of the Hubbard Hamiltonian. The phase diagrams for both the transitions have been worked out at…
Soluble cyclopentadienylated polymers
Abstract Copolymers from styrene and a mixture of p ‐ and m ‐chloromethylstyrene were reacted with sodium cyclopentadienide in THF and precipitated in methanol at temperatures lower than −20°C to obtain soluble cyclopentadienylated polymers. Due to extensive gelation, the content of cyclopentadienyl groups could not b…
The Thermal Cis-to-trans Isomerization of N,N′-Diacylindigos. Kinetic Pressure, Solvent, and Substituent Effects
Abstract The kinetics of the thermal cis-to-trans isomerization of N,N′-diacylindigos(DAI) in various solvents and under high pressures has been studied. N,N′-Dibenzoylindigos(DBI) isomerize about 10 times slower than molecules not having a benzene ring in the acyl groups. The values of the activation volumes were abo…
The rapid precipitation of magnesium hydroxide from aqueous solutions: Analysis of nucleation and crystal growth kinetics, final nucleus numbers and primary crystal sizes
Abstract The studies of the rapid precipitation of magnesium hydroxide, from aqueous solutions of different concentrations by sodium, calcium and ammonium hydroxides, are analysed. The kinetics of nucleation and microcrystallite formation during the induction periods and the kinetics of crystal growth (onto the microc…
Preparation and Properties of Single Crystals of Hydrogen Bis(Phthalocyaninato) Neodymium(III)
Single crystals of hydrogen bis(phthalo-cyaninato)neodymium(III) have been synthesized by electrochemical means. The crystals are semiconductors and follow Curie-Weiss behavior.
Sigma Phase Intergranular Corrosion Effects in Austenitic Welds Containing Ferrite
It has been suggested that the sigma phase and its preliminary phases are responsible for intergranular corrosion of molybdenum-containing austenitic stainless steels in such environments as 65 wt% boiling nitric acid when the material is heat treated or when ferrite is introduced by welding. In this paper, data obtai…
Negative Corona in a Multiple Interacting Point-to-Plane Gap in Air
Negative corona discharge from multiple interacting points has been investigated with emphasis on the role of negative streamers in causing spark breakdown. The interaction among the evenly spaced bright discharge spots existing along a negative corona wire was simulated with a multiple point electrode whose point-to-…
Dimensional and Physical Characteristics of Single Jersey Fabrics
An account is given of a study of the dimensional changes of plain weft knitted fabrics made from 12s, 16s, and 22s grasicrimp yam, brought about by various processes of relaxation including dry relaxation, wet relaxation, and tumble drying. In the dry relaxed state, the nature of knitted loop depends on the yarn's ph…
Calcium-poor pyroxenes: phase relations in the system CaO MgO-Al2O3-SiO2
Abstract Using previously published data and a few new data the compositions of protopyroxene, orthopyroxene, and pigeonite, coexisting with liquid in the system CaO-MgO-SiO 2 , are reviewed and shown to depend subtly on the number and nature of the coexisting phases such as forsterite, silica, other pyroxene, and liq…