Materials Literature
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Diffusion of ${\mathrm{Ti}}^{44}$ into $\ensuremath{\beta}$-titanium has been measured as a function of pressure at approximately 1000 \ifmmode^\circ\else\textdegree\fi{}C using standard lathe-sectioning techniques. The diffusion coefficient is found to decrease with pressure, indicating a positive activation volume.…
Basic laws of motion of micropolar continuum are presented, and the adequacy of applying micropolar theory to liquid crystals is indicated. A set of constitutive equations is derived for nematic liquid crystals. Wave propagation problems are solved, and it is shown that the theoretical analysis is in good agreement wi…
The Raman spectrum of ${\mathrm{Ti}}_{2}$${\mathrm{O}}_{3}$ exhibits seven modes as predicted for the corundum structure. The persistence of all seven of these modes above the semiconductor-metal transition temperature indicates no space-group change on going through the phase transition. The ${A}_{1g}$ mode at 269 ${…
The EPR, optical absorption, and fluorescence spectra of Cr3+ in the spinel ZnGa2O4 have been measured and interpreted using a crystal-field model. The EPR experiments can be described by a spin Hamiltonian whose parameters are: 2D = + 1.048 ± 0.001 cm−1, g‖ = 1.9774 ± 0.0005, g⊥ = 1.9761 ± 0.0005. The broad band tran…
Infrared and Raman measurements of lattice vibrations in hexagonal Mo${\mathrm{S}}_{2}$ have been made over the combined range 20-4000 ${\mathrm{cm}}^{\ensuremath{-}1}$. Two infrared-active modes at 384 and 470 ${\mathrm{cm}}^{\ensuremath{-}1}$ and three Raman-active modes at 287, 383, and 409 ${\mathrm{cm}}^{\ensurem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of the aconitate isomerase reactionJudith P. Klinman and Irwin A. RoseCite this: Biochemistry 1971, 10, 12, 2259–2266Publication Date (Print):June 8, 1971Publication History Published online1 May 2002Published inissue 8 June 1971https://pubs.acs.org/doi/10.1021/bi0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPurification and kinetic properties of aconitate isomerase from Pseudomonas putidaJudith P. Klinman and Irwin A. RoseCite this: Biochemistry 1971, 10, 12, 2253–2259Publication Date (Print):June 8, 1971Publication History Published online1 May 2002Published inissue 8 June 197…
The Phillips---Van Vechten dielectric theory of binary tetrahedral compounds and Levine's bond-charge model are formulated in terms of macroscopically defined linear and nonlinear bond polarizabilities. This formulation allows the determination of the linear and nonlinear optical properties of tetrahedral solids. As a…
The recoilless resonance absorption and scattering of the 99 keV transition in 195 Pt has been studied to determine the lifetime [τ = (1.7 ± 0.2) X 10 -10 sec], conversion coefficient (α = 7.0 ± 0.3), magnetic moment (μ = —0.615 ± 0.041 nm), and radius relative to the ground state radius (δR/R < 0) of the first excite…
Abstract Partial cotton esters of long chain fatty acids of low degrees of substitution (D.S.<0.20) have been prepared by a variety of methods. In particular, the effects of the introduction of a stearoyl or an oleoyl group into the cellulose matrix on fabric properties, such as softness of hand and wrinkle recover…
The flow transients as initiated by rapid gas release are studied both experimentally and analytically. The mathematical model developed considers a multiple pin failure in a fast-reactor subassembly. In formulating the model, it is assumed that the released gas fills the subassembly cross section uniformly and that t…
Abstract Large hydrothermal deposits of halloysite clay occur in the Terraced Hills, Washoe County, Nevada and similar bodies probably are present elsewhere in the Basin and Range province. The host rock, an andesitic tuff, is underlain and overlain by volcanic flows; all these rocks are late Miocene to Pliocene in ag…
An analysis was made of the pressure distribution inside a tensioned, twisted fiber assembly. As a result of this analysis, three different expressions for the pressure, each resulting in the same average value for low twists, are obtained. Any of these expressions can be used to calculate the drafting force of a rela…
Abstract The correct figures for Fig. 1 (p. 3468) and Fig. 2 (p. 3477) are given below : FIG. 1. Elution profile of the peptic peptides of unoxidized T4 at phage lysosyme (80 mg) on a Dowex 50-×2 column (0.9 × 150 cm). Elution was carried out with a gradient of pyridine-acetate buffer established by means of a nine-ch…
The experimental conditions necessary for the resistometric detection of the pressure-induced bismuth III-IV transition are given and a value of 42·7 kilobars obtained for the start of the transition. The resistance-pressure characteristic shows the shape of the forward transition. A short discussion of recent crystal…
A method, applicable using either the transmission Kossel or divergent X-ray beam techniques, is described in detail. Calculations have shown that its greatest sensitivity corresponds to the lattice parameter region slightly less than that of pure α-iron. Its most useful applications should thus be for the study of α-…
Abstract Eight species of Pycnogonida collected by University of Canterbury Expeditions and the New Zealand Oceanographic Institute are recorded from the Snares Islands, which lie at 48° 05’ S, 166° 20’ E, 60 miles SW of South Cape, Stewart Island. The following species are recorded: Pallenopsis obliqua (Thomson, 1884…
Summary The local development of strongly oxidizing conditions during crystallization of a recent basalt lava lake on Piton de la Fournaise, Réunion, led to the production of approximately 15 % residual rhyodacite liquid. This was segregated into the vesicle cavities as the lava solidified, and congealed as a glass co…
Observations are reported here on the compressive creep behavior of pore-free translucent polycrystalline MgO) containing approximately.0.25 vt% Li, whose density is approximately 99.4% of theoretical density on the basis of single crystal ;MgO.The Li is believed to be in a fluoride-rich phase alo.rig the grain bounda…
Photographic grains do not always behave like Poisson-distributed disks, as the random-dot model assumes. Because real grains cannot occupy the same space at the same time, they crowd one another out at high densities, imposing constraints on their locations, which, consequently, cannot be completely random. The theor…