Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The influence of high pressure up to 13 GPa on the optical transmission spectra of layered A III B III C crystals was investigated. The value of the pressure coefficient of the transmission spectra at 30% transmission is reported. Results indicate that these materials undergo a series of phase transitions in…
IR spectra of soluble poly-o-toluidine (POT) and poly-m-toluidine (PMT) have been studied. Preliminary assignment of their IR spectra is given by comparing their spectra in HCl and I2, doped states and in subsequently NH3 dedoped state with that in intrinsic state.
Article Cu Precipitations at the Surface of Crystalline Cu — Zr Alloys after Annealing in Hydrogen* was published on February 1, 1989 in the journal Zeitschrift für Physikalische Chemie (volume 164, issue 2).
Differential and total cross sections for the elastic scattering of electrons from gound-state silicon atoms have been calculated using the optical model. The optical potential includes the static potential, and the effects of exchange and polarization. The results are compared with the first Born approximation and sc…
Abstract High performance shaped charges require a perfect rotational symmetry and homogenity in structure. Therefore the density distribution of the explosive inside the charge has to meet the same specifications in order to obtain the desired geometry of the detonation wave. In this paper we present an analytical mo…
Data on the growth of cracks tested in aqueous solutions were interpreted in terms of surface force theory. For applied stress intensity factors greater than 0.25 MPa · m½, the position and the slope of the curves and their dependence on pH and ion concentration can be explained in terms of surface force theory, provi…
The response of a twisted nematic liquid crystal trapped between flat and parallel aligning layers is analysed. Using a recently developed form for the relevant integrals it has been possible to evaluate the twist and tilt of the director for any applied voltage for twists up to a maximum of 90°. It is shown that the…
The critical heat capacity associated with the nematic (N) to smectic-A (Sm-A) phase transition has been studied using high-resolution ac calorimetry in two mixtures of polar octyloxycyanobiphenyl (8OCB) and nonpolar terephtal-bis-butylaniline (TBBA). The slope ${\mathrm{dT}}_{c}$/dX of the N--Sm-A phase boundary, whe…
Abstract Cr, Co and Rh were introduced into P‐1, P‐2 and P‐2W nickel boride catalysts as promoters. The substrates of cyclohexanone and cyclohexene were used to examine the effects of those promoters on nickel borides for hydrogenation reactions. On cyclohexanone with strongly‐polared carbonyl group, Cr, Co and Rh are…
In garment manufacture, causes of sewability problems have to be identified so that remedial actions can be applied. In the case of seam pucker, establishing the cause of the problem is not easy because many different variables can produce the same fault. Existing methods of identifying seam pucker due to structural j…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new electron rich network polymer: poly(1,3,5-triaminobenzene)I. Johannsen, J. B. Torrance, and A. NazzalCite this: Macromolecules 1989, 22, 2, 566–570Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published inissue 1 February 1989ht…
Abstract Using the conception of an extended object (Umezawa et al.) based on the continuum theory of elasticity, monovacancy formation energies are calculated. Anisotropy is included for cubic symmetry by means of a first order approximation to the Green's function tensor and some tensor algebraic calculations. The l…
Progress towards the absolute prediction of the constitutive rheological relations of more complex fluids using the methods of non-equilibrium molecular/particulate dynamics simulations is reviewed. The approaches are based upon the initial use of simple hard-, soft-, and colloidal-sphere effective pair potentials and…
Amination reactions of 2,6-bis(primary amino)cyclotetraphosphazenes yield not only the expected (amino)cyclotetraphosphazenes but also novel trans-annular bridged bicyclic phosphazenes by an intramolecular substitution pathway. In addition, resins are formed in some reactions by an intermolecular condensation. The eff…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIndium dicarbonyl: matrix isolation ESR and IR studyWilliam G. Hatton, Nigel P. Hacker, and Paul H. KasaiCite this: J. Phys. Chem. 1989, 93, 4, 1328–1332Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published inissue 1 February 1989ht…
La phase III de K 2 TeBr 6 cristallise dans P2 1 /n avec affinement jusqu'a 0,0563 (a 295 K). La phase II cristallise dans P4/mnc avec affinement jusqu'a 0,0310 (a 418 K)
The rheology of any liquid can now, in principle, be predicted from first principles using the computer simulation technique of molecular dynamics. Computations on simple molecular fluids close to the solid phase co-existence line have revealed that shear thinning and shear thickening, as well as other non-Newtonian e…
Abstract Photochromic processes of 1′-hexyl-5′,8-dimethoxy-3′,3′-dimethyl-6-nitrospiro[2H-1-benzothiopyran-2,2′-indoline] were investigated with laser flash techniques. Photocoloration was found to proceed via the excited singlet state, and the quantum yield of coloration was an order of magnitude smaller than those o…
<div class="htmlview paragraph">Close collaboration between ABB and NGK enabled the development of the rotor for the Comprex<sup>(R)</sup> pressure-wave supercharger (PWS) as an extruded component in pressureless sintered silicon nitride. The ceramic rotor is lighter than the steel rotor, permitting…
The determination of trace-metal impurities in plutonium metal was investigated with the use of anion exchange separation and analysis by inductively coupled plasma/atomic emission spectrometry. Data on recoveries and independent measurements for some 30 elements show precisions and accuracies in the 1–10% range, valu…