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。
Binding of aspartate and glutamate residues with the lanthanide cation Yb3+ has been studied in D2O, involving two kinds of peptide backbones: N-acetylamino acid methyl esters and cyclic dipeptides. A method is described for the quantitative analysis of the lanthanide-induced shifts (LIS) from which the best model of…
An attempt is made to illustrate the continuous change that occurs in the solidification behavior of undercooled melts, as cooling rates increase from 0.0001 K/sec to about 1000 K/sec. At the higher cooling rates, more significant changes occur as the dendrite tip temperature begins to drop from the equilibrium liquid…
The dimethoxy-substituted Cookson's cage diketone (1a) underwent competitive rearrangement and cycloreversion reactions under treatment with Lewis acid, where two types of electron push-pull interaction are operative.
The influence of an electric field on a blue phase system containing a nematic component with negative dielectric anisotropy is investigated. For BP2, a shift of the maximum of selectively reflected light to shorter wavelengths is observed for the first time. For BP1, the maxima are shifted towards each other and addi…
Thermodynamic properties of Y2O3·Cr2O3 were determined by means of electromotive force (emf) measurements using stabilized zirconia as a solid electrolyte at 1182 -1386 K. The constructions of oxygen concentration cell was Mo|Cr, Y2O3, Y2O3·Cr2O3|ZrO2(+MgO)|Cr, Cr2O3|Mo Using the emf values and its temperature depende…
Ultrastructural changes in the silk gland after an ethanol treatment and the encapsulation of the abnormal regions of silk glands by hemocytes were studied. Abnormalities induced by low doses of ethanol are restricted to several cells located in the most anterior region of the middle silk gland, and to the duct cells…
Virtually every manufacturer of AISI Type 316L stainless steel surgical implants uses electropolishing as a surface finishing procedure, but little research has been devoted to the basic chemistry, techniques, and possible benefits of the process. The electrochemical reactions that take place in the electropolishing c…
In this work, the Lagrangian-Eularian code MMALE was applied to numerically simulate the penetration of a high speed copper jet into a metal-explosive-metal sandwich. The numerical simulation of the reactive flow induced in the explosive uses the Forest Fire model. Both normal and 45/sup 0/ oblique impact were conside…
The carbon deposition on iron has been studied by means of metallography and thermogravimetry, in order to investigate the carbon depositing behavior and the rate-determining step of the reacion. Two types of carbon, laminar carbon and filamentous carbon, are observed to deposit on iron. The deposition of laminar carb…
The purpose of this paper is to examine not only qualitatively but also quantitatively the influence of a rise time of longitudinal impact on the propagation of elastic waves in a bar. The adequacy of application of Love's theory for the propagation of longitudinal elastic waves to this problem is discussed by means o…
Abstract Thermal behavior of unfractionated poly(2‐methoxy)‐Cyanurate, PMCBC‐ film has been reported. The degradation of the polymer involved two steps. The glass transition temperature, T g , from DSC and DMA studies is ∼ 200°C. TMA study shows that the glass‐rubber transition region is in the range of 157 to 199°C.…
The data base of Type 316 stainless steel 20% cold-worked cladding swelling measurements from mixed-oxide fuel pins irradiated in Experimental Breeder Reactor-II (EBR-II) has been extended to a fast (E > 0.1 MeV) fluence of 17 × 1022 neutrons (n)/cm2. Previously, the data base from actual fuel pins included onl…
Abstract The fatty acid composition of three seed oils of Apocynaceae has been studied in this investigation. The seed oils of Apocynaceae were examined for their component acids and were found to contain the following acids: Rauwolfia serpentina , Benth, (wt.%) lauric 0.2 %, myristic 0.8 %, palmitic 17.7%, stearic 4.…
It is the purpose of this paper to analyse the problem of stress waves in a circular disk subjected to two equal and opposite concentrated impact loads at the end points of a diameter. The solution is based on the stress function approach and the Laplace transform method to a two dimensional non-axisymmetrical dynamic…
It has been demonstrated recently that ion simulations of neutron-induced swelling are strongly affected by the presence of the injected ion acting as an extra interstitial atom. The injected interstitial has been shown to exert a strong influence on both the void nucleation and steady-state regimes of swelling. In du…
1 H and 13C N.m.r. spectra of the title compound are reported, the latter showing unusual 13C–1H residual couplings which are rationalized by ‘through-space’ interactions between the Centrally co-ordinated hydroxy hydrogen and porphyrin carbon nuclei.
Abstract Isotactic polypropylene of various degrees of crosslinking was prepared using high concentrations of dicumyl peroxide as the crosslinking agent. Free radicals were generated by γ irradiation of crosslinked iso‐PP with a dose of 2.4 Mrad. It was found that the rate constant for free‐radical decay is independen…
Synthese d'isocyanates d'alkyle et d'allyle par reaction d'alkyl- et allyl-amines avec CS 2 , NaOH et le chloroformiate de benzyle
Corrosion of steel equipment under thermal insulation is and has been a costly problem in Union Carbide Corporation (UCC) chemical operations as well as other refining and chemical plants throughout the world. The Materials Technology Institute (MTI) has spent about $30 thousand trying to develop a nondestructive insp…
The sintering temperature of barium titanate was reduced to 110°C by using low melting glasses like BaO—B2O3 and highly polarizable glasses like Bi2O3–B2O3 and PbO—B2O3 which were added in BaTiO3 up to a maximum of 10 wt%. Addition of low melting glass powder accelerated densification by liquid phase sintering. Sinter…