Materials Literature
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Abstract Molecular self‐assembly is described as a strategy for synthesizing large hydrogen‐bonded supramolecular aggregates that are based on the planar lattice formed of equimolar portions of cyanuric acid and melamine. The aggregates described in this paper contain four to ten individual molecules, are stabilized b…
Molybdenum(VI) has been shown by 183W NMR spectroscopy to replace WVI in the three main types of aqueous polytungstate anion. In ions with the paratungstate-A structure, [W7O24]–6, it can replace any or all of the tungstens, so that at least 19 mixed-metal species can be observed, and mostly also identified. Their rel…
Dynamic viscoelastic properties of phase-separated polypropylene (PP)/styrene-acrylonitrile copolymer (SAN), PP/ethylene-propylene-rubber (EPR) and nylon6 (PA)/SAN blends prepared by melt-blending were measured in molten state. As characteristic to heterogeneous liquids, slow relaxation mechanisms due to domain struct…
We present a dynamic light-scattering experiment on a planarly oriented nematic liquid crystal in the presence of a symmetry-breaking electric field applied normally to the cell planes. This experiment gives direct evidence for the critical behavior of the lowest splay fluctuation mode. A detailed theoretical analysis…
A novel form of LARC™-TPI has been developed which does not exhibit a crystalline melt as was encountered in earlier fonns of this material. Being amorphous allows the powder to be consolidated at temperatures near its glass transition temperature of 260°C (500°F). Adhesively bonded titanium lap shear specimens were f…
We report here the dipole moment (µ) and first hyperpolarizability (β) determined by electric field-induced second harmonic generation, for several merocyanine dyes containing an 1,3,3-trimethylindoline heterocycle as a ‘donor’ in which the ‘acceptor’ end of the molecule and the polyene bridge length was systematicall…
The effect of degassing temperature on the magnitude of the BET specific surface area and other physical properties of magnesium stearate was investigated. Magnesium stearate samples from two manufacturers were degassed using helium at 23°, 30°, 40°, 50° and 60°C. The specific surface area of the degassed samples was…
It is shown how a rather strong soliton regime as that detected experimentally in the incommensurate phase of thiourea can be described by a thermodynamic potential expanded in terms of a one-dimensional order parameter. The modulation of the order parameter admits a parametrization similar to that commonly used for i…
The paper is a critical review of non‐stochastic (referred here as deterministic) methods of calculation of effective elastic constants of single phase statistically homogeneous polycrystals. The methods are briefly described. They are compared and grouped according to their basic assumptions. Their degree of generali…
The single‐cell thermionic fuel element (TFE) is the main element of the TOPAZ‐II power system. The single‐cell TFE has a number of design advantages over the multi‐cell construction which enables and simplifies the performance of verification, acceptance, and qualification tests. This paper will discuss the design fe…
In-reactor testing of bolt-loaded precracked compact tension specimens was performed in 360{degree}C water to determine effect of irradiation on the SCC behavior of HTH Alloy X-750 and direct aged Alloy 625. Out-of-flux and autoclave control specimens provided baseline data. Primary test variables were stress intensit…
The impact of molecular chemistry on understanding the new physics found in magnetic materials based on organic molecules is starting to be appreciated.
Article Titanium Hydride for High-Temperature Thermal Energy Storage in Solar-Thermal Power Stations* was published on January 1, 1994 in the journal Zeitschrift für Physikalische Chemie (volume 183, issue 1-2).
Reticuloendothelial system (RES)-avoiding liposomes are known to accumulate in tumor tissues due to passive targeting. Dipalmitoylphosphatidylfluorouridine (DPPF), a potent antitumor agent readily incorporated into the lipid bilayer, was embedded in RES-avoiding liposomes modified with a uronic acid derivative, palmit…
X-ray diffraction (XRD) and analytical electron microscopy (AEM) have been used to characterise microstructural and microchemical changes produced by neutron irradiation of Zr-2.5Nb, Zircaloy-2 and Zircaloy-4 nuclear reactor core components. In many cases there is a clear relationship between the radiation damage micr…
Ab initio calculations have been carried out on 6-hydroxy-1-formylfulvene(HFF) to study (a) the ground-state molecular structure and relative stability of conformers, (b) the strength and main features of the intramolecular hydrogen bond, including harmonic vibrational frequencies and proton tunnelling, (c) hydrogen-b…
Abstract Epitaxial crystallization of high‐density polyethylene (HDPE), linear low‐density polyethylene (LLDPE) and low‐density polyethylene (LDPE) in the epitaxial system with highly oriented isotactic poly(propylene) (iPP) has been investigated by electron microscopy. The results obtained by bright field electron mi…
The problem of matching thermoelectric coolers and semiconductor lasers with respect to heat flow densities and electrical currents is discussed. It is shown that the solution of this problem is accomplished by the reduction of thermoelement dimensions to the submillimeter level. Assembled with extruded thermoelectric…
The structure of alkaline earth vanadate glasses of the compositions, xMO⋅(100-x)V2O5 (M=Mg, Ca, Sr, Ba, x=30, 40, 45, 50, 55), has been investigated by means of IR spectroscopy with reference to various crystalline alkaline earth vanadates structurally known. It is found that the structure of alkaline earth vanadate…
Recent plate impact experiments on glass specimens have apparently resulted in the generation of failure waves under uniaxial compression. Herein similar experiments are reported and interpreted for an aluminosilicate glass as a means for examining possible explanations of the observed behavior. This investigation bea…