Materials Literature
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The longitudinal and transverse speeds of sound of ice Ih, II, III, V, and VI have been measured by Brillouin spectroscopy in the range 0–10 kbar at −35.5 °C. The bulk adiabatic moduli derived from these measurements are 138.9, 98.7, 141.9, and 181.4 kbar for ice II, III, V, and VI, respectively, at pressures of 2.83,…
Rotational moulding has been available as a processing method for plastics for about 30 years. However, it is only within the last decade that substantial developments have started to take place so that the process can now be competitive with injection moulding and blow moulding for the production of complex shapes. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, electrochemistry, and spectroscopic and magnetic properties of new mononuclear and binuclear complexes of vanadium(III), -(IV, and -(V) containing the tridentate macrocycle 1,4,7-trimethyl-1,4,7-triazacyclononane (L). Crystal structures of [L2V2(acac)2(.mu.-O)]I2.…
The X-ray reflectivity of bent perfect crystals is calculated from a model where the crystal is approximated by a stack of perfect-crystal lamellae which have a gradually changing orientation. A computer program is developed for calculation of the reflectivity of the composite crystal from the dynamical theory of diff…
Refinement of triclinic lysozyme by restrained least squares against the 2 A resolution X-ray data is described, beginning with the model from cycle 17 of the preceding paper [Hodsdon, Brown, Sieker & Jensen (1990). Acta Cryst. B46, 54-62]. After 20 refinement cycles, R stood at 0.172. Nevertheless, serious errors inv…
A longitudinal double-blind study was conducted to determine the effect of sock fiber composition on the frequency and size of blistering events in long-distance runners. Thirty-five long-distance runners participated in this study. Two different socks were tested, which were identical in every aspect of construction…
Abstract A series of coin‐type lithium secondary batteries with polyaniline positive electrodes was developed and commercialized which might be not only the first practical polymer battery but also the first industrial application of conducting polymers. Performances of the commercialized batteries were described in d…
In situ transmission x‐ray absorption spectroscopy was used to investigate changes in the structure of as it was cycled as a nonsintered nickel oxide electrode in concentrated alkali. Results were obtained for dry as‐prepared electrodes and electrodes that were charged or discharged. Changes were observed in the (0001…
Abstract High-resolution transmission electron microscopy (HRTEM) and electron diffraction experiments have been performed on R1 and R> 1 illite/smectite (I/S) samples that from X-ray powder diffraction (XRD) experiments appear to contain well-ordered layer sequences. The HRTEM images confirmed earlier computer ima…
In this study, a detailed survey has been made of 200 silicon carbide crystals grown by the modified Lely technique. All 200 crystals were examined using, at minimum, the combination of X-ray oscillation photography and one synchrotron topograph. This has now produced a reliable and unique database on polytypism, one-…
We present a novel subpicosecond optical transient-reflection method, which employs the surface-plasmon resonance of a thin silver film as a very sensitive probe to study small transients of the effective electron and lattice temperature. By measuring under surface-plasmon resonant and nonresonant conditions, we can d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConducting polymer blends: polythiophene and polypyrrole blends with polystyrene and poly(bisphenol A carbonate)Hsing Lin Wang, Levent Toppare, and Jack E. FernandezCite this: Macromolecules 1990, 23, 4, 1053–1059Publication Date (Print):February 1, 1990Publication History P…
Using perovskite‐type oxide based on as a solid electrolyte, small‐size high‐temperature fuel cells were constructed and cell performances were examined. The Nd‐doped ceramic electrolyte exhibited a mixed conduction of proton and oxide ion. Mixtures of water vapor and some gases such as methanol vapor or methane were…
Laser-induced reorientation was studied in absorbing nematic films. The optical Freedericksz threshold occured at an intensity level of 50 W/cm2 in contrast to the normally observed few KW/cm2 value for transparent layers. Thermomechanical coupling is considered as a possible explanation of the observed anomaly.
The crystallization of lithium disilicate (Li 2 O·2SiO 2 ) glass nucleated at various temperatures was studied by differential thermal analysis (DTA). A plot of the DTA crystallization peak height versus nucleation temperature closely resembles the classical nucleation rate curve for lithium disilicate glass whose max…
Abstract Analytical and high-resolution transmission electron microscopy of weathered plagioclase and K-feldspar provided microtextural and chemical data that suggest a sequential formation of weathering products. An alteration layer < 1 µ m thick on feldspar surfaces had short-range order and was termed protocryst…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStress relaxation in the lamellar copolymer mesophaseT. A. Witten, L. Leibler, and P. A. PincusCite this: Macromolecules 1990, 23, 3, 824–829Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1 February 1990https://pubs.a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotovoltaic effect in symmetrical cells of a liquid crystal porphyrinBrian A. Gregg, Marye Anne. Fox, and Allen J. BardCite this: J. Phys. Chem. 1990, 94, 4, 1586–1598Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1…
A review of the results of studies on the structure, phase transitions and physical properties of alkylammonium halogenoantimonates (III) and bismuthates (III) is presented. The crystals of these compounds are characterized by a variety of anionic structures and show a number of phase transitions including those to po…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of cadmium sulfide in situ in reverse micelles. 2. Influence of the interface on the growth of the particlesC. Petit, P. Lixon, and M. P. PileniCite this: J. Phys. Chem. 1990, 94, 4, 1598–1603Publication Date (Print):February 1, 1990Publication History Published on…