Materials Literature
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The effects of the detailed structure of porous electrodes on their macroscopic and microscopic current and potential distributions have been quantitatively analyzed. An analytical expression has been derived for the macroscopic pore resistance in terms of a constriction factor which can be related to the pore microst…
The incorporation of actinide elements and their rare‐earth element analogues in titanate nuclear waste forms is reviewed. New partitioning data are presented for three waste forms containing Purex waste simulant in combination with either NpO 2 , PuO 2 , or Am 2 O 3 . The greater proportion of transuranics partition…
A wide study was carried out of the acid–base behaviour of ferricyanide ions in aqueous perchloric acid media in the range 0.1–11.5 M. This study shows that protonation and decomposition of the ferricyanide ions occur simultaneously. The three successive protonation equilibria were found in the acidity ranges 0.1–4.0,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphology of highly textured high-density polyethyleneH. H. Song, A. S. Argon, and Robert E. CohenCite this: Macromolecules 1990, 23, 3, 870–876Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1 February 1990https://do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAxial ligand orientation in iron(II) porphyrinates. Preparation and characterization of low-spin bis(imidazole)(tetraphenylporphyrinato)iron(II) complexesMartin K. Safo, W. Robert Scheidt, and Govind P. GuptaCite this: Inorg. Chem. 1990, 29, 4, 626–633Publication Date (Print…
The time dependence of relaxation for many substances near their glass transition region is often found accurately to obey a ``stretched exponential'' form, exp[-(t/\ensuremath{\tau}${)}^{\ensuremath{\alpha}}$], with the stretching exponent in the range 0<\ensuremath{\alpha}<1. It is the objective of this paper…
Polyundecanamide (nylon 11) was synthesized with 99+% 15N labeling of the amide nitrogen. Polymer samples were thermally treated to give the stable triclinic a crystal form and the metastable 6"' smectic form. The y form was obtained by precipitation from neat trifluoroacetic acid upon evaporation. 15N CP/MAS NMR clea…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of zwitterionic silicone sulfobetaine surfactantsSteven A. Snow, William N. Fenton, and Michael J. OwenCite this: Langmuir 1990, 6, 2, 385–391Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published iniss…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo-electron oxidation of cobalt phthalocyanines by thionyl chloride. Implications for lithium/thionyl chloride batteriesP. A. Bernstein and A. B. P. LeverCite this: Inorg. Chem. 1990, 29, 4, 608–616Publication Date (Print):February 1, 1990Publication History Published onlin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of annealing on the structure formation in a thermotropic liquid crystalline copolyesterAkira Kaito, M. Kyotani, and K. NakayamaCite this: Macromolecules 1990, 23, 4, 1035–1040Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Publ…
Experiments by Huppert (1982) have demonstrated that a finite volume of fluid placed on an inclined plane will elongate into a thin sheet of fluid as it slides down the plane. If the fluid is initially placed uniformly across the plane, the sheet retains its two-dimensionality for some time, but when it has become suf…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrossover behavior in high-frequency dielectric relaxation of linear polyions in dilute and semidilute solutionsKohzo Ito, Akira Yagi, Norio Ookubo, and Reinosuke HayakawaCite this: Macromolecules 1990, 23, 3, 857–862Publication Date (Print):February 1, 1990Publication Histo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElastic anomaly near the critical point of volume phase transition in polymer gelsShunsuke HirotsuCite this: Macromolecules 1990, 23, 3, 903–905Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1 February 1990https://pub…
Abstract Internally pressurized crosslinked polyethylene (XLPE) pipes fail according to one of the three following mechanisms: (a) stage I fracture occurs at the highest stresses and is ductile when large defects are absent; (b) stage II fracture is brittle and occurs at intermediate stress levels; (c) stage III fract…
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…