Materials Literature
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The first graft copolymer of polypyrrole has been synthesized by electrochemically polymerizing pyrrole in the presence of pyrrole derivatized polystyrene; the copolymer produced exhibited an electrical conductivity comparable to that of polypyrrole.
Electrochemical polymerization of thiophene, 3-methylthiophene, and 3-ethylthiophene in propylene carbonate gave tough films, having conductivities of 190, 510, and 270 S cm–1, respectively.
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The field of fluid mechanics is rapidly advancing, driven by unprecedented volumes of data from experiments, field measurements, and large-scale simulations at multiple spatiotemporal scales. Machine learning (ML) offers a wealth of techniques to extract ...Read More
Publisher's Preface Foreword Introduction PART ONE: THEORY AND PRACTICE OF THE SMED SYSTEM 1. The Structure of Production 2. Setup Operations in the Past 3. Fundamentals of SMED 4. Techniques for Applying SMED 5. Applying SMED to Internal Operations 6. Basic Examples of SMED 7. Effects of SMED PART TWO: THE SMED SYSTE…
A critical assessment is given of the phase equilibria of the AI-Cu system. In the first section, the stable equilibrium diagram is constructed. In the second section, metastable and constrained equilibria are considered. These include metastable solvus curves of the AI-rich side of the diagram; on the Cu-rich side, t…
Two turbine-generator models and two system models are presented for the study of subsynchronous resonance. The turbine-generator models have a common torsional mode. The analytic results of three cases are presented where the analysis has been performed by various computer programs. Both self-excitation and torque am…
The dependence of the Verwey transition temperature on the nonstoichiometry of ${\mathrm{Fe}}_{3(1\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}})}$${\mathrm{O}}_{4}$ has been characterized by thermomagnetic analysis of the initial permeability in magnetite single crystals subjected to subsolidus controlled oxygen…
Binding of 5,10,15,20-tetrakis (N-methylpyridinium-4-yl)porphyrin (H2TMPyP4+) and its zinc complex (ZnTMPyP4+) to DNA is demonstrated by their coelectrophoresis and by absorption and fluorescence spectroscopic methods. Topoisomerisation of pBR322 DNA shows that H2TMPyP4+ unwinds DNA as efficiently as ethidium bromide…
Abstract Crystallographic and electron diffraction data for sapphire (α‐Al 2 O 3 ) are presented which enable ready and unique identification of TEM diffraction patterns and facilitate image analysis. Crystallographic data is presented in the form of stereographic projections and in figures listing angles between plan…
ABSTRACT Scanning Electron Microscopy (SEM) has been applied to the morphological study of various microcapsule systems. In addition to using standard preparation techniques for the examination of the outer structure of microcapsules, a new embedding and microtoming technique has been developed to allow the study of t…
This paper presents a synopsis of some recent work, still in progress, aimed at elucidating a quantitative explanation of the processes by which flow chimneys form when certain types of alloys are directionally solidified. If (for example) light fluid is released at the liquid—solid “mushy” (dendrite) zone, and coolin…
Abstract Continued study of the five crystalline Na–celluloses, previously shown to occur as intermediates during the mercerization of cellulose and exhibiting two types of crystallographic fiber repeats, further indicates that they fall into three classes based on their unit cells and NaOH contents. In one class are…
A study was undertaken in order to investigate the potential of NaBH4 as a precursor fuel source for a hydrogen–oxygen (air) fuel cell. At appropriate initial acid concentration, hydrolysis of NaBH4 is nearly 80% complete in 2.5 min, and nearly 90% complete in 10 min at 21.7 °C. Transition metals and their salts also…
Abstract The rates of calcination of two types of limestones, ranging in particle size from 1 to 90 μm, were measured over the temperature range 516 to 1,000°C. A kinetic model based on the B.E.T. (Brunauer‐Emmett‐Teller method) surface area of the CaCO 3 correlates the results over 5 orders of magnitude in reaction r…
The present status of our understanding of the diffusion of hydrogen in metals, both experimental and theoretical, is reviewed. Discussions are focused on the mechanism of diffusion of hydrogen isotopes H, D and T in f.c.c. and b.c.c. metals; the positive muon (μ +) is referred to where appropriate. An up-to-date comp…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility and properties of a poly(aryl ether ketone) in strong acidsMatthew T. Bishop, Frank E. Karasz, Paul S. Russo, and Kenneth H. LangleyCite this: Macromolecules 1985, 18, 1, 86–93Publication Date (Print):January 1, 1985Publication History Published online1 May 2002Pu…
The high‐temperature structure of zirconia was studied by powder neutron diffraction up to 2400°C. The boundaries of the domain of the nonstoichiometric tetragonal form are defined. They are consistent with a tetragonal‐cubic transition at 2350°C for stoichiometric zirconia. The changes in the structural parameters of…
Abstract Conventional thinking has long held that the abiotic precipitation of calcium carbonate occurs with a causal relationship between fluid My/Ca ratios and crystal morphology, crystal composition, and carbonate mineralogy, resulting in the formation of meteoric, equant, low-magnesium calcite and marine, acicular…