Materials Literature
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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…
The earlier stage of the polymerization reaction of polyaniline has been studied employing in situ spectroelectrochemical techniques. The results indicate that the nitrene cation appears to be a key intermediate species, which leads to all three possible dimers including a head‐to‐tail dimer (N‐phenyl‐p‐phenylenediami…
Protein N-myristoylation refers to the covalent attachment of a myristoyl group (C14:0), via amide linkage, to the NH2-terminal glycine residue of certain cellular and viral proteins. Myristoyl-CoA:protein N-myristoyltransferase (NMT) catalyzes this cotranslational modification. We have developed a system for studying…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical and electrochemical copolymerization of aniline with alkyl ring-substituted anilinesYen Wei, Ramakrishnan Hariharan, and Sandeep A. PatelCite this: Macromolecules 1990, 23, 3, 758–764Publication Date (Print):February 1, 1990Publication History Published online1 May…
<div class="htmlview paragraph">Several different possibilities will be described and discussed on the processes of reducing NOx in lean-burn gasoline and diesel engines.</div> <div class="htmlview paragraph">In-company studies were conducted on zeolitic catalysts. With lean-burn spark-ignition engin…
Abstract Starburst‐Dendrimere sind dreidimensionale, hoch geordnete oligomere und polymere Verbindungen, die ausgehend von kleinen Molekülen – „Initiatorkernen”︁ wie Ammoniak oder Pentaerythrit – durch eine sich ständig wiederholende Reaktionsfolge entstehen. Bei den Synthesen, bei denen Schutzgruppentechniken von ent…
Glasses have nonzero zero-temperature entropies. Because they are out of equilibrium, the ``thermodynamic'' entropy, determined by heat flow, is not equal to the ``statistical'' entropy, which measures volumes in phase space. We discuss the relationship between the two kinds of entropy in nonequilibrium systems and sh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of aromatic polyamide polyanions: a novel processing strategy for aromatic polyamidesRobert R. Burch, Wilfred Sweeny, Hans Werner Schmidt, and Young H. KimCite this: Macromolecules 1990, 23, 4, 1065–1072Publication Date (Print):February 1, 1990Publication History…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIn situ measurement of the conductivity of polypyrrole and poly[1-methyl-3-(pyrrol-1-ylmethyl)pyridinium]+ as a function of potential by mediated voltammetry. Redox conduction or electronic conduction?Huanyu Mao and Peter G. PickupCite this: J. Am. Chem. Soc. 1990, 112, 5, 1…
The behaviour of concentric double emulsion droplets in linear flows is examined analytically, for the case when both fluid–fluid interfaces remain nearly spherical, and numerically, for the effect of finite interface deformation. The theoretical analysis is used to calculate the velocity fields interior and exterior…
Abstract Polystyrene/polystyrene latex interpenetrating polymer networks (IPNs) were prepared by seeded emulsion polymerization of styrene–divinylbenzene mixtures in crosslinked monodisperse polystyrene particles. The resulting latexes comprised uniform nonspherical particles, e.g., ellipsodal and egg‐like singlets, s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEmulsion stability and rigid foams from styrene or divinylbenzene water-in-oil emulsionsJoel M. Williams, A. James Gray, and Mark H. WilkersonCite this: Langmuir 1990, 6, 2, 437–444Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Publish…
By measuring contact angles with water, glycerol and formamide on a number of polar surfaces, an estimate could be made of the electron-acceptor (γ+ ) and the electron-donor (γ− ) parameters of glycerol (G) and formamide (F), relative to the parameters of. water (W), for which a reference value of γ+ W = γ− W = 25.5 m…
The plasma‐enhanced chemical vapor deposition process for SiN x H y films has been in use for over two decades, but the chemistry of the process has yet to be explained. In the present work, the composition of a 13 MHz NH 3 ‐ SiH 4 parallel plate glow discharge plasma was analyzed by line‐of‐sight sampling from the fi…
Filamentous phage infection induces the synthesis of large amounts of an Escherichia coli protein, phage shock protein (Psp), the product of a previously undescribed gene. This induction is due to the phage gene IV protein, pIV, an integral membrane protein. The uninduced level of Psp is undetectable, but when induced…
Historically, multilayer ceramic capacitors (MLC's) have not been considered for energy storage applications for two primary reasons. First, physically large ceramic capacitors were very expensive and, second, total energy density obtainable was not nearly so high as in electrolytic capacitor types. More recently, the…
Effects of alloying elements on the corrosion resistance of mostly binary rapidly solidified (RS) magnesium alloys were examined using electrochemical techniques. Uniform corrosion rates were measured at room temperature in a p H 9.2 sodium borate buffer using electrochemical impedance spectroscopy (EIS). Comparisons…
From transmission electron microscopy studies on several complex lead perovskite compounds Pb(B'B'')O 3 , and their solid solutions a classification can be obtained based on B-cation order. This classification divides the complex lead perovskites into three subgroups; random occupation or disordered, nanoscale or shor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of surface-capped, size-quantized cadmium sulfide clusters. Chemical control of cluster sizeNorman Herron, Ying Wang, and Hellmut EckertCite this: J. Am. Chem. Soc. 1990, 112, 4, 1322–1326Publication Date (Print):February 1, 1990Publication His…
In polycrystalline semiconductors the trapping of charge at the grain boundaries has a decisive influence on the electrical transport properties through the formation of electrostatic potential barriers. By proper materials processing many interesting device applications can be realised, which exploit the electrical a…