Structural study of polyaniline films in reprotonation/deprotonation cycles
Journal of Physical Chemistry
Materials Literature
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Unconventional morphologies of symmetric, diblock copolymers due to film thickness constraints
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnconventional morphologies of symmetric, diblock copolymers due to film thickness constraintsT. P. Russell, A. Menelle, S. H. Anastasiadis, S. K. Satija, and C. F. MajkrzakCite this: Macromolecules 1991, 24, 23, 6263–6269Publication Date (Print):November 1, 1991Publication…
A differential equation approach to minor loops in the Jiles-Atherton hysteresis model
The reason for the failure of the differential equations to yield physical minor loops involved in the magnetization in ferromagnetic materials is explained. A modified solution for minor loops is presented which retains the features of D.C. Jiles and D.L. Atherton's (1983) original motor loops, but only requires know…
A new two-dimensional particle detector for a toroidal electrostatic analyzer
We describe a new two-dimensional detector for the detection of ions scattered from a solid target, analyzed in energy and scattering angle by a toroidal electrostatic analyzer. The detector resolves the scattering angle with a resolution of 0.4° over a range of 25°, and the ion energy with a resolution of 120 eV over…
Structure of a recombinant calmodulin from Drosophila melanogaster refined at 2.2-A resolution.
The crystal structure of calmodulin (Mr 16,700,148 residues) from Drosophila melanogaster as expressed in a bac$erial system has been determined and refined at 2.2-A resolution.Starting with the structure of mammalian calmodulin, we produced an extensively refitted and refined model with a conventional crystallographi…
Investigations of the Electrical Properties of Porous Silicon
We report capacitance and current‐voltage measurements of porous silicon in contact with sputter‐deposited aluminum. Three different substrates: 30–50 Ω‐cm boron‐doped (p − ‐type), 0.01–0.03 Ω‐cm boron‐doped (p + ‐type), and 0.003–0.005 Ω‐cm phosphorus‐doped (n + ‐type) silicon, are used as starting material. Porous s…
Overoxidation of Polypyrrole in Propylene Carbonate: An In Situ FTIR Study
Irreversible oxidation of thin polypyrrole layers was studied in carbonate (PC) by the subtractively normalized interfacial Fourier transform infrared spectroscopy method. For comparison, some measurements were performed in acetonitrile instead of PC. In PC, carbon dioxide, a product of anodic oxidation of propylene c…
Molecular packing and diffusion in polyisobutylene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular packing and diffusion in polyisobutyleneRichard H. Boyd and P. V. Krishna PantCite this: Macromolecules 1991, 24, 23, 6325–6331Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://pubs.acs.o…
Pharmacokinetics of Gd-DTPA in Patients with Chronic Renal Failure
We investigated the pharmacokinetics of dimeglumine gadopentetate (Gd-DTPA), a contrast agent for magnetic resonance imaging (MRI), in 24 patients with chronic renal failure whose creatinine clearance ranged from 7.2 to 70.0 mL/minute (median 25.4 mL/minute). After single intravenous administration of 0.1 mmol/kg, the…
Shear stress regulates smooth muscle proliferation and neointimal thickening in porous polytetrafluoroethylene grafts.
High shear stress appears to decrease wall thickening in diseased arteries and vascular grafts. To determine if increased shear stress diminishes smooth muscle (SMC) proliferation, we studied the effect of increased blood flow on neointimal thickening in porous polytetrafluoroethylene grafts implanted in baboons. An a…
A Self‐Assembling Triple‐Helical Co Complex : Synthesis and Structure
Not a simple tetradentate, but rather a bis(bidentate) coordination is revealed for L (L = bis[1-methyl-2(6-methyl-2-pyridyl)benzoimidizol-5-yl]methane) and is attributed to the inflexibility of its aromatic rings. In its reaction with cobalt(II) perchlorate an orange salt is produced, in which the three ligands wind…
Spatial correlation and photostimulability of defect centers in the x-ray-storage phosphor BaFBr:Eu2+
Photostimulable x-ray-storage phosphors in the form of image plates are one of the most important applications of defect centers in ionic crystals. Understanding the underlying mechanism, apart from its practical relevance, creates additional insights into the generation and kinematics of radiation defects in this cla…
NAD(+)-dependent isocitrate dehydrogenase. Cloning, nucleotide sequence, and disruption of the IDH2 gene from Saccharomyces cerevisiae.
NAD(+)-dependent isocitrate dehydrogenase from Saccharomyces cerevisiae is composed of two nonidentical subunits, designated IDH1 (Mr approximately 40,000) and IDH2 (Mr approximately 39,000). We have isolated and characterized a yeast genomic clone containing the IDH2 gene. The amino acid sequence deduced from the gen…
Polynitro-substituted strained-ring compounds. 2. 1,2-Dinitrospiropentanes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolynitro-substituted strained-ring compounds. 2. 1,2-DinitrospiropentanesPeter A. Wade, Paul A. Kondracki, and Patrick J. CarrollCite this: J. Am. Chem. Soc. 1991, 113, 23, 8807–8811Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Publi…
Food and packaging interactions: penetration of fatty food simulants into rigid poly(vinyl chloride)
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Kinetic model of liquid B2O3 gasification in a hydrocarbon combustion environment: I. Heterogeneous surface reactions
Abstract As part of an ongoing program to model hydrocarbon assisted boron combustion, a kinetic model has been developed to describe gasification of the ubiquitous boron oxide coating that inhibits particulate boron ignition. This model includes homogeneous gas phase oxidation reactions, multi‐component gas phase dif…
Highly microporous boron nitride for gas adsorption
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly microporous boron nitride for gas adsorptionTheodore T. Borek, William Ackerman, D. W. Hua, Robert T. Paine, and Douglas M. SmithCite this: Langmuir 1991, 7, 11, 2844–2846Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published…
Substrate and size effects on the coalescence of small particles
Here we present experimental results, using high-resolution electron microscopy and real time video recording, on the liquid-like coalescence of small gold particles supported on silica. We report that particles that are few nanometers in size, and decoupled from substrate interactions, coalesce extremely fast, in fra…
Thermal Diffusivities and Thermal Conductivities of UO2-Gd2O3
Thermal diffusivities of samples of UO2 and UO2 doped with 3, 5, 7 and 10 w/0 Gd2O3 were measured over the temperature range of 298~2,023 K by a laser flash method. Then thermal conductivities were calculated from them. The thermal conductivity decreased with increasing Gd2O3 content at low temperatures, while it was…
N-dimensional diamond, sodalite and rare sphere packings
The diamond, lonsdaleite and sodalite structures are generalized to N dimensions and described. Ring counts and coordination sequences for the N + 1-connected nets are given for N ≤ 6. Simple analytic expressions are given for coordination sequences for diamonds, sodalites and the primitive hypercubic lattice. Replaci…