Materials Literature
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Abstract Mafic phyllosilicates in metabasites affected by low‐grade regional metamorphism from Wales and eastern North Greenland show variations in their structure and chemistry. These variations are related to four mineral zones in these metabasites, which are recognized on the presence/absence of various key calc‐si…
The authors present a generalization of the classical Preisach model which handles coupled magnetic and mechanical hysteresis. Magnetostrictive materials are known to have hysteresis with respect to both magnetic field H and mechanical stress lambda . To test the validity of the model, experiments where the two compon…
A secondary battery of the type , carbon is described. The polymer was electrodeposited on porous carbon rods, in the form of consistent, rather thick, highly porous, and low‐resistance layers. The battery was assembled in a configuration similar to that of the classical R‐6 dry cell. The performance of the battery ha…
Journal of Physical Chemistry
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…
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…
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…
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…
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…
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…
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…
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…
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…
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…
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 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…
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…
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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…
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…