Materials Literature
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Donor-donor and donor-acceptor dynamics in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{P}}_{5}{\mathrm{O}}_{14}:{{\mathrm{Nd}}_{x}}^{3+}$ are measured directly with a high-resolution, near-ir laser system. Time-resolved fluorescence line-narrowing measurements show an absence of rapid donor-donor transfer below 20 K and…
Ferrimagnetic oxides with hexagonal crystal structures (referred to as hexagonal ferrites) are characterized primarily by their foliate (leaf-like or platelet) structure and high anisotropy fields. These properties allow for the preparation of polycrystalline grain oriented magnetic compounds with controlled values of…
Abstract The absorption of pure chlorine into aqueous sodium carbonate solutions accompanied by the desorption of carbon dioxide was studied both theoretically and experimentally. The absorption rates of chlorine and the desorption rates of carbon dioxide were measured at 25°C using a baffled agitated vessel operated…
The electromagnetic equations of the motor are written, then transformed by the finite difference technique. Both the infinite extent of the secondary and the finite extent of the iron are taken into account by the partition method. Actual width of the iron and the secondary are considered. Most of the unknowns are el…
Article Phase Relations in the Beryllium-rich Section of the System Beryllium-Copper-Iron was published on August 1, 1982 in the journal International Journal of Materials Research (volume 73, issue 8).
Pit formation on iron was stimulated by chelating agents at lower concentrations: the effect was largest in EDTA followed by NTA, IDA, and G in this order. This is caused by the cathodic reduction rate of the passive film being stimulated in the presence of the chelating agent, and therefore the potential determined b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAzupyrene. Thermal isomerization. Nitration by silver nitriteArthur G. Anderson Jr. and L. Glenn KaoCite this: J. Org. Chem. 1982, 47, 18, 3589Publication Date (Print):August 1, 1982Publication History Published online1 May 2002Published inissue 1 August 1982https://pubs.acs…
The melting of nascent superhigh-molecular-weight poly(ethylene oxide) (PEO) has been studied by means of differential scanning calorimetry (DSC). High values of the melting temperatures and enthalpies were established. The higher temperatures are explained by the presence of tie molecules in high concentration. The p…
The myelographic contrast agent, metrizamide, causes a temporary confusional state in many patients. Since metrizamide is a 2-deoxyglucose analogue, it was tested for inhibitory effects on glucose metabolism. The Michaelis constant (Km) of human brain hexokinase for glucose rose from 0.039 to 0.24 and 0.47 mM with fin…
Nuclear spin relaxation times are calculated for quadrupolar nuclei situated at the center of octahedral and tetrahedral molecules. Vibrational distortion of such a molecule generates an electric field gradient at the center, which does not average to zero when the molecule is in an excited state of a degenerate vibra…
The thermal decomposition and the glass transition temperature (T) of polyisobutylene (PIB) were studied with a differential scanning calorimeter (DSC). The undecomposed and the decomposed polymers were analyzed by gel permeation chromatography for molecular weight distributions and by DSC for changes in the thermal p…
The standard method for the calculation of nuclear weapon fallout radiation doses and dose rates in operational type studies for the last 20 yr has been the computer algorithm known as WSEG-10. WSEG-10 uses empirical functions rather than numerical analyses and computes fallout dose (rates) in seconds or less on moder…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrido(triphenylsilyl)tetracarbonyliron derivatives with phosphine ligandsG. Bellachioma and G. CardaciCite this: Inorg. Chem. 1982, 21, 8, 3232–3234Publication Date (Print):August 1, 1982Publication History Published online1 May 2002Published inissue 1 August 1982https://d…
Faujasite occurs with phillipsite in a palagonitized cinder cone in the southern half of section 16, R. ll E., T. 16 N., Halloran Spring Quadrangle, San Bernardino County, California. Faujasite forms water-clear, millimeter-sized octahedra, commonly twinned on the spinel law. Averaged electron microprobe analyses yiel…
Densitometric scans of electron micrographs of type I collagen segment long spacing crystallites stained with uranyl acetate or phosphotungstic acid and uranyl acetate have been correlated with computer-synthesized scans derived from the sequence of the alpha 1(I) and alpha 2 chains. Three models that differ in the lo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry and reactivity of sulfur-bonded sulfenato-cobalt(III) complexesJ. D. Lydon and Edward DeutschCite this: Inorg. Chem. 1982, 21, 8, 3180–3185Publication Date (Print):August 1, 1982Publication History Published online1 May 2002Published inissue 1 August 1982https://pu…
The permeability of intact gas vesicles, isolated from the cyanobacterium Anabaena flos-aquae, to percyclofluorobutane (C4F8), has been investigated by two methods. Warburg manometry showed that a suspension of intact gas vesicles exchanges more C4F8 than an equivalent suspension of collapsed ones. Pressure nephelomet…
Abstract Previous investigators have indicated that stabilizers will block the transesterification catalyst in the preparation of PET by the DMT process. This was not the case when triphenyl phosphate (TPP) or Irganox 1010 was used as the stabilizer and manganous acetate as the catalyst. Stabilizers in this study incl…
The dynamics of a high-angle tilt boundary in a triangular lattice with a truncated Lennard-Jones potential has been simulated by the method of computer molecular dynamics. Boundary migration was observed at various temperatures above a threshold, and was interpreted in terms of small steps involving coupled sliding a…
The temperature variation of the refractive indices ( n o, n e) and density are reported for two liquid crystals. The order parameter is evaluated by both Vuks’ and Neugebauer's approaches. The possible sources of error in evaluating the order parameter from refractive indices measurements have been discussed. The con…