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Abstract Dielectric results at frequencies between 6 × 10 −4 and 10 5 Hz are given for the β relaxation region of poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), poly(butyl methacrylate) (PBMA), and poly(isobutyl methacrylate) (PisoBMA). Apparent activation energies and relaxation strengths are calc…
Measurements are presented of the magnetization of mild steel, at field strengths between 100 A/m and 1200 A/m, for hysteretic and anhysteretic conditions. Magnetization was parallel or perpendicular to an applied uniaxial stress. The experimental results showed that tension parallel to the field or compression perpen…
The percolation properties of two-dimensional rotationally invariant granular random elastic networks (the disk model) are studied by use of both numerical simulations and finite-size scaling analysis. For the case of normal--empty-bond random networks, an exponent f\ensuremath{\approxeq}3.2\ifmmode\pm\else\textpm\fi{…
X-ray dichroism is observed at the L absorption edges of Pt in K2PtCl4, and the anomalous scattering tensor for Pt in this square-planar complex is measured in experiments with linearly polarized synchrotron radiation. For special azimuthal settings the diffraction intensities of some reflections depend on only one or…
Abstract Phyllosilicates in samples from Gulf Coast cores and the Martinsburg Formation near Lehigh Gap, Pennsylvania (which together represent a continuous sequence from mudstone to slate) are shown by TEM studies to possess imperfections on a massive scale and to exhibit a progressive increase in perfection through…
Reverse-phase chromatography, aqueous gel exclusion, and nonaqueous gel exclusion were assessed as procedures for preparative fractionation of the tumor-localizing product hematoporphyrin derivative. Porphyrin accumulation, fluorescence, and photodynamic cytotoxicity were monitored using the murine Sarcoma 180 tumor.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of pore volume distribution from size exclusion chromatography dataKarel. JerabekCite this: Anal. Chem. 1985, 57, 8, 1595–1597Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTArtificial allosteric system. 2. Cooperative 1-methylimidazole binding to an artificial allosteric system, zinc-gable porphyrin-dipyridylmethane complexIwao Tabushi, Shinichi Kugimiya, Michael G. Kinnaird, and Tomikazu SasakiCite this: J. Am. Chem. Soc. 1985, 107, 14, 4192–4…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of oxygen atom transfer from high valent iron porphyrins to olefins: implications to the biological epoxidation of olefins by cytochrome P-450Thomas Kodadek, Scott A. Raybuck, James P. Collman, John I. Brauman, and Lisa M. PapazianCite this: J. Am. Chem. Soc. 1985,…
The transport of proline is important for the adaptation of Salmonella typhimurium to osmotic stress because exogenous proline permits the growth of the organism in media of elevated osmotic strength that would otherwise be toxic. Measurements of the rate of [3H]proline transport in S. typhimurium indicated that the o…
We constructed a mutant, called RSV-SF2, at the ATP-binding site of pp60v-src. In this mutant, lysine-295 is replaced with methionine. SF2 pp60v-src was found to have a half-life similar to that of wild-type pp60v-src and was localized in the membranous fraction of the cell. Rat cells expressing SF2 pp60v-src were mor…
In the three-dimensional model of adenylate kinase, the phosphate-binding site for AMP and ATP has been identified [Pai, E.F. et al. (1977) J. Mol. Biol. 114, 37--45]. In this region one can distinguish a sequence glycine XXXX glycinelysine. The same sequence is found in many other mononucleotide-binding proteins incl…
The nucleoside antibiotic nikkomycin inhibited the formation of β-chitin spines by the diatom Thalassiosira fluviatilis, and slowed its growth rate, at a minimum inhibitory concentration of 4 µM. The resulting chitin-free cells sedimented much more rapidly in the cultures than did control cells. The uptake of nikkomyc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeneralized molecular orbital calculations on transition-metal dioxygen complexes: model for manganese porphyrinJames E. Newton and Michael B. HallCite this: Inorg. Chem. 1985, 24, 16, 2573–2577Publication Date (Print):July 1, 1985Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of (tetrabenzoporphinato)ironNagao Kobayashi, Masami Koshiyama, and Tetsuo OsaCite this: Inorg. Chem. 1985, 24, 16, 2502–2508Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July 1985https://pubs.acs.org/…
In several inorganic linear chain compounds a metal to insulator transition occurs leading to an incommensurate charge density wave (CDW) state. The CDW's are pinned by impurities. The pinning, however is weak and the response to d.c. and a.c. electric fields is dominated by the collective mode. The main features of t…
NMR measurements of the $^{1}\mathrm{G}_{4}$ excited level (9700 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$) of trivalent praseodymium in lithium-yttrium fluoride are reported. They were made by indirect optical nuclear double resonance, where a narrow-band optical excitation, which connects the $^{3}\mathrm{H}_{4}$ g…
The capabilities of a facility, brought into service to collect data on magnetohydrodynamic (MHD) effects pertinent to liquid-metal-cooled fusion reactor blankets, are presented. The facility, designed to extend significantly the existing data base on liquid metal MHD, employs eutectic NaK as the working fluid in a ro…
The behavior of sulfur in aluminum chloride‐N‐(n‐butyl)pyridinium chloride was studied using Raman spectroscopy and electrochemical techniques. In basic (BPC‐rich) melts, sulfur can be reduced to sulfide, probably in the form of an species. No oxidation to positive oxidation states of sulfur is observed in basic melts…
The MHD pressure drop in the second wall orifice which connects the first wall cooling channel and the header in one of the BCSS blankets is discussed. Though the second wall is thin, the pressure drop in the orifice can be very large because of leakage current effects. If eddy currents leak and do not have to pass th…