Materials Literature
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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…
The paper presents a comparison of partial discharge (PD) measurements taken on 140 large power transformers using radio-influence voltage (RIV) meters calibrated in pV according to NEMA 107 Standard and also with the aid of wide-band and narrow-band PD detectors calibrated in pC according to IEC Publication 270. Resu…
Abstract 5,11,17,23‐Tetra‐ tert ‐butyl‐25,26,27,28‐tetrahydroxy‐2‐oxocalix[4]arene ( 4a ), 5,11,17,23,29,35‐hexa‐ tert ‐butyl‐37,38,39,40,41,42‐hexahydroxy‐2‐oxocalix[6]arene ( 4b ), and octa‐ tert ‐butyl‐octahydroxy‐trioxocalix[8]arene ( 4c ) were synthesized via 4‐ tert ‐butylcalix[4]‐, [6]‐ and [8]arenes from 4‐ te…
Abstract Elelectrically conducting polymers have been synthesized from completely conjugated bisphthalonitrile monomers. The monomers melt and are thermally polymerized at 260–300°C in air and then are converted into conductive materials by further processing at elevated temperatures in an inert atmosphere. Because th…
The effect of chemical etching by H2S04/H202/H20 (5/1/1) mixtures and of mechanopolishing by bromine-methanol diluted solution on GaAs (001) and InP (001) substrates for molecular beam epitaxy (MBE) has been studied using X-ray photoelectron spectroscopy (XPS). The final rinse in running deionized water does not produ…
Si NMR spin-lattice relaxation times have been measured for the two 2:1 layered phyllosilicates, sepiolite and rectorite. In sepiolite, it is shown that water contained within the structural channel provides a Si-H dipolar contribution to Si spin-lattice relaxation. In rectorite, hydrated interlayer paramagnetic catio…