Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The formulae for the RMS scattering angle given by small-angle multiple-scattering theory are discussed and a correction to the standard Rossi formula is derived. Values of the correction factor are calculated for protons, alpha-particles and heavy ions; these results show that the correction is important for protons…
It is commonly assumed that the chemical form of fission product iodine that escapes from the core of a light water reactor under accident conditions is the elemental form. Experimental evidence is presented that indicates that this assumption is incorrect; instead, a metal iodide (probably cesium iodide) is the chemi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTESR spectra of nickel(II)-copper(II) and nickel(II)-cobalt(II) exchange-coupled pairs in transition-metal dinuclear triketonate complexesL. Banci, A. Bencini, C. Benelli, A. Dei, and D. GatteschiCite this: Inorg. Chem. 1981, 20, 5, 1399–1402Publication Date (Print):May 1, 19…
The photoelectrochemical behavior of p‐type WSe 2 single crystal electrodes in acetonitrile solutions containing a number of redox couples [ e.g. , N,N,N′,N′‐tetramethyl‐p‐phenylene diamine (+ 1/0), methyl viologen (+ 2/+1), nitrobenzene (0/−1), phthalonitrile (0/−1)] was investigated. For couples with potentials in t…
Abstract Early work with commercial‐grade limestones containing small quantities of MgCO 3 (2–10%) demonstrated that exchangeable Mg was reduced as the soil pH was increased in several soils. An incubation experiment was conducted to more precisely determine the extent of the Mg “fixation” and to evaluate several hypo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcylation of multiple anions of poly-.beta.-ketones by hydroxy- and alkoxybenzoates. Cyclization of the resultant tetraketones to benzophenones and xanthonesRonda M. Sandifer, Ajit K. Bhattacharya, and Thomas M. HarrisCite this: J. Org. Chem. 1981, 46, 11, 2260–2267Publicati…
The molecular and macroscopic changes occurring during the polymerization of poly(methyl methacrylate) (PMMA) bone cement have been investigated. Electron paramagnetic resonance (EPR) spectroscopy was used to monitor free-radical generation and this was compared to temperature changes occurring in the cement for vario…
The antiferromagnetic S-domain structure of a NiO single k-domain platclet has been investigated by neutron magnetic diffraction topography. From the images obtained, it is possible to rule out ⟨110⟩ as the antiferromagnetic direction, and to infer that magnetic moments are along a direction close to ⟨112⟩. It is then…
Abstract 1. A simple NR compound has superior tack compared to an SBR stock because of its greater ability to flow under compressive load and its higher green strength. The difference becomes greater as surface roughness is increased or test rate decreased. Tack differences between the two stocks can be quantitatively…
The photoelectrochemical behavior of n‐type single crystal electrodes in acetonitrile solutions containing several redox couples ( , , , thianthrene 0/+ , was investigated. Electrodes with discontinuities in the van der Waals' surface show large dark currents and recombination of electrons with photo‐oxidized solution…
By means of X-ray diffraction study, an incommensurate phase of {N(CH 3 ) 4 } 2 MnCl 4 was found in the temperature range of 19.1 ∼18.5^° C . Incommensurate satellite reflections were observed at ( h 0 l ±ζ) with ζ≃0.483. In the temperature range of 18.5 ∼-6.5^° C , the value of ζ is \(\frac{1}{2}\) (commensurate). Th…
Hydrogen induced damage to carbon and low alloy steels can occur in the absence (HIC), or more frequently, in the presence of external stresses (HSCC). A great variety of pipeline steels was investigated to compare the resistance against HIC and HSCC at different pH values in H2S containing environments. The response…
By mixing of potentially-mesomorphic electron donors and acceptors of the type N-(p-X-benzylidene)-p-Y-aniline, nematic and smectic liquid crystals could be induced. In the present work, the donor molecules with a dimethylamino group as X or Y and the acceptor molecule with a nitro group as X or Y were employed. The r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcluded-volume effects in dilute polymer solutions. 11. Tests of the two-parameter theory for radius of gyration and intrinsic viscosityY. Miyaki and H. FujitaCite this: Macromolecules 1981, 14, 3, 742–746Publication Date (Print):May 1, 1981Publication History Published onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of interfacial tension in ternary homopolymer-solvent systemsK. M. Hong and J. NoolandiCite this: Macromolecules 1981, 14, 3, 736–742Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published inissue 1 May 1981https://doi.org/10.1021/m…
A series of radioactively labelled porphyrin analogues have been synthesized and compared for tissue distribution and tumour uptake against 67Ga in the same tumour-mouse system. The compounds were: 14C-ms-tetraphenylporphine sulphonate (14C-TPPS), 35S-ms-tetraphenylporphine sulphonate (TPP35S), 35S-ms-tetra[beta-napht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOne-electron electrochemical reduction of a ferrous porphyrin dioxygen complexCurtis H. Welborn, David Dolphin, and Brian R. JamesCite this: J. Am. Chem. Soc. 1981, 103, 10, 2869–2871Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published…
A smeared-out-dislocation-type analysis is used to determine conditions for the blunting of an atomically sharp crack that is opened intension. It is found that when the ratio of the theoretical tensile strength σmax to theoretical shear strength τmax is large, pairs of dislocations of opposite sign are created, as th…
In the presence of certain cations (e.g. K+ or Mg2+) actin polymerizes. Below a certain concentration (the critical concentration) the monomer G-actin does not polymerize on the addition of K+ or Mg2+. However, the proteolysis experiments of Rich and Estes [J. Mol. Biol. 104, 777--792 (1976)] strongly suggest that cat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective telomerization of butadiene with various nucleophiles catalyzed by polymer-bound palladium(0) complexesKiyotomi Kaneda, Hiroo Kurosaki, Masami Terasawa, Toshinobu Imanaka, and Shiichiro TeranishiCite this: J. Org. Chem. 1981, 46, 11, 2356–2362Publication Date (Prin…