Materials Literature
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Summary The mineralogy of 14 chloritic soils of various drainage classes developed on different parent materials from the Loch Awe area of Argyllshire, Caithness, and the Southern Uplands reveals only minor variations'in clay mineralogy with profile depth, the frequent presence of primary minerals indicating that all…
ADVERTISEMENT RETURN TO ISSUEPREVArticleUnsymmetrical dimethyltetrathiafulvaleneF. Wudl, A. A. Kruger, M. L. Kaplan, and R. S. HuttonCite this: J. Org. Chem. 1977, 42, 4, 768–770Publication Date (Print):March 1, 1977Publication History Published online1 May 2002Published inissue 1 March 1977https://pubs.acs.org/doi/10…
The perovskite‐type compounds (Ln = lanthanoid element, M = alkaline earth element, M' = transition metal element) are examined as oxygen electrode materials for an alkaline solution. A porous sintered electrode consisting of a compound like is satisfactory in both polarization characteristics and stability under work…
The conductivity of single crystals of Al 2 O 3 + Mg and the ionic and electronic transference numbers were measured at high temperatures as a function of orientation, oxygen pressure, and temperature. Optical absorption in the visible range was measured on cooled annealed crystals. The results are interpreted on the…
Summary A comparison was made of the physical properties of pairs of silt soils differing only in organic matter content. Within the textural group studied, the member of the pair with more organic matter had better physical properties relating to both plant growth and soil management. Increased organic matter give hi…
Abstract The viscoelastic properties of polytetramethylene oxide—polytetramethylene terephthalate block polymers are strongly influenced by phase separation of the 4GT hard blocks into crystalline domains. Thermal analysis reveals a single T g which increases with increasing 4GT content. This suggests that short seque…
The trapping of hydrogen isotopes at defects in Mo and Nb have been studied. Ion beams of 11- and 18-keV He+, 55-keV O+ and Ne+, and 500-keV Bi+ were used to create defects. Subsequently H or D was injected at room temperature by use of molecular beams of 16-keV H+2 and D+2. Appreciable enhancements were observed in t…
The volume, index-of-refraction, and stress changes induced in vitreous silica by irradiating with 18-keV electrons have been measured over the dose range from 2.5×1010 to 3×1012 rad. The volume and index measurements were performed using a new technique based on producing a spatial modulation of irradiated and unirra…
Abstract Six alkylammonium molybdates which we have prepared were examined for photochemical and photochromic properties in a solid and in an aqueous solution. The white crystals were reddish brown or violet when irradiated with UV light. Five compounds of the six were photochromic under aerobic conditions. The therma…
Article Kinetische und thermodynamische Messungen zur Aggregation von perfluorierten Tensiden was published on March 1, 1977 in the journal Zeitschrift für Physikalische Chemie (volume 106, issue 3-6).
An experimental study comparing radiation-induced degradation of poly(methacrylates) from ultraviolet, gamma-ray (60Co), and electron-beam irradiation is presented. Analytical techniques used include mass spectroscopy, low-temperature electron paramagnetic resonance, and infrared spectrometry. The poly(methacrylate) p…
The weak-beam technique has been used to observe two- and four-fold dissociations in Fe-Al alloys, having compositions between 26 and 36 at.% Al, with B2-type and with DO3-type long-range order. From the orientation-separation curves, the antiphase boundary energies have been determined as a function of composition fo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntermediate-spin (S = 3/2) porphyrinatoiron(III) complexesDavid H. Dolphin, John R. Sams, and Tsang Bik. TsinCite this: Inorg. Chem. 1977, 16, 3, 711–713Publication Date (Print):March 1, 1977Publication History Published online1 May 2002Published inissue 1 March 1977https:/…
Abstract and Summary The photo‐sensitized oxidation of methyl linolenate and methyl oleate was studied using erythrosine and riboflavin as sensitizers. The complex mixtures of hydroperoxides obtained were analyzed for the proportion of conjugated products and, after reduction to the corresponding mixtures of hydroxyst…
MnBi particles were prepared by grinding sintered MnBi in a ball mill. The coercivity of these MnBi particles was measured at 300 K and 85 K. At 300 K, the coercivity increased remarkably by grinding, and showed the highest value of 16000 Oe. At 85 K, the coercivity was very low compared with that at 300 K, and was ab…
The influence of water vapor pressure on the equilibrium sodium vapor densities over well‐stirred silica‐based glass melts was investigated. Sodium was assumed to be present in the vapor as Na and NaOH molecules, and the activity of Na.O in the melt was calculated as a function of water vapor pressure above the melt.
Electron paramagnetic resonance studies of Mo3+ ion in NH4Al(SO4)2⋅12H2O single crystals are made at X-band frequencies and at room temperature. It is found that there are four magnetically inequivalent complexes of Mo3+ ion in the lattice which exhibit tirgonal symmetry. The angular variation of the fine structure li…
The program discussed was designed to improve weld quality in Ti-662 sheet. The approach was based on establishing an alloy addition which could be introduced to the weld puddle via the welding filler metal and would provide a relatively homogeneous fine precipitate for grain size control. Yttrium was selected because…
Abstract The work reported here concerns the peroxide crosslinking of ethylene–vinyl acetate rubber. Calculated values for scission‐to‐crosslinking ratios are higher for EVA than for low‐density polyethylene. In the temperature range from 150 to 200°C at a constant peroxide content, a rise in temperature results in a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, and electrochemistry of a new platinum "tetrathiolene" cluster, tetrakis(triphenylphosphine)tetrathionaphthalenediplatinum(II,II): a novel system with five reversible oxidation statesBoon-Keng Teo, F. Wudl, J. H. Marshall, and A. KrugerCite this:…