Materials Literature
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Cl2GaP(SiMe3)22 (1) has been prepared form the 1:1 reaction of GaCl3 with P(SiMe3)3. Thermal decomposition of 1 produces a brown powder which contains GaP, as evidenced by an X-ray powder pattern and partial elemental analysis. Compound 1 crystallizes in the monoclinic space group P21/n ( 14) with a - 9.754(2), b = 15…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective anion inclusion in calix(4)arene complexes driven by face-bridging .mu.4-halide bindingWei Xu, Jadagese J. Vittal, and Richard J. PuddephattCite this: J. Am. Chem. Soc. 1993, 115, 14, 6456–6457Publication Date (Print):July 1, 1993Publication History Published onlin…
Amorphous silicate grain boundary phases of varying chemistry and amounts were added to 3Y‐TZP in order to determine their influence on the superplastic behavior between 1200° and 1300°C and on the room‐temperature mechanical properties. Strain rate enhancement at high temperatures was observed in 3Y‐TZP containing a…
The resistivities in Al 70 Pd 20 Re 10 alloy of the icosahedral phase are quite sample dependent, possibly due to slight variation of the alloy composition. In some samples, the resistivity at room temperature is ∼0.01 Ω·cm and that at 4.2 K is as high as ∼0.1 Ω·cm; these values are much higher than any values reporte…
Abstract The donor-acceptor type molecular conductor, α-(EDT-TTF)[Ni(dmit)2], was found to be a superconductor under ambient pressure below 1.3 K. This is the first ambient-pressure superconductor in a series of M(dmit)2 salts [M = Ni, Pd, Pt]. The sample dependence and magnetic-field dependence on the superconducting…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControlled electron transfer between cyclodextrin-sandwiched porphyrin and quinonesYasuhisa Kuroda, Mitsuru Ito, Takashi Sera, and Hisanobu OgoshiCite this: J. Am. Chem. Soc. 1993, 115, 15, 7003–7004Publication Date (Print):July 1, 1993Publication History Published online1 M…
The thermal decomposition of lanthanum(IIl) and cerium(IV) chelates of dibenzoylmethane anthranilic acid was studied by TG. The mechanism of the decomposition reactions were found to be random nucleation as established from TG data. Activation energies, E, pre-exponential factors, A, entropy of activation, ΔS, orders…
ABSTRACT Sorption characteristics, rates and capacities of polymeric adsorbents (XAD‐4, XAD‐7, XAD‐16, Duolite ES‐865, Duolite S‐761, Porapak‐Q and XUS‐43436) for ethyl butyrate and octanal were determined using model solutions. Sorption of these two principal components of aqueous orange essence, was evaluated utiliz…
Fracture Toughness of HIP-sintered silicon nitride decreased with increasing temperature up to 1200°C. The brittle-to-ductile transition was observed in the temperature range from 1200°C to 1275°C: the fracture toughness rapidly increased in the transition region. Above the transition temperature, the fracture toughne…
Effects of alloying on the anodic polarization of a low interstitial, 18% chromium (Cr) ferritic stainless steel in sulfuric acid (H2SO4) were examined. Vanadium (V) from 1 to 4% was added alone and with up to 1.5% nickel (Ni), silicon (Si), copper (Cu), and molybdenum (Mo). The carbon (C) and nitrogen (N) level varie…
The blown film process is a complex manufacturing process in which film properties are found to be greatly influenced by the fabrication vari ables from which the film was produced. This article will focus on the control of these variables to demonstrate the methods of process control used for op timization of film pr…
Natural (molybdenite) and synthesized molybdenum disulfide crystals have been studied by high-resolution transmission electron microscopy. The image simulation demonstrates that the [0001] and [0110] HRTEM images of hexagonal and rhombohedral MoS2 crystals hardly disclose their stacking sequences, and that the [2110]…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of large polar side groups on the glass transition temperature of acrylic copolymersAlberto Gallardo and Julio San RomanCite this: Macromolecules 1993, 26, 14, 3681–3686Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inissu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBicyclo[3.2.2]non-1-ene: matrix isolation and spectroscopic characterization of a moderately strained bridgehead olefinMurthy S. Gudipati, Juliusz G. Radziszewski, Piotr Kaszynski, and Josef MichlCite this: J. Org. Chem. 1993, 58, 14, 3668–3674Publication Date (Print):July 1…
Abstract The most effective chemical blowing agents for producing cellular rubber products are ADCA, activated forms of ADCA, OBSH and DNPT. Blends of ADCA types and OBSH are also used quite extensively. These blowing agents may be used to make automotive weatherstripping, various types of athletic padding, insulation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProbing the role of lysine 16 in ras p21 protein with unnatural amino acidsHyun Ho Chung, David R. Benson, and Peter G. SchultzCite this: J. Am. Chem. Soc. 1993, 115, 14, 6414–6415Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published in…
Abstract This paper describes the effect of three natural zeolite-containing pozzolanic admixtures on expansion of mortar bars caused y alkali-silica reaction (ASR). Heulandite is present in all three samples, and clinoptilolite may be also present in one sample. Silica is also present in all three samples, but the mi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic model for tensile deformation of polymers. 5. Effect of temperature on orientation efficiencyYves Termonia and Paul SmithCite this: Macromolecules 1993, 26, 15, 3738–3741Publication Date (Print):July 1, 1993Publication History Published online1 May 2002Published inis…
Eight individuals with an unusual dwarfing skeletal dysplasia have been investigated in a remote rural area in Northern Zululand, South Africa. These dwarfed individuals are members of a community numbering some 10,000 persons; approximately 20% have a degenerative arthropathy affecting mainly the major joints of the…
Photoluminescence studies have been carried out on several amorphous poly(p-phenylene sulfide) (PPS) films using a frequency-tripled pulsed Nd:(yttrium aluminum garnet) laser at 355-nm wavelength. The main luminescence is attributed to the ${\mathrm{\ensuremath{\pi}}}^{\mathrm{*}}$\ensuremath{\rightarrow}\ensuremath{\…