Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPentacoordinate hydridosilicates: synthesis and some aspects of their reactivityRobert J. P. Corriu, Christian Guerin, Bernard Henner, and Qunjie WangCite this: Organometallics 1991, 10, 7, 2297–2303Publication Date (Print):July 1, 1991Publication History Published online1 M…
Abstract The synthesis of four bisphenol A‐based polyphosphates and phosphonates was accomplished. The polymerization involved a condensation between bisphenol A and a phosphorodichloridate. The heterophasic polycondensation technique was used with the aid of a phase transfer catalyst to yield molecular weights in the…
Lead concentrations in drinking water can be minimized by adjusting the pH and alkalinity. Such lead solubility controls, however, may be offset by other water treatment measures that inadvertently increase lead solubility, e.g., the adding of polyphosphate‐containing products. Through the use of solubility computatio…
The thermooptic coefficients, i.e., the change in refractive index with temperature (d n /d T ), of four National Institute of Standards and Technology standard reference material (SRM) glasses have been measured over the range of 25° to 125°C. The thermooptic coefficients of all four glasses, NBS‐710 (a soda‐lime sil…
Abstract Photochemical formation of colloidal silver, colloidal gold and silver‐gold (Ag‐Au) composite colloids under mild conditions has been studied. Irradiation of either aqueous AgCIO 4 or HAuCI 4 solution in the presence of sodium alginate (SA) with 253.7 nm light yielded colloidal silver or gold, whose particle…
Abstract The methods of pigment dispersion analysis have been reviewed in regard to their application to rubber, plastics, and other vehicle systems. The characteristics of dispersions have been divided into three categories: (1) agglomeration (2) microdispersion (networking) and (3) polymer-phase distribution. Stylus…
The fracture resistance of a fully dense, transparent, polycrystalline magnesium aluminate spinel was measured from room temperature to 1400°C using the chevron‐notched beam and the straight‐notched beam macroflaw techniques, as well as the indentation‐induced, controlled‐microflaw test method, all in three‐point bend…
The self-shielding treatment of resonant isotopes is currently performed in most lattice codes using the Stamm’ler method on simplified one-dimensional geometries. A generalization of this procedure is proposed for self-shielding calculations over the arbitrary two- and three-dimensional geometries typical of most adv…
Recently developed by CSIRO for quality control and assurance of fabrics, FAST, or fabric assurance by simple testing, consists of a series of instruments that are in expensive, robust, and simple to use, and their related test methods. FAST is specifically designed for use by tailors and worsted finishers; it measure…
The genus Calotropis of the tribe Asclepiadeae of Asclepiadaceae subfamily Ascle‐piadoideae is revised throughout its Tange in tropical and subtropical Africa and Asia. The three species recognized are keyed out, illustrated and described with appropriate bibliography, synonymy, notes on ecology, distribution and uses…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(ethylene oxide) macromonomers. 8. Preparation and polymerization of ι-hydroxypoly(ethylene oxide) macromonomersKoichi Ito, Kazuo Hashimura, Shinichi Itsuno, and Eiichi YamadaCite this: Macromolecules 1991, 24, 14, 3977–3981Publication Date (Print):July 1, 1991Publicatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon-oxygen bond scission during methanol decomposition on (1.times.1)platinum(110)Jianhua Wang and R. I. MaselCite this: J. Am. Chem. Soc. 1991, 113, 15, 5850–5856Publication Date (Print):July 1, 1991Publication History Published online1 May 2002Published inissue 1 July 1…
We have grown high-conductivity textured ZnO films by the photo-MOCVD method using DEZ (diethylzinc) and H 2 O as reactant gases. It was found that the UV light irradiation during the growth was very effective in the improvement of electron mobility. The improvement of the electron mobility could be caused by the chem…
Abstract Treatments using NaOH and Na 2 CO 3 have been widely used to remove poorly crystalline and noncrystalline aluminosilicates and hydrous oxides of Si and Al. However, NaOH treatment is often too harsh and Na 2 CO 3 treatment is usually too mild and must be repeated. Treatment using alkaline Tiron (4,5‐dihydroxy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFourier transform infrared spectroscopy study of conducting polymer polypyrrole: higher order structure of electrochemically-synthesized filmHitoshi Kato, Osamu Nishikawa, Tomoko Matsui, Seishi Honma, and Hiroshi KokadoCite this: J. Phys. Chem. 1991, 95, 15, 6014–6016Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnionic clays with variable valence cations: synthesis and characterization of cobalt aluminum hydroxide carbonate hydrate [Co1-xAlx(OH)2](CO3)x/2.cntdot.nH2OM. A. Ulibarri, J. M. Fernandez, F. M. Labajos, and V. RivesCite this: Chem. Mater. 1991, 3, 4, 626–630Publication Da…
We report the observation of both silicon and nitrogen paramagnetic defect centers using X-band and Q-band electron spin resonance microwave excitation frequencies. By using two different microwave frequencies along with a computer analysis of the resonance lineshapes, we have been able to confirm and extend earlier o…
The bioactivity-directed isolation of deoxylapachol [I] from a New Zealand brown alga, Landsburgia quercifolia, is described. Compound I was active against P-388 leukemia cells (IC50 0.6 microgm/ml) and was also antifungal. 1,4-Dimethoxy-2-(3-methyl-2-butenyl)-naphthalene [3] was the major low polarity component of ex…
An optimal set of thermodynamic functions for the ZrO 2 ─YO 1.5 system are obtained using phase diagram and thermodynamic data. The liquid is described by a subregular solution model. Both cubic ZrO 2 and YO 1.5 solid solutions are regarded as one cubic solution, which is also treated as a subregular solution. The ord…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of poly(p-phenylene sulfide) growth from p-dichlorobenzene and sodium sulfideDarryl R. Fahey and Carlton E. AshCite this: Macromolecules 1991, 24, 15, 4242–4249Publication Date (Print):July 1, 1991Publication History Published online1 May 2002Published inissue 1 Ju…