Materials Literature
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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…
Controlled expansion of high purity carbon dioxide through a nozzle forms a high velocity ‘‘snow’’ stream that effectively removes both particulate and thin film contaminants from silicon wafer surfaces [W. Whitlock, Presented at the 20th Annual Meeting of the Fine Particle Society, Boston, MA, August 22, 1989 (unpubl…
The phoochromic properties of vapor-deposited amorphous tungsten oxide (a-WO 3 ) films have been studied from the viewpoint of their dependence on film structure and water content in the films. The a-WO 3 films, prepared under different deposition conditions and postannealing temperatures, were irradiated with uv ligh…
The authors describe the results of an investigation into the withstand voltage characteristics of an insulator string covered with snow or ice and the application of these results to the insulation design and maintenance of a transmission line in a heavy snow area. It was found that the characteristics of withstand v…
The guanosine derivatives d(pG), d(GpG), d(GpGpG), d(GpGpGpG), and d(GpGpGpGpGpG), dissolved in water, give rise to cholesteric and hexagonal mesophases. These phases were investigated by X-ray diffraction, optical microscopy, and circular dichroism. The building block of these phases is a chiral rod-shaped aggregate…
Since titanium is being used for various biomedical applications requiring enhanced blood compatibility, which may be partly due to its extremely stable oxide layer, an attempt is made here to understand the effect of oxide layer thickness on protein adsorption. Different thickness of oxide layers have been coated on…