Materials Literature
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<div class="htmlview paragraph">To aid in better assessing the corrosion performance of AZ91 die cast magnesium, standard salt spray corrosion tests have been made on both randomly selected commercial die castings and on three series of controlled purity test panels. The results reveal that the poor performance…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeterojunction silicon/indium tin oxide photoelectrodes: development of stable systems in aqueous electrolytes and their applicability to solar energy conversion and storageG. Hodes, L. Thompson, J. DuBow, and K. RajeshwarCite this: J. Am. Chem. Soc. 1983, 105, 3, 324–330Pub…
Our simple instrumentation for generating a UV-microbeam is described UV microbeam irradiations of the central spindle in the pennate diatom Hantzschia amphioxys have been examined through correlated birefringence light microscopy and TEM. A precise correlation between the region of reduced birefringence and the UV-in…
Abstract Differential scanning calorimetry was used to determine the miscibility behavior of several polyester/Saran blends, the two polymers forming these blends being semicrystalline. It was found that Saran is miscible with polycaprolactone (PCL), polyvalerolactone, poly(butylene adipate), and poly(hexamethylene se…
When used as drug carriers, anionic liposomes can reduce the chronic cardiac toxicity and increase the antileukemic activity of doxorubicin (DXN; Adriamycin). Continuing investigations, reported here, have now established the therapeutic benefits of this mode of drug delivery. Liposome encapsulation caused a prolonged…
The three minerals are polymorphs of the compound: (Ca,Na, REE, Th..) 2 VIII Zr 2 VII (Ti,Nb,.) 3 VI (Fe,Ti) (super V,IV) O 14 . The crystal structures of polymignyte, zirkelite and zirconolite may be derived from that of pyrochlore. Chains, formed by distorted (Ca,REE..) cubes alternating with (Ti,Nb..) octahedra in…
Abstract The structure and mechanical properties of blends of low‐density polyethylene and isotactic polypropylene were studied. The blends behaved like a simple composite obeying the rule of mixture for the modulus dependence on composition. Tensile strength of the LDPE was enhanced with the addition of PP but elonga…
Abstract Four aromatic dinitro compounds containing oxyethylene units 1,2‐bis(4‐nitrophenoxy)ethane, bis(2)‐(4‐nitrophenoxy)ethyl ether, 1,2‐bis(2)‐(4‐nitrophenoxy)ethoxy)ethane, and bis(2‐(2‐(4‐nitrophenoxy)ethoxy)ethyl) ether were prepared by an aromatic nucleophilic substitution reaction that involved 1‐fluoro‐4‐ni…
Extensive single-crystal Mo Kct Bragg-diffraction data sets were collected and analyzed from sigma (a) phases with compositions near Cr4sFe52 that had been annealed at three temperatures (1063, 1013 and 923 K) within the region of a-phase metastability. Precisions of measurement varied from <1% for the relatively few…
Abstract Infrared (IR) spectra in the fundamental and near-IR regions were obtained for Na-saturated Wyoming montmorillonite and reduced-charge Na/Li-saturated Wyoming montmorillonites hydrated under water vapor at 50% RH and dehydrated under vacuum. For the Na-montmorillonite, changes in the intensities of the struct…
Experiments have shown that bubbles approaching an air–water interface give rise to axisymmetric jets projected upwards into the air. Similar jets occur during the collapse of cavitation bubbles near a solid surface. In this paper we show that such jets are well modelled by a Dirichlet hyperboloid, a hyperbolic form o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHalogen oxidation of tetrakis(dithioacetato)diplatinum(II) complexes, Pt2(CH3CS2)4. Synthesis and characterization of Pt2(CH3CS2)4X2 (X = Cl,Br,I) and structural, electrical, and optical properties of linear-chain (.mu.-iodo)tetrakis(dithioacetato)diplatinum, Pt2(CH3CS2)4ICa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic interactions in chloro-bridged copper(II) dimers. Structural and magnetic characterization of bis(.mu.-chloro)bis[chloro(N,N,N'-triethylethylenediamine)copper(II)], [Cu(Et3en)Cl2]2Wayne E. Marsh, Kantilal C. Patel, William E. Hatfield, and Derek J. HodgsonCite this:…
The major source of radiation effects in solid nuclear waste forms is from the alpha decay of the actinide elements. These radiation effects have generally been investigated by doping simulated waste forms with short-lived actinides. Although measurable changes in volume, stored energy, and microstructure occur, no si…
A solution of spiroindolinonaphthoxazine in a common organic solvent shows profound photochromic effect. The colorless form in ethanol displays three absorption bands (~320, 235, 203 nm) in the ultraviolet region of the spectrum. The absorption spectrum of the colored metastable form shows two prominent absorption pea…
Abstract During the last decade modern preparative and structural methods have led to novel and often unexpected oligomeric and polymeric main group element‐sulfur compounds having remarkable bonding and structural properties and reactivities. Examples of important new developments in this area are: the discovery of b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of electron exchange and single-file diffusion on charge propagation in Nafion films containing redox couplesDaniel A. Buttry and Fred C. AnsonCite this: J. Am. Chem. Soc. 1983, 105, 4, 685–689Publication Date (Print):February 1, 1983Publication History Published onl…
The size of a cation is important in determining its site preference. In oxide spinels containing 2 (super +) and 3+) ions (2-3 spinels) there is a tendency for the larger ion to prefer the tetrahedral site; the reverse holds for 2-4 spinels. A set of cation radii optimized to best fit spinel lattice parameters is pre…
A simple definition of random close packing of hard spheres is presented, and the consequences of this definition are explored. According to this definition, random close packing occurs at the minimum packing fraction $\ensuremath{\eta}$ for which the median nearest-neighbor radius equals the diameter of the spheres.…
Measurements of the frequency dependence of the microscopic second-order nonlinear electronic susceptibility are reported for the organic system $p$-nitroaniline. The results are suitably described in terms of a theoretical microscopic mechanism involving highly charge-correlated electron states dominating the second-…