Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis and dilute solution properties of 12- and 18-arm-star polystyrenesJ. Roovers, Nikos Hadjichristidis, and Lewis J. FettersCite this: Macromolecules 1983, 16, 2, 214–220Publication Date (Print):February 1, 1983Publication History Published online1 May 2002Published in…
A method for determining the third-order nonlinear susceptibility of liquids using third harmonic generation (THG) is presented. A review of molecular polarizability and discussion of the relationship to susceptibilities are presented. All materials, including air and windows of the liquid cell, can make substantial c…
A method for the electrodeposition of thin films of cupric hexacyanoferrate on glassy carbon and tin oxide electrodes has been devised. At low scan rates, in , these films exhibit nearly ideal cyclic voltammetric current‐potential waves with a peak potential of +0.69V vs. SCE on glassy carbon. Similar to the Prussian…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilver nitrate impregnation of preparative silica gel columns for liquid chromatographyMakota. Morita, Susumu. Mihashi, Hideji. Itokawa, and Shoji. HaraCite this: Anal. Chem. 1983, 55, 2, 412–414Publication Date (Print):February 1, 1983Publication History Published online1 M…
Abstract Literature data on the average molecular weights M n , M W , M z , and/or M v for several polymers indicated that they fell outside the continuum originally proposed to model molecular weight distribution (MWD), where the log‐normal (LN) distribution, or positively valued Gex parameters m and k , define the c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelation between metal stability, charge transfer, and Raman frequencies in metalloporphyrins and their π-π complexesJ. A. ShelnuttCite this: J. Am. Chem. Soc. 1983, 105, 4, 774–778Publication Date (Print):February 1, 1983Publication History Published online1 May 2002Publ…
The process of glass formation is discussed from several perspectives. Particular attention is directed to kinetic treatments of glass formation and to the question of how fast a given liquid must be cooled in order to form a glass. Specific consideration is paid to the calculation of critical cooling rates for glass…
Crystals are sectioned, polished, etched in fluoboric acid and coated with a layer of reflecting substance. Surface relief corresponds to Ab/An compositional structure. Zones as thin as 0.5 mu m and with compositional contrast of about 1 percent An can be resolved using the method.--Modified journal abstract.
<div class="htmlview paragraph">A Ceramic Fiber Reinforced Aluminum Matrix Composite has been developed that has excellent wear resistance, seizure resistance against cast iron, good thermal conductivity and high strength at elevated temperatures, By strengthening top land and top ring groove of piston with the…
<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…