Materials Literature
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Ceria-supported rhodium catalyst exhibited high activity to decompose nitrous oxide. An introduction of water in the reaction gas remarkably retarded the reaction; the catalyst, however, readily regained its activity when water was removed. On the other hand, oxygen had only a small detrimental effect. ESCA analysis a…
This paper outlines the development of a 500 kV DC oil-filled submarine cable capable of transmitting 2800 MW with /spl plusmn/500 kV 2800 A bipole system. Polypropylene laminated paper (PPLP) was employed as the insulation material, which is the world's first application to DC cables. The conductor size is 3000 mm/su…
Reactions of the previously reported dinuclear vanadium(III) thiolate anion [V(2)(edt)(4)](2)(-) (edtH(2) = ethane-1,2-dithiol) are described. Treatment of (NEt(4))(2)[V(2)(edt)(4)] (1) in MeCN with equimolar (C(12)H(8)S(2))BF(4) (C(12)H(8)S(2)(+) = the thianthrenium radical cation) results in a one-electron oxidation…
Transient currents in cross-linked polyethylene (XLPE) have been investigated by using different parameters: temperature T, electrical field E/sub p/ and hydrostatic pressure P. Anomalous discharging currents flowing in the same direction as charging currents were observed from T=30 to 70/spl deg/C, P=0.1 to 30 MPa an…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTTransformation of Poly(S-aryl thioester) by Insertion of Thiiranes: A Novel Approach To Achieve the Synthesis of Sequence-Ordered PolymersAtsushi Kameyama, Yasuharu Murakami, and Tadatomi NishikuboView Author Information Department…
We report the results of particle growth in a polydisperse blend system as a function of (i) heat treatment temperature (190, 220, 250, and 280 °C) and (ii) time of heat treatment (0−290 min) for three blends of isotactic polypropylene and linear low-density polyethylene, prepared by melt extrusion. To a first approxi…
A series of new, kinetically stable, crystalline superlattice compounds containing integral number of intergrown dichalcogenide layers were prepared through controlled crystallization of Ti/Se/Nb/Se superlattice reactants with designed compositional modulation. Discussed in this paper is a family of structural isomers…
The kinetic aspects of polymer adsorption on surfaces are important in many practical applications. Usually, the dynamic conformational behavior of an adsorbed polymer is not measured directly but is interpreted from changes in the thickness of the layer or in the adsorbed amount. Infrared spectroscopy is now used to…
The effect of the microstructure of the base steel on the formation and growth behavior of intermetallics on interstitial free steel during galvanizing under various processing conditions (substrate entry temperature, Al content in galvanizing bath) was investigated from the viewpoint of the surface morphology of the…
The probability distribution functions Ps(r) of the distance r between the end points of subchains of a single excluded volume chain in two and three dimensions were studied using the bond-fluctuation model. The index s refers to three principle cases. Case s=0: the subchain is identical to the whole chain. Case s=1:…
In order to test the proposal [Stehle, T., Claiborne, A., & Schulz, G. E. (1993) Eur. J. Biochem. 211, 221-226] that the active-site His10 of NADH peroxidase functions as an essential acid-base catalyst, we have analyzed mutants in which this residue has been replaced by Gln or Ala. The k(cat) values for both H10Q and…
The rate of microwave-induced regeneration of nitrogen oxides (NO x )-saturated char was studied. A small amount of NO x -saturated char sample was placed in the microwave field, and its weight was measured as a function of time by a digital balance. The weight loss data were used to calculate the activation energy of…
Well-defined X-ray fiber patterns of l - and d -ascorbates of chitosan were obtained by immersing a tendon chitosan, prepared from a crab tendon chitin by a solid-state N -deacetylation, in respective ascorbic acid water−isopropyl alcohol solutions, and heating them at 70 °C. The crystalline unit cell of the l -ascorb…
The structural properties of the layered oxides Ba2SnO4 and Sr2SnO4 have been studied as a function of temperature by high resolution powder neutron diffraction. As a result of excellent size matching between the SnO2 and Ba2O2 layers, Ba2SnO4 adopts the tetragonal K2NiF4 structure (space group I4/mmm) and undergoes n…
It is a common practice to serve combination three-phase and single-phase loads from an unsymmetrical three-phase transformer bank and a four-wire secondary. Depending upon the loads and company standards, nine different transformer connections can be considered along with either an open four wire or a quadraplex seco…
The morphology of the oxidized form of electrodeposited polyaniline films (PANI) grown on platinum under potentiodynamic cycling has been studied by scanning force microscopy (SFM). For average film height 〈h〉 < 100 nm, the nucleation and growth of PANI without a change in the surface roughness was observed. For the r…
The present paper deals with the fouling process of calcium sulfate dihydrate on heat transfer surfaces. The crystallization of calcium sulfate showed typical asymptotic fouling curves, the asymptotic value of which was greatly influenced by the surface temperature and fluid velocity. The fouling mechanism was discuss…
Single crystals of the compounds Ba 2 MCl 7 (M = Gd−Yb, Y) can be grown from stoichiometric melts of the binary chlorides using the Bridgman technique. The crystal structure of Ba 2 ErCl 7 and Ba 2 GdCl 7 was determined by direct and Fourier methods using single crystal X-ray diffraction data [Ba 2 ErCl 7: monoclinic,…
Hot steam corrosion tests were performed on heat-treated Al coated NdFeB magnets. The results suggest that the corrosion process can be divided into different stages. Initially, Nd which diffuses across the Al coating from the Nd-rich grain boundaries of the magnet during annealing, reacts with the moisture forming ei…
Specimen preparation for transmission electron microscopy (TEM) of twins in B19′ martensite in the edge-on state of polycrystalline Ti–Ni shape memory alloys was proposed utilizing the recrystallization texture of cold-drawn rod and the parent-martensite lattice correspondences. The five twinning modes, i.e. 〈011〉 Typ…