Materials Literature
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ABSTRACT A kinetic compensation effect was observed for acid‐catalyzed hydrolysis of a series of disaccharides. Twelve data sets for acid hydrolysis of three disaccharides reported in the literature were analyzed and compensation parameters were determined. The results are well described by following empirical compens…
Abstract This paper provides a summary of four EPRI‐sponsored contracts that studied the physico‐chemical characteristics and thermal and electrical behavior of unaged and service‐aged crosslinked polyethylene (XLPE)—insulated cables, and sections of the insulation obtained from this extruded cable. It has been demons…
The effect of quench rate in terms of the circumferential wheel speed and temperature of the melt when ejected on crystallographic orientation were studied for Nd-Fe-B melt-spun magnets. It was found that the temperature of the melt (T/sub m/) is the dominant parameter affecting the preferred orientation of the tetrag…
—The interfacial reactions of galvanized steel with a poly(vinyl chloride) adhesive formulated with epoxy resin and dicyandiamide have been studied using X-ray photoelectron spectroscopy (XPS). The dicyandiamide was observed to segregate partially to the adhesive/substrate interface. A small amount of amine hydrochlor…
Abstract New architectural graft copolymers were prepared, that is, the graft chains were situated in terminal or center position of the backbone chain. These graft copolymers were termed block‐graft copolymers. Two different block‐graft copolymers were prepared from a “grafting onto” process and a “grafting from” pro…
Isothermal oxidation tests of Zircaloy-4 have been performed in steam/argon mixtures at the temperatures of 1,000–1,490°C to study the oxidation behavior of fuel cladding under severe accident condition in LWRs. The change in mass increase of oxidized specimens was related to the concentration of steam in the atmosphe…
A condition for obtaining bistable states in a liquid-crystalline ferroelectric (S*C) has been found by computer simulation and analytical estimates; it depends on the value of the applied electric field, the magnitude of the polar contribution to anchoring energy and the material parameters of S*C
The work develops the general formalism to switch from a geometrically defined body-fixed frame, like the bisector frame, to the Eckart frame. The derived analytical formula for the axis-switching angle between the bisector and Eckart frames of an arbitrary ABC nonlinear molecule is used to parametrize the set of stan…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
The 76 CVE (cluster valence electron) species [PtIr4(CO)14]2- (l), obtained by the reductive carbonylation of a mixture of Na2PtC16 and IrC13.xH20 or Ir4(CO)12, is in equilibrium with the 72 CVE species [PtIr4(CO)12]2-(2) through the dissociation-association of two carbonyl ligands. Both anions were characterized by t…
The results of investigations into the cause of certain flashovers which occurred in horizontally mounted insulators in HVDC stations are described. Insulators having various shed shapes were subjected to contamination and wet tests under horizontally and vertically mounted insulators, a slight reduction was found in…
Abstract The need to consider CaCl + and MgCl + complexes in Ca‐Mg exchange reactions on montmorillonite was evaluated by examining cation selectivity in various anion backgrounds. The Ca‐Mg exchange isotherms on SWy‐1 Wyoming bentonite were determined in 0.0125 M SO 4 , 0.025, 0.050, and 0.100 M Cl and 0.03 M perchlo…
Photo-oxidation of unsaturated fatty acids or esters (LH = oleic acid, linoleic acid, methyl linoleate, and linolenic acid) by oxygen proceeds efficiently in the presence of a riboflavin derivative, riboflavin-2′,3′,4′,5′-tetra-acetate (Fl), in acetonitrile by a type II (singlet oxygen) mechanism with a limiting quant…
Abstract For several reasons, calibrated wheat starch is by far the best performing stilt material in carbonless copy paper. Due to its size selection and its nice globular shape, it gives excellent stilt functionality at relatively low doses compared to native wheat starch. Less binder is needed and better copy quali…
A series of porphyrins (2a)–(5a), unsymmetrically substituted in their meso-positions with 3,5-di-tbutyl-4-hydroxyphenyl(DtB4HP) and 4-hydroxyphenyl (4HP) groups, has been synthesised and characterised. The two di-DtB4HP di-4HP isomeric porphyrins, (3a) and (4a)(called ‘cis’ and ‘trans’, respectively), in particular a…
Symbols and notation. Introduction. The stiffness method using the basic equations. The stiffness method using virtual work. The stiffness method for beams and planar frames. The stiffness method for three-dimensional structures. Special topics for the stiffness method. The flexibility method. Appendices. Index.
The development of FBR fuel systems with high reliability and long in-core residence capability is required to make the fast reactor economically competitive with other electrical energy sources. PNC program of fuels and materials development has been primarily focused on mixed uranium/plutonium oxide (MOX) fuel with…
Two nonoriented low-silicon iron cores were compared. The laminations were magnetized as in an induction motor stator core, and the flux density and localized power loss measured at various flux densities using arrays of search coils and thermistors mounted on individual laminations. A uniform static radial stress of…
Initial magnetization, demagnetization, and magnetic viscosity data are presented for sintered and melt-spun NdFeB over a range of temperatures. A model based on strong domain wall pinning is used to investigate the energy barriers in operation in each case. Temperature is observed to have little effect on magnetizati…
The biocompatibility of two different titanium alloys, Ti-6Al-4V ELI and Ti-5Al-2, 5Fe, and pure titanium were evaluated. The results were as follows: 1) Titanium alloys were implanted into the dorsal subcutaneous tissues of the Hartley guinea-pig for 12 weeks, immersed in calf serum or in Ringer's solution for 8 week…