Icosahedral Matrix Representations as a Function of Eulerian Angles
The obtaining of the representative matrices of the I icosahedral rotation group by means of the descent symmetry from the K group of rotations of the sphere.
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Thermal Conductivity of CuSbSe2and CuBiSe2in the Solid and Liquid State
Thermal Conductivity of CuSbSe2 and CuBiSe2 have been studied in the solid and liquid state in a wide range of temperatures. Measurements of thermal conductivity were carried out using the concentric cylinder method which is based on the flow of heat through a cylindrical wall.
Reaction between HC1 and orthophthalates of lead in hot DOP without PVC, and stabilization in plasticized PVC
Abstract Reactions between hydrogen chloride, HCl, and either hydrocerussite, 2PbCO 3 . Pb(OH) 2 , or an orthophthalate of lead suspended in di(2‐ethylhexyl)phthalate, DOP, at 180°C are discussed as models of what should happen during the stabilization of PVC if thermal dehydrochlorination were to yield HCl. There is…
Treatment of asymmetric SANS data
Abstract Small‐angle neutron scattering (SANS) is a useful technique for investigating the anisotropy of density fluctuations when these have single orientation direction. The commonly used method for treating asymmetric SANS data is to analyze sectors of data parallel and perpendicular to the orientation axis. Other…
Kinetic study of reaction between zirconium and iodine
Stress corrosion cracking (SCC) of zircaloy cladding is generally believed to be the major failure mode of current nuclear fuel in light water reactors. Iodine, an abundant fission product, has been identified to possibly cause zircaloy to become susceptible to SCC. An understanding of the kinetics of the reaction bet…
Electron paramagnetic resonance in investigations of ferroelastic domain structure
An application of the EPR method to investigation of the ferroelastic domain structure is presented. The relations between the symmetry elements of the high temperature and the ferroelastic phases have been described in the case of EPR of Cr3+ admixture ions in KSc(MoO4)2 and KH3 (SeO3)2.
Preparation, Properties, and Development of Calcium Lanthanum Sulfide as an 8- to 12-micrometer Transmitting Ceramic
The purpose of this report is to document work done on the development of calcium lanthanum sulfide (CaLa2S4) as an infrared (IR) dome material for use in the 8- to 12-micrometer region.
Molecular mechanics (MM2) calculations on siloxanes
Abstract The MM2 force field has been extended so that calculations may be carried out on siloxanes. The parameters chosen give a good fit to available experimental data.
Mixed Intermediate Effect in Calcium Alumino/Galliosilicate Glasses
Glasses in the calcium alumino/galliosilicate system were prepared. All glasses contained 30 mol% CaO. The density, refractive index, and infrared spectra were measured. These glasses exhibited additive behavior in all properties, which implies that Al and Ga play isostructural roles in the glass network. These result…
Die Kristallstruktur von Li3Bio3 [1]
Abstract Erstmals wurde farbloses Li 3 BiO 3 dargestellt, das triklin, P 1 , mit a 902,38(35) pm, b = 973,02(48) pm, c = 923,53(46) pm, α = 114,069(38)°, β = 89,291(36)°, γ = 107,504(35)°, Z = 8 kristallisiert. Die Parameter wurden nach “least squares” (3565 von 3969 I° (hkl)) verfeinert, R = 7, 86%, R w = 6,93%, Mok…
Performance and Emissions of a DDC 8V-71 Engine Fueled with Cetane Improved Methanol
<div class="htmlview paragraph">A study was conducted to determine the feasibility, performance, and emissions of a Detroit Diesel Corporation 8V-71 transit bus engine using ignition-improved methanol as fuel. Major objectives to be achieved by the study were: 1) to determine the minimum amount of ignition impro…
Liquid detergents from cationic, anionic and nonionic surfactants. adsorption, detergency and antistatic properties
Abstract The adsorption of a mixture of cationic (c) and anionic (a) surfactants on cellulose fibers is highly dependent on the molar ratio a/c with a maximum at a/c = 0.9. When a/c is > 1.1 the adsorption is negligible. The presence of nonionic surfactants in the solution impairs the adsorption of the ionic specie…
Properties and structure of soda-lime aluminosilicate glasses
The properties of soda-lime aluminosilicate glasses have been measured for several series of glasses containing a constant silica content, with varying ratios of soda to lime and of modifier oxides to alumina. The results demonstrate that a systematic variation in the effect of modifier ions occurs as lime replaces so…
Partitioning of Clay‐Sized Minerals in Coastal Plain Soils with Sandy/Loamy Boundaries
Abstract Four soils with sandy/loamy boundaries occurring at various depths were studied with respect to distribution of clay‐sized minerals within the soil matrix. Mineralogy of coarse and fine clay was determined by horizon using x‐ray diffraction. Also, mineralogy of clay from ped interiors vs. exteriors (coatings)…
Nature of porphyrins in kerogen. Evidence of entrapped etioporphyrin species
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNature of porphyrins in kerogen. Evidence of entrapped etioporphyrin speciesAssem O. Barakat and Teh Fu YenCite this: Energy Fuels 1989, 3, 5, 613–616Publication Date (Print):September 1, 1989Publication History Published online1 May 2002Published inissue 1 September 1989htt…
Prediction of Birefringence for Optical Memory Disk
Abstract Polycarbonate (PC) is considered to be a proper resin for optical memory disk, however PC resin shows high birefringence. It is very important to reduce birefringence of PC optical memory disk. This research is to obtain the relationship between birefringence and process conditions and to get the optimum cond…
Form and development of the umbilical cord in pigs and their association with delivery of viable pigs
Length, extensibility, and absolute strength of umbilical cords were determined in litters of pigs at term. Length was also determined in fetuses earlier in gestation and in hypophysectomized fetuses. Mean cord length at term was 34.6 cm (range, 17 to 50 cm) and its length was correlated with length and birth weight o…
Resonance Raman excitation profile of cobalt phthalocyanine at room temperature and 10 K
Abstract Resonance excitation profiles have been obtained for cobalt phthalecyanine at both room temperature and 10 K using a compressed disc of silver and the phthalocyanine. Low‐frequency vibrations are shown to be influenced mainly by displacements on the bonding nitrogen, but high‐frequency vibrations show a more…
Curvature of gypsum crystals induced by growth in the presence of impurities
Abstract Gypsum crystals were grown at 25, 35, and 45 °C from solutions containing different ionic impurities (Mg 2+ , Na + , Cd 2+ ). Curved gypsum crystals formed from the solutions enriched in magnesium or cadmium, whereas, in the presence of sodium, gypsum always grew undeformed. The mechanism of the curvature is…
Thermodynamics of the glass transition
Abstract A thermodynamic analysis of the glass transition in polymers is presented, which predicts, with a minimum of assumptions, three of the four inequalities which have consistently been observed experimentally: i.e., that specific heat and isothermal compressibility of the glass are lower than those of the rubber…