Materials Literature
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Polarized absorption spectra of centrosymmetric neodymium hexakis-antipyrine tri-iodide single crystals at 77 and 20\ifmmode^\circ\else\textdegree\fi{}K have been discussed. The spectrum is complicated by the appearance of a large number of vibronic lines. A phase transition destroying the inversion symmetry occurs be…
Abstract and Summary Lactitol was oxyalkylated with propylene or ethylene oxide. The resulting ether‐alcohols were transesterified with a series of fatty acid esters in order to produce long chain ether‐esters of lactitol. These compounds were found to be more water soluble than related lactitol derivatives prepared b…
The threshold fields of laser-induced breakdown in dielectric liquids (dimethyl silicon oil and linear hydrocarbon liquids) were experimentally studied as the functions of increasing molecular weight and decreasing temperature and found to decrease. By comparison, slightly increase. From these results, laser-induced b…
Longitudinal and transverse magnetostrictions along the a , b and c axes of SmFeO 3 and YFe 1- x Co x /2 Ti x /2 O 3 (0.004≦ x ≦0.012) were measured. In both of the orthoferrites, the magnetostriction increases in magnitude near the spin reorientation temperature region, reaching maximum value of Δ l / l ∼15×10 -6 und…
An apparatus is described for the investigation of chemically stimulated, photostimulated and tribostimulated exoelectron emission. Emphasis was placed on tribostimulated emission from uniaxially deformed oxide-covered metals (aluminium, titanium and nickel). Experiments were performed in either ultra-high vacuum or a…
Major types of defects appearing in calendered films and sheets are described. The conditions for the appearance of air bubbles and mattness were studied for the particular case of calendering crystal-clear, rigid, toughened PVC. A correlation was found between the presence of air bubbles in the film and a distributio…
A climb model of extended dislocations based on jog pair nucleation is proposed. The energy of an extended jog pair is computed for different stacking fault energies. The results show a critical jog size from which the extended jog pair may develop by glide. This critical size is related to the stacking fault energy.…
Using a power-law viscosity, then connecting power-law fluid and thermo-dependence of the viscosity, we compute the applied stresses between the rollers during calendering (pressure curve-maximum pressure and shear stress-roll separating force and the applied opposing torque) as well as the temperature evolution of th…
The basic characteristics of secondary electron emission (SEE) from various organic compounds have been investigated, and a channel electron multiplier with high gain and flexibility has been developed. The maximum SEE yield is higher for the aliphatic compound than for the aromatic, and is higher for the organic soli…
In this paper we present a general method for calculating the transfer and transmission functions of a cylindrical mirror analyzer (CMA) which employs the exact, albeit numerical, solutions of the particle equations of motion. The analysis incorporates emission from extended sources and easily lends itself for use wit…
An immunoperoxidase method for the demonstration of carcinoembryonic antigen (CEA) in tissues was applied to formalin-fixed paraffin embedded and glutaraldehyde-fixed resin sections of normal human small intestine. CEA could easily be demonstrated coating the surface of the small intestine, lining the crypts, and in g…
A first-principles potential for an itinerant spin-polarized electron gas has allowed a more fundamental study of ground-state properties in itinerant ferromagnets. The contribution of additional terms accounting for the highly inhomogeneous spin-density profile, found in most ferromagnetic materials, is presented. Th…
Narrowing the performance deficit between design intent and real-time environmental and energy performance of buildings is a complex and involved task, impacting on all building stakeholders. Buildings are designed, built and operated with the use of increasingly complex technology and throughout their building life-c…
Measurements of centreline velocities in front of rectangular unflanged exhaust hoods, with areas between 25 and 900 cm2 and aspect ratios (ratio of slot length to its width) between 1: 1 and 16: 1 have shown that for a given face area and volume flow the velocity at a fixed point decreases as the aspect ratio increas…
The transport of fructose in Bacillus subtilis was studied in various mutant strains lacking the following activities: ATP-dependent fructokinase (fruC), the fructose 1-phosphate kinase (fruB) the phosphofructokinase (pfk), the enzyme I of the phosphoenolpyruvate phosphotransferase system (the thermosensitive mutation…
A general energy analysis formulated for the study of fabric mechanics is applied to the biaxial-deformation properties of the plain weft-knitted structure by assuming quarter-loop symmetry. The basic equations of equilibrium and the boundary conditions for plain-knitted fabrics are derived without assuming any detail…
The synthesis and spectral properties of several phosphorus complexes of tetraphenylporphine (TPP) are reported. The compounds appear to have the form (TPP)P(V)X2 +Y− as previously reported by Gouterman et al. for the analogous octaethylporphyrin (OEP) complexes. The electronic and nmr spectra show a striking dependen…
Abstract Thermal decomposition mechanisms of poly(vinyl chloride) (PVC) and the effects of a few metal oxides on the pyrolysis of PVC were previously reported. In the present work, 33 metal oxides were investigated to determine their effects on the thermal decomposition of PVC, by using a pyrolysis gas chromatograph.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluxional behavior of potentially bidentate phenanthroline, bipyridine, naphthyridine, pyridazine and phthalazine ligands in platinum complexesKeith R. DixonCite this: Inorg. Chem. 1977, 16, 10, 2618–2624Publication Date (Print):October 1, 1977Publication History Published o…
Defect energy was calculated as a function of dihedral angles of the bonds in a point dislocation for sequences of conformations that resulted in motion of the dislocation along the polyethylene chain. Paths that presented low barriers to diffusive motion of the defect were found by incrementing, in a particular seque…