Materials Literature
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Dielectric problems of SF6 gas insulated DC apparatuses were investigated. The DC breakdown voltages of the SF, gas gap become lower with larger electrodes. The decrease can be estimated fairly well for electrode areas of 101 to 104 cm2 on the basis of the statistical distribution of the initial breakdown field streng…
The conduction current to a probe incorporated into an electrode is proportional to the strength of the charge-carrier drift field; this current is modulated by a bias voltage applied betwen the probe and the electrode. The current/bias-voltage probe characteristics are described which have been derived from computati…
Abstract Alumina coated with potassium fluoride was found to be an effective and practical reagent for the synthesis of some simple crown ethers.
Abstract The marked discolorations observed on aged poly(vinyl chloride) (PVC) containing synergetic metal soaps, in the early heating stage, were due to the excessive coloration of π complex of metal chloride and double bonds in the polyene chain. These excessive colorations were inhibited by masking the excessive me…
The inner winding of a power transformer is subjected to radial electromagnetic forces under short circuit conditions. When these forces exceed a certain limit, transformer windings buckle. This paper deals with the buckling strength analysis of transformer windings, including the evaluation of the bending stiffness o…
Ferrous artifacts may have been manufactured from wrought iron, steel or cast iron. Heating such artifacts can cause changes in their metallurgical structures. The effects of heating and cooling ferrous material in different atmospheres is studied and recommendations made concerning types of ferrous artifacts which sh…
The infection of Pseudomonas acidovorans with bacteriophage phi W-14 leads to the gradual disappearance of dTTP from the cells and to the appearance of hydroxymethy dUTP (hmdUTP). Infected-cell contain dUMP hydroxymethylase and activities converting hmdUMP to humdUDP and hmdUTP. Hydroxymethylase appears immediately af…
The motion involved in the operation of an oscillating rheometer was analyzed, and revealed that the instrument measured a complex mixture of an instrument-dependent parameter, the spring constant, and two material-dependent parameters--the dynamic viscosity and the shear storage modulus. The significance of the worki…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExchange coupling in copper dimers with purine ligandsD. Sonnenfroh and R. W. KreilickCite this: Inorg. Chem. 1980, 19, 5, 1259–1262Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 May 1980https://pubs.acs.org/doi/10.1021/…
The ESR spectra of tetragonal-octahedral dichlorotetrakis(pyridine)- and dichlorotetrakis(pyrazole)cobalt(II) have been recorded. The former yields 811 = 3.33 and g, = 4.46, and the latter yields gl = 2.14, gz = 4.55, and g3 = 5.83. The g values of tetragonal-octahedral complexes are related to the bonding abilities o…
An analytical model of the satellite photosheath is obtained in the presence of spacecraft charging. The combined potential is described by a combination of monopole and dipole contributions. This simple monopole‐dipole model predicts the saddle point behavior found in computer simulations. Applications to daylight ch…
The chemical potential μ and the kinetics of the nearest-neighbour-site-exclusion simple-cubic lattice gas have been investigated using the Monte Carlo method. The existence of a second-order phase transition at a reduced density of 0-43 and with μ/kT = 0.06 has been verified. It is shown that the Haven ratio, the rat…
SUMMARY The growth of individuals from a copper‐tolerant and a non‐tolerant population of Ectocarpus siliculosus (Dillw.) Lyngbye, in media containing copper (0.10 mg 1 ‐1 ), cobalt (0.10 mg 1 ‐1 ), zinc (0.25 mg 1 ‐1 ) or cadmium (1.50 mg 1 ‐1 ) was measured using a wet wt method. The copper‐tolerant population was f…
Abstract The ability of adsorbing iodine in different organic solutions by chitosan was studied by sorption isotherm measurements. The ability was found to be larger in polar solvents than in nonpolar solvents. The form of the chitosan samples, such as film, powder, and flake, had no influence on the adsorption behavi…
Esters in the homologous series 4-alkoxyphenyl 4'-alkylbenzoates, 1a, have been synthesized with both straight and methyl-branched R-groups from C3-C6, plus n-C9 and n-C10 and with straight chain R'O-groups = C1-C8, C10, C12, C14 and C16. The mesophase transitions and properties were studied by hot-stage microscopy; D…
Thalassiosira oestrupii (Ostenfeld) Hasle was studied from the southern Indian Ocean, Wed-dell Sea, and northern Atlantic Ocean. It has the longer extension of the strutted process inwards, with three small columnar supports. A single strutted process near the central areola is 2-3 areolae away from the single labiate…
Abstract One hundred years ago, Edison succeeded in preparing carbon fibers for his incandescent lamp bulb by thermal decomposition of natural polymeric fibers. Ten years ago, progress reports about “Novel Forms of Carbon” predicted outstanding properties and promising new applications for the carbonization products o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoemission studies of electron localization at very low excess energiesH. Neff, J. K. Sass, H. J. Lewerenz, and H. IbachCite this: J. Phys. Chem. 1980, 84, 10, 1135–1139Publication Date (Print):May 1, 1980Publication History Published online1 May 2002Published inissue 1 M…
A novel recording process for the formation of phase volume holograms at up to 1500 cycles/mm is described. The term silver halide (sensitized) gelatin or SHG denotes an all-gelatin phase material, which records the initial image information through photon absorption by the silver halide. Our process uses a reversal b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and physical properties of hexakis(isothiocyanato)technetate(III) and -(IV) complexes. Structure of the [Tc(NCS)6]3- ionH. S. Trop, A. Davison, A. G. Jones, M. A. Davis, D. J. Szalda, and S. J. LippardCite this: Inorg. Chem. 1980, 19, 5, 1105–1110Publication Date (…