Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleVibrational study of the dynamics of n-alkylammonium chains in the perovskite-type layer compounds (CnH2n+1NH3)2CdCl4 (n = 8, 12, 16)L. Ricard, R. Cavagnat, and M. Rey-LafonCite this: J. Phys. Chem. 1985, 89, 22, 4887–4894Publication Date (Print):October 1, 1985Publication Histo…
Abstract Studies on the effect of nitrogen plasma on morphology and textile properties of mulberry silk fibers and fabrics have been conducted. The changes in the morphological structure have been monitored by transmission electron microscopy, X‐ray diffraction, and internal reflection infrared spectroscopy. The chang…
Single-crystal neutron diffraction has been used to observe the interactions between deuterated ethanol (CD3CD2OH) and lysozyme in triclinic crystals of hen egg white lysozyme soaked in 25% (v/v) ethanol solutions. A total of 6047 observed reflections to a resolution of 2 A were used, and 13 possible ethanol sites wer…
Abstract The complex degradation behavior of a poly(vinyl chloride) (PVC) cable jacketing material in combined radiation/temperature/air aging environments is experimentally separated into two dominant radiation dose‐rate effect mechanisms. The first, operative at high dose rates, involves diffusion‐limited oxidation,…
Ultrasonic determinations were made of facial tissue thicknesses in 50 healthy American caucasoid children, ranging in age from 4 to 15. Twenty measurements were taken at sites along the median, right sagittal, and right lateral planes. A static scanner was used in the B-mode. Three measurements significantly increase…
The first order anisotropy constants K u1 of the recently found tetragonal rare earth-iron borides R 2 Fe 14 B (P4 2 /mnm) have been measured for R=Y, Ce, Pr, Nd, Gd, Tb, Dy and Ho in a magnetic field up to 1600 kA/m from 4.2 K to about 600 K on single crystal samples.
We studied various properties of nonallophanic Andosols in Japan. Our results showed that, despite many similarities between nonallophanic and allophanic Andosols, significant dissimilarities also exist between the two groups of soils. The nonallophanic Andosols used for our study formed from rhyolitic, dacitic, or an…
Laser action at 530 nm using H3 centers in diamond was observed with an efficiency of 13.5% at room temperature. Optical double-resonance experiments on N3 centers provided direct evidence for a (2)A metastable level. Its presence results in rapid decay of the excited (2)E state and low quantum efficiency as well as s…
The first self-consistent spin-polarised band-structure calculation of the ferromagnetic compound MnBi in its low-temperature phase has been performed. The spin-orbit interaction was treated as a perturbation using scalar-relativistic wavefunctions. On the Mn atoms an effective 3d 5.5 configuration is found, with a ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituent effects on the electronic structure of metalloporphyrins: a quantitative analysis in terms of four-orbital-model parametersJ. A. Shelnutt and V. OrtizCite this: J. Phys. Chem. 1985, 89, 22, 4733–4739Publication Date (Print):October 1, 1985Publication History Publ…
This paper gives a brief survey over some recent work on surface coatings for energy efficiency and solar applications. Specifically, it covers coatings for - selective absorption of solar energy (for solar collectors), - selective emission of infrared radiation in the 8-13 μm range (for passive cooling devices), - vi…
We examine a quantum mechanical model for the enhancement of fluorescence yield and photochemical rates by the presence of small particle capable to sustain electromagnetic resonances. The sphere lowers the absorption and emission efficiency by taking energy from the molecule and storing it into nonradiative modes, en…
Pb(Zr 0.525 Ti 0.475 )O 3 piezoceramics, both unmodified and doped with 2 wt% Bi 2 O 3 or Nb 2 O 5 , were prepared by the usual techniques, using sintering temperatures from 900° to 1250°C. The microstructural data showed that the sintering temperature which produces minimum porosity is altered by the oxide additions.…
By neglecting certain terms in the Hamiltonian (of importance only in the immediate neighbourhood of the threshold energy) we are able to write an exact expression for the photoemission intensity which involves the standard time inverted LEED state and broadened hole-states. If inelastic extrinsic losses are neglected…
Isothermal demixing process of binary polymer mixtures of SBR (styrene–butadiene random copolymer) and polybutadiene at deep quench depths was investigated by time-resolved light scattering technique. The results indicated that the systems undergo extremely slow spinodal decomposition of the type as adequately charact…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetracyclo[5.1.0.01,6.02,7]octane, a [1.1.1]propellane derivative, and a new route to the parent hydrocarbonKlaus Semmler, Guenter Szeimies, and Johannes BelznerCite this: J. Am. Chem. Soc. 1985, 107, 22, 6410–6411Publication Date (Print):October 1, 1985Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic spectra of cis- and trans-azobenzenes: consequences of ortho substitutionChristine L. Forber, Eric C. Kelusky, Nigel J. Bunce, and Michael C. ZernerCite this: J. Am. Chem. Soc. 1985, 107, 21, 5884–5890Publication Date (Print):October 1, 1985Publication History Pub…
The crystal structures of ZrO 2 and HfO 2 (P2 1 /c) were refined in detail from X‐ray powder diffraction data. The precision obtained for the atom positions for both compounds is comparable to that of previous single‐crystal work.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe nature of the nonframework aluminum species formed during the dehydroxylation of H-YR. D. Shannon, K. H. Gardner, R. H. Staley, G. Bergeret, P. Gallezot, and A. AurouxCite this: J. Phys. Chem. 1985, 89, 22, 4778–4788Publication Date (Print):October 1, 1985Publication His…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray scattering from poly(thiophene): crystallinity and crystallographic structureZ. Mo, K. B. Lee, Y. B. Moon, M. Kobayashi, A. J. Heeger, and F. WudlCite this: Macromolecules 1985, 18, 10, 1972–1977Publication Date (Print):October 1, 1985Publication History Published onli…