Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Atomic diffusion processes in UO2 and in the fast-breeder reactor fuel, (U, Pu)O2 are reviewed. Emphasis is given to the slower-moving species. i.e. U and Pu. Self-diffusion, chemical diffusion, diffusion in a thermal gradient, enhancement of diffusion by radiation and fission and the operative diffusion mechanisms ar…
Principles and procedures of diffraction data processing are described. Reflection integration limits are obtained from a least squares analysis of peak profile widths, based on the principles of convolution synthesis of peak profiles. An approximate, empirical thermal diffuse scattering correction is obtained from a…
There is now evidence that collagen turnover in normal tissues can occur at rapid rates. In skin of adult rats, the mean rate lies between 3 and 5%/day, but rates of greater than 10%/day have been reported in some tissues, such as lung and periodontal ligament. The major sites of this degradation are still uncertain.…
The first page of this article is displayed as the abstract.
Abstract: Sequence stratigraphic concepts are powerful tools in the analysis of the evolutionary history of sedimentary basins. The criteria used in the identification of depositional sequences differ for outcrop and subsurface data sets because of scale differences in stratal continuity and spatial resolution. This p…
Graphite in various forms has become the standard target for accelerator 14 C dating. Graphite has been made by catalytic graphitization of charcoals (Lowe, 1984). Thin films of graphite have also been produced by thermal cracking (Beukens & Lee, 1981), electric discharge (Andrée et al , 1984; Wand, Gillespie &…
Article de synthese sur les recents developpements dans le domaine: les conducteurs a ion rapide, les mecanismes de la conductivite ionique, l'effet de l'ion mobile mixte et les effets de relaxation. On etudie l'influence de la structure, de la temperature et de la composition sur ces differentes proprietes
Bringing together information widely distributed throughout scientific and industrial journals, here is an overview of the chemical consititution and properties of clay minerals and the environmental conditions that lead to their formation. Provides a detailed picture of the chemical consititution of the eight main gr…
Of fundamental importance in the design of a therapeutic drug carrier system is a thorough understanding of the factors which control its fate in the living animal. The use of liposomes as a carrier system able to improve the therapeutic efficacy of a wide range of drugs, requires manipulation of its physical characte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn accurate electromagnetic theory study of surface enhancement factors for silver, gold, copper, lithium, sodium, aluminum, gallium, indium, zinc, and cadmiumEllen J. Zeman and George C. SchatzCite this: J. Phys. Chem. 1987, 91, 3, 634–643Publication Date (Print):January 1,…
The fundamental question as to whether thin intergranular films can adopt an equilibrium thickness in polycrystalline ceramics is addressed. Two continuum approaches are presented, one based on interfacial energies and the other on the force balance normal to the boundary. These indicate that there will exist a stable…
Intercalation of the layer type transition metal dichalcogenides by a variety of organic molecules, alkali metals, or ‘3d’ transition metals, provides a powerful way to finely tune the electron occupation of the relatively narrow ‘d’ bands met in these solids. These transition metal dichalcogenides are highly anisotro…
Revue de resultats experimentaux et theoriques concernant l'effondrement de bulles de cavitation pres de frontieres rigides, de surfaces libres, d'interfaces entre deux fluides de densites differentes et de materiaux composites
The various origins of a frequency-dependent conductivity in amorphous semiconductors are reviewed, stressing particularly recent advances and the influences that factors such as correlation and non-random spatial distributions of electrically active centres can have on the a.c. conductivity. A comprehensive survey is…
A numerical Kramers-Kronig analysis is used to predict the refractive-index perturbations produced in crystalline silicon by applied electric fields or by charge carriers. Results are obtained over the1.0-2.0 \mum optical wavelength range. The analysis makes use of experimental electroabsorption spectra and impurity-d…
In a comprehensive work with important implications for tuning theory and musicology, Easley Blackwood, a distinguished-composer, establishes a mathematical basis for the family of diatonic tunings generated by combinations of perfect fifths and octaves. Originally published in 1986. The Princeton Legacy Library uses…
``Electron-Electron Interactions in Disordered Systems'' deals with the interplay of disorder and the Coulomb interaction. Prominent experts give state-of-the-art reviews of the theoretical and experimental work in this field and make it clear that the interplay of the two effects is essential, especially in low-dimen…
Oscillations in an electronic gap formed by a charge-density wave are described in terms of Raman-active amplitude modes. In a multi-phonon system the authors find the Raman shifts and their intensity ratios in terms of a parameter lambda which contains all effects of electron-phonon, electron-electron and electron-di…
The physical background of the method of temperature-modulated steady-state space-charge-limited currents is described. It is based on the measurement of the current-voltage characteristics together with the current activation energy-voltage dependence in the space-charge regime, i.e. the current and its charge due to…
Light induced changes of absorption in semiconductor-doped glasses are studied on the femtosecond and picosecond time scale. Extremely rapid absorption recovery times of 200 fs are found when carriers are excited with large excess energy (500 meV) above the absorption edge of the semiconductor-doped glasses. Excitatio…