We study elementary processes for production of dileptons from nucleons, either through NN bremsstrahlung or through photon-induced reactions. We emphasize the dependence of the expected cross-sections on the electromagnetic formfactor of the nucleon in the time-like regime and point out that the mentioned reactions can provide important information on the validity of vector meson dominance for...

Resonance Raman spectra and absolute cross sections of InP/ZnSe/ZnS core/shell/shell nanocrystals have been obtained at excitation wavelengths 501.7, 457.9, 410 nm. Eight different structures having nearly the same lowest excitonic absorption wavelength but significantly stoichiometries are compared. The show phonon features attributable to both InP core ZnSe shell. largest differences among se...

Abstract Casting powders or mold fluxes, as they are more commonly known, used in the continuous casting of steel to prevent shell from sticking copper mold. The first melt and create a pool liquid flux above mold, then fluxes penetrate into gap between water-cooled shell, where crystallization solid phases takes place temperatures gradually drop. It is important understand behavior these becau...

Transmission electron energy loss spectra were obtained from small (approximately loo-A diam) regions of a series of single-phase silicon-containing specimens at loo-keV incident beam energy, using a field emission source transmission electron microscope fitted with a magnetic sector spectrometer. The specimen foils were diamond cubic silicon, a-silicon carbide, a-silicon nitride, and amorphous...

We performed an overview of the inner shell excitation phenomena in the study of electron recombination with multiply charged complex ions such as Au (q=49-52) and Pb. It is found the the inner shell excitations play a significant role in the low energy electron recombination. Taking into account these inner shell excitations we have calculated the energy avaraged capture cross sections. The di...

Metal-semiconductor hybrid heteronanostructures may exhibit synergistically reinforced optical responses and significantly enhanced optical tunability that essentially arise from the unique nanoscale interactions between the metal and semiconductor components. Elaboration of multi-component hybrid nanoparticles allows us to achieve optimized or diversified material functionalities through preci...

The distribution of cells that stained positively with paraldehyde fuchsin (PAF) and negatively with chrome-hematoxylin phloxine (CH) in the subesophageal ganglionic mass of Achatina fulica has been mapped. The PAF-positive cells occur in the visceral ganglion, each cell contains electron-dense elementary granules of 1,300 Angstrom in diameter. From serial section, it showed that the PAF-positi...

De-embedded ultrathin sections of ethanol-fixed Tipula Iridescent Virus particles were incubated with pepsin at pH 1.8, trypsin at pH 7.7, and DNase at pH 7.7. The outer shell of the particles, but not an inner core, was removed by the action of pepsin. Conversely, the inner core, but not the outer shell, was removed by the action of trypsin and DNase in combination, but not by either enzyme ac...

Aerosol optics models are an integral part of climate and retrieval methods for global remote sensing observations. Such large-scale environmental applications place tight constraints on the affordable model complexity, which difficult to reconcile with considerable level detail that is needed capture sensitivity optical properties morphological aerosol characteristics. Here, we develop a novel...

Based on the wave propagation method and improved Fourier series, coupled vibration model of double-sided immersion (DI) cylindrical shell under arbitrary boundary conditions is established, its characteristics are solved. The coupling characteristic experiment a DI condition carried out for first time. calculated natural frequency acceleration compared with experimental results, which not only...