We have studied macroparticle generation from a tungsten carbide (WC) cathode used in a dc vacuum arc discharge. Despite a relatively high decomposition/melting point (~ 3100 K), there is an intensive generation of visible particles with sizes in the range 20-35 μm. Visual observations during the discharge and scanning electron microscopy of the cathode surface as well as of collected macropart...

In the present work, the sublimation of crystalline solid 2-(2-nitrovinyl) furan (G-0) in the temperature range of 35 to 60 °C (below the melting point of the drug) was studied using thermogravimetric analysis (TGA). The sublimated product was characterized using Fourier-transformed-infrared spectroscopy (FT-IR) and thin layer chromatography (TLC). The sublimation rate at each temperature was o...

in this paper, the effect of size on melting temperature of metallic nanoparticles (au, pb and bi) is theoretically simulated and explained. in this regard, the cause of difference in various experimental data is introduced, which is the difference between nanoparticles’ grain gaussian distribution. this volume-depended model with the help of the gaussian distribution can describe the relation ...

The fabrication of Yb 3+ , Tm co-doped oxyfluorophosphate glass-based composites, with green persistent luminescence after being charged near-infrared light, is demonstrated. mechanism responsible for the afterglow illumination unveiled. composite prepared using a modified melting process to limit evaporation fluorine during melting. Intense (blue and ultraviolet) up-conversion emission obtaine...

Recent molecular dynamics simulation results have increased conceptual understanding of the grazing and the ploughing friction at elevated temperatures, particularly near the substrate's melting point. In this commentary we address a major constraint concerning its experimental verification.

C. WYLENZEK*, J. TRÜBENBACH†, P. GOHL†, G. WILDHARDT†, S. ALKINS‡, M. B. FAUSETT‡, J. DECKER§, D. STEINBERGER†,¶ *Hunsrueck Klinik, Simmern, Germany Bioscientia Center for Human Genetics, Ingelheim, Germany Landstuhl Regional Medical Center, Landstuhl, Germany §Department of Hematology and Oncology, Johannes Gutenberg-University, Mainz, Germany –Institute for Human Genetics, Justus-Liebig Unive...

We show that there exists an Efimov-like three strand DNA bound state at the duplex melting point and it is described by a renormalization group limit cycle. A nonperturbative renormalization group is used to obtain this result in a model involving short range pairing only. Our results suggest that Efimov physics can be tested in polymeric systems.

An analytical solution shows that a competition between bond order loss and the associated bond strength gain of the lower coordinated atoms near the edge of a surface dictates the mechanics of the surface and, hence, a nanosolid. Bond order loss lowers the activation energy for atomic dislocation, whereas bond strength gain enhances the energy density or mechanical strength in the region near ...

Quasielastic neutron scattering experiments and molecular dynamics ~MD! simulations have been used to investigate molecular diffusive motion near the melting transition of monolayers of flexible rod-shaped molecules. The experiments were conducted on butane and hexane monolayers adsorbed on an exfoliated graphite substrate. For butane, quasielastic scattering broader than the experimental energ...

Melting fine structure of the nuclear DNA isolated from the filamentous fungus Fusarium graminearum Schwabe is presented. Optical melting profiles of nuclear DNA were analyzed by using a combination of curve fitting and derivative techniques. The "melting components" were obtained from the derivative curve by a simple decomposition technique. Differential optical melting curves of unsheared nuc...