Two solid structures, a bcc orientationally disordered phase and a strained monoclinic orientationally ordered phase, may coexist for clusters of octahedral molecules. However, this coexistence is more difficult to observe in computer simulations of SF6 clusters than of TeF6 clusters although the SF6 and TeF6 molecules have the same symmetry. This study finds why this difference occurs. On the ...

In this study, dissolved Kr and SF6 gases were used to determine various hydrogeological parameters of laboratory columns under water-saturated and partially saturated conditions as a function of the flow velocity. The dissolved gases behaved conservatively in saturated columns but were significantly retarded in unsaturated conditions as a direct function of the Henry's law constant (KH) and th...

Adenosine 5'-monophosphate (AMP) and methacholine are commonly used to assess airway hyperreactivity. However, it is not fully known whether the site of airway constriction primarily involved during challenges with either agent is similar. Using a ventilation distribution test, we investigated whether the constriction induced by each agent involves the lung periphery in a similar fashion. Venti...

An insulator surface charge may be responsible for flashover along the surface. In this study, experimental investigations of post are performed using a variety voltage, gas type, and pressure conditions. Combining model transport, dominant transition is revealed considering partial discharge. The results show that hetero-polar accumulates near high voltage electrodes on at one atmospheric with...

Global distribution of mean age of stratospheric air from MIPAS SF6 measurements G. P. Stiller, T. von Clarmann, M. Höpfner, N. Glatthor, U. Grabowski, S. Kellmann, A. Kleinert, A. Linden, M. Milz, T. Reddmann, T. Steck, H. Fischer, B. Funke, M. López-Puertas, and A. Engel Forschungszentrum Karlsruhe and University of Karlsruhe, Institut für Meteorologie und Klimaforschung, Karlsruhe, Germany I...

Introduction Sulfur hexafluoride (SF 6) gas is widely used in circuit breakers and gas-insulated substations, but its use presents safety and environmental challenges when maintenance is needed. Utilities using SF 6 gas have a variety of needs, including best practices for handling SF 6 , new tools for detecting and mitigating leaks, and information on assessing gas purity. In recent years, EPR...

PURPOSE To investigate the rate of lens subluxation following plasmin and/or SF6 injections in eyes, and whether a subsequent elevated level of vascular endothelial growth factor (VEGF) and vitreous tap would aggravate subluxation. METHODS Four groups of rabbits were used. Group 1 received an intravitreal injection (IVI) of plasmin and SF6 in the right eye; group 2 received an IVI of plasmin ...

A photoionization study of CH3I in the presence of SF6 perturbers (up to the perturber density 9.75 x 10 cm) disclosed a red shift of autoionizing features that depends linearly on the perturber number density. From the perturber induced energy shifts of the CH3I nd! Rydbergs (n=9,10,11,12), the electron scattering length of SF6 was found to be A = -0.484 nm, which accords with previously repor...

Carbon nanotubes (CNTs) have aroused extensive attentions as a new category of gas sensor materials owing to their outstanding performance for detecting specific gas among a variety of ones through diverse gas responses. This review summarizes the adsorption mechanism of CNTs and their properties related to the detection of sulfur hexafluoride (SF6) decomposed gases that generated in gas insula...