The infrared spectroscopy of SF6 relevant to laser experiments is discussed. A computed contour of the v3 band is presented which reproduces the prominent Q branch structure. Experiments measuring the saturation of absorption by the v3 transition in SF6 by a CW CO, laser and Q-switched pulse transmission in the same medium are described. The results of these experiments are interpreted with the...

Purpose The purpose of this study was to study the incidence and factors influencing retinal displacement in eyes treated for rhegmatogenous retinal detachment (RRD) with pars plana vitrectomy (PPV) and gas or silicone oil. Methods This was a prospective observational case series. One hundred twenty-five eyes with macula-off RRD from 125 patients underwent 25-gauge PPV at two vitreoretinal in...

This study was conducted to compare the methane (CH4) production estimated by in vivo (sulfur hexafluoride tracer technique (SF6)) with that of two in vitro rumen simulation (RUSITEC) and gas production (IVGPT)) techniques. Four adult dry Holstein cows, aged 7.4±3.0 years and weighing 697±70 kg, were used for measuring methane production from five diets by the SF6 technique. The experimental di...

Sulfur hexafluoride (SF6) is a widely used insulator in the industry, but it also has high global warming potential. Studying electron impact ionization of SF6, particularly measuring energy and angular distributions collision products, can provide valuable information about underlying physics process nature SF6 molecule. In this study, double differential cross sections (DDCSs) for have measur...

Physical processes such as advection, dispersion, and air-water gas exchange play important roles in determining the movement and change in concentration of contaminants discharged into rivers. In the following, we report results from a large-scale SF6 tracer release experiment conducted in the tidal Hudson Riverto examine longitudinal dispersion and net advection. SF6 was injected into the Hud...

[1] Two He/SF6 dual‐gas tracer injections were conducted during the Southern Ocean Gas Exchange Experiment (SO GasEx) to determine gas transfer velocities. During the experiment, wind speeds of up to 16.4 m s were encountered. A total of 360 He and 598 SF6 samples were collected at 40 conductivity‐temperature‐depth (CTD) rosette casts and two pumped stations. The gas transfer velocity k was cal...

SF6 total columns are successfully retrieved from FTIR measurements (Saint Denis and Maïdo) at Réunion Island (21◦S, 55◦E) between 2004-2016 using the SFIT4 algorithm: the retrieval strategy and the error budget are presented. The FTIR SF6 retrieval has independent information in only one individual layer, covering the whole troposphere and the lower stratosphere. The trend of SF6 is analysed b...

In plant chamber studies, if CO2 leaking from a chamber is not quantified, it can lead to an overestimate of assimilation rates and an underestimate of respiration rates; consequently, it is critical that CO2 leakage be determined. Sulfur hexafluoride (SF6) was introduced into the chambers as a tracer gas to estimate leakage rates. Chamber leakage constants were determined by measuring the rate...

Kenji Tsuchiya Koichi Nagano Ayumu Morita Tetsuya Hirao OVERVIEW: To make medium-voltage switchgear (52 kV or less) smaller and more robust, there has been a shift away from AISs and toward GISs that use SF6 gas . However, the high global warming coefficient of SF6 gas means it was designated as a greenhouse gas by the Kyoto Protocol (Kyoto Protocol to the United Nations Framework Convention on...

BACKGROUND To evaluate intravitreal injection of expansile sulfur hexafluoride (SF6) as a low cost and effective treatment for symptomatic vitreomacular adhesion (sVMA). METHODS Retrospective analysis of all patients with sVMA treated with pneumatic vitreolysis using SF6 gas presenting to a clinical practice from January 2005 and June 2013. RESULTS Six cases were included in the study. Five...