Results 51 to 60 of about 19,893 (198)

Using CFCs and SF6 for groundwater dating : a SWOT analysis [PDF]

, 2010
A knowledge of the residence time of groundwater is of importance in understanding key issues in the evolution of water quality. Chlorofluorocarbons (CFCs) and sulphur hexafluoride (SF6) offer a convenient way of dating waters up to ~60 yrs old.
Darling, W.G., Gooddy, D.C., MacDonald, A.M., Morris, B.L.   +3 more
core  

Multiparametric Ultrasound Findings of Testicular Sarcoidosis

Journal of Ultrasound in Medicine, EarlyView.
Objectives To characterize the multiparametric ultrasound (MPUS) features of testicular sarcoidosis, incorporating greyscale, color Doppler ultrasound (CDUS), contrast‐enhanced ultrasound (CEUS), and strain elastography (SE), and to assess their collective diagnostic value.
Huahui Liu, Razan Abudalo, Ghali Salahia, Gibran T. Yusuf, Dean Y. Huang, Paul S. Sidhu   +5 more
wiley   +1 more source

Ion Activation Methods for Top‐Down Proteomics

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Mass spectrometry (MS) has emerged as a premier method used to characterize the sequences of proteins. Top‐down proteomics aims to capture the multiple sources of structural diversity reflected in proteins, such as those that arise from alternative RNA splicing events or the addition of post‐translational modifications. Tandem MS (i.e., MS/MS)
Jada N. Walker, Jennifer S. Brodbelt
wiley   +1 more source

Large-eddy simulation and multiscale modelling of a Richtmyer–Meshkov instability with reshock [PDF]

, 2006
Large-eddy simulations of the Richtmyer–Meshkov instability with reshock are pre- sented and the results are compared with experiments. Several configurations of shocks initially travelling from light (air) to heavy (sulfur hexafluoride, SF6) have been ...
Hill, D. J., Pantano, C., Pullin, D. I.
core   +2 more sources

Microbubble‐Based Ultrasound Contrast Agents in Contrast‐Enhanced Ultrasonography for Managing Portal Hypertension in Cirrhosis

Portal Hypertension &Cirrhosis, EarlyView.
As the hepatic venous pressure gradient (HVPG) remains the current gold standard for diagnosing portal hypertension in cirrhosis, its clinical application is limited by invasiveness, high cost, and restricted availability. Given the urgent need for noninvasive techniques to dynamically monitor portal vein pressure (PVP), contrast‐enhanced ...
Danping Huang, Zefeng Liu, Lingling Liu, Fen Huang, Wenjuan Wang, Guo Zhang   +5 more
wiley   +1 more source

Breakdown Voltage Using Bond Energy Calculation for CF3CHCl2/CO2 Mixture as Insulation Applied

JAREE (Journal on Advanced Research in Electrical Engineering), 2019
— Sulfur hexafluoride gas according to the Montreal Protocol and Kyoto protocol needs to be limited and gradually reduced because it causes global warming, the greenhouse effect and acid rain on the environment.
Tedy Juliandhy
doaj  

Investigation of Synthesis and Dielectric Properties of c-C₄F₈O With Its CO₂/N₂ Mixtures as SF₆ Alternatives in Gas-Insulated Applications

IEEE Access, 2020
The usage and emission of SF6 has been regulated because of high Global Warming Potential (GWP) and long atmospheric lifetime as an insulator in high voltage power transmission equipment.
Zhanyang Gao, Yi Wang, Shiyao Wang, Ruichao Peng, Wenjun Zhou, Ping Yu, Yunbai Luo   +6 more
doaj   +1 more source

Accelerator Testing of the General Antiparticle Spectrometer, a Novel Approach to Indirect Dark Matter Detection [PDF]

, 2005
We report on recent accelerator testing of a prototype general antiparticle spectrometer (GAPS). GAPS is a novel approach for indirect dark matter searches that exploits the antideuterons produced in neutralino-neutralino annihilations.
Baret B, C J Hailey, Coutu S, Donato F, Edsjo J, Ellis J Olive K A Santoso Y Spanos V, F Gahbauer, Fuke H, Galaktionov Y V, H T Yu, Halzen F, J E Koglin, K Mori, K P Ziock, L Fabris, Lionetto A M Morselli A Zdravkovic V, N Madden, Picozza P, Profumo S, Rohrer U, T Aramaki, W W Craig, Ziock K P   +22 more
core   +1 more source

Comparison of Dielectric Recovery After Arc Burning in SF6 Gas and Its Potential Alternatives

High Voltage, EarlyView.
ABSTRACT Although sulphur hexafluoride (SF6) exhibits exceptional insulating properties, it is a potent greenhouse gas. Therefore, studying alternatives to SF6 is critical for developing environmentally friendly high‐voltage electrical equipment.
Ziqi Liu, Hao Sun, Yi Wu, Mingzhe Rong, Zeyuan Luo   +4 more
wiley   +1 more source

Can hail and rain nucleate cloud droplets?

, 2017
We present results from moist convection in a mixture of pressurized sulfur hexa-flouride (liquid and vapor) and helium (gas) to model the wet and dry components of the earth's atmosphere.
Bodenschatz, Eberhard, Krekhov, Alexei, Prabhakaran, Prasanth, Pumir, Alain, Weiss, Stephan   +4 more
core   +1 more source