Results 111 to 120 of about 292,669 (354)

Experimental Investigation on Pressure Drops of Purge Gas Helium in Packed Pebble Beds for Nuclear Fusion Blanket

Energies
The flow characteristics of purge gas helium in the pebble bed of the tritium breeding blanket are important in analyzing the tritium purging process and optimizing the design of the solid breeder blanket.
Hao Cheng, Baoping Gong, Bing Zhou, Juemin Yan, Long Wang, Long Zhang, Yongjin Feng, Xiaoyu Wang   +7 more
doaj   +1 more source

Spectroscopy and Dynamics of a Two-Dimensional Electron Gas on top of Ultrathin Helium Films on Cu(111)

, 2016
Electrons in image-potential states on the surface of bulk helium represent a unique model system of a two-dimensional electron gas. Here, we investigate their properties in the extreme case of reduced film thickness: a monolayer of helium physisorbed on
Armbrust, Nico, Feulner, Peter, Güdde, Jens, Höfer, Ulrich, Kossler, Sarah   +4 more
core   +1 more source

The Origin of Terrestrial Helium and Its Association with Other Gases [PDF]

, 1925
S. C. Lind
openalex   +1 more source

Parvalbumin Interneuron‐Dependent Hippocampal Neurogenesis Evoked by Prolonged Rhythmic Light Flicker

Advanced Science, EarlyView.
This study demonstrates that prolonged rhythmic 40 Hz light flicker enhances spatial learning by stimulating PV interneuron‐dependent neurogenesis. The light flicker selectively activates PV interneurons, which enhances GABAergic support for the integration of immature neurons in the adult dentate gyrus.
Hai Yan, Yunxuan Wang, Xufan Deng, Shiyu Wu, Yifan Pan, Jun Du, Mei Yu, Bo Liu, Huimei Wang, Zhengyu Zhang, Jinghong Chen, Shuifa Chen, Yizheng Wang, Tara Walker, Perry Bartlett, Jun Ju, Sheng‐Tao Hou   +16 more
wiley   +1 more source

Helium enrichment theory and exploration ideas for helium-rich gas reservoirs

Petroleum Exploration and Development
Using gas and rock samples from major petroliferous basins in the world, the helium content, composition, isotopic compositions and the U and Th contents in rocks are analyzed to clarify the helium enrichment mechanism and distribution pattern and the ...
Shengfei QIN, Lirong Dou, Gang TAO, Jiyuan LI, Wen QI, Xiaobin LI, Bincheng GUO, Zizhuo ZHAO, Jiamei WANG   +8 more
doaj  

Characterization of a turbomolecular-pumped magnetic sector mass spectrometer [PDF]

A Perkin Elmer MGA-1200, turbomolecular-pumped, magnetic sector, multiple gas analyzer mass spectrometer with modified inlet for fast response was characterized for the analysis of hydrogen, helium, oxygen and argon in nitrogen and helium background ...
Mehta, Narinder K.
core   +1 more source

Cryostat system for temperatures on the order of 2 deg K or less [PDF]

, 1976
A cryostat system for cooling a device to a temperature on the order of 2 K or less includes a dewar, in which helium, in other than the superfluid state, is stored.
Miller, C. G., Stephens, J. B.
core   +1 more source

Discovery of underground argon with low level of radioactive 39Ar and possible applications to WIMP dark matter detectors

, 2007
We report on the first measurement of 39Ar in argon from underground natural gas reservoirs. The gas stored in the US National Helium Reserve was found to contain a low level of 39Ar.
A Bazarko, A Burgers, A Chavarria, A G Cocco, A Goretti, A Ianni, A Ianni, A LaCava, A M Szelc, A Nelson, A Pocar, A Rappoldi, A Shirley, A Yushkov, Acosta-Kane D, B Baibussinov, B Loer, B Lyons, Brunetti R, C Galbiati, C J Ballentine, C Montanari, C Rubbia, C Schmitt, C Vignoli, C Visnjic, D Acosta-Kane, D Cheng, D Marks, D Robertson, E Calligarich, E de Haas, E Segreto, F Calaprice, F Carbonara, F Cavanna, F Dalnoki-Veress, F Di Pompeo, F Fitch, F Pietropaolo, F Resnati, Fabryka-Martin J T, G Fiorillo, G Meng, G Raselli, H H Loosli, H Y Lee, J Benziger, J Ruderman, K McCarty, L Basgall, L Grandi, L Pandola, Lehmann B E, Lehmann B E, M Antonello, M B Ceolin, M Cambiaghi, M Cassidy, M Gaull, M Laubenstein, M Leung, M Roncadelli, M Rossella, N Canci, O Amaize, O Palamara, P Benetti, P Collon, R Acciarri, R Bansal, R Highfill, R Purtschert, R Saldanha, R Scott, R Tartaglia, R Vondrasek, S Centro, S Gazzana, S Mukhopadhyay, S Ventura, T Highfill, T Hohman, T Pivonka, T Tesileanu, V Gallo   +85 more
core   +1 more source

Helium production in natural gas reservoirs

Geophysical Research Letters, 1982
About 11,000 published natural gas analyses of helium are used in the estimation of the average global scale accumulation and concentration of radiogenic helium in sediments. Simple lognormal statistics is employed to derive a net accumulation rate between 1 × 105 to 6.7 × 105 helium atoms per cubic meter of reservoir rock per second. This accumulation
J. A. S. Adams, E. B. Pereira
openaire   +2 more sources

A COMPARATIVE STUDY OF INTRAPULMONARY GAS MIXING AND FUNCTIONAL RESIDUAL CAPACITY IN PULMONARY EMPHYSEMA, USING HELIUM AND NITROGEN AS THE TEST GASES12 [PDF]

, 1958
John B. Hickam, Regina Frayser
openalex   +1 more source