Results 21 to 30 of about 500,833 (298)

Volatile‐Rich Hydrothermal Plumes Over the Southern Central Indian Ridge, 24°49’S: Evidence for a New Hydrothermal Field Hosted by Ultramafic Rocks

Geochemistry, Geophysics, Geosystems, 2022
Water column physico‐chemical studies were conducted over the southern Central Indian Ridge between 24°44’S and 25°52’S to identify and chemically characterize seafloor hydrothermal activity.
L. Surya Prakash, P. John Kurian, J. A. Resing, U. Tsunogai, A. Srinivas Rao, K. Sen, J. E. Lupton, T. Baumberger, A. Prajith, P. Roy   +9 more
doaj   +1 more source

Neonatal Applications of Heliox: A Practical Review

Frontiers in Pediatrics, 2022
Heliox is a mixture of helium and oxygen that may be utilized as an alternative to air-oxygen during the ventilatory support in the neonate. Special physical properties of Heliox, particularly low density, allow for improved gas flow and diffusion. First
Tomasz Szczapa, Patryk Kwapień, T. Allen Merritt   +2 more
doaj   +1 more source

The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XVI. The helium abundance of multiple populations [PDF]

, 2018
Recent work, based on data from the Hubble Space Telescope (HST) UV Legacy Survey of Galactic Globular Clusters (GCs), has revealed that all the analyzed clusters host two groups of first- (1G) and second-generation (2G) stars.
Anderson, J., Barbuy, B., Bedin, L. R., Bellini, A., Brown, T. M., Cassisi, S., Cordoni, G., D'Antona, F., Lagioia, E. P., Marino, A. F., Milone, A. P., Nardiello, D., Ortolani, S., Piotto, G., Renzini, A., Sarajedini, A., Tailo, M., van der Marel, R. P., Vesperini, E.   +18 more
core   +3 more sources

The Helium and Carbon Isotope Characteristics of the Andean Convergent Margin

Frontiers in Earth Science, 2022
Subduction zones represent the interface between Earth’s interior (crust and mantle) and exterior (atmosphere and oceans), where carbon and other volatile elements are actively cycled between Earth reservoirs by plate tectonics.
P. H. Barry, J. M. De Moor, J. M. De Moor, A. Chiodi, F. Aguilera, F. Aguilera, M. R. Hudak, D. V. Bekaert, S. J. Turner, J. Curtice, A. M. Seltzer, G. L. Jessen, G. L. Jessen, E. Osses, J. M. Blamey, M. J. Amenábar, M. Selci, M. Cascone, A. Bastianoni, M. Nakagawa, R. Filipovich, E. Bustos, M. O. Schrenk, J. Buongiorno, C. J. Ramírez, T. J. Rogers, K. G. Lloyd, D. Giovannelli, D. Giovannelli, D. Giovannelli, D. Giovannelli   +30 more
doaj   +1 more source

Defying Lunar Dust: A Revolutionary Helmet Design to Safeguard Astronauts’ Health in Long-Term Lunar Habitats

Aerospace
Lunar dust remains one of the most critical unresolved challenges to long-duration lunar missions. Its sharp, abrasive, and electrostatically charged particles are easily inhaled and can penetrate deep into the lungs, reaching the bloodstream and the ...
Christopher Salvino, Kenneth Altshuler, Paul Beatty, Drew DeJarnette, Jesse Ybanez, Hazel Obana, Edwin Osabel, Andrew Dummer, Eric Lutz, Moe Momayez   +9 more
doaj   +1 more source

Effect of helium as process gas on laser powder bed fusion of Ti-6Al-4V studied with operando diffraction and radiography

European Journal of Materials, 2022
The utilisation of helium as process gas in laser powder bed fusion limits the generation of Ti-6Al-4V hot and incandescent spatters and enhances their cooling rate.
Camille Pauzon, Steven Van Petegem, Eduard Hryha, Cynthia Sin Ting Chang, Samy Hocine, Helena Van Swygenhoven, Charlotte de Formanoir, Sophie Dubiez-Le Goff   +7 more
doaj   +1 more source

The Recovery of Helium [PDF]

Science, 1922
n ...
openaire   +3 more sources

Can R CrB stars form from the merger of two helium white dwarfs?

, 2012
Due to orbital decay by gravitational-wave radiation, some close-binary helium white dwarfs are expected to merge within a Hubble time. The immediate merger products are believed to be helium-rich sdO stars, essentially helium main-sequence stars.
Benz, Brown, C. Simon Jeffery, Clayton, Clayton, Cropper, Dinger, Evans, Guerrero, Han, Iben, Jeffery, Jeffery, Kilic, Kilic, Longland, Longland, Lorén-Aguilar, Nelemans, Nelemans, Paczyński, Pakmor, Pandey, Pandey, Paxton, Rebassa-Mansergas, Saio, Saio, Trimble, Warner, Webbink, Weiss, Xianfei Zhang, Yoon, Zhang   +34 more
core   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +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