Results 31 to 40 of about 3,517,480 (298)

Recent advances in microbial capture of hydrogen sulfide from sour gas via sulfur‐oxidizing bacteria

open access: yesEngineering in Life Sciences, 2021
Biological desulfurization offers several remarkably environmental advantages of operation at ambient temperature and atmospheric pressure, no demand of toxic chemicals as well as the formation of biologically re‐usable sulfur (S0), which has attracted ...
Zheng Chen   +8 more
doaj   +1 more source

Effect of Interface Microstructure on Joint Strength of Zirconia/Titanium Alloy Brazed with Amorphous Zr-Ti-Ni-Cu Active Filler Metal

open access: yesMetals, 2020
Active brazing of zirconia with metallic alloys is a promising method for enhancing the mechanical property of zirconia. However, the brazing process of zirconia and metallic alloys has not been studied in detail because of a limitation in selection of ...
Sung Woo Park   +9 more
doaj   +1 more source

The production of actinides in neutron star mergers

open access: yesAAPPS Bulletin, 2022
Although the multimessenger detection of the neutron star merger event GW170817 confirmed that mergers are promising sites producing the majority of nature’s heavy elements via the rapid neutron-capture process (r-process), a number of issues related to ...
Meng-Ru Wu, Projjwal Banerjee
doaj   +1 more source

Sensitivity of the r-process to nuclear masses [PDF]

open access: yes, 2012
The rapid neutron capture process (r-process) is thought to be responsible for the creation of more than half of all elements beyond iron. The scientific challenges to understanding the origin of the heavy elements beyond iron lie in both the ...
Aprahamian, A.   +4 more
core   +2 more sources

Feasibility Study on the Fabricating of Carbon-Nanotube-Reinforced Al-Si-Cu Alloy Matrix Composites Using Oxygen-Replacing Die Casting Process

open access: yesMetals, 2023
A383 Al-Si-Cu alloy matrix composites were reinforced with different amounts (0.5, 1.0, 1.5 and 2.0 wt%) of chopped multiwalled carbon nanotubes (MWCNTs) and fabricated using the oxygen-replacing die casting (ORDC) process to reduce gas porosities via ...
Seong-Hyo Oh   +6 more
doaj   +1 more source

r-Process Nucleosynthesis from Compact Binary Mergers [PDF]

open access: yes, 2021
The merger of two neutron stars or of a neutron star and a black hole often result in the ejection of a few percents of a solar mass of matter expanding at high speed in space. Being matter coming from the violent disruption of a neutron star, these ejecta are initially very dense, hot and extremely rich in neutrons.
Perego, A.   +2 more
openaire   +4 more sources

Purification and characterization of the receptor‐binding domain of SARS‐CoV‐2 spike protein from Escherichia coli

open access: yesEngineering in Life Sciences, 2021
SARS‐CoV‐2 is responsible for a disruptive worldwide viral pandemic, and renders a severe respiratory disease known as COVID‐19. Spike protein of SARS‐CoV‐2 mediates viral entry into host cells by binding ACE2 through the receptor‐binding domain (RBD ...
Yunxia He   +5 more
doaj   +1 more source

A new r-process star with low abundances of r-process elements

open access: yesJournal of Physics: Conference Series, 2016
Metal-poor stars with measurable r-process element abundances provide key clues to the production site(s) of the r-process and how its products are mixed with the surrounding medium. While the number of stars exhibiting strong enhancements of r-process elements has grown over the years, the lower "floor" of r-process enrichment in metal-poor stars has ...
Frebel, Anna L.   +2 more
openaire   +2 more sources

The End Of Nucleosynthesis: Production Of Lead And Thorium In The Early Galaxy [PDF]

open access: yes, 2009
We examine the Pb and Th abundances in 27 metal-poor stars (-3.1 56) enrichment was produced only by the rapid (r-) nucleosynthesis process. New abundances are derived from Hubble Space Telescope/Space Telescope Imaging Spectrograph, Keck/High ...
Christlieb, Norbert   +6 more
core   +2 more sources

Effects of Mg Content on Hydrogen Content and Melt Quality of Al-Mg Alloys

open access: yesMetals, 2019
In Al-Mg alloys with Mg content 0 ≤ XMg ≤ 6 wt. %, the effects of XMg on dissolved hydrogen content ([H]) and melt quality were investigated.
Ho Sung Jang   +7 more
doaj   +1 more source

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