Results 41 to 50 of about 1,045,091 (343)
Solar System chemical abundances corrected for systematics [PDF]
, 2014 The relative chemical abundances between CI meteorites and the solar photosphere exhibit a significant trend with condensation temperature. A trend with condensation temperature is also seen when the solar photospheric abundances are compared to those of nearby solar twins.
arxiv +1 more source
Non-LTE Abundances of Magnesium, Aluminum and Sulfur in OB Stars Near the Solar Circle [PDF]
Astron.Astrophys. 399 (2003) 525-530, 2002 Non-LTE abundances of magnesium, aluminum and sulfur are derived for a sample of 23 low-v \sin i stars belonging to six northern OB associations of the Galactic disk within 1 kpc of the Sun. The abundances are obtained from the fitting of synthetic line profiles to high resolution spectra.
arxiv +1 more source
Barium abundances in Cepheids [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We derived the barium atmospheric abundances for a large sample of Cepheids, comprising 270 stars. The sample covers a large range of galactocentric distances, from about 4 to 15 kpc, so that it is appropriated to investigate the existence of radial barium abundance gradients in the galactic disc.
Jacques Raymond Daniel Lépine +6 more
openaire +5 more sources
The Solar Heavy Element Abundances: I. Constraints from Stellar Interiors [PDF]
Astrophys.J.649:529-540,2006, 2005 The latest solar atmosphere models include non-LTE corrections and 3D hydrodynamic convection simulations. These models predict a significant reduction in the solar metal abundance, which leads to a serious conflict between helioseismic data and the predictions of solar interiors models.
arxiv +1 more source
Environmental DNA, 2022 Environmental DNA (eDNA) has revolutionized our ability to identify the presence and distributions of terrestrial and aquatic organisms. Recent evidence suggests the concentration of eDNA could also provide a rapid, cost‐effective indicator of abundance ...
Meaghan L. Rourke +7 more
doaj +1 more source
Spatial distribution of phytoplankton in Lasolo Bay of Southeast Sulawesi Province, Indonesia
Journal of Advanced Biotechnology and Experimental Therapeutics, 2022 This study aimed to analyze the distribution of phytoplankton abundance and its relationship with water quality in Lasolo Bay waters. The study was conducted during the West Season 2020.
Irawati, La Sara, Muliddin, Asriyana
doaj +1 more source
Constraining solar abundances using helioseismology [PDF]
Astrophys.J. 606 (2004) L85, 2004 Recent analyses of solar photospheric abundances suggest that the oxygen abundance in the solar atmosphere needs to be revised downwards. In this study we investigate the consequence of this revision on helioseismic analyses of the depth of the solar convection zone and the helium abundance in the solar envelope and find no significant effect.
arxiv +1 more source
Radial Gradients of Abundances [PDF]
, 2002 We have computed a set of multiphase chemical evolution models in which the radial mass distribution of each theoretical galaxy is calculated using the Universal Rotation Curve from Persic, Salucci & Steel (1996). We obtain the chemical evolution for galaxies of different masses and morphological types by changing the efficiencies to form molecular
Mercedes Mollá +2 more
openaire +4 more sources
Cosmological strangeness abundance
Physics Letters B, 2022 We investigate the strange particle composition of the early Universe in the hadron epoch $T_h\approx 150\ge T\ge 10$\,MeV. We study strangeness yield in thermal and chemical equilibrium constrained by prescribed entropy per baryon in a charge neutral and strangeness neutral $\langle s-\bar s\rangle$ Universe.
Cheng Tao Yang, Johann Rafelski
openaire +3 more sources
The dual nature of TDC – bridging dendritic and T cells in immunity
FEBS Letters, EarlyView.TDC are hematopoietic cells combining dendritic and T cell features. They reach secondary lymphoid organs (SLOs) and peripheral organs (liver and lungs) after FLT3‐dependent development in the bone marrow and maturation in the thymus. TDC are activated and enriched in SLOs upon viral infection, suggesting that they might play unique immune roles, since
Maria Nelli, Mirela Kuka
wiley +1 more source