Results 21 to 30 of about 204,301 (258)
Abundance and abundance change in the world's parrots [PDF]
Ibis, 2015 Estimates of population density and abundance change (differences in density or encounter rates across land uses or time periods) form the cornerstone of much of our knowledge of species' responses to environmental conditions, extinction risks and potential conservation actions. Gathering baseline data on abundance of the world's c. 10 000 bird species
Stuart J. Marsden, Kay Royle
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Planetary Nebulae: Abundances and Abundance Gradients [PDF]
, 2000 In this work, a review is given of some recent results and problems involved in the determination of chemical abundances of galactic planetary nebulae, particularly regarding disk and bulge objects.
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Chemical fingerprints of He-sdO stars
Open Astronomy, 2018 The chemical composition of helium-rich hot subluminous O stars plays an important role to understand and model their formation history. We present a spectroscopic analysis of four He-sdO stars,CD-31° 4800, [CW83] 0904- 02, LSS 1274 and LS IV +10° 9. The
Schindewolf Markus +5 more
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Physics and Astronomy Reports, 2023 We propose a line list that may be useful for the abundance analysis of G-type stars in the wavelength range 4080 – 6780 Å. It is expected that the line list will be useful for surveys/libraries with overlapping spectral regions (e.g.
Timur Şahin +3 more
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How Clumpy Star Formation Affects Globular Cluster Systems
Galaxies, 2017 There is now clear evidence the metallicities of globular clusters are not simple tracers of the elemental abundances in their protocluster clouds; some of the heavy elements were formed subsequently within the cluster itself. It is also manifestly clear
Jeremy Bailin
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The Yale ReviewCitation: 'abundance' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14415 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
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Selecting a Photometric System for Gaia: C, N, O and Alpha-Process Elements
Open Astronomy, 2003 The sensitivity of stellar spectra to C, N, O and α-process element abundances is discussed with the aim of taking this effect into account when selecting a photometric system for the Gaia orbiting observatory.
Tautvaišienė G. +2 more
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, 2021 Abstract The book examines the experience of living in a society that has more information available to the public than ever before. It focuses on the interpretations, emotions, and practices of dealing with this abundance in everyday life.
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Chemical evolution and kilonova implications of post-merger accretion disk winds
Astronomy & AstrophysicsContext. Several gamma-ray bursts (GRBs) have recently been associated with kilonova emission. We study the mechanisms that account for this effect by means of the radioactive decay of elements synthesized in accretion disk winds. Aims.
Janiuk Agnieszka +2 more
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Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source