Results 181 to 190 of about 5,740 (219)

Evaluating the prognostic value of microbial communities in predicting recurrence of laryngeal carcinoma: a multicenter case-control study. [PDF]

NPJ Biofilms Microbiomes
Hsueh CY, Yuan X, Huang H, Shen Y, Huang Q, Dong W, Li D, Lau HC, Mao X, Liang S, Tao L, Zhang M, Sun J, Gong H.   +13 more
europepmc   +1 more source

Cross-kingdom microbial associations characterize responsiveness to fecal microbiota transplantation in patients with irritable bowel syndrome. [PDF]

J Transl Med
Yan Q, Li M, Wang G, Zhang A, Li Y, Guo R, Zhang Y, Yang W, Zhang Y, Liu X, Li X, Zheng N, Wang L, Fan S, Ma R, Lu T, Zhou S, Guan T, Xing G, Li S, Wang L, Li Y.   +21 more
europepmc   +1 more source

Antibiotic Resistance Genes in Dust from Kindergarten Environments: A Systematic Review of Occurrence, Diversity, Determinants, and Exposure Implications. [PDF]

Int J Environ Res Public Health
Makkaew P, Bumyut A, Megasari NLA, Precha N.   +3 more
europepmc   +1 more source

The abundance distribution of stars with planets

, 2006
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The lithium abundance in stars

Space Science Reviews, 1991
The observations of Li abundances in pre-Main-Sequence, Main-Sequence (Population I and II), sub-giant, and giant stars are reviewed in order to show how Li can be used as a constraint on stellar hydrodynamics and in particular on particle transport processes in stars.
Georges Michaud, Paul Charbonneau
openaire   +1 more source

Oxygen and carbon abundances for the WO stars

Space Science Reviews, 1994
We present relative carbon and oxygen abundances derived via an optically thin recombination line analysis for five WO stars, and compare the derived abundances to recent evolutionary models. New recombination coefficients for O4+, O5+ and O6+ ions have allowed total oxygen abundances to be derived.
Robin L. Kingsburgh, M. J. Barlow, P. J. Storey   +2 more
openaire   +1 more source

Isotopic Abundances in RGB- and AGB-Stars

2006
Asymptotic Giant Branch stars contribute significantly to the chemical evolution of their host galaxies. All stars with a main-sequence mass = 8M ? will return eventually 30-80% of their mass to the interstellar medium. In parallel to the He-burning phase, which follows the original main sequence H-burning, AGB stars are known to produce heavy elements.
Käufl, Hans Ulrich, Aringer, Bernhard, Uttenthaler, Stefan, Hron, Josef   +3 more
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Oxygen Abundances in Solar-Type Stars

Astrophysics and Space Science, 1999
The absolute solar oxygen abundance, log e⨀ = 8.80 ± 0.06, has been determined from various oxygen abundance indicators in different solar atlases, and a new method is proposed to test collision rate coefficients for the NLTE model of O i. Using effective temperatures derived from Balmer lines, oxygen abundances from O i 7773 triplets in 83 solar-type ...
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Chemical Abundances in Stars

1988
The precise determination of chemical abundances in stars is the key to a number of important disciplines in modern astrophysics including stellar evolution and nucleosynthesis as well as the chemical and dynamical evolution of the Galaxy. The basic transport mechanisms in stellar atmospheres rule the observational aspects of stellar surfaces which are
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Sulphur Abundances in Metal-poor Stars

2008
We report on sulphur abundances in halo stars as derived from near-IR UVES spectra. The importance of removing telluric lines and residual CCD fringing patterns by using early B-type stars as calibrators is emphasized. Comparison of data from the weak λ8694.6 and the stronger λ9212.9, 9237.5 pair of S I lines provides important constraints on non-LTE ...
Nissen, Poul Erik; id_orcid 0000-0002-9098-2305, Akerman, C., Asplund, M., Fabbian, D., Pettini, M.   +4 more
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