Results 71 to 80 of about 8,510,179 (297)

The Formation of Very Close Binary Stars

open access: yesThe Astrophysical Journal
The majority of very close binaries (orbital periods P < 5 days) are in triples. Previous studies surmised that the tertiary hardened the inner binary via Kozai–Lidov cycles coupled with tidal friction.
Maxwell Moe
doaj   +1 more source

The Chemical Composition of Late Type Stars [PDF]

open access: yesSymposium - International Astronomical Union, 1974
A discussion is given of the chemical composition of the atmospheres of various types of late type peculiar stars and their compositions are compared with those of normal K and M stars. The groups considered include CN, CH, Ba, S, C, R CrB and HdC stars.
openaire   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS 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

High-resolution spectroscopy and spectropolarimetry of some late F- / early G-type Sun-like stars as targets for Zeeman Doppler imaging [PDF]

open access: yes, 2011
High-resolution spectroscopy and spectropolarimetry have been undertaken at the Anglo-Australian Telescope in order to identify suitable targets for magnetic studies of young Sun-like stars, for the proxy study of early solar evolution.
S. C. Marsden   +25 more
core   +1 more source

Optimising the global detection of solar-like oscillations

open access: yesAstronomy & Astrophysics
Context. A well-established method exists for predicting the detectability of solar-like oscillations that has seen extensive application supporting target selection strategies for space-based photometric missions.
Lund Mikkel N., Chaplin William J.
doaj   +1 more source

Diversity and complexity in neural organoids

open access: yesFEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

open access: yesFEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure   +3 more
wiley   +1 more source

Astronomy And Astrophysics

open access: yes, 1999
.<F3.608e+05> Hipparcos trigonometric parallaxes have been used to derive a photometric absolute magnitude calibration of mainsequence late A-type stars in terms of Str omgren photometric indices -- accounting for temperature, evolution and ...
Late Type Stars, F. Figueras, A. Domingo
core  

The human gut microbiome across the life course

open access: yesFEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero   +4 more
wiley   +1 more source

Equilibria and oscillations of magnetised neutron stars

open access: yes, 2010
We investigate equilibrium configurations and oscillation spectra of neutron stars,modelled as rotating magnetised fluid bodies in Newtonian gravity. We also explorethe idea that these model neutron stars could have dynamics analogous to rigid-bodyfree ...
Lander, Samuel Kenneth
core   +1 more source

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