Results 71 to 80 of about 1,003,844 (306)

Solar Chemical Abundances Determined with a CO5BOLD 3D Model Atmosphere [PDF]

, 2010
In the last decade, the photospheric solar metallicity as determined from spectroscopy experienced a remarkable downward revision. Part of this effect can be attributed to an improvement of atomic data and the inclusion of NLTE computations, but also the
E. Caffau, H. Ludwig, M. Steffen, B. Freytag, P. Bonifacio   +4 more
semanticscholar   +1 more source

Microbiome−host proteostasis crosstalk—An emerging perspective on mechanisms and interventions toward healthy longevity

FEBS Letters, EarlyView.
Proteostasis and the gut microbiota play a key role in shaping host physiology. Microbiota‐derived metabolites, vitamins, and RNA modulate host proteostasis. Findings from model systems, including C. elegans, indicate microbes can either stabilize or disrupt host proteostasis.
Abhishek Anil Dubey, Maria Ermolaeva
wiley   +1 more source

Chemical evolution and kilonova implications of post-merger accretion disk winds

Astronomy & Astrophysics
Context. 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, Saji Joseph, Urrutia Gerardo   +2 more
doaj   +1 more source

Stellar Populations of the Galactic Disk: Metallicity Distribution and Kinematics

Open Astronomy, 2003
Metallicities and distances have been determined from Vilnius photometry for an in situ sample of nearly 650 stars in eight proper-motion fields at high Galactic latitudes.
Bartašiūtė S., Aslan Z., Boyle R. P., Kharchenko N. V., Ossipkov L. P., Sperauskas J.   +5 more
doaj   +1 more source

Direct D-atom Incorporation in Radicals: An Overlooked Pathway for Deuterium Fractionation

The Astrophysical Journal, 2023
Direct D-H exchange in radicals is investigated in a quasi-uniform flow employing chirped-pulse millimeter-wave spectroscopy. Inspired by the H-atom catalyzed isomerization of C _3 H _2 reported in our previous study, D-atom reactions with the propargyl (
Nureshan Dias, Ranil M. Gurusinghe, Bernadette M. Broderick, Tom J Millar, Arthur G. Suits   +4 more
doaj   +1 more source

Gaia FGK benchmark stars: abundances of α and iron-peak elements [PDF]

, 2015
Context. In the current era of large spectroscopic surveys of the Milky Way, reference stars for calibrating astrophysical parameters and chemical abundances are of paramount importance. Aims.
P. Jofré, U. Heiter, C. Soubiran, Sergi Blanco-Cuaresma, Sergi Blanco-Cuaresma, T. Masseron, T. Nordlander, L. Chemin, C. Worley, S. V. Eck, A. Hourihane, G. Gilmore, V. Adibekyan, M. Bergemann, M. Bergemann, T. Cantat-Gaudin, E. Delgado-Mena, J. I. G. Hernández, J. Hernández, G. Guiglion, C. Lardo, P. Laverny, K. Lind, L. Magrini, Š. Mikolaitis, Š. Mikolaitis, D. Montes, E. Pancino, E. Pancino, A. Recio-Blanco, R. Sordo, S. Sousa, H. Tabernero, A. Vallenari   +33 more
semanticscholar   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

The Ba Isotopic Ratio as a Way of Distinguishing the R- and S-Process in Chemical Evolution Models

Galaxies
Only recently, observational studies have started providing measurements for the barium isotopic ratio in metal-poor stars with unprecedented detail. This new approach can be extremely useful in tracing back the origin of neutron-capture elements, since ...
Federico Rizzuti, Gabriele Cescutti, Linda Lombardo, Lorenzo Roberti, Tatyana Sitnova   +4 more
doaj   +1 more source

Phosphoinositides and inositol phosphates as molecular glues

FEBS Letters, EarlyView.
Inositol phosphates (IPs) and phosphoinositides (PIPs) regulate diverse eukaryotic processes. Beyond recruiting signaling proteins or acting as structural cofactors, recent studies suggest they mediate protein–protein interactions as natural molecular glues.
Aleshia Seaton‐Terry, Alexander J. Cutright, Mong Na Claire Loi, Jessica Martin, Joseph W. Gilligan, Jakub N. Kubina, Michael J. Arambula, Susanna Tanada Palmu, Daniella Zhou, Raymond D. Blind   +9 more
wiley   +1 more source

Observational signatures and constraints on the intermediate neutron-capture process

Astronomy & Astrophysics
Context. Observational abundances of carbon enhanced metal-Poor (CEMP) stars with patterns in between those produced by the rapid (r) and slow (s) nucleosynthesis processes (CEMP-rs stars) are currently invoked as evidence of synthesis via the ...
Giribaldi R. E., Vescovi D., Magrini L., Cristallo S., D’Orazi V., Piersanti L., Cornejo Espinoza D., Randich S., Baratella M.   +8 more
doaj   +1 more source