Results 131 to 140 of about 7,461,069 (375)
The role of neutron star mergers in the chemical evolution of the Galactic halo [PDF]
, 2015 Aims. We explore the problem of the site of production of Eu. We use also the information present in the observed spread in the Eu abundances in the early Galaxy, not only its average trend.
G. Cescutti +6 more
semanticscholar +1 more source
Nucleochronology and Chemical Evolution [PDF]
The Astrophysical Journal, 1975 NSF MPS73-04673A01 ...
openaire +3 more sources
A stepwise emergence of evolution in the RNA world
FEBS Letters, EarlyView.How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley +1 more source
Planetary Nebulae as Probes of Stellar Evolution and Populations
, 1999 Planetary Nebulae (PNe) have been used satisfactory to test the effects of stellar evolution on the Galactic chemical environment. Moreover, a link exists between nebular morphology and stellar populations and evolution.
A Renzini +14 more
core +2 more sources
FEBS Letters, EarlyView.The enzyme 5‐lipoxygenase (5‐LOX) catalyzes the first step in the biosynthesis of leukotrienes (LTs) involved in inflammatory pathophysiology. After cellular stimulation, 5‐LOX translocates to the nucleus, interacting with the 5‐LOX‐activating protein (FLAP) to form LTA4 from arachidonic acid (AA).
Erik Romp +5 more
wiley +1 more source
Looking for the origin of life in cosmochemistry: Asteroids and their carbon-rich meteorites
Mètode Science Studies Journal: Annual Review, 2016 Carbonaceous chondrite meteorites are carbon-containing fragments of primitive asteroids that have offered the only samples available to date giving insights into chemical evolution in laboratory analyses.
Sandra Pizzarello
doaj +1 more source
The delayed time distribution of massive double compact star mergers
, 2016 In order to investigate the temporal evolution of binary populations in general, double compact star binaries and mergers in particular within a galactic evolution context, a most straightforward method is obviously the implementation of a detailed ...
Mennekens, N., Vanbeveren, D.
core +1 more source
The Galactic chemical evolution of oxygen inferred from 3D non-LTE spectral-line-formation calculations [PDF]
, 2015 We revisit the Galactic chemical evolution of oxygen, addressing the systematic errors inherent in classical determinations of the oxygen abundance that arise from the use of one-dimensional (1D) h ...
A. Amarsi +3 more
semanticscholar +1 more source
Brucella NyxA and NyxB dimerization enhances effector function during infection
FEBS Letters, EarlyView.Brucella abortus thrives inside cells thanks to the translocation of effector proteins that fine‐tune cellular functions. NyxA and NyxB are two effectors that destabilize the nucleolar localization of their host target, SENP3. We show that the Nyx proteins directly interact with each other and that their dimerization is essential for their function ...
Lison Cancade‐Veyre +4 more
wiley +1 more source
Galactic and Cosmic Chemical Evolution with Hypernovae
, 2005 We provide new nucleosynthesis yields depending on metallicity and energy (i.e., (normal supernovae and hypernovae), and show the evolution of heavy element abundances from C to Zn in the solar neighborhood.
Kobayashi, Chiaki
core +1 more source