Results 121 to 130 of about 4,355,728 (290)

Simulations of Interacting Binary Systems—Pathways to Radio-bright Gamma-Ray Burst Progenitors

The Astrophysical Journal
Although the association of gamma-ray bursts (GRBs) with massive stellar death is on firm footing, the nature of the progenitor system and the key ingredients required for a massive star to produce a GRB remain open questions.
Angel Hernandez, Roseanne M. Cheng, Nicole M. Lloyd-Ronning, C. E. Fields   +3 more
doaj   +1 more source

The Influence of Neutrino Processes on Late Stages of Stellar Evolution.

The Astrophysical Journal, 1963
It is assumed that neutrino processes from a direct coupling between electrons and neutrinos do occur in reality. Using a crude model, it is shown that these processes have a marked effect on the characteristics of the late stages of stability of stellar evolution.
openaire   +1 more source

RNA‐related functions of BRCA2 in transcription, replication, and genome stability

FEBS Letters, EarlyView.
Beyond its role in homologous recombination, BRCA2 regulates R‐loop homeostasis, DNA–RNA hybrid resolution, RNA polymerase II dynamics, and transcriptional activation. Disruption of any of these functions can contribute to genome instability, inflammatory signaling, and tumorigenesis. BRCA2 is a central tumor suppressor protein best known for its roles
Lucia Alvaro‐Aranda, Sreerama Chaitanya Sridhara, Aura Carreira   +2 more
wiley   +1 more source

Atomic diffusion and stellar evolution

, 2013
Stellar models including atomic diffusion processes (gravitational settling, radiative accelerations, thermal diffusion, in addition to the purely diffusive term) have now been evolved throughout most of stellar evolution.
G. Michaud, J. Richer
core   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Planet Formation Regulated by Galactic-scale Interstellar Turbulence

The Astrophysical Journal Letters
Planet formation occurs over a few Myr within protoplanetary disks of dust and gas, which are often assumed to evolve in isolation. However, extended gaseous structures have been uncovered around many protoplanetary disks, suggestive of late-stage infall
Andrew J. Winter, Myriam Benisty, Sean M. Andrews   +2 more
doaj   +1 more source

Modeling of Silicon Burning during late stages of Stellar Evolution [PDF]

, 2019
Recent studies with parametrized initial conditions have shown that perturbations in the flow pattern of the progenitor might be a crucial ingredient to enable more robust explosions in three-dimensional (3D) simulations of core-collapse supernovae. Those perturbations naturally develop during the hydrostatic silicon and oxygen burning phases in a star.
openaire   +1 more source

The heterodimeric amino acid transporters (HAT) of the SLC7/SLC3 family: A structure−function relationships and relevance to human pathology

FEBS Letters, EarlyView.
Heterodimeric amino acid transporters consist of SLC7 and SLC3 family proteins arranged in a conserved structural organization. They regulate nutrient transport across cell membranes, supporting essential cellular functions. These transporters also contribute to xenobiotic/drug uptake and distribution.
Mariafrancesca Scalise, Tiziano Mazza, Raffaella Scanga, Lara Console, Michele Galluccio, Cesare Indiveri   +5 more
wiley   +1 more source

Dartmouth stellar evolution models

, 2017
<p>Dartmouth stellar evolution models 2012 version.</p> <p>HST_ACSWF.tgz<br> HST_WFPC2.tgz<br> PanSTARRS.tgz<br> SDSSugriz.tgz<br> UBVRIJHKsKp.tgz</p ...
Eduardo Balbinot, Eduardo Balbinot (5582627)   +1 more
core   +1 more source

A context‐dependent modulatory role for eIF6 in acquired resistance to vemurafenib in melanoma

FEBS Letters, EarlyView.
Acquired resistance to vemurafenib upregulates the translation factor eIF6 in melanoma cells. Silencing eIF6 in resistant cells reduces proliferation and partially restores drug sensitivity, whereas its overexpression increases sensitivity across melanoma lines regardless of BRAF status, via modulation of mTOR, S6K, and MAPK signaling.
George Kyriakopoulos, Antonia Petropoulou, Alexandra Anastogianni, Angelina Bania, Vassilis Stamatakis, Argyris Alexiou, Chi‐Ping Day, Glenn Merlino, Katerina Grafanaki, Constantinos Stathopoulos   +9 more
wiley   +1 more source