Results 121 to 130 of about 876,778 (355)

Selecting a Photometric System for Gaia: C, N, O and Alpha-Process Elements

Open Astronomy, 2003
The sensitivity of stellar spectra to C, N, O and α-process element abundances is discussed with the aim of taking this effect into account when selecting a photometric system for the Gaia orbiting observatory.
Tautvaišienė G., Edvardsson B., Bartašiūtė S.   +2 more
doaj   +1 more source

Exploring lipid diversity and minimalism to define membrane requirements for synthetic cells

FEBS Letters, EarlyView.
Designing the lipid membrane of synthetic cells is a complex task, in which its various roles (among them solute transport, membrane protein support, and self‐replication) should all be integrated. In this review, we report the latest top‐down and bottom‐up advances and discuss compatibility and complexity issues of current engineering approaches ...
Sergiy Gan, Victoria Scarpelli, Marten Exterkate   +2 more
wiley   +1 more source

A COMPARISON OF STELLAR ELEMENTAL ABUNDANCE TECHNIQUES AND MEASUREMENTS [PDF]

The Astrophysical Journal Supplement Series, 2016
ABSTRACT Stellar elemental abundances are important for understanding the fundamental properties of a star or stellar group, such as age and evolutionary history, as well as the composition of an orbiting planet. However, as abundance measurement techniques have progressed, there has been little standardization between individual methods
Sergi Blanco-Cuaresma, Michael D. Pagano, Vardan Adibekyan, Ulrike Heiter, Pieter Gruyters, Pieter Gruyters, Joleen K. Carlberg, Joleen K. Carlberg, S. G. Sousa, Patrick A. Young, Thomas Nordlander, Natalie R. Hinkel, Ariel D. Anbar, Steven J. Desch, Nuno C. Santos, Elisa Delgado Mena, Paula Jofre, F. Liu, Andreas J. Korn, Caroline Soubiran   +19 more
openaire   +6 more sources

Ergothioneine supplementation improves pup phenotype and survival in a murine model of spinal muscular atrophy

FEBS Letters, EarlyView.
Spinal muscular atrophy (SMA) is a genetic disease affecting motor neurons. Individuals with SMA experience mitochondrial dysfunction and oxidative stress. The aim of the study was to investigate the effect of an antioxidant and neuroprotective substance, ergothioneine (ERGO), on an SMNΔ7 mouse model of SMA.
Francesca Cadile, Daniela Ratto, Giorgia Rastelli, Ottavia Eleonora Ferraro, Caterina Temporini, Sunil Kumar, Simona Boncompagni, Paola Rossi, Monica Canepari   +8 more
wiley   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

Ruthenium and hafnium abundances in giant and dwarf barium stars

, 2007
We present abundances for Ru and Hf, compare them to abundances of other heavy elements, and discuss the problems found in determining Ru and Hf abundances with laboratory gf-values in the spectra of barium stars.
Allen, Allen, Arlandini, Barbuy, Boyarchuk, Böhm-Vitense, Böhm-Vitense, Cayrel, D. M. Allen, Edvardsson, G. F. Porto de Mello, Gallino, Grevesse, Gustafsson, Hill, Honda, Jorissen, Kaufer, Lawler, Luck, Lundqvist, Masseron, Meléndez, North, Piskunov, Plez, Smiljanic, Smith, Sneden, Spite, Tomkin, Yushchenko   +31 more
core   +1 more source

Primordial Lithium from Globular Cluster Turnoff Stars: M13 and M71

The Astrophysical Journal
During Big Bang nucleosynthesis (BBN) in the first 15 minutes of the Universe, some ^7 Li was created along with isotopes of H and He. The determination of that primordial value of Li can help constrain the conditions at that time.
Ann Merchant Boesgaard, Constantine P. Deliyannis   +1 more
doaj   +1 more source

MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS [PDF]

, 2013
We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESAstar.
B. Paxton, M. Cantiello, P. Arras, L. Bildsten, E. Brown, A. Dotter, C. Mankovich, M. Montgomery, D. Stello, F. Timmes, R. Townsend   +10 more
semanticscholar   +1 more source

A working model for cytoplasmic assembly of H/ACA snoRNPs

FEBS Letters, EarlyView.
Dyskerin is the component of nuclear H/ACA ribonucleoproteins (RNPs) endowed with pseudouridine synthase catalytic activity. Two isoforms of human dyskerin have been characterized: the abundant Iso1, mainly nuclear, and the shorter Iso3, mainly cytoplasmic but occasionally imported into nuclei.
Alberto Angrisani, Maria Furia
wiley   +1 more source

The far-ultraviolet spectra of two hot PG1159 stars

, 2016
PG1159 stars are hot, hydrogen-deficient (pre-) white dwarfs with atmospheres mainly composed of helium, carbon, and oxygen. The unusual surface chemistry is the result of a late helium-shell flash.
Kruk, J. W., Rauch, T., Werner, K.
core   +1 more source