Results 121 to 130 of about 1,234,720 (380)
Chemical Abundances in AGN Environment: X-Ray/UV Campaign on the MRK 279 Outflow [PDF]
, 2006 We present the first reliable determination of chemical abundances in an AGN outflow. The abundances are extracted from the deep and simultaneous FUSE and HST/STIS observations of Mrk 279.
Ari Laor +15 more
core +3 more sources
Carbon and oxygen abundances in stellar populations [PDF]
, 2014 Abundances of C, O, and Fe are determined for F and G main-sequence stars in the solar neighborhood in order to study trends and systematic differences in the C/Fe, O/Fe, and C/O ratios for stellar populations.
P. Nissen +5 more
semanticscholar +1 more source
Autophagy in cancer and protein conformational disorders
FEBS Letters, EarlyView.Autophagy plays a crucial role in numerous biological processes, including protein and organelle quality control, development, immunity, and metabolism. Hence, dysregulation or mutations in autophagy‐related genes have been implicated in a wide range of human diseases.
Sergio Attanasio
wiley +1 more source
Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample [PDF]
, 2007 Physical dust models are presented for 65 galaxies in SINGS that are strongly detected in the four IRAC bands and three MIPS bands. For each galaxy we estimate (1) the total dust mass, (2) the fraction of the dust mass contributed by PAHs, and (3) the ...
B. Draine +21 more
semanticscholar +1 more source
FEBS Letters, EarlyView.The protonated form of butyrate, as well as other short‐chain fatty acids (SCFAs), is membrane permeable. In acidic extracellular environments, this can lead to intracellular accumulation of SCFAs and cytosolic acidification. This phenomenon will be particularly relevant in acidic environments such as the large intestine or tumor microenvironments ...
Muwei Jiang +2 more
wiley +1 more source
Cascading top-down effects of changing oceanic predator abundances.
Journal of Animal Ecology, 2009 1. Top-down control can be an important determinant of ecosystem structure and function, but in oceanic ecosystems, where cascading effects of predator depletions, recoveries, and invasions could be significant, such effects had rarely been demonstrated ...
J. Baum, B. Worm
semanticscholar +1 more source
Present-day cosmic abundances - A comprehensive study of nearby early B-type stars and implications for stellar and Galactic evolution and interstellar dust models [PDF]
, 2012 Aims. A carefully selected sample of early B-type stars in OB associations and the field within the solar neighbourhood is studi ed comprehensively. Present-day abundances for the astrophysically most interesting chemical elements are derived in order to
M. Nieva, N. Przybilla
semanticscholar +1 more source
Helioseismology and solar abundances [PDF]
Physics Reports, 2008 To appear in Physics Reports.
H. M. Antia, Sarbani Basu
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
H2O ABUNDANCES IN THE ATMOSPHERES OF THREE HOT JUPITERS [PDF]
, 2014 The core accretion theory for giant planet formation predicts enrichment of elemental abundances in planetary envelopes caused by runaway accretion of planetesimals, which is consistent with measured super-solar abundances of C, N, P, S, Xe, and Ar in ...
N. Madhusudhan +4 more
semanticscholar +1 more source