Results 71 to 80 of about 59,640 (247)

Chemical Evolution of Low Mass Disc Galaxies [PDF]

, 1999
We show that the multiphase chemical evolution model reproduces the correlations obtained along the spiral sequence, dwarf galaxies included. However the apparent spatial chemical uniformity observed in some irregular galaxies cannot be reproduced with it. An evolutionary model has been developed and tested to explain flat gradients.
Molla, Mercedes, Roy, Jean-Rene
openaire   +2 more sources

A chemical evolution model for galaxy clusters [PDF]

, 2001
We develop a toy-model for the chemical evolution of the intracluster medium, polluted by the galactic winds from elliptical galaxies. The model follows the "galaxy formation history" of cluster galaxies, constrained by the observed luminosity function ...
Chiosi, C., Moretti, A., Portinari, L.
core   +1 more source

Mapping Multiphase Metals in Star-forming Galaxies: A Spatially Resolved UV+Optical Study of NGC 5253

The Astrophysical Journal
We present a pioneering, spatially resolved, multiphase gas abundance study on the blue compact dwarf galaxy NGC 5253, targeting 10 star-forming (SF) clusters inside six far-UV (FUV) Hubble Space Telescope/Cosmic Origins Spectrograph (COS) pointings with
Valentina Abril-Melgarejo, Bethan L. James, Alessandra Aloisi, Matilde Mingozzi, Vianney Lebouteiller, Svea Hernandez, Nimisha Kumari, AAS Journals Data Editors   +7 more
doaj   +1 more source

Dynamical and chemical evolution of NGC1569

, 2005
Blue Compact Dwarf and Dwarf Irregular galaxies are generally believed to be unevolved objects, due to their blue colors, compact appearance and large gas fractions.
Aguirre, Aloisi, Aloisi, Alvensleben, Anders, Angeretti, Aparicio, Arnone, Arp, Babul, Blitz, Bradamante, Böhringer, Centurión, Chiappini, Chiappini, Chiappini, Ciotti, D'Ercole, de Heij, de Marchi, Dyson, Ellis, F. Matteucci, Fagotto, Finoguenov, G. Hensler, Gallagher, Gastaldello, Gibson, Greggio, Heckman, Henry, Herwig, Israel, Izotov, Izotov, Izotov, Kennicutt, Kobulnicky, Kobulnicky, Kunth, Köppen, L. Angeretti, Lilly, Loewenstein, Marcolini, Marconi, Marconi, Martin, Martin, Masegosa, Matsushita, Matteucci, Matteucci, Meynet, Momany, Mori, Mori, Mühle, Mühle, Olofsson, Origlia, Ostriker, Ott, Pagel, Pilyugin, Pipino, Pipino, Reakes, Recchi, Recchi, Recchi, Renzini, Renzini, Roediger, Romano, Ruiz-Lapuente, S. Recchi, Searle, Skillman, Spite, Sternberg, Stil, Stil, Tinsley, Tosi, Tozzi, Vallenari, van den Hoek, van Zee, Vílchez, Weidner, Woosley, Östlin   +94 more
core   +1 more source

The Curious Case of CysE: Diversity and Distribution of Serine Acetyltransferases in Bacteria

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT Serine acetyltransferase (CysE) is a member of the left‐handed β‐helix family of acetyltransferases that catalyze the rate limiting step in de novo cysteine biosynthesis. There are two isoforms of CysE that differ in length, with the shorter isoform lacking approximately 76 amino acids at the N‐terminus of the protein from the serine ...
Keely E. A. Oldham, Adele K. Williamson, Emily K. Grout, Joanna L. Hicks   +3 more
wiley   +1 more source

Chemical behavior of the Dwarf Irregular Galaxy NGC 6822. Its PN and HII region abundances

, 2009
We aim to derive the chemical behavior of a significant sample of PNe and HII regions in the irregular galaxy NGC 6822 The selected objects are distributed in different zones of the galaxy.
Allen, Bauman, Brandenburg, Carigi, Carigi, Carigi, Costa, de Blok, de Blok, Demers, Dufour, Fisher, Franco, Gieren, Grevesse, Henry, Henry, Hernández-Martínez, Herwig, Hidalgo-Gámez, Hirschi, Hirschi, Hodge, J. García-Rojas, Karakas, Killen, Kingdon, Kingsburgh, Kniazev, Kroupa, L. Carigi, L. Hernández-Martínez, Lee, Leisy, Leisy, Leisy, M. Peña, Magrini, Magrini, Marigo, Massey, Mateo, Meynet, Nomoto, Peimbert, Peimbert, Peña, Porter, Richer, Richer, Seaton, Shaw, Stasinska, Storey, Venn, Wang, Woosley   +56 more
core   +1 more source

Mind and Cosmos as Throughput Systems: A Convergence Through the Throughput Model

Systems Research and Behavioral Science, EarlyView.
ABSTRACT This paper advances a conceptual and mathematical foundations approach by applying the throughput model (TPM) to cosmic phenomena, reframing the universe as an extended information processing system. TPM's four stages, Perception, Information, Judgement and Decision Choice, are reformulated in explicit information‐theoretic and dynamical ...
Waymond Rodgers
wiley   +1 more source

The Chemical Evolution of Narrow Emission Line Galaxies: the Key to their Formation Processes The Chemical Evolution of Narrow Emission Line Galaxies: the Key to their Formation Processes

Acta Universitaria, 2012
Utilizando la mayor muestra de galaxias con líneas de emisión angostas disponible hasta el momento, se muestra que sus características espectrales están correlacionadas con diferentes parámetros físicos, como las abundancias químicas, las morfologías ...
R. A. Ortega-Minakata, R. Coziol, J. P Torres-Papaqui   +2 more
doaj  

The IMF of Extremely Metal-Poor Stars and the Probe into the Star-Formation Process of the Milky Way

, 2007
We discuss the star formation history of the Galaxy, based on the observations of extremely metal-poor stars (EMP) in the Galactic halo, to gain an insight into the evolution and structure formation in the early universe.
Fujimoto, Masayuki Y., Habe, Asao, Komiya, Yutaka, Suda, Takuma   +3 more
core   +1 more source

Diving Deeper Into Mechanisms of Acrylamide‐Induced Toxicity: RNA Sequencing Reveals Transcriptomic Alteration and Retrotransposon Expression in Drosophila melanogaster

Environmental Toxicology, EarlyView.
ABSTRACT Given the inevitability of human and animal exposure to acrylamide, there is increasing concern regarding its potential health risks. While a number of molecular mechanisms have been proposed, the complexity of acrylamide toxicological pathways and interactions remains incompletely characterized.
Oluwabukola Mary Farodoye, Titilayomi Ayomide Otenaike, Daniela Moreira Mombach, Monica Medeiros Silva, Amos Olalekan Abolaji, Elgion Lucio Da Silva Loreto   +5 more
wiley   +1 more source