Results 51 to 60 of about 7,581,489 (212)

Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components [PDF]

Monthly notices of the Royal Astronomical Society, 2019
The decomposition of the Solar system abundances of heavy isotopes into their s- and r- components plays a key role in our understanding of the corresponding nuclear processes and the physics and evolution of their astrophysical sites. We present a new
N. Prantzos, C. Abia, S. Cristallo, M. Limongi, A. Chieffi   +4 more
semanticscholar   +1 more source

Correction to: The introduction history of invasive garden ants in Europe: integrating genetic, chemical and behavioural approaches

BMC Biology, 2018
Reinvestigation of the raw data revealed an unfortunate error in Ugelvig et al. 2008 [1].
Line V. Ugelvig, Falko P. Drijfhout, Daniel J. C. Kronauer, Jacobus J. Boomsma, Jes S. Pedersen, Sylvia Cremer   +5 more
doaj   +1 more source

Chemical evolution with rotating massive star yields - I. The solar neighbourhood and the s-process elements [PDF]

, 2018
We present a comprehensive study of the abundance evolution of the elements from H to U in the Milky Way halo and local disk. We use a consistent chemical evolution model, metallicity dependent isotopic yields from low and intermediate mass stars and ...
N. Prantzos, C. Abia, M. Limongi, A. Chieffi, S. Cristallo   +4 more
semanticscholar   +1 more source

Figuring Out Gas and Galaxies In Enzo (FOGGIE). VIII. Complex and Stochastic Metallicity Gradients at z > 2

The Astrophysical Journal
Gas-phase metallicity gradients are a crucial element in understanding the chemical evolution of galaxies. We use the FOGGIE simulations to study the metallicity gradients (∇ Z ) of six Milky Way–like galaxies throughout their evolution.
Ayan Acharyya, Molly S. Peeples, Jason Tumlinson, Brian W. O’Shea, Cassandra Lochhaas, Anna C. Wright, Raymond C. Simons, Ramona Augustin, Britton D. Smith, Eugene Hyeonmin Lee   +9 more
doaj   +1 more source

Terpene Synthases as Metabolic Gatekeepers in the Evolution of Plant Terpenoid Chemical Diversity

Frontiers in Plant Science, 2019
Terpenoids comprise tens of thousands of small molecule natural products that are widely distributed across all domains of life. Plants produce by far the largest array of terpenoids with various roles in development and chemical ecology.
P. Karunanithi, P. Zerbe
semanticscholar   +1 more source

Two-process Model and Residual Abundance Analysis of the Milky Way Massive Satellites

The Astrophysical Journal
The “two-process model” is a promising technique for interpreting stellar chemical abundance data from large-scale surveys (e.g., the Sloan Digital Sky Survey IV/V and the Galactic Archeology with HERMES survey), enabling more quantitative empirical ...
Sten Hasselquist, Christian R. Hayes, Emily J. Griffith, David Weinberg, Tawny Sit, Rachael L. Beaton, Danny Horta   +6 more
doaj   +1 more source

ChemicalUniverseMachine. I. Uncovering the Cosmic Evolution of Metals in the Galaxy–Interstellar Medium–Circumgalactic Medium Ecosystem

The Astrophysical Journal
We present an empirical chemical evolution model that explains the distribution of metals in the interstellar medium (ISM) and the circumgalactic medium (CGM) of galaxies based on the U niverse M achine and N eutral U niverse M achine models in the ...
Moka Nishigaki, Peter Behroozi, Masami Ouchi, Hong Guo, Rachel S. Somerville, Anna R. Gallazzi, Kimihiko Nakajima, Kuria Watanabe   +7 more
doaj   +1 more source

Direct and indirect effects of chemical contaminants on the behaviour, ecology and evolution of wildlife

Proceedings of the Royal Society of London. Biological Sciences, 2018
Chemical contaminants (e.g. metals, pesticides, pharmaceuticals) are changing ecosystems via effects on wildlife. Indeed, recent work explicitly performed under environmentally realistic conditions reveals that chemical contaminants can have both direct ...
Minna Saaristo, T. Brodin, S. Balshine, M. Bertram, B. Brooks, S. Ehlman, E. McCallum, A. Sih, J. Sundin, B. Wong, K. Arnold   +10 more
semanticscholar   +1 more source

Chemical evolution in hierarchical scenarios

EPJ Web of Conferences, 2012
We studied the chemical properties of Milky-Way mass galaxies. We found common global chemical patterns with particularities which reflect their different assembly histories in a hierarchical scenario.
Tissera P.B.
doaj   +1 more source

Chemical defenses in Sacoglossan Opisthobranchs: Taxonomic trends and evolutionary implications

Scientia Marina, 2004
Sacoglossan sea slugs (Mollusca: Opisthobranchia) are one of the few groups of specialist herbivores in the marine environment. Sacoglossans feed suctorially on the cell sap of macroalgae, from which they "steal" chloroplasts (kleptoplasty) and deterrent
Arnaldo Marín, Joandomènec Ros
doaj   +1 more source