Results 111 to 120 of about 7,461,069 (375)

An Introduction to Galactic Chemical Evolution

, 2007
The formalism of the simple model of galactic chemical evolution (GCE) and its main ingredients (stellar properties, initial mass function, star formation rate and gas flows) are presented in this tutorial.
Arnett, Boissier, Boissier, Bonnell, Cayrel, Cayrel, Chabrier, Chieffi, Dekel, Diemand, Edmunds, Edvardsson, Eggen, Elmegreen, Fukugita, Gibson, Glover, Goriely, Goriely, Goswami, Greggio, Hartwick, Haywood, Hebrard, Heger, Iwamoto, Kennicutt, Kilic, Kroupa, Linsky, Lodders, Mannucci, Marigo, N. Prantzos, Nakamura, Nomoto, Nordström, Ohkubo, Prantzos, Prantzos, Prantzos, Prantzos, Prantzos, Prantzos, Ryan, Salaris, Salpeter, Salvadori, Scalo, Schaller, Schmidt, Schmidt, Spite, Thielemann, Thorsett, Tinsley, Umeda, van den Hoek, Weidemann, Weidner, Woosley, Woosley   +61 more
core   +1 more source

CHEMICAL EVOLUTION LIBRARY FOR GALAXY FORMATION SIMULATION [PDF]

, 2016
We have developed a software library for chemical evolution simulations of galaxy formation under the simple stellar population (SSP) approximation. In this library, all of the necessary components concerning chemical evolution, such as initial mass ...
T. Saitoh
semanticscholar   +1 more source

PN and Galactic Chemical Evolution [PDF]

Symposium - International Astronomical Union, 2003
Recent applications of PN to the study of galactic chemical evolution are reviewed, such as PN and stellar populations, abundance gradients, including their space and time variations, determination of the He/H radial gradient and of the helium-to-metals enrichment ratio, and the [O/Fe] x [Fe/H] relation in the solar neighbourhood and in the galactic ...
Walter J. Maciel, Roberto Costa
openaire   +2 more sources

Social context prevents heat hormetic effects against mutagens during fish development

FEBS Letters, EarlyView.
This study shows that sublethal heat stress protects fish embryos against ultraviolet radiation, a concept known as ‘hormesis’. However, chemical stress transmission between fish embryos negates this protective effect. By providing evidence for the mechanistic molecular basis of heat stress hormesis and interindividual stress communication, this study ...
Lauric Feugere, Claudio Silva De Freitas, Adam Bates, Kenneth B. Storey, Pedro Beltran‐Alvarez, Katharina C. Wollenberg Valero   +5 more
wiley   +1 more source

Physiological characterization of a new thermotolerant yeast strain isolated during Brazilian ethanol production, and its application in high-temperature fermentation

Biotechnology for Biofuels, 2020
Background The use of thermotolerant yeast strains can improve the efficiency of ethanol fermentation, allowing fermentation to occur at temperatures higher than 40 °C.
Cleiton D. Prado, Gustavo P. L. Mandrujano, Jonas. P. Souza, Flávia B. Sgobbi, Hosana R. Novaes, João P. M. O. da Silva, Mateus H. R. Alves, Kevy P. Eliodório, Gabriel C. G. Cunha, Reinaldo Giudici, Diele P. Procópio, Thiago O. Basso, Iran Malavazi, Anderson F. Cunha   +13 more
doaj   +1 more source

Chemical roots of biological evolution: the origins of life as a process of development of autonomous functional systems [PDF]

Open Biology, 2017
In recent years, an extension of the Darwinian framework is being considered for the study of prebiotic chemical evolution, shifting the attention from homogeneous populations of naked molecular species to populations of heterogeneous, compartmentalized ...
Kepa Ruiz-Mirazo, Carlos Briones, Andrés de la Escosura   +2 more
doaj   +1 more source

Chemical Evolution of Protostars [PDF]

Astrophysics and Space Science, 2005
This review discusses the evolution of the chemical composition of the molecular gas throughout the process of star formation. It covers the initial stages of cloud-core formation, gravitational collapse and the formation of the star, the effects of stellar radiation and outflows on the surrounding cloud, and the composition of the circumstellar disk ...
openaire   +2 more sources

Interaction vesicles as emerging mediators of host‐pathogen molecular crosstalk and their implications for infection dynamics

FEBS Letters, EarlyView.
Interaction extracellular vesicles (iEVs) are hybrid vesicles formed through host‐pathogen communication. They facilitate immune evasion, transfer pathogens' molecules, increase host cell uptake, and enhance virulence. This Perspective article illustrates the multifunctional roles of iEVs and highlights their emerging relevance in infection dynamics ...
Bruna Sabatke, Izadora Volpato Rossi, Marcel I. Ramirez   +2 more
wiley   +1 more source

Hydro- Chemical Evolution of Palk Strait Region, Bay of Bengal [PDF]

, 2012
Present analysis was carried out the physico- chemical parameters of two stations such as Thondi and Soliyakudi in the southeast Palk Strait region during the monsoon and post monsoon seasons (November 2008 – March 2009).
Arulpriya, M. (Mani), govindasamy, C. (chinavenkataraman), Meenakshi, V. R. (V), Ruban, P. (Packiasamy)   +3 more
core  

Carbon and oxygen in H II regions of the Magellanic Clouds: abundance discrepancy and chemical evolution [PDF]

, 2017
We present C and O abundances in the Magellanic Clouds derived from deep spectra of HII regions. The data have been taken with the Ultraviolet-Visual Echelle Spectrograph at the 8.2-m VLT. The sample comprises 5 HII regions in the Large Magellanic Cloud (
L. Cipriano, G. Dom'inguez-Guzm'an, C. Esteban, J. Garc'ia-Rojas, A. Mesa-Delgado, F. Bresolin, M. Rodr'iguez, S. S. Iac, Spain., Dep. Astrof'isica Ull, Inaoe, Mexico., P. Catolica, Chile., Institute for Astronomy, Usa   +15 more
semanticscholar   +1 more source