Results 41 to 50 of about 1,642,984 (314)

Chemical element transport in stellar evolution models [PDF]

, 2017
Stellar evolution computations provide the foundation of several methods applied to study the evolutionary properties of stars and stellar populations, both Galactic and extragalactic.
Cassisi, Santi, Salaris, Maurizio
core   +2 more sources

EURAD State-of-the-Art Report: ACED assessment of the chemical evolution at the disposal cell scale—part I—processes at interfaces and evolution at disposal cell scale

Frontiers in Nuclear Engineering
Within the framework of the European Joint Programme on Radioactive Waste Management, the work package ACED–Assessment of chemical evolution of intermediate level (ILW) and high level (HLW) waste at disposal cell scale–used combined experimental and ...
Erika Neeft, Guido Deissmann, Diederik Jacques   +2 more
doaj   +1 more source

Prebiotic Chemistry: Geochemical Context and Reaction Screening

Life, 2013
The origin of life on Earth is widely believed to have required the reactions of organic compounds and their self- and/or environmental organization. What those compounds were remains open to debate, as do the environment in and process or processes by ...
Henderson James Cleaves
doaj   +1 more source

Oxidative Phosphorus Chemistry Perturbed by Minerals

Life, 2022
Life is a complex, open chemical system that must be supported with energy inputs. If one fathoms how simple early life must have been, the complexity of modern-day life is staggering by comparison. A minimally complex system that could plausibly provide
Arthur Omran, Josh Abbatiello, Tian Feng, Matthew A. Pasek   +3 more
doaj   +1 more source

Chemical evolution of the intra-cluster medium [PDF]

, 2003
The high metallicity of the intra-cluster medium (ICM) is generally interpreted on the base of the galactic wind scenario for elliptical galaxies. In this framework, we develop a toy-model to follow the chemical evolution of the ICM, formulated in ...
A. Moretti, Abel, Andreon, Andreon, Arimoto, Arimoto, Arnaboldi, Arnaud, Balogh, Becker, Bica, Bressan, Briceño, Bromm, Bryan, C. Chiosi, Carraro, Chabrier, Chiosi, Chiosi, Chiosi, Ciotti, Cirimele, David, David, David, De Grandi, De Propris, De Young, Djorgovski, Driver, Elbaz, Ettori, Ferguson, Ferguson, Finoguenov, Finoguenov, Fukazawa, Fukazawa, Gibson, Gibson, Girardi, Gregg, Greggio, Hernandez, Hinnes, Irwin, Ishimaru, Johnstone, Kaastra, L. Portinari, Lacey, Larson, Larson, Larson, Larson, Lin, Loewenstein, Loewenstein, Luhman, Marigo, Marigo, Martinelli, Martinelli, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, Mitchell, Mobasher, Mori, Mushotzky, Nath, Padoan, Padoan, Pei, Pipino, Portinari, Press, Reiprich, Renzini, Renzini, Renzini, Roussel, Scalo, Schechter, Serlemitsos, Silk, Smith, Steidel, Tamura, Tantalo, Tinsley, Tornatore, Trentham, Trentham, Trentham, Valdarnini, Vigroux, White, White, White, Woosley, Worthey, Zepf   +105 more
core   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

EURAD State-of-the-Art Report: Assessment of the chemical evolution at the disposal cell scale – part II – gaining insights into the geochemical evolution

Frontiers in Nuclear Engineering
Long time frames are to be considered in the safety and performance assessment of deep geological disposal of intermediate and high level radioactive waste.
Guido Deissmann, Erika Neeft, Diederik Jacques   +2 more
doaj   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

A plausible pathway to prebiotic peptides via amino acid amides on the primordial Earth

Earth and Planetary Physics
The prebiotic synthesis of peptides prior to ribosome-catalyzed processes remains an enigma. The synthesis of abiotic peptides from amino acids (AAs) is primarily constrained by high activation energies and unfavorable thermodynamics, necessitating the ...
DingWei Gan, XiangMin Lei, RenWu Zhou, SongSen Fu, Jing Sun, RuSen Zhou, Kostya (Ken) Ostrikov, YuFen Zhao, JianXi Ying   +8 more
doaj   +1 more source

Molecular Asymmetry in Prebiotic Chemistry: An Account from Meteorites

Life, 2016
Carbonaceous Chondrite (CC) meteorites are fragments of asteroids, solar planetesimals that never became large enough to separate matter by their density, like terrestrial planets.
Sandra Pizzarello
doaj   +1 more source