Results 21 to 30 of about 477,042 (311)

Influence of chemical denudation on hillslope morphology [PDF]

open access: yes, 2004
[1] Models of hillslope evolution involving diffusion-like sediment transport are conventionally presented as an equation in which the changes in land-surface elevation or soil thickness are balanced by the divergence of soil transport and tectonic ...
Furbish, D. J.   +3 more
core   +1 more source

EMPRESS. XI. SDSS and JWST Search for Local and z ∼4–5 Extremely Metal-poor Galaxies (EMPGs): Clustering and Chemical Properties of Local EMPGs

open access: yesThe Astrophysical Journal, 2023
We search for local extremely metal-poor galaxies (EMPGs), selecting photometric candidates by broadband color excess and machine-learning techniques with the SDSS photometric data.
Moka Nishigaki   +18 more
doaj   +1 more source

Chemical and kinematical evolution in nearby dwarf spheroidal galaxies [PDF]

open access: yes, 2006
Dwarf spheroidal (dSph) galaxies are the least massive and luminous objects known to exist. These galaxies are often considered as the fossil building blocks of massive systems predicted by some cosmological models.
Koch, Andreas
core   +1 more source

The chemical evolution of IC 10 [PDF]

open access: yesAstronomy and Astrophysics, 2010
Dwarf irregular galaxies are relatively simple unevolved objects where it is easy to test models of galactic chemical evolution. We attempt to determine the star formation and gas accretion history of IC10, a local dwarf irregular for which abundance, gas, and mass determinations are available. We apply detailed chemical evolution models to predict the
Yin J.   +5 more
openaire   +3 more sources

Maternal behaviour and the evolution of chemical signalling by offspring in the European earwig (Forficula auricularia) [PDF]

open access: yes, 2011
Parental care provided to current offspring such as food and/or protection increases offspring development and survival which contributes to the parent’s fitness.
Mas, Flore
core   +1 more source

Chemical evolution

open access: yes, 2008
In this series of lectures we first describe the basic ingredients of galactic chemical evolution and discuss both analytical and numerical models. Then we compare model results for the Milky Way, Dwarf Irregulars, Quasars and the Intra-Cluster- Medium with abundances derived from emission lines.
Horst Rauchfuss, Terence N. Mitchell
openaire   +3 more sources

Chemical master versus chemical langevin for first-order reaction networks [PDF]

open access: yes, 2008
Markov jump processes are widely used to model interacting species in circumstances where discreteness and stochasticity are relevant. Such models have been particularly successful in computational cell biology, and in this case, the interactions are ...
Higham, Desmond J., Khanin, Raya
core   +1 more source

Enzymatic synthesis and nanopore sequencing of 12-letter supernumerary DNA

open access: yesNature Communications, 2023
The 4-letter DNA alphabet (A, T, G, C) as found in Nature is an elegant, yet non-exhaustive solution to the problem of storage, transfer, and evolution of biological information.
Hinako Kawabe   +11 more
doaj   +1 more source

Survival of the Sawfly Athalia rosae Upon Infection by an Entomopathogenic Fungus and in Relation to Clerodanoid Uptake

open access: yesFrontiers in Physiology, 2021
Larvae of the turnip sawfly Athalia rosae are a pest of Brassicacae plants, as their feeding can cause defoliation of various crops of economic importance.
Caroline Zanchi   +5 more
doaj   +1 more source

Stellar Chemical Evolution [PDF]

open access: yesSymposium - International Astronomical Union, 1997
One of the major achievements of astrophysics has been the demonstration that most of the chemical elements have been synthesized in stars: nucleosynthesis calculations of homogeneous and inhomogeneous big bang cosmologies show that, in comparison with the most metal-poor stars currently known, essentially no elements heavier than B existed at the era ...
openaire   +1 more source

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