Results 61 to 70 of about 59,474 (295)
Galactic and Cosmic Chemical Evolution with Hypernovae
, 2005 We provide new nucleosynthesis yields depending on metallicity and energy (i.e., (normal supernovae and hypernovae), and show the evolution of heavy element abundances from C to Zn in the solar neighborhood.
Kobayashi, Chiaki
core +1 more source
The Chemical Evolution of the Galaxy: the two-infall model [PDF]
, 1996 In this paper we present a new chemical evolution model for the Galaxy which assumes two main infall episodes for the formation of halo-thick disk and thin disk, respectively. We do not try to take into account explicitly the evolution of the halo but we
C. +5 more
core +2 more sources
Edible Pneumatic Battery for Sustained and Repeated Robot Actuation
Advanced Science, EarlyView.This work presents an edible energy source and valve system to power soft, pneumatically driven edible robots. A chemical reaction between sodium bicarbonate and citric acid generates carbon dioxide gas, and a pressure‐triggered edible valve enables self‐repetitive motion of the edible actuator.
Bokeon Kwak +5 more
wiley +1 more source
The Astrophysical JournalWe present He i /H β flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from He i λ ...
Hiroto Yanagisawa +16 more
doaj +1 more source
On the Chemical Evolution of Our Galaxy [PDF]
Publications of the Astronomical Society of Japan, 1996 We have investigated the chemical evolution of the solar neighborhood with a particular emphasis on the helium abundance and the current supernova (SN) rate, while taking into account the effects of the stellar mass loss on nucleosynthesis in stars. We found that the Scalo IMF can reproduce the solar-helium abundance as well as the current ratio of ...
Kuniko Mihara, Fumio Takahara
openaire +1 more source
Diversity and Ecological Potentials of Marine Viruses Inhabiting Continental Shelf Seas
Advanced Science, EarlyView.To the best of the knowledge, this study provides the largest viral genome dataset from a continental shelf sea. It reveals that over half of vOTUs are novel, highlighting the remarkable viral novelty in the eastern continental shelf seas of China (ECSSC).
Xiaoyue Guo +9 more
wiley +1 more source
The mass-metallicity relation of tidal dwarf galaxies
, 2015 Dwarf galaxies generally follow a mass-metallicity (MZ) relation, where more massive objects retain a larger fraction of heavy elements. Young tidal dwarf galaxies (TDGs), born in the tidal tails produced by interacting gas-rich galaxies, have been ...
Kroupa, P., Ploeckinger, S., Recchi, S.
core +1 more source
Advanced Science, EarlyView.A microneedle spoilage sensor for packaged food products is presented. The sensor is composed entirely of food‐derived agents, integrated together using a novel material processing approach. This resultant platform nondestructively reports spoilage state in real‐time through a colorimetric output.
Shadman Khan +5 more
wiley +1 more source
Planetary nebulae in the inner Milky Way: new abundances [PDF]
, 2009 The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of these abundances, which is associated with the evolution of intermediate-mass ...
Cavichia, O. +2 more
core +2 more sources
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 +56 more
core +1 more source