Results 111 to 120 of about 7,622,829 (352)
Chemical abundance studies of CP stars in open clusters [PDF]
arXiv, 2013 In stellar astrophysics, the study of the atmospheres of early-type stars plays a very special role. The atmospheres of these stars display a variety of different phenomena, such as the presence of large magnetic fields, strong surface convection, pulsation, diffusion of chemical elements.
arxiv
Recent Advances in Electrocatalytic Hydrogen Evolution Using Nanoparticles.
Chemical Reviews, 2019 Hydrogen fuel is considered as the cleanest renewable resource and the primary alternative to fossil fuels for future energy supply. Sustainable hydrogen generation is the major prerequisite to realize future hydrogen economy.
Jing Zhu +4 more
semanticscholar +1 more source
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 +2 more
wiley +1 more source
Laserocarpum, a new genus of Apiaceae endemic to Greece
Acta Societatis Botanicorum Poloniae, 2019 Laserpitium pseudomeum is an endemic umbellifer of Greece occurring in the mountains of Sterea Ellas and northern Peloponnese. Molecular data indicate that it is not related to its putative congeners, but instead constitutes an isolated lineage.
Krzysztof Spalik +5 more
doaj +1 more source
Bacterial symbionts support larval sap feeding and adult folivory in (semi-)aquatic reed beetles
Nature Communications, 2020 Symbiotic microbes in insects can enable their hosts to access untapped nutritional resources. Here, the authors show that symbiotic bacteria in reed beetles can provide essential amino acids to sap-feeding larvae and help leaf-feeding adults to degrade ...
Frank Reis +8 more
doaj +1 more source
PNe as observational constraints in chemical evolution models for NGC 6822 [PDF]
arXiv, 2011 Chemical evolution models are useful for understanding the formation and evolution of stars and galaxies. Model predictions will be more robust as more observational constraints are used. We present chemical evolution models for the dwarf irregular galaxy NGC 6822 using chemical abundances of old and young Planetary Nebulae (PNe) and \ion{H}{ii ...
arxiv
Planetary Nebulae as Probes of Stellar Evolution and Populations
, 1999 Planetary Nebulae (PNe) have been used satisfactory to test the effects of stellar evolution on the Galactic chemical environment. Moreover, a link exists between nebular morphology and stellar populations and evolution.
A Renzini +14 more
core +2 more sources
FEBS Letters, EarlyView.Heart failure with preserved ejection fraction (HFpEF) accounts for half of the heart failure cases. It is characterised by microvascular dysfunction, associated with reduced pericyte coverage and diminished STAT3 expression in pericytes. Loss of STAT3 impairs pericyte adhesion, promotes senescence, and activates a pro‐fibrotic gene program.
Leah Rebecca Vanicek +15 more
wiley +1 more source
Nature Communications, 2015 A grand challenge in materials research is to understand complex electronic correlation and non-equilibrium atomic interactions, and how such intrinsic properties and dynamic processes affect energy transfer and defect evolution in irradiated materials ...
Yanwen Zhang +14 more
semanticscholar +1 more source
`Pure' Supernovae and Accelerated Expansion of the Universe
, 2011 A special class of type Ia supernovae that is not subject to ordinary and additional intragalactic gray absorption and chemical evolution has been identified.
A. Aguirre +26 more
core +1 more source