Results 101 to 110 of about 291,896 (358)

Comets [PDF]

open access: yesScientific American, 1884
n ...
openaire   +2 more sources

Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta

open access: yes, 2017
Cometary ices are rich in CO2, CO and organic volatile compounds, but the carbon content of cometary dust was only measured for the Oort Cloud comet 1P/Halley, during its flyby in 1986.
A. Bardyn   +25 more
semanticscholar   +1 more source

IncRNA‐ZFAS1, an Emerging Gate‐Keeper in DNA Damage‐Dependent Transcriptional Regulation

open access: yesAdvanced Science, EarlyView.
LncZFAS1 plays a crucial role during DNA damage response in mammalian cells. Loss of lncZFAS1 results in deficient DNA lesion removal and reduced cell viability. Mechanistically, lncZFAS1 modulates RNAPII phosphorylation and transcription and thereby promotes both GG‐NER and TC‐NER upon UV damage.
Jiena Liu   +10 more
wiley   +1 more source

Detailed opacity calculations for astrophysical applications

open access: yes, 2017
Nowadays, several opacity codes are able to provide data for stellar structure models, but the computed opacities may show significant differences. In this work, we present state-of-the-art precise spectral opacity calculations, illustrated by stellar ...
Comet, Maxime   +2 more
core   +2 more sources

POLE Deficiency Exacerbates Diesel Engine Exhaust‐Induced Genomic Instability and Malignant Transformation of Bronchial Epithelial Cells

open access: yesAdvanced Science, EarlyView.
This study establishes a diesel engine exhaust (DEE)‐induced malignant transformation model in bronchial epithelial cells. Whole genome sequencing(WGS) and RNA‐seq reveal DEE‐induced mutational signatures and gene expression profiles. Mechanistically, DEEaffect polymerase epsilon (POLE) and mismatch repair, driving genomic instability and promoting ...
Pimei Zhang   +8 more
wiley   +1 more source

Alice: The Rosetta Ultraviolet Imaging Spectrograph

open access: yes, 2006
We describe the design, performance and scientific objectives of the NASA-funded ALICE instrument aboard the ESA Rosetta asteroid flyby/comet rendezvous mission.
A'Hearn, M. F.   +10 more
core   +3 more sources

Solar-insolation-induced changes in the coma morphology of comet 67P/Churyumov-Gerasimenko. Optical monitoring with the Nordic Optical Telescope [PDF]

open access: yes, 2017
Context. 67P/Churyumov-Gerasimenko (67P/C-G) is a short-period Jupiter family comet with an orbital period of 6.55 years. Being the target comet of ESA’s Rosetta mission, 67P/C-G has become one of the most intensively studied minor bodies of the Solar ...
A. Somero   +21 more
core   +1 more source

Simultaneous Observation of Negatively and Positively Charged Nanograins at Comet 67P/Churyumov‐Gerasimenko

open access: yesGeophysical Research Letters, 2020
Observations near comet 67P by Rosetta show evidence of charged nanograins. Specifically, the ion and electron sensor (IES) observed negative particles with energy/charge (E/q) consistent with charged nanograins.
K. LLera   +3 more
doaj   +1 more source

An Anisotropic Gold‐Palladium Heterostructured Nanosystem for Synergistically Overcoming Radioresistance and Enhancing Melanoma Radioimmunotherapy

open access: yesAdvanced Science, EarlyView.
A multifunctional anisotropic Au‐Pd heterostructured nanosystem is developed that incorporates a plasmonically enhanced Au‐Pd core, with a shell composed of a biodegradable, Mn‐doped targeting peptide. The nanosystem integrates photothermal, radiotherapeutic, and immunomodulatory functions.
Cheng Chen   +8 more
wiley   +1 more source

Evolution of the Dust Coma in Comet 67P/Churyumov-Gerasimenko Before 2009 Perihelion

open access: yes, 2011
Comet 67P/Churyumov-Gerasimenko is the main target of ESA's Rosetta mission and will be encountered in May 2014. As the spacecraft shall be in orbit the comet nucleus before and after release of the lander {\it Philae}, it is necessary necessary to know ...
Agarwal   +39 more
core   +1 more source

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