Results 121 to 130 of about 288,189 (359)
Detailed opacity calculations for astrophysical applications
, 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
Helmeted hornbill cranial kinesis: Balancing mobility and stability in a high‐impact joint
The Anatomical Record, EarlyView.Abstract Prokinesis—in which a craniofacial joint allows the rostrum to move relative to the braincase—is thought to confer diverse advantages in birds, mostly for feeding. A craniofacial joint would, however, be a weak link if cranial stability is important. Paradoxically, we have identified a craniofacial joint in helmeted hornbills (Rhinoplax vigil),
Mike Schindler +8 more
wiley +1 more source
The Composition of Dust in Jupiter-Family Comets as Inferred from Infrared Spectroscopy
, 2008 We review the composition of Jupiter-family comet dust as inferred from infrared spectroscopy. We find that Jupiter-family comets have 10 micron silicate emission features with fluxes roughly 20-25% over the dust continuum (emission strength 1.20-1.25 ...
Kelley, Michael S., Wooden, Diane H.
core +1 more source
The Slow‐Rotating Nucleus of Comet C/2013 R1 (Lovejoy)
Astronomische Nachrichten, EarlyView.ABSTRACT The close approach of comet C/2013 R1 (Lovejoy) allowed us to conduct an in‐depth study of the morphology of the inner coma. From the measurement of the dust emission structures expanding near the cometary nucleus in November–December 2013, we derived a slow rotation period of 47.8±1.2$$ 47.8\pm 1.2 $$ h.
Federico Manzini +12 more
wiley +1 more source
Near-Earth Asteroids as Possible Parent Bodies of Meteor Streams [PDF]
Учёные записки Казанского университета: Серия Естественные науки, 2016 The genetic relationship of meteor streams with near-Earth asteroids (NEAs) is being actively studied. A genetic link with the asteroid is possible only for streams in which meteoroids have the geocentric speed smaller than 50 km/s, thereby meaning the ...
M.G. Sokolova, M.V. Sergienko
doaj
Seeing Halley's Comet: A guide for observers in the Northern Hemisphere [PDF]
A guide for the observation of Halley's comet is presented. The path of the comet is described for the fly by dates and charts are provided for location of the comet in the morning or evening skies.
core +1 more source
Evolution of the Dust Coma in Comet 67P/Churyumov-Gerasimenko Before 2009 Perihelion
, 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
Approaches to repurposing reverse transcriptase antivirals in cancer
British Journal of Clinical Pharmacology, EarlyView.This review highlights the role of reverse transcriptase (RT) inhibition in cellular regulation associated with non‐terminal repeat retrotransposons and endogenous retroviruses. Based on their pleiotropic characteristics, RT inhibitors (RTIs) are discussed as potential anticancer agents.
Richard Head +2 more
wiley +1 more source
Redes sociales y acción colectiva.
REDES: Revista Hispana para el Análisis de Redes Sociales, 2007 Reseña: Varanda, M. (2005). La réorganisation du commerce d’un centre-ville: Résistances et obstacles à l’action collective. Paris: Ed. L’Harmattan.
Comet, Catherine
doaj +3 more sources
Biotechnology and Bioengineering, EarlyView.The authors present a streamlined cascade reaction for one‐pot N‐C rearrangement of uridine‐5′‐phosphate (UMP) to pseudouridine‐5′‐phosphate (ΨMP; a key mRNA vaccine building block), in two enzymatic steps catalyzed by UMP nucleosidase (EC 3.2.2.10) and ΨMP C‐glycosidase (EC 4.2.1.70).
Martin Pfeiffer +2 more
wiley +1 more source