Results 101 to 110 of about 43,339 (292)

Cepheid limb darkening, angular diameter corrections, and projection factor from static spherical model stellar atmospheres

, 2012
Context. One challenge for measuring the Hubble constant using Classical Cepheids is the calibration of the Leavitt Law or period-luminosity relationship.
Baade, Barmby, Barnes, Benedict, Bonanos, Burki, C.-C. Ngeow, Claret, Claret, Claret, Clement, Davis, Fouqué, Freedman, Getting, Gieren, Gieren, Gieren, Gray, Groenewegen, H. R. Neilson, Hindsley, J. Storm, Kanbur, Keller, Kervella, Kervella, Kovács, Kurucz, Leavitt, Lester, Marengo, Marengo, Marengo, Marengo, Mourard, Mérand, Mérand, Mérand, N. Nardetto, Nardetto, Nardetto, Nardetto, Nardetto, Neilson, Neilson, Neilson, Neilson, Neilson, Neilson, Ngeow, Ngeow, P. Fouqué, Parsons, Pietrzyński, Riess, Riess, Sabbey, Sasselov, Sasselov, Sasselov, Storm, Storm, Turner, van Leeuwen, Wesselink, Windmark   +66 more
core   +3 more sources

Aquaporin‐3 and aquaporin‐5 impact the development of pancreatic ductal adenocarcinoma spheroids

FEBS Open Bio, EarlyView.
Schematic representation of the role of aquaporin‐3 (AQP3) and aquaporin‐5 (AQP5) in pancreatic ductal adenocarcinoma (PDAC). Both proteins are upregulated in PDAC and are associated with tumor progression and metastatic potential. Silencing AQP3 or AQP5 in PDAC spheroids results in decreased diameter, area, and overall growth, underscoring their key ...
Catarina Pimpão, Diogo M. Engrácia, Graça Soveral, Filipa Mendes   +3 more
wiley   +1 more source

The Influence of Stellar Chromospheres and Coronae on Exoplanet Transmission Spectroscopy

The Astrophysical Journal Letters
A main source of bias in transmission spectroscopy of exoplanet atmospheres is magnetic activity of the host star in the form of stellar spots, faculae, or flares. However, the fact that main-sequence stars have a chromosphere and a corona and that these
Volker Perdelwitz, Adam Chaikin-Lifshitz, Aviv Ofir, Oded Aharonson   +3 more
doaj   +1 more source

The stellar atmosphere simulation code Bifrost

, 2011
Context: Numerical simulations of stellar convection and photospheres have been developed to the point where detailed shapes of observed spectral lines can be explained.
Abbett, Arber, Arnaud, B. V. Gudiksen, Carlsson, Carlsson, Carlsson, Carlsson, Cheung, De Pontieu, DeVore, Dorfi, Galsgaard, Gudiksen, Gustafsson, Hansteen, Hansteen, Hansteen, Hayek, Heggland, Heinemann, Isobe, J. Leenaarts, J. Martínez-Sykora, Keller, Leenaarts, Leenaarts, M. Carlsson, Martínez-Sykora, Martínez-Sykora, Martínez-Sykora, Nordlund, Orszag, Rempel, Ryu, Shull, Skartlien, Sod, Stein, Thompson, Tortosa-Andreu, Trujillo Bueno, Tsuji, Tóth, V. H. Hansteen, Vernazza, Vögler, W. Hayek, Wedemeyer-Böhm, Woodall   +49 more
core   +1 more source

Hyperosmotic stress‐induced redistribution of pre‐mRNA cleavage factor I subunits is associated with shifts in alternative polyadenylation

FEBS Open Bio, EarlyView.
Hyperosmotic stress triggers the relocation of the CFIm complex from the nucleus to the cytoplasm. This shift creates a nuclear ‘stoichiometric bottleneck’, limiting CFIm availability for mRNA processing. Consequently, specific mRNAs like NUDT21 and DICER1 undergo targeted 3′UTR shortening, demonstrating how spatial protein dynamics drive rapid ...
Hitomi Soumiya, Masatake Osawa, Hidefumi Fukumitsu   +2 more
wiley   +1 more source

Empirical Prediction of Plasma Emission Measure Distributions and X-Ray/Extreme-ultraviolet Spectra of Late-type Stars

The Astrophysical Journal
High-energy emission spectra from the outer atmospheres of late-type stars represent an important feature of the stellar activity in several contexts, such as the photoevaporation and photochemistry of planetary atmospheres or the modeling of irradiated ...
A. Maggio, I. Pillitteri, J. Sanz-Forcada, G. Micela   +3 more
doaj   +1 more source

THE EFFECTIVE TEMPERATURE DETERMINATION OF O-B STARS BY H AND He RADIO RECOMBINATION LINES OBSERVATIONS

Odessa Astronomical Publications, 2017
It is proposed to evaluate, on the basis of H and He radio recombination line observations, the number ratio of stellar photons, capable to ionize helium, to those capable to ionize hydrogen.
A. P. Tsivilev
doaj   +1 more source

Evaluating the involvement of autolysosomes in the nuclear translocation of fluorescent proteins

FEBS Open Bio, EarlyView.
Endogenously expressed fluorescent proteins can be degraded by autophagy and transported to cell nuclei via the nuclear pore complex. But in some cell lines, for example, HeLa cells which are positive for immunoreactivity of a receptor ligand, such as UCN I, in cell nuclei, fusion of autolysosome with the nuclear envelope is involved in the nuclear ...
Keiichi Ikeda
wiley   +1 more source

Pressure in Stellar Atmospheres [PDF]

Nature, 1911
WITHIN the last fifteen years the spectroscopic equipment applied to the study of both laboratory and celestial investigation has been very materially modified both in dispersive power and design. In the early nineties there were very few of the 21.5-feet Rowland concave grating spectrographs in regular commission for terrestrial research, and it is ...
openaire   +1 more source

Loss of AMBRA1 activates MAPK and angiogenesis signaling pathways in melanoma cells

FEBS Open Bio, EarlyView.
Loss of AMBRA1 in melanoma cells activates multiple oncogenic pathways associated with tumor progression. Transcriptomic and protein network analyses revealed that AMBRA1 depletion enhances MAPK/ERK signaling, angiogenesis, TGF‐β/EMT signaling, and Wnt/axon guidance pathways.
Milad Ibrahim, Marco Corazzari, Iman Osman, Jane Armstrong, Noel Carter   +4 more
wiley   +1 more source