Results 51 to 60 of about 341,037 (270)

Spectroscopy of Nine Cataclysmic Variable Stars

, 2007
We present optical spectroscopy of nine cataclysmic binary stars, mostly dwarf novae, obtained primarily to determine orbital periods Porb. The stars and their periods are LX And, 0.1509743(5) d; CZ Aql, 0.2005(6) d; LU Cam, 0.1499686(4) d; GZ Cnc, 0 ...
Ann B. Kapusta, Bruch A., Bruch A., Casares J., Christopher J. Peters, Cynthia J. Taylor, Dickinson R. J., Holly A. Sheets, Jenniskens P., Jiang X. J., John R. Thorstensen, Kato T., Marsh T. R., Robinson E. L., Uemura M., Warner B.   +15 more
core   +1 more source

New Variable Stars [PDF]

Astronomische Nachrichten, 1896
18 new variable stars have been found among a previously published list of M-type stars. Their photographic stellar magnitudes are determined from observations made in 1970 and 1971.
openaire   +2 more sources

Pleione as a Variable Star [PDF]

Symposium - International Astronomical Union, 1976
The well-known shell star Pleione is also an interesting variable star, BU Tau. Its variability was first discovered by Calder (1937) from photoelectric observations in the 1930's. The light curve of this star from the end of the 19th century to 1954 was studied by Binnendijk (1949, 1955).
V. M. Lyuty, A. S. Sharov
openaire   +2 more sources

Insights into PI3K/AKT signaling in B cell development and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
This Review explores how the phosphoinositide 3‐kinase and protein kinase B pathway shapes B cell development and drives chronic lymphocytic leukemia, a common blood cancer. It examines how signaling levels affect disease progression, addresses treatment challenges, and introduces novel experimental strategies to improve therapies and patient outcomes.
Maike Buchner
wiley   +1 more source

RR Lyrae Stars In The GCVS Observed By The Qatar Exoplanet Survey [PDF]

, 2014
We used the light curve archive of the Qatar Exoplanet Survey (QES) to investigate the RR Lyrae variable stars listed in the General Catalogue of Variable Stars (GCVS).
Alsubai, K. A., Bramich, D. M., Cameron, A. Collier, Ferro, A. Arellano, Horne, K., Parley, N. R., Pollacco, D., West, R. G.   +7 more
core   +1 more source

Making tau amyloid models in vitro: a crucial and underestimated challenge

FEBS Letters, EarlyView.
This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley   +1 more source

Observations of red-giant variable stars by Aboriginal Australians

, 2017
Aboriginal Australians carefully observe the properties and positions of stars, including both overt and subtle changes in their brightness, for subsistence and social application. These observations are encoded in oral tradition.
Allen R. H., Anonymous, Aristotle 350 BCE, Bailey J., Bailey J., Bates D., Battiste M., Berndt R. M., Berndt R. M., Bhathal R., Cairns H. C., Clarke P. A., Clarke P. A., Clarke P. A., Clarke P. A., Clunies Ross M., Frew D. J., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Hamacher D. W., Harmanec P., Haynes R. D., Herschel J. F. W., Hoffleit D., Howitt A., Isles J., Jetsu L., Johnson D. D., Johnson D. D., Leaman T. M., Maegraith B., McNight D., Meyer H. A. E., Mountford C. P., North G., Parker K. L., Prober S. M., Taplin G., Tindale N. B., Tindale N. B., Tindale N. B., White I. M., Wilk S. R., Wilk S. R.   +48 more
core   +1 more source

The cytoskeletal control of B cell receptor and integrin signaling in normal B cells and chronic lymphocytic leukemia

FEBS Letters, EarlyView.
In lymphoid organs, antigen recognition and B cell receptor signaling rely on integrins and the cytoskeleton. Integrins act as mechanoreceptors, couple B cell receptor activation to cytoskeletal remodeling, and support immune synapse formation as well as antigen extraction.
Abhishek Pethe, Tanja Nicole Hartmann
wiley   +1 more source

Interaction vesicles as emerging mediators of host‐pathogen molecular crosstalk and their implications for infection dynamics

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, Izadora Volpato Rossi, Marcel I. Ramirez   +2 more
wiley   +1 more source

Optical and Near-Infrared UBVRIJHK Photometry for the RR Lyrae stars in the Nearby Globular Cluster M4 (NGC 6121)

, 2014
We present optical and near-infrared UBVRIJHK photometry of stars in the Galactic globular cluster M4 (NGC 6121) based upon a large corpus of observations obtained mainly from public astronomical archives. We concentrate on the RR Lyrae variable stars in
Bono, G., Braga, V. F., Buonanno, R., Dall'Ora, M., Ferraro, I., Iannicola, G., Marengo, M., Neeley, J., Stetson, P. B.   +8 more
core   +1 more source