Results 81 to 90 of about 508,501 (339)

Evolutionary interplay between viruses and R‐loops

FEBS Letters, EarlyView.
Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi, Zita Képes, Zoltán Szabó, Eszter Csoma, Lóránt Székvölgyi   +4 more
wiley   +1 more source

Speckle Interferometry at SOAR Telescope in 2023

The Astronomical Journal
Results of the speckle-interferometry observations at the 4.1 m Southern Astrophysical Research Telescope obtained during 2023 are presented: 1913 measurements of 1533 resolved pairs or subsystems (median separation 0.″16) and nonresolutions of 552 ...
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez, Edgardo Costa   +3 more
doaj   +1 more source

Multiple star formation

, 2023
It has been shown that the vast proportion of stars are not alone, with ~40% of stars comparable in mass to our Sun (e.g. Raghavan+ 2010) and ~90% of the most massive stars (e.g. Sana+ 2012) existing in at least a binary system. This multiplicity has the potential to vastly change a star's life should it interact with a companion, but despite its ...
openaire   +1 more source

Circulating histones as clinical biomarkers in critically ill conditions

FEBS Letters, EarlyView.
Circulating histones are emerging as promising biomarkers in critical illness due to their diagnostic, prognostic, and therapeutic potential. Detection methods such as ELISA and mass spectrometry provide reliable approaches for quantifying histone levels in plasma samples.
José Luis García‐Gimenez, Juan Carlos Ruiz‐Rodríguez, Ricard Ferrer, Raquel Durá, Antonio Artigas, Iván Bajaña, David Bolado López de Andujar, Irene Cánovas‐Cervera, Adrián Ceccato, Luis Chiscano‐Camón, Elena Climent‐Martinez, Georgia García Fernández, Gemma Goma, Verónica Monforte, Beatriz Quevedo‐Sánchez, Adolf Ruiz‐Sanmartín, Antonio Sierra‐Rivera, Nieves Carbonell Monleón   +17 more
wiley   +1 more source

Secondary star formation within massive star clusters: Origin of multiple stellar populations in globular clusters [PDF]

, 2004
We numerically investigate whether and how gaseous ejecta from AGB stars can be converted into new stars within originally massive star clusters (MSCs) in order to understand the origin of multiple stellar populations in globular clusters (GCs). We adopt
Bekki, Kenji
core   +3 more sources

The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods

The Astrophysical Journal
We present the discovery of two quadruple star systems—TIC 285853156 and TIC 392229331—each consisting of two bound eclipsing binary stars. Among the most compact quadruples known, TIC 392229331 and TIC 285853156 have the second and third shortest outer ...
Brian P. Powell, Guillermo Torres, Veselin B. Kostov, Tamás Borkovits, Saul A. Rappaport, Maxwell Moe, David W. Latham, Thomas L. Jacobs, Robert Gagliano, Martti H. K. Kristiansen, Mark Omohundro, Hans M. Schwengeler, Daryll M. LaCourse, Ivan A. Terentev, Allan R. Schmitt   +14 more
doaj   +1 more source

Five Massive Contact Binaries with Twin Components in LMC

The Astrophysical Journal, 2023
Massive contact binaries refer to the close binary systems in which the components have filled their respective Roche lobes and share a common envelope with early-type spectra.
Fu-Xing Li, Sheng-Bang Qian, Chu-Qi Wu, Min-Yu Li, Er-Gang Zhao, Wen-Ping Liao, Li-Ying Zhu, Qi-Bin Sun, Jia Zhang   +8 more
doaj   +1 more source

COMMISSION 26: DOUBLE AND MULTIPLE STARS [PDF]

Proceedings of the International Astronomical Union, 2008
The business meeting of Commission 26 was held on Friday, 7 August 2009, and consisted mainly of scientific talks. At the end, incoming President J. A. Docobo gave a video presentation with his thoughts regarding future activities of Commission 26, including the comments of members of the OC.
Docobo, José Angel, Mason, B.D., Allen, Christine, Arenou, Frédéric, Balega, Y., Oswalt, T., Pourbaix, Dimitri, Scardia, Marco, Scarfe, Colin D., Tamazian, V.S.   +9 more
openaire   +4 more sources

Mechanisms and kinetic assays of aminoacyl‐tRNA synthetases

FEBS Letters, EarlyView.
Accurate protein synthesis is crucial for life. The key players are aminoacyl‐tRNA synthetases (AARSs), which read the genetic code by pairing cognate amino acids and tRNAs. AARSs establish high amino acid selectivity by employing physicochemical limits in molecular recognition.
Igor Zivkovic, Morana Dulic, Ita Gruic‐Sovulj   +2 more
wiley   +1 more source

A catalogue of young runaway Hipparcos stars within 3kpc from the Sun

, 2010
Traditionally runaway stars are O and B type stars with large peculiar velocities.We want to extend this definition to young stars (up to ~50 Myr) of any spectral type and identify those present in the Hipparcos catalogue applying different selection ...
Abrahamyan, Aumer, Baraffe, Barbier-Brossat, Bekenstein, Bernasconi, Bertelli, Bertelli, Bertout, Blaauw, Blaha, Bobylev, Brown, Buscombe, Chauvin, Claret, Conlon, Cruz-González, Cutispoto, D'Antona, D'Antona, Dambis, De Medeiros, de Wit, de Zeeuw, Dehnen, Delhaye, Ducourant, Egret, Evans, Favata, Gaidos, Gaidos, Garmany, Gies, Gontcharov, Grenier, Haefner, Hawley, Hernández, Hohle, Hoogerwerf, Jeffries, Karatas, Kenyon, Kharchenko, Kharchenko, Kilkenny, Köhler, Lawson, Leonard, M. M. Hohle, Maeder, Makarov, Marques, Martin, Mdzinarishvili, Micela, Mihalas, Moffat, Moffat, Montes, N. Tetzlaff, Neuhäuser, Neuhäuser, Neuhäuser, Neuhäuser, Neuhäuser, Palla, Pedoussaut, Perryman, Philp, Pietrinferni, Pourbaix, Poveda, R. Neuhäuser, Reid, Schaller, Schmidt-Kaler, Siess, Smith, Soderblom, Song, Stone, Stone, Strassmeier, Tagliaferri, Teixeira, Tetzlaff, The, Torres, Uyanıker, Valenti, van den Ancker, van Leeuwen, Vitrichenko, Webb, White, Wichmann, Wright, Zacharias, Zuckerman, Zuckerman, Zwitter   +103 more
core   +1 more source