Results 71 to 80 of about 440,001 (300)

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

The Value-added Catalog of OB Stars in LAMOST DR7

The Astrophysical Journal Supplement Series
In this work, we update the catalog of OB stars based on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope data release 7 and modify the OB stars’ selection criteria in spectral line indices’ space.
Zhicun Liu, Wenyuan Cui, Jiajia Gu, Jianrong Shi, Guozhen Hu, Xiao-Long Wang, Zhenyan Huo   +6 more
doaj   +1 more source

Abundance analysis of two late A-type stars HD 32115 and HD 37594 [PDF]

, 2002
We have performed abundance analysis of two slowly rotating, late A-type stars, HD 32115 (HR 1613) and HD 37594 (HR 1940), based on obtained echelle spectra covering the spectral range 4000-9850 AAngstrom.
Abt, Adelman, Adelman, Barklem, Baumüller, Belyakova, Belyakova, Biémont, Bord, Bruntt, Cowley, Cowley, Dimitrijevic, E. V. Belyakova, F. A. Musaev, Froese Fischer, Fuhrmann, G. Galazutdinov, Gardiner, Grenier, Grevesse, Gustafsson, H. Bruntt, Hauck, Hibbert, Hibbert, Holweger, Holweger, I. F. Bikmaev, Ivanova, Ivanova, Jonsson, Konjevic, Kupka, L. I. Mashonkina, Lawler, Lawler, Luck, Luck, Mashonkina, Mashonkina, Mashonkina, Moon, Napiwotzki, Nave, Nordström, P. S. Barklem, Pamyatnykh, Paunzen, Piskunov, Raassen, Rentzsch-Holm, Schnabel, Smalley, Smalley, Stehlé, Sturenburg, T. A. Ryabchikova, Takeda, Takeda, Turcotte, V. V. Shimansky, Valenti, Varenne, Zhang, Zhao   +65 more
core   +1 more source

Phosphatidylinositol 4‐kinase as a target of pathogens—friend or foe?

FEBS Letters, EarlyView.
This graphical summary illustrates the roles of phosphatidylinositol 4‐kinases (PI4Ks). PI4Ks regulate key cellular processes and can be hijacked by pathogens, such as viruses, bacteria and parasites, to support their intracellular replication. Their dual role as essential host enzymes and pathogen cofactors makes them promising drug targets.
Ana C. Mendes, Guilherme M. Azevedo, Amanda P. Barcellos, Diana Bahia   +3 more
wiley   +1 more source

Molybdenum and ruthenium in the Galactic disk: A closer look at their nucleosynthesis components

Astronomy & Astrophysics
Context. The stellar origin of the elements molybdenum (Mo, Z = 42) and ruthenium (Ru, Z = 44) is still a matter of debate. Studying their abundances provides valuable insights into nucleosynthesis processes and the broader evolution of neutron-capture ...
Mishenina T., Kurtukian-Nieto T., Gorbaneva T., Amarsi A. M., Psaltis A., Pignatari M.   +5 more
doaj   +1 more source

EDEN Survey: Small Transiting Planet Detection Limits and Constraints on the Occurrence Rates of Planets around Late-M Dwarfs within 15 pc

The Astronomical Journal, 2023
Earth-sized exoplanets that transit nearby, late-spectral-type red dwarfs will be prime targets for atmospheric characterization in the coming decade.
Jeremy Dietrich, Dániel Apai, Martin Schlecker, Kevin K. Hardegree-Ullman, Benjamin V. Rackham, Nicolas Kurtovic, Karan Molaverdikhani, Paul Gabor, Thomas Henning, Wen-Ping Chen, Luigi Mancini, Alex Bixel, Aidan Gibbs, Richard P. Boyle, Samantha Brown-Sevilla, Remo Burn, Timmy N. Delage, Lizxandra Flores-Rivera, Riccardo Franceschi, Gabriele Pichierri, Sofia Savvidou, Jonas Syed, Ivan Bruni, Wing-Huen Ip, Chow-Choong Ngeow, An-Li Tsai, Chia-Lung Lin, Wei-Jie Hou, Hsiang-Yao Hsiao, Chi-Sheng Lin, Hung-Chin Lin, Ritvik Basant, Project EDEN   +32 more
doaj   +1 more source

HAZMAT III: The UV Evolution of Mid- to Late-M Stars with GALEX

, 2018
Low-mass stars are currently the most promising targets for detecting and characterizing habitable planets in the solar neighborhood. However, the ultraviolet (UV) radiation emitted by such stars can erode and modify planetary atmospheres over time ...
Schneider, Adam C., Shkolnik, Evgenya L.
core   +1 more source

Star Formation History of a Young Super-Star Cluster in NGC 4038/39: Direct Detection of Low Mass Pre-Main Sequence Stars [PDF]

, 2010
We present an analysis of the near-infrared spectrum of a young massive star cluster in the overlap region of the interacting galaxies NGC 4038/39 using population synthesis models.
Blum, Brandl, Christopher, Covey, Doppmann, Gilbert, Gorlova, Grebel, Indebetouw, Julia Greissl, Larsen, Leitherer, Leitherer, Levesque, Massey, McCrady, Melo, Mengel, Meyer, Meyer, Meyer, Michael R. Meyer, Micol H. Christopher, Mirabel, Neff, Nick Z. Scoville, Siess, Snijders, Steidel, Tremonti, Vazquez, Wallace, Wang, Whitmore, Whitmore   +34 more
core   +2 more sources

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

The SN 2023ixf Progenitor in M101. II. Properties

The Astrophysical Journal
We follow our first paper with an analysis of the ensemble of the extensive preexplosion ground- and space-based infrared observations of the red supergiant (RSG) progenitor candidate for the nearby core-collapse supernova SN 2023ixf in Messier 101 ...
Schuyler D. Van Dyk, Sundar Srinivasan, Jennifer E. Andrews, Monika Soraisam, Tamás Szalai, Steve B. Howell, Howard Isaacson, Thomas Matheson, Erik Petigura, Peter Scicluna, Andrew W. Stephens, Judah Van Zandt, WeiKang Zheng, Sang-Hyun Chun, Alexei V. Fillippenko   +14 more
doaj   +1 more source