Results 91 to 100 of about 4,372,191 (364)

Single‐cell insights into the role of T cells in B‐cell malignancies

FEBS Letters, EarlyView.
Single‐cell technologies have transformed our understanding of T cell–tumor cell interactions in B‐cell malignancies, revealing new T‐cell subsets, functional states, and immune evasion mechanisms. This Review synthesizes these findings, highlighting the roles of T cells in pathogenesis, progression, and therapy response, and underscoring their ...
Laura Llaó‐Cid
wiley   +1 more source

Hydro-chemical study of the evolution of interstellar pre-biotic molecules during the collapse of molecular clouds

, 2012
One of the stumbling blocks for studying the evolution of interstellar molecules is the lack of adequate knowledge of the rate co-efficients of various reactions which take place in the Interstellar medium and molecular clouds.
Ankan Das, Boogert, Chakrabarti, Chakrabarti, Chakrabarti, Cuppen, Das, Fuente, Gibb, Guelin, Ioppolo, Kuan, Liton Majumdar, Sandip K. Chakrabarti, Snyder, Sonali Chakrabarti, Woon   +16 more
core   +1 more source

Planetary nebulae in the inner Milky Way [PDF]

, 2009
New abundances of planetary nebulae located towards the bulge of the Galaxy are derived based on observations made at LNA (Brazil). We present accurate abundances of the elements He, N, S, O, Ar, and Ne for 56 PNe located towards the galactic bulge.
Chiappini, Costa, Cuisinier, Escudero, Oscar Cavichia, Roberto D. D. Costa, Smartt, Walter J. Maciel   +7 more
core   +1 more source

The Missing Link of Sulfur Chemistry in TMC-1: The Detection of c-C3H2S from the GOTHAM Survey

The Astrophysical Journal
We present the spectroscopic characterization of cyclopropenethione in the laboratory and detect it in space using the Green Bank Telescope Observations of TMC-1: Hunting Aromatic Molecules survey.
Anthony J. Remijan, P. Bryan Changala, Ci Xue, Elsa Q. H. Yuan, Miya Duffy, Haley N. Scolati, Christopher N. Shingledecker, Thomas H. Speak, Ilsa R. Cooke, Ryan Loomis, Andrew M. Burkhardt, Zachary T. P. Fried, Gabi Wenzel, Andrew Lipnicky, Michael C. McCarthy, Brett A. McGuire   +15 more
doaj   +1 more source

Recent Advances in Understanding R-Process Nucleosynthesis in Metal-Poor Stars and Stellar Systems

Universe
The rapid neutron-capture process (r-process) is responsible for the creation of roughly half of the elements heavier than iron, including precious metals like silver, gold, and platinum, as well as radioactive elements such as thorium and uranium ...
Avrajit Bandyopadhyay, Timothy C. Beers
doaj   +1 more source

High-precision chemical abundances of Galactic building blocks

Astronomy & Astrophysics, 2022
Context. Sequoia is a retrograde kinematic substructure in the nearby Galactic halo, whose properties are a matter of debate. For example, previous studies do not necessarily agree on the chemical abundances of Sequoia stars, which are important for understanding its nature. Aims.
Matsuno, Tadafumi, Koppelman, Helmer H., Helmi, Amina, Aoki, Wako, Ishigaki, Miho N., Suda, Takuma, Yuan, Zhen, Hattori, Kohei   +7 more
openaire   +3 more sources

Properties of six short-period massive binaries: a study of the effects of binarity on surface chemical abundances [PDF]

, 2017
A significant fraction of massive stars are found in multiple systems. The effect of binarity on stellar evolution is poorly constrained. In particular, the role of tides and mass transfer on surface chemical abundances is not constrained observationally.
F. Martins, L. Mahy, Anthony Herv'e Lupm, CNRSMontpellier University, S. Sciences, Technologies, A. R. Institute, L. University, Instituut voor Sterrenkunde, K. Leuven   +9 more
semanticscholar   +1 more source

Cyclic nucleotide signaling as a drug target in retinitis pigmentosa

FEBS Letters, EarlyView.
Disruptions in cGMP and cAMP signaling can contribute to retinal dysfunction and photoreceptor loss in retinitis pigmentosa. This perspective examines the mechanisms and evaluates emerging evidence on targeting these pathways as a potential therapeutic strategy to slow or prevent retinal degeneration.
Katri Vainionpää, Ahmed B. Montaser, Henri Leinonen   +2 more
wiley   +1 more source

Excitation and abundance study of CO+ in the interstellar medium

, 2009
Observations of CO+ suggest column densities on the order 10^12 cm^-2 that can not be reproduced by many chemical models. CO+ is more likely to be destroyed than excited in collisions with hydrogen.
Andersson, Black, Cheng, Dickinson, Dubernet, Faure, Ferland, Flower, Fuente, Fuente, Fuente, Fuente, Hogerheijde, Jansen, Latter, Meixner, P. Stäuber, Park, Pellegrini, Pickett, Rizzo, Röllig, S. Bruderer, Savage, Schöier, Spaans, Sternberg, Stoerzer, Stäuber, Stäuber, Stäuber, Stäuber, Troe, van der Tak, Woodall   +34 more
core   +2 more sources

The ¹⁷O/¹⁸O Ratio of Post-AGB Sources: Canonical and Non-Canonical Populations

Galaxies
Stellar evolution models serve as tools to derive stellar parameters from elemental and isotopic abundance ratios. For low-to-intermediate mass evolved stars, C/O, 12C/13C, and 17O/18O ratios are proxies of the initial mass, a largely unknown parameter ...
Javier Alcolea, Elisa Masa, Theo Khouri, Miguel Santander-García, Iván Gallardo Cava, Hans Olofsson, Carmen Sánchez Contreras, Valentín Bujarrabal, Wouter H. T. Vlemmings, Daniel Tafoya   +9 more
doaj   +1 more source