Results 81 to 90 of about 11,541,392 (252)

The Stellar Initial Mass Function of Early Dark Matter–free Gas Objects

The Astrophysical Journal Letters
Among the remarkable strides made by JWST is the discovery of the earliest star clusters found to date. These have been proposed as early progenitors of globular clusters, which are known to come from the early stages of star formation in the Universe ...
William Lake, Michael Y. Grudić, Smadar Naoz, Naoki Yoshida, Claire E. Williams, Blakesley Burkhart, Federico Marinacci, Mark Vogelsberger, Avi Chen   +8 more
doaj   +1 more source

The heterodimeric amino acid transporters (HAT) of the SLC7/SLC3 family: A structure−function relationships and relevance to human pathology

FEBS Letters, EarlyView.
Heterodimeric amino acid transporters consist of SLC7 and SLC3 family proteins arranged in a conserved structural organization. They regulate nutrient transport across cell membranes, supporting essential cellular functions. These transporters also contribute to xenobiotic/drug uptake and distribution.
Mariafrancesca Scalise, Tiziano Mazza, Raffaella Scanga, Lara Console, Michele Galluccio, Cesare Indiveri   +5 more
wiley   +1 more source

Direct Evidence for Stellar Initial Mass Function Variation in the Milky Way

The Astrophysical Journal Letters
Because direct measurements require resolved stellar populations, including low-mass stars, determining the stellar initial mass function (IMF) has been a historically difficult problem even within our own Galaxy, and impossible everywhere else.
Charles L. Steinhardt, Carter Meyerhoff, Alexander J. Luening   +2 more
doaj   +1 more source

Metastatic niche shaped by host factors influences disseminated cancer cell fate

FEBS Letters, EarlyView.
Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward, Álvaro Ruiz‐Tabas, Patricia Altea‐Manzano   +2 more
wiley   +1 more source

Smaller is better: nanobodies meet NMR

FEBS Letters, EarlyView.
Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley   +1 more source

Gauging the Impact of Cosmic-ray Feedback on the Stellar Initial Mass Function

The Astrophysical Journal
Cosmic rays (CRs) drive ionization and influence gas dynamics in molecular clouds (MCs), potentially impacting the resulting star formation outcomes. Although previous simulations of individual star formation have included methods for CR transport (CRT),
Margot Fitz Axen, Stella Offner, Philip F. Hopkins, Michael Y. Grudić   +3 more
doaj   +1 more source

Invisible but not inaccessible—Revealing transient oligomers formed by intrinsically disordered proteins with solution NMR and complementary methods

FEBS Letters, EarlyView.
Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley   +1 more source

Impact of Initial Mass Function on the Chemical Evolution of High-redshift Galaxies

The Astrophysical Journal
Recent observations by the James Webb Space Telescope (JWST) have found evidence for an invariant relation between stellar mass, metallicity, and star formation rate up to z  ∼ 8 and its breakdown at higher redshifts. Understanding the underlying physics
Boyuan Liu, Michela Mapelli, Volker Bromm, Ralf S. Klessen, Lumen Boco, Tilman Hartwig, Simon C. O. Glover, Veronika Lipatova, Guglielmo Costa, Marco Dall’Amico, Giuliano Iorio, Kendall Shepherd, Alessandro Bressan   +12 more
doaj   +1 more source

Membrane composition and thermodynamic identity as boundaries of life for synthetic cell research

FEBS Letters, EarlyView.
What makes a cell a cell? The boundary of a living cell is not just a wall. Read as a Markov blanket, the membrane separates internal from external states, generating identity and non‐equilibrium order. Can this identity be rebuilt from scratch in a synthetic cell?
Caterina Presutti, Bert Poolman
wiley   +1 more source

Planet Mass Function around M Stars at 1–10 au: A Plethora of Sub-Earth Mass Objects

The Astrophysical Journal
Small planets (≲1 M _⊕ ) at intermediate orbital distances (∼1 au) represent an uncharted territory in exoplanetary science. The upcoming microlensing survey by the Nancy Grace Roman Space Telescope will be sensitive to objects as light as Ganymede and ...
Yayaati Chachan, Eve J. Lee
doaj   +1 more source