Results 41 to 50 of about 18,407 (265)

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Exploring the History of Stellar Mergers with Chemistry: Examining the Origins of Massive α-enriched Stars Using Carbon Isotope Ratios

The Astrophysical Journal
Recently discovered massive α -enriched (MAE) stars have surface chemistry consistent with members of the older, thick-disk Milky Way population but high masses (∼1.5–3 M _⊙ ) that suggest these stars are young.
Zachary G. Maas, Keith Hawkins, Jeffrey M. Gerber, Zoe Hackshaw, Catherine Manea   +4 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

Machine Learning Detects Multiplicity of the First Stars in Stellar Archaeology Data

The Astrophysical Journal, 2023
In unveiling the nature of the first stars, the main astronomical clue is the elemental compositions of the second generation of stars, observed as extremely metal-poor (EMP) stars, in the Milky Way.
Tilman Hartwig, Miho N. Ishigaki, Chiaki Kobayashi, Nozomu Tominaga, Ken’ichi Nomoto   +4 more
doaj   +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

Nucleosynthesis in low-mass stars: Shedding light on the cosmic origin of heavy elements [PDF]

EPJ Web of Conferences
Low-mass, low-metallicity stars while evolving through the asymptotic giant branch (AGB) phase undergo significant nucleosynthesis producing the majority of slow (s-) and intermedite (i-) neutron capture elements.
Goswami Aruna
doaj   +1 more source

Soft motions encoded by the fold and mediated by conserved hinge sites drive V‐ATPase allosteric machinery and autoinhibition

FEBS Letters, EarlyView.
Vacuolar H+‐ATPase (V‐ATPase) is a multisubunit rotary proton pump that acidifies intracellular compartments. Using elastic network models, we identified conserved hinge residues that govern its large‐scale functional motions. We show that intrinsically encoded ‘soft modes’ drive critical functional transitions, including rotary catalysis and ...
Diksha Parwana, Xiaowei Bogetti, Stuti Sharma, Ivet Bahar   +3 more
wiley   +1 more source

MODEL ATMOSPHERES OF PECULAR CARBON GIANTS

Odessa Astronomical Publications, 2008
We calculated 240 model atmospheres of carbon giants of high carbon abundances (2800 ≤ Teff ≤ 3400 K, 0.06 ≤ log(C/O) ≤ 2.7). The set of models was calculated in process of analysis by spectral synthesis of spectral energy distribution of the evolved ...
Ya. V. Pavlenko, L. A. Yakovina
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Carbon Stars from Gaia Data Release 3 and the Space Density of Dwarf Carbon Stars

The Astrophysical Journal
Carbon stars (with atmospheric C/O > 1) range widely in temperature and luminosity, from low-mass dwarfs to asymptotic giant branch (AGB) stars. The main-sequence dwarf carbon (dC) stars have inherited carbon-rich material from an AGB companion, which ...
Benjamin R. Roulston, Naunet Leonhardes-Barboza, Paul J. Green, Evan Portnoi   +3 more
doaj   +1 more source