Results 91 to 100 of about 1,204,232 (364)

Physical mechanisms of mixing in stellar interiors [PDF]

Symposium - International Astronomical Union, 1984
The different mechanisms by which mixing can take place in stellar interiors are considered : the classical Rayleigh-Benard instability with penetrative convection and over-shooting, semi-convection, gravitationnal and radiative settling, turbulent mixing.
openaire   +1 more source

Physics of Compact Advanced Stellarators [PDF]

, 2001
Compact optimized stellarators offer novel solutions for confining high-beta plasmas and developing magnetic confinement fusion. The 3-D plasma shape can be designed to enhance the MHD stability without feedback or nearby conducting structures and provide drift-orbit confinement similar to tokamaks.
Zarnstorff, M. C., Berry, L. A., Brooks, A., Fredrickson, E., Fu, G. Y., Hirshman, S., Hudson, S., Ku, L. P., Lazarus, E., Mikkelsen, D., Monticello, D., Neilson, G. H., Pomphrey, N., Reiman, A., Spong, D., Strickler, D., Boozer, A., Cooper, W. A., Goldston, R., Hatcher, R., Isaev, M., Kessel, C., Lewandowski, J., Lyon, J., Merkel, P., Mynick, H., Nelson, B. E., Nuehrenberg, C., Redi, M., Reiersen, W., Rutherford, P., Sanchez, R., Schmidt, J., White, R. B.   +33 more
openaire   +2 more sources

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

FEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

A Core-sensitive Mixed f/g-mode of the Sun Predicted by Wave Topology and Hydrodynamical Simulation

The Astrophysical Journal Letters
Helioseismology has revolutionized our understanding of the Sun by analyzing its global oscillation modes. However, the solar core remains elusive, limiting a full understanding of its evolution.
Arthur Le Saux, Armand Leclerc, Guillaume Laibe, Pierre Delplace, Antoine Venaille   +4 more
doaj   +1 more source

Solar-Like Oscillators in the Kepler Era: A Review

Frontiers in Astronomy and Space Sciences, 2021
Many late-type stars across the Milky Way exhibit observable pulsations similar to our Sun that open up a window into stellar interiors. The NASA Kepler mission, a space-based photometric telescope, measured the micro-magnitude luminosity fluctuations ...
Jason Jackiewicz
doaj   +1 more source

Physics of Stellar Atmospheres [PDF]

Nature, 1956
Physik der Sternatmospharen, mit besonderer Berucksichtigung der Sonne Zweite Auflage. Von Prof. A. Unsold. Pp. ix + 866. (Berlin: Springer-Verlag, 1955.) 168 D.M.
openaire   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Spectral evidence from global geomagnetic calibration for stellar-system resonances constraining both quantum physics and geophysics [PDF]

, 2022
Mensur Omerbashich
openalex   +1 more source

The role of histone modifications in transcription regulation upon DNA damage

FEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

A Model for Eruptive Mass Loss in Massive Stars

The Astrophysical Journal
Eruptive mass loss in massive stars is known to occur, but the mechanism(s) are not yet well understood. One proposed physical explanation appeals to opacity-driven super-Eddington luminosities in stellar envelopes.
Shelley J. Cheng, Jared A. Goldberg, Matteo Cantiello, Evan B. Bauer, Mathieu Renzo, Charlie Conroy   +5 more
doaj   +1 more source