Results 121 to 130 of about 8,281,459 (308)

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Semiempirical versus Theoretical Stellar Population Models: A Comparison with Star Clusters

The Astronomical Journal
Stellar population synthesis (SPS) models are a key tool for deriving the age, metallicity, radial velocity, and reddening of star clusters from their integrated spectra.
Randa Asa’d, Paula R. T. Coelho, Johina M. John, Igor V. Chilingarian, Gustavo Bruzual, Stephane Charlot   +5 more
doaj   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Old-Aged Stellar Population Distance Indicators [PDF]

, 2018
Rachael L. Beaton, Giuseppe Bono, V. F. Braga, M. Dall’Ora, G. Fiorentino, In Sung Jang, C. E. Martínez-Vázquez, Noriyuki Matsunaga, M. Monelli, J. Neeley, M. Salaris   +10 more
openalex   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

Model Choice Matters for Age Inference on the Red Giant Branch

The Astrophysical Journal
Galactic archaeology relies on accurate stellar parameters to reconstruct the Galaxy's history, including information on stellar ages. While the precision of data has improved significantly in recent years, stellar models used for age inference have not ...
Leslie M. Morales, Jamie Tayar, Zachary R. Claytor   +2 more
doaj   +1 more source

The Vertical Age Distribution of Stellar Disk Populations in Edge-on Galaxies [PDF]

, 1995
A. Just, B. Fuchs, R. Wielen
openalex   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

A Galactic Interloper: A Study of the Camelopardis OB1 Association’s Clusters and Its Visitor from the Perseus Arm

The Astrophysical Journal
Within the molecular clouds of the Camelopardis OB1 (Cam OB1) association exists a region previously noted as one subgroup. However, bulk clustering from Gaia astrometry has recently shown three distinctive kinematically coherent groups, all found in a ...
Joseph Mullen, Amanda Mast, Marina Kounkel, Keivan Stassun, Alexandre Roman-Lopes, Jonathan C. Tan   +5 more
doaj   +1 more source

Use of Redshifts as Evidence of Dark Energy

Physics
The large-scale dynamics of the universe is generally described in terms of the time-dependent scale factor a(t). To make contact with observational data, the a(t) function needs to be related to the observable z(r) function, redshift versus distance ...
Jan Stenflo
doaj   +1 more source