Results 51 to 60 of about 235,239 (268)

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

Synchronization with partial state coupling on SO(n) [PDF]

, 2010
This paper studies autonomous synchronization of k agents whose states evolve on SO(n), but which are only coupled through the action of their states on one "reference vector" in Rn for each link.
Lageman, Christian, Sarlette, Alain
core  

Disordered but rhythmic—the role of intrinsic protein disorder in eukaryotic circadian timing

FEBS Letters, EarlyView.
Unstructured domains known as intrinsically disordered regions (IDRs) are present in nearly every part of the eukaryotic core circadian oscillator. IDRs enable many diverse inter‐ and intramolecular interactions that support clock function. IDR conformations are highly tunable by post‐translational modifications and environmental conditions, which ...
Emery T. Usher, Jacqueline F. Pelham
wiley   +1 more source

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

Fixed/Preassigned-Time Synchronization of Fully Quaternion-Valued Cohen–Grossberg Neural Networks with Generalized Time Delay

Mathematics, 2023
This article is concerned with fixed-time synchronization and preassigned-time synchronization of Cohen–Grossberg quaternion-valued neural networks with discontinuous activation functions and generalized time-varying delays.
Shichao Jia, Cheng Hu, Haijun Jiang
doaj   +1 more source

Associative memory storing an extensive number of patterns based on a network of oscillators with distributed natural frequencies in the presence of external white noise

, 2001
We study associative memory based on temporal coding in which successful retrieval is realized as an entrainment in a network of simple phase oscillators with distributed natural frequencies under the influence of white noise.
A. Arenas, A. C. C. Coolen, A. L. Hodgkin, A. R. Damasio, A. Treves, A. Treves, A. V. M. Herz, C. C. Chow, C. M. Gray, C. van Vreeswijk, C. von der Malsburg, C. von der Malsburg, D. Hansel, D. J. Amit, D. J. Thouless, D. O. Hebb, D. Terman, E. Gardner, F. R. Waugh, H. Daido, H. Sakaguchi, J. Cook, J. J. Hopfield, J. Nagumo, K. Nakanishi, K. Park, L. F. Cugliandolo, L. F. Cugliandolo, M. Gabbay, M. Griniasty, M. Mezard, M. Shiino, M. Shiino, M. Shiino, M. Yoshioka, M. Yoshioka, M. Yoshioka, Masahiko Yoshioka, Masatoshi Shiino, P. C. Bressloff, P. C. Bressloff, P. M. Milner, P. Peretto, R. Eckhorn, R. FitzHugh, R. Kühn, R. Kühn, S. Kirkpatrick, T. Aonishi, T. Aoyagi, T. Fukai, T. Plefka, U. Ernst, W. Gerstner, W. Gerstner, W. Mass, X. J. Wang, Y. Kuramoto   +57 more
core   +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

β‐TrCP overexpression enhances cisplatin sensitivity by depleting BRCA1

Molecular Oncology, EarlyView.
Low levels of β‐TrCP (Panel A) allow the accumulation of BRCA1 and CtIP, which facilitate the repair of cisplatin‐induced DNA damage via homologous recombination (HR) and promote tumor cell survival. In contrast, high β‐TrCP expression (Panel B) leads to BRCA1 and CtIP degradation, impairing HR repair, resulting in persistent DNA damage and apoptosis ...
Rocío Jiménez‐Guerrero, Alejandro Belmonte‐Fernández, Mónica González‐Moreno, Laura Rodríguez‐Cordero, Begoña Pérez‐Valderrama, Joaquín Herrero‐Ruíz, Francisco Romero, Carmen Sáez, Miguel Á. Japón   +8 more
wiley   +1 more source

Fixed-time synchronization of quaternion-valued BAM neural networks

Nantong Daxue xuebao. Ziran kexue ban, 2023
The bidirectional associative memory(BAM) neural networks is extended to the quaternion domain and a new type of quaternion-valued bidirectional associative memory neural networks(QVBAMNNs) is proposed.
SHI Yuchen; WEI Ruoyu
doaj   +1 more source

Synchronization vs. decoherence of neutrino oscillations at intermediate densities

, 2010
We study collective oscillations of a two-flavor neutrino system with arbitrary but fixed density. In the vacuum limit, modes with different energies quickly de-phase (kinematical decoherence), whereas in the limit of infinite density they lock to each ...
Raffelt, Georg G., Tamborra, Irene
core   +1 more source