Results 61 to 70 of about 695,293 (298)

Topological constraints on spiral wave dynamics in spherical geometries with inhomogeneous excitability [PDF]

open access: yes, 2004
We analyze the way topological constraints and inhomogeneity in the excitability influence the dynamics of spiral waves on spheres and punctured spheres of excitable media. We generalize the definition of an index such that it characterizes not only each
A. T. Winfree   +10 more
core   +1 more source

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

open access: yesFEBS 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

The Dynamical Relationship Between the Bar and Spiral Patterns of NGC 1365

open access: yes, 2016
Theories that attempt to explain the dynamical relationship between bar and spiral patterns in galactic disks make different predictions about the radial profile of the pattern speed.
Rooke, Paul C., Speights, Jason C.
core   +1 more source

Drift Laws for Spiral Waves on Curved Anisotropic Surfaces [PDF]

open access: yes, 2013
Rotating spiral waves organize spatial patterns in chemical, physical and biological excitable systems. Factors affecting their dynamics such as spatiotemporal drift are of great interest for par- ticular applications.
Brisard, Evelien   +3 more
core   +2 more sources

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

open access: yesFEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe   +3 more
wiley   +1 more source

Lists and narrative construction: Gesualdo Bufalino's challenge

open access: yesFinzioni
This essay studies Bufalino’s narrative work from the focal point of the theory and poetics of the list. In the five major novels – Diceria dell’untore, Argo il cieco ovvero i sogni della memoria, Le menzogne della notte, Qui pro quo and Tommaso e il ...
Maria Pia De Paulis
doaj   +1 more source

The role of histone modifications in transcription regulation upon DNA damage

open access: yesFEBS 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

Effect of Sextant Fixating Angle of Spiral Clavicle Plate on Biomechanical Stability—A Preliminary Finite Element Study

open access: yesBioengineering
Introduction: A spiral clavicle plate has been accepted for its superior multidirectional compatibility in the treatment of midshaft clavicle fractures from a biomechanical perspective.
Ming-Hsien Hu   +4 more
doaj   +1 more source

Dynamically Driven Evolution of the Interstellar Medium in M51

open access: yes, 2009
We report the highest-fidelity observations of the spiral galaxy M51 in CO emission, revealing the evolution of giant molecular clouds (GMCs) vis-a-vis the large-scale galactic structure and dynamics.
Aalto   +48 more
core   +1 more source

Angular Momentum across the Hubble sequence from the CALIFA survey [PDF]

open access: yes, 2014
We investigate the stellar angular momentum of galaxies across the Hubble sequence from the CALIFA survey. The distribution of CALIFA elliptical and lenticular galaxies in the $\lambda_{\rm Re}-\epsilon_{\rm e}$ diagram is consistent with that shown by ...
collaboration, the CALIFA   +3 more
core   +1 more source

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