Results 71 to 80 of about 1,938,271 (334)

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

Reconocimiento y desarrollo profesional docente: una experiencia con docentes que participan de programas de especialización para profesores de educación básica

open access: yesRIESED, 2015
En esta investigación se revisan las distintas propuestas de formación docente continua, y las posibles mejoras, aplicables al desarrollo profesional de los profesores en una sociedad de cambios educativos constantes.
José Miguel Olave Astorga   +1 more
doaj  

Reprocessing of Soft X-ray Emission Lines in Black Hole Accretion Disks

open access: yes, 2004
By means of a Monte Carlo code that accounts for Compton scattering and photoabsorption followed by recombination, we have investigated the radiation transfer of Ly alpha, He alpha, and recombination continua photons of H- and He-like C, N, O, and Ne ...
Benjamin F. Mathiesen   +7 more
core   +1 more source

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

Aperiodic invariant continua for surface homeomorphisms

open access: yes, 2008
We prove that if a homeomorphism of a closed orientable surface S has no wandering points and leaves invariant a compact, connected set K which contains no periodic points, then either K=S and S is a torus, or $K$ is the intersection of a decreasing ...
A. Dold   +11 more
core   +3 more sources

Weakly smooth continua [PDF]

open access: yesTransactions of the American Mathematical Society, 1975
We define and investigate a class of continua called weakly smooth. Smooth dendroids, weakly smooth dendroids, generalized trees, and smooth continua are all examples of weakly smooth continua. We generalize characterizations of the above mentioned examples to weakly smooth continua. In particular, we characterize them as compact Hausdorff spaces which
openaire   +2 more sources

Mechanisms of parasite‐mediated disruption of brain vessels

open access: yesFEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira   +3 more
wiley   +1 more source

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

open access: yesFEBS 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   +2 more
wiley   +1 more source

Enseñanza del concepto de densidad a través de un modelo analógico

open access: yesRevista de Enseñanza de la Física, 2010
A pesar de que algunos conceptos básicos e iniciales del currículo de ciencias, como masa, volumen y densidad, se enseñan en varios niveles educativos persisten dificultades en estudiantes que cursan el nivel terciario y el ...
Andrés Raviolo   +2 more
doaj  

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