Results 1 to 10 of about 23,920,837 (347)

Active Matter [PDF]

open access: yesThe European Physical Journal E, 2013
The study of systems with sustained energy uptake and dissipation at the scale of the constituent particles is an area of central interest in nonequilibrium statistical physics. Identifying such systems as a distinct category -- Active Matter -- unifies our understanding of autonomous collective move- ment in the living world and in some surprising ...
Golestanian, R. ; https://orcid.org/0000-0002-3149-4002   +1 more
openaire   +5 more sources

Activating Membranes [PDF]

open access: yesPhysical Review Letters, 2014
We present a general dynamical theory of a membrane coupled to an actin cortex containing polymerizing filaments with active stresses and currents, and demonstrate that active membrane dynamics [Phys. Rev. Lett \textbf{84}, 3494 (2000)] and spontaneous shape oscillations emerge from this description. We also consider membrane instabilities and patterns
Maitra, Ananyo   +3 more
openaire   +3 more sources

Actively Seeking Activating Sequences [PDF]

open access: yesCell, 2004
I thank R. Brent, I. Cartwright, L. Keegan, Z. Liu, M. Ptashne, and M. Xu for comments. I apologize that the page limit did not permit citation of all relevant work. This work was supported in part by the AHA and the NSF.
openaire   +2 more sources

Charcoal Activation [PDF]

open access: yesProceedings of the National Academy of Sciences, 1919
LC copy replaced by microfilm. ; "Reprinted from the Physical review, n.s., vol. XVI, no. 3, September, 1920." ; Thesis (PH. D.)--University of Chicago, 1920. ; Mode of access: Internet.
openaire   +3 more sources

Active listening

open access: yesHearing Research, 2020
AbstractThis paper introduces active listening, as a unified framework for synthesising and recognising speech. The notion ofactive listeninginherits from active inference, which considers perception and action under one universal imperative: to maximise the evidence for our (generative) models of the world.
Friston, Karl J.   +5 more
openaire   +3 more sources

ACE2 ACTIVATION PROMOTES ANTITHROMBOTIC ACTIVITY

open access: yesThe FASEB Journal, 2009
Hyperactivity of the axis ACE/AngII/AT1R of the renin‐angiotensin system is associated with occurrence of acute thrombotic event. Recently a novel concept of a counterrugulatory axis, ACE2/Ang‐(1‐7)/Mas, has emerged. We hypothesized that ACE2 would be protective against thrombosis.
Rodrigo A, Fraga-Silva   +10 more
openaire   +2 more sources

Transcriptional activators and activation mechanisms [PDF]

open access: yesProtein & Cell, 2007
Transcriptional activators are required to turn on the expression of genes in a eukaryotic cell. Activators bound to the enhancer can facilitate either the recruitment of RNA polymerase II to the promoter or its elongation. This article examines a few selected issues in understanding activator functions and activation mechanisms.
openaire   +2 more sources

Active learning activities

open access: yesSeptentrio Conference Series, 2020
First year architecture students are introduced to the library by taking part in an “Escape Room” activity in the KTH library. The aim of this initiative is to introduce the students to the library space and the library's resources in an interactive and playful way and to enable them to learn and reflect upon their learning within the frame of an ...
Lenita Brodin Berggren, Ika Jorum
openaire   +3 more sources

Active colloidal molecules in activity gradients [PDF]

open access: yesPhysical Review E, 2022
We consider a rigid assembly of two active Brownian particles, forming an active colloidal dimer, in a gradient of activity. We show analytically that depending on the relative orientation of the two particles the active dimer accumulates in regions of either high or low activity, corresponding to, respectively, chemotaxis and antichemotaxis.
Hidde D. Vuijk   +4 more
openaire   +3 more sources

Chemistry and Biological Activities of Flavonoids: An Overview

open access: yesTheScientificWorldJournal, 2013
There has been increasing interest in the research on flavonoids from plant sources because of their versatile health benefits reported in various epidemiological studies. Since flavonoids are directly associated with human dietary ingredients and health,
Shashank Kumar, A. Pandey
semanticscholar   +1 more source

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