Brownian ratchet
Mechanism proposed to explain protein translocation across membranes and force generation by polmerizing actin filaments. Relies upon asymmetry of cis and trans sides of the membrane or biased thermal motion as a result of polymerization. Still an hypothesis.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Brownian ratchet — The Brownian ratchet is a thought experiment about an apparent perpetual motion machine conceived by Richard Feynmancite book last = Feynman first = Richard P. authorlink = coauthors = title = The Feynman Lectures on Physics, Vol. 1 publisher =… …   Wikipedia

  • Brownian motor — Brownian motors are nano scale or molecular devices by which thermally activated processes (chemical reactions) are controlled and used to generate directed motion in space and to do mechanical or electrical work. These tiny engines operate in an …   Wikipedia

  • Brownian motion — This article is about the physical phenomenon; for the stochastic process, see Wiener process. For the sports team, see Brownian Motion (Ultimate). For the mobility model, see Random walk. Brownian motion (named after the botanist Robert Brown)… …   Wikipedia

  • Ratchet — A ratchet may refer to: * Ratchet (device), a mechanical device for controlling rotational motion * Socket wrench, a tool that makes use of the above mechanical device * A part of some forceps, to fix the blades of the forceps, such as in… …   Wikipedia

  • Molecular machine — Part of a series of articles on Molecular Nanotechnology …   Wikipedia

  • Perpetual motion — For other uses, see Perpetual motion (disambiguation). Robert Fludd s 1618 water screw perpetual motion machine from a 1660 wood engraving. This device is widely credited as the first recorded attempt to describe such a device in order to produce …   Wikipedia

  • J. M. R. Parrondo — Infobox Scientist box width = 300px name = J. M. R. Parrondo image size = 300px caption = Juan M. R. Parrondo, photographed in 2003 by Derek Abbott. birth date = Birth date and age|1964|1|9|mf=y birth place = Madrid, Spain death date = death… …   Wikipedia

  • Mouvement brownien — d une particule. Le mouvement brownien, ou processus de Wiener, est une description mathématique du mouvement aléatoire d une « grosse » particule immergée dans un fluide et qui n est soumise à aucune autre interaction que des chocs… …   Wikipédia en Français

  • Brownien — Mouvement brownien Mouvement brownien d une particule. Le mouvement brownien est une description mathématique du mouvement aléatoire d une « grosse » particule immergée dans un fluide et qui n est soumise à aucune autre interaction que… …   Wikipédia en Français

  • Bruit brownien — Mouvement brownien Mouvement brownien d une particule. Le mouvement brownien est une description mathématique du mouvement aléatoire d une « grosse » particule immergée dans un fluide et qui n est soumise à aucune autre interaction que… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”