Cytoplasmic convection currents and intracellular temperature gradients
نویسندگان
چکیده
منابع مشابه
Fluctuations of temperature gradients in turbulent thermal convection.
Broad theoretical arguments are proposed to show, formally, that the magnitude G of the temperature gradients in turbulent thermal convection at high Rayleigh numbers obeys the same advection-diffusion equation that governs the temperature fluctuation T , except that the velocity field in the new equation is substantially smoothed. This smoothed field leads to a -1 scaling of the spectrum of G ...
متن کاملTemperature gradients, and search for non-Boussinesq effects, in the interior of turbulent Rayleigh-Bénard convection
We report temperature measurements for a cylindrical sample of turbulent RayleighBénard convection (RBC) at points in the interior, well away from the thermal boundary layers near the top and bottom of the sample. The aspect ratio was equal to 1.00 and the Prandtl number σ was equal to 4.4 or 5.5. The data are in the range 5× 10 <R< 10, where R is the Rayleigh number. Measurements of the temper...
متن کاملThree-dimensional double-diffusive Marangoni convection in a cubic cavity with horizontal temperature and concentration gradients.
Three-dimensional double-diffusive Marangoni convection in a cubic cavity is studied in the present paper. Both the temperature and solute concentration gradients are applied horizontally. Direct numerical simulations are carried out for surface-tension Reynolds number 10≤Re≤500, surface-tension ratio -2≤R(σ)≤1, and Lewis number 1<Le≤200. Symmetry-breaking pitchfork bifurcation is observed, whi...
متن کاملConvection in rotating flows with simultaneous imposition of radial and vertical temperature gradients
Laboratory experiments were conducted to study heat transport characteristics in a nonhomogeneously heated fluid annulus subjected to rotation along the vertical axis (z). The nonhomogeneous heating was obtained by imposing radial and vertical temperature gradient (ΔT). The parameter range for this study was Rayleigh number, Ra=2.43×10-3.66×10, and Taylor number, Ta=6.45×10-27×10. The working f...
متن کاملIonic gradients, membrane potential and ionic currents
The neuronal plasma membrane delimits the whole neuron, cell body, dendrites, dendritic spines, axon and axon terminals. It is a barrier between the intracellular and extracellular environments. The general structure of the neuronal plasma membrane is similar to that of other plasma membranes. It is made up of proteins inserted in a lipid bilayer, forming as a whole a ‘fl uid mosaic’ ( Figure 3...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLOS Computational Biology
سال: 2019
ISSN: 1553-7358
DOI: 10.1371/journal.pcbi.1007372