The actin cortex as an active wetting layer
نویسندگان
چکیده
منابع مشابه
The actin cortex as an active wetting layer.
Using active gel theory we study theoretically the properties of the cortical actin layer of animal cells. The cortical layer is described as a non-equilibrium wetting film on the cell membrane. The actin density is approximately constant in the layer and jumps to zero at its edge. The layer thickness is determined by the ratio of the polymerization velocity and the depolymerization rate of actin.
متن کاملPretransitional thinning of a polymer wetting layer
– Mixtures of two immiscible polymers A and B phase-separate into A-rich (α) and B-rich (β) phases. Thin films of such mixtures exhibit a transition from an equilibrium 3-layer structure (substrate/α/β/α/air) to a 2-layer structure (substrate/β/α/air) as the surface energy of the substrate is increased. In this letter we show that as an (equilibrium) precursor to this transition, the thickness ...
متن کاملTemperature-driven motion of a wetting layer.
The wetting layer formed by a phase-separated binary liquid mixture in contact with a glass substrate is observed to have a large nonequilibrium response in thickness to small temperature perturbations. An independent theoretical and physical picture is developed, which also provides a direct means of measuring the forces responsible for wetting and their effect on the dynamics of diffusion-lim...
متن کاملPost Voiding Wetting as an Unusual Presentation Symptom of Ectopic Ureter (Case Report)
The single ectopic ureter is relatively uncommon and most often is manifested by symptoms. A case of ectopic urethral ureter in a 11 year old girl is reported with post void wetting and incontinent dribbling but continent in other positions. IVU (intravenous excretory urography) showed compensatory hypertrophy of right kidney and nonvisualized left kidney. Cystoscopy demonstrated a left uretera...
متن کاملBistability in the actin cortex
Multi-color fluorescence imaging experiments of wave forming Dictyostelium cells have revealed that actin waves separate two domains of the cell cortex that differ in their actin structure and phosphoinositide composition. We propose a bistable model of actin dynamics to account for these experimental observation. The model is based on the simplifying assumption that the actin cytoskeleton is c...
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: The European Physical Journal E
سال: 2013
ISSN: 1292-8941,1292-895X
DOI: 10.1140/epje/i2013-13052-9