Bacterial transport suppressed by fluid shear
نویسندگان
چکیده
منابع مشابه
Onset of sediment transport is a continuous transition driven by fluid shear and granular creep
Fluid-sheared granular transport sculpts landscapes and undermines infrastructure, yet predicting the onset of sediment transport remains notoriously unreliable. For almost a century, this onset has been treated as a discontinuous transition at which hydrodynamic forces overcome gravity-loaded grain-grain friction. Using a custom laminar-shear flume to image slow granular dynamics deep into the...
متن کاملFluid shear influences on flocculation Fluid shear influences on flocculation
The tube flocculator is used to study how fluid shear levels affect the settling properties of a flocculated alum-kaolin suspension. FReTA is employed to quantitatively compare the effects of varying fluid shear and hydraulic residence time on the sedimentation velocity distributions and the post-sedimentation residual turbidities of flocculated suspensions formed in the tube flocculator. Resul...
متن کاملFluid transport by gallbladder epithelium.
The absorption of fluid by epithelial tissues is thought to be due to the existence of hypertonic regions within the epithelium. The magnitude of the required hypertonicity as well as its localization have been the subject of considerable experimental and theoretical effort. Model calculations demonstrated the need for knowledge of the water permeability of the membranes of epithelial cells for...
متن کاملTransport powered by bacterial turbulence.
We demonstrate that collective turbulentlike motion in a bacterial bath can power and steer the directed transport of mesoscopic carriers through the suspension. In our experiments and simulations, a microwedgelike "bulldozer" draws energy from a bacterial bath of varied density. We obtain that an optimal transport speed is achieved in the turbulent state of the bacterial suspension. This appar...
متن کاملCEREBROSPINAL FLUID FINDINGS IN NEONATAL BACTERIAL MENINGITIS
Background : Meningitis is more common during the neonatal period than other periods of life and has a prevalence of one in 1000 live births. The similarity of its clinical manifestations with other infectious diseases makes it difficult to diagnose. The aim of the current study was to determine the relationship between age, sex, clinical signs and symptoms and laboratory test results of ne...
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: Nature Physics
سال: 2014
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys2883