نتایج جستجو برای: rough or smooth surface aerosol flow
تعداد نتایج: 4420489 فیلتر نتایج به سال:
Samples of sugar, starch, spices, and miscellaneous products were tested for thermophilic sporeformers of Bacillus to determine the dominant species present. Surface colonies selected at random were identified. Six species of Bacillus were isolated: B. stearothermophilus, B. coagulans, B. licheniformis, B. subtilis, B. circulans, and B. pumilus. Samples of starch and pepper were tested for ther...
A sudden decrease in water depth, called a negative surge or expansion wave, is characterised by a gentle change in free-surface elevation. Some geophysical applications include the ebb tide flow in macro-tidal estuaries, the rundown of swash waters and the retreating waters after maximum tsunami runup in a river channel. The upstream propagation of expansion waves against an initially steady f...
The effect of the surface roughness of solid atmospheric aerosol particles on their heterogeneous nucleation capability has been examined using the concept of Aself-affineB rough surfaces. The surface roughness has a great influence on the contact angle between the particle surface and the nucleating liquid droplets. Roughness enhances wetting and the rate of heterogeneous nucleation from the v...
Burkholderia pseudomallei (Bp), the agent of melioidosis, causes disease ranging from acute and rapidly fatal to protracted and chronic. Bp is highly infectious by aerosol, can cause severe disease with nonspecific symptoms, and is naturally resistant to multiple antibiotics. However, no vaccine exists. Unlike many Bp strains, which exhibit random variability in traits such as colony morphology...
Wang, Z., Coburn, C. A., Ren, X. and Teillet, P. M. 2012. Effect of soil surface roughness and scene components on soil surface BRF. Can. J. Soil Sci. 92: 297 313. Bidirectional Reflectance factor (BRF) data of both rough [surface roughness index (SRI) of 51%] and smooth soil surfaces (SRI of 5%) were acquired in the laboratory under 308 illumination zenith angle using a Specim V10E imaging spe...
Direct Numerical Simulation of a Turbulent Boundary Layer Encountering a Smooth-to-Rough Step Change
Using a direct numerical simulation (DNS), we investigate the onset of non-equilibrium effects and subsequent emergence self-preserving state as turbulent boundary layer (TBL) encounters smooth-to-rough (STR) step change. The rough surface comprises over 2500 staggered cuboid-shaped elements where first row is placed at 50 θ0 from inflow. A Reθ=4500 value attained along with δk≈35 TBL develops....
A simple method for modifying a polymer surface to induce lipid bilayer formation by vesicle fusion is described. A silicate gel was prepared by condensation of tetraethyl orthosilicate (TEOS) in the presence of acid. When applied to a poly(methylmethacrylate) substrate, either a rough or a smooth layer could be produced, depending on the method used for the application. The smooth surface indu...
The drag coefficient is essential for calculating the aerodynamic friction between air and sea. In this study, we regress a set of relationships wind speed different ranges using an observational dataset that consists 5941 estimates mean flow fluxes from 11 aircraft turbulent measurements over sea surface. Results show that: (1) power function smooth surface when it no greater than 4.5 ms?1, de...
PURPOSE To determine the role of smooth or rough lipopolysaccharide on adherence of Pseudomonas aeruginosa bacteria to the rat cornea in vitro and on contact lenses of differing types. METHODS Adherence of a smooth (AK957) and isogenic rough strain (AK1012) of P. aeruginosa bacteria to rat corneas that were either normal, traumatized using a 20-gauge needle or treated for 15 min with 0.1N sod...
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