Wetting mechanism

Nassmahlen, n. wet grinding, wet milling, nassmechanisch, a. wet mechanical, wet-mill. Nass-metallurgie,/. hydrometallurgy. -mUhle,. f. wet mill, -probe, /. wet test. 

In places in which ground fog is undesirable, the dry-wet mechanical-draft cooling tower is the best solution. It will have its wet peaking tower out of service during the cooler months of the year, thereby substantially eliminating the fog problem and totally eliminating the icing problems of wet towers. 

E., (2000), Adsorption and wetting mechanisms at ceramic grain boundaries , Ceramic Transactions, 118, 427 -44. 

For all mineralized tissues, the environment in which they are tested can significantly affect their mechanical properties. For bone, tests in aqueous and in simulated physiological solutions can change the hardness and elastic modulus by 20% [16, 17]. For enamel and dentin, the difference between the dry and wet mechanical properties can be 10% [18, 19]. Earlier studies [9] found... 

Enhanced solubility of the low water-soluble drug may be obtained by bile salts through the wetting mechanism [36, 37]. This is the main mechanism when the bile salts are present at a level below their CMC [35, 38]. 

A cooling tower. This cycle also uses a multicell wet mechanical draft cooling tower. The water lost to evaporation and drift is replaced by steam condensate. 

In wet mechanical scrubbers, particularly inertia is used in the separation process and, to a lesser extent diffusion processes and the condensation effect. The separating areas are formed by a water curtain, water drops, a liquid surface or the surface of bubbles. During the separation involving water drops, their mass and diameter has to be much larger than those of the particles to be separated. The efficiency of the separator is governed by relation between the velocity of the droplets of the washing medium and that of the particles in the gas to be purified, and the time of contact between the liquid and gaseous phases. 

The wet mechanical scrubbers include simple shower, vortex, foam, inertial, stream and rotational separators. 

It has been shown [55] that it is possible to distinguish between the two adsorption regimes based upon the magnitude of the exponent (1/m). In particular, adsorption occurs according to the van der Waals mechanism if /m < 1/3, whereas it occurs by the capillary condensation (or capillary wetting) mechanism if 1/tm > 1/3. 

Zn-Al spinel was prepared via the wet mechanical mixing of ZnO powders with pseudoboehmlte. In some cases Sn02 powder was added to the mixed suspension. Mg-Al spinel was obtained via coprecipitation from the solutions of their nitrates. 

For the nanoparticle surfaces, a similar mixed wetting state as described above is assumed [11, 17]. Only on silica sphere arrays decorated by gold nanoparticles we observe CA > 150°, reduced hysteresis and SA < 5°, which are characteristic for superhydrophobic substrates. Although a detailed characterization of the wetting mechanism on these hierarchical surfaces lies outside the scope of this work, we assume that the droplets on the substrates with hierarchical roughness are neither in the Wenzel nor Cassie-Baxter state. Most likely they reside in a mixed state as presented by... 

Nanofibrillated fibres may also be used to make nonwovens using the wetlaid process. Fibrillation is the process of splitting fibres into fibrils or thin filaments, and is commonly conducted using wet mechanical beating to partially separate fibres into their component fibrils [16]. Nanofibrous cellulose has been produced from lyocell, cotton, and wood pulp, although the fibre diameter variation is high [17]. Fibril diameters between 0.05 and 0.5 pm have been observed, with an average of 0.3 pm, but a small number of microscale fibres (2—5 pm) are inevitable. 

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