Capture area

Exposed area The particle capture area of a filter medium free from obstructions, through which a gas flows. 

A traditional approach to aquifer remediation is to remove the contaminated water by pumping, treating the water at the surface, and then either discharging it or reinjecting it back into the aquifer. When the recovery wells are properly located, this approach has the advantage of creating a capture area which contains and prevents the contamination from migrating. 

Finally, the molecular absorption cross-section absorption coefficient divided by the number N of molecular entities contained in a unit volume of the absorbing medium along the light path ... 

Derivation of the Beer-Lambert Law from considerations at a molecular scale is more interesting than the classical derivation (stating that the fraction of light absorbed by a thin layer of the solution is proportional to the number of absorbing molecules). Each molecule has an associated photon-capture area, called the molecular absorption cross-section a, that depends on the wavelength. A thin layer of thickness dl contains dN molecules. dN is given by... 

The key process design variable for gravity settlers is the capture area. A, which is given by... 

Recall, that dS is the sum of the capture areas for particles within the section it must therefore be proportional to the number of particles, or... 

Spot size (pm) Captured Area (pm ) Pulses Captured Area/ Pulses (pm /pulse)... 

Average Captured Area/Pulse for a 15.1 pm spot size = 219.022 pm /pulse Average Captured Area/Pulse for a 30.1 pm spot size = 903.866 pm /pulse... 

Adhesion-based strategies make use of the protein markers expressed by cells in order to immobilize them to specific points within microfluidic devices. This has been identified as a robust and reliable method for POC applications. Typically an antibody with (specific) affinity for the protein marker of interest (e.g., CD4 in HIV diagnostics or EpCAM in CTC testing) is immobilized on the surface of a microfluidic device (Fig. 1). The capture area can be defined in various shapes, patterns, and locations, e.g., to optimize binding and/or detection. This approach was used by Nagrath et al. [3] to isolate CTCs using a microfluidic chip which consisted of an array of 78,000 microposts which were coated with anti-EpCAM antibodies. The posts increased the inner surface area of the chip and thus enhanced the efficiency of CTC capture. Up to 5.1 ml of whole blood, acquired from 116 patients with... 

Microfluidic Cell Enumeration for Biomedical Diagnostics, Fig. 1 Affinity-based capture of target cells. The surface of the capture area is functionalized with antibodies specific to epitopes displayed on the outer membrane of the target cells. When a sample is pumped... 

Microfluidic Cell Enumeration for Biomedical Diagnostics, Fig. 5 (a) Cell capturing and distribution via a centrifugal V-cup array. Cells move in the radial direction from the center of rotation of the disk (Fc). V-cups are positioned in the capture area and are sized specifically that only a single cell may occupy a cup. Subsequent incoming cells will be deflected to the next available... 

Depending on operating conditions such as the level of surfactant, the solubility of the monomers, the rate of radical generation, and so on, one or more of the three mechanisms (homogeneous nucleation, micellar nucleation, and nucleation in droplets) will predominate. However, the first two processes tend to be the most common. Indeed, the nuclei, produced by homogeneous nucleation, and also the micelles, have sizes of several nanometres and are relatively numerous, whereas the monomer droplets have diameters of several tens of microns, and are so scarce that the capture area they present to growing radicals is negligible compared with that of the tiny colloids. It is only when rather... 

Propfan. Propfans are turbofans in which the fan has no cowling, so that it resembles a propeller and has a larger capture area, but the blades are highly swept and wider than propeller blades. 

Figure 13-2. A beam of parallel monochromatic radiation with power Po strikes the block perpendicular to a surface. After passing through a length b of the material, which contains n absorbing atoms, ions, or molecules, its power is decreased to P as a result of absorption. Consider now a cross section of the block having an area. S and an inhnitesiniai thickness d.x. Within this section there are dn absorbing particles we can imagine a surface associated with each particle at which photon capture will occur. That is, if a photon reaches one of these areas by chance, absorption will follow immediately. The total projected area of these capture surfaces within the section is designated as dS, the ratio of the capture area to the total area, then, is dSIS. On a statistical average, this ratio represents the probability for the capture of photons within the section.

Calculation showed that capture area of stagnation zone differs at various time. So the reversing a well at three different time are considered to get an optimal value of extraction degree a) T = 100 days, b) T = 200 days, c) T = 300 days. 

Oleophilic fibers (component of sheet, oil capturing area)... 

The value of e (sometimes incorrectly referred to as the extinction coefficient ), is most usually quoted for a concentration of 1 M and a path length of 1 cm. However, if the concentration is expressed in mol m (= 1000 x M) and I is expressed in meters (= cm/l(X)) then the units of e are m mol, suggesting that the absorptivity depends on the effective capture area of the sf>ecies. This indicates that e combines the transition probability and the nature of the absorbing species. (Note that in m mol" = f in (cm M) /lO-... 

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