Expression zones

The distribution patterns of these sensillum types confirm the existence of expression zones running diagonally across the funiculus (Figure 23.ID). The ab3 sensilla occur in the most medial part of zone I followed by abl and ab2 sensilla. Ab4 and ab6 are limited to zone 2 and ab5 and ab7 are spread out over zones 2 and 3 (de Bruyne et al., 2001). The atl sensilla are distributed in the most proximal part of zone 3 whereas at2 occur more laterally (Clyne et al.,... 

Fish OR genes are expressed in spatial expression domains that are broader and overlap more than the mammalian expression zones, but otherwise have the same characteristics of several receptors intermingling in one domain (Weth et al. 1996). 

By using the method of the dyadic Green s function [4] and the adequate boundary conditions [5], the expressions of the electric field in the zone where the transducer is placed can be written as [2]... 

In addition, the non-bonded forces can be divided into several regions according to pair distances. The near region is normally more important than the distant region because the non-bonded forces decay with distance. Since most of the CPU time in a MD simulation is spent in the calculation of these non-bonded interactions, the separation in pair distance results in valuable speedups. Using a 3-fold distance split, the non-bonded forces are separated in 3 regions near, medium, and fax distance zones. Thus, the Liouville operator can be express as a sum of five terms... 

Thermal comfort may be defined as "that condition of mind in which satisfaction is expressed with the thermal environment" (4). It is thus defined by a statistically vaUd sample of people under very specific and controlled conditions. No single environment is satisfactory for everybody, even if all wear identical clothing and perform the same activity. The comfort zone specified in ASHRAE Standard 55 (5) is based on 90% acceptance, or 10% dissatisfied. 

For weU-defined reaction zones and irreversible, first-order reactions, the relative reaction and transport rates are expressed as the Hatta number, Ha (16). Ha equals (k- / l ) where k- = reaction rate constant, = molecular diffusivity of reactant, and k- = mass-transfer coefficient. Reaction... 

An equation representing an energy balance on a combustion chamber of two surface zones, a heat sink Ai at temperature T, and a refractory surface A assumed radiatively adiabatic at Tr, inmost simply solved if the total enthalpy input H is expressed as rhCJYTv rh is the mass rate of fuel plus air and Tp is a pseudoadiabatic flame temperature based on a mean specific heat from base temperature up to the gas exit temperature Te rather than up to Tp/The heat transfer rate out of the gas is then H— — T ) or rhCp(T f — Te). The... 

Heat Transfer In general, the fluid mechanics of the film on the mixer side of the heat transfer surface is a function of what happens at that surface rather than the fluid mechanics going on around the impeller zone. The impeller largely provides flow across and adjacent to the heat-transfer surface and that is the major consideration of the heat-transfer result obtained. Many of the correlations are in terms of traditional dimensionless groups in heat transfer, while the impeller performance is often expressed as the impeller Reynolds number. 

At the end of the zone-refining operation the zone reaches the right-hand end of the bar. The liquid at the left of the zone then begins to solidify so that in time the length of the zone decreases to zero. Derive expressions for the variations of both Cg and Cl with distance x in this final stage. Explain whether or not these expressions are likely to remain valid as the zone length tends to zero. 

It is now necessary to determine the average step length (s) to obtain an expression for (H). The step length is that length moved by the molecule relative to that of the zone center and, while the molecule has move (vta) during time (ta), the zone center... 

An approximate solution to this expression can be obtained if we assume m /ms to be constant, i.e., an average mass ratio in the thiekening zone from top to bottom. This results in the following expression ... 

More reliable results can be obtained by assuming average conditions over divided parts of the compression zone. That is, the above expression can be applied to divisions of the compression zone and the total volume obtained by the sum of these calculations. Try some of the problems in the section on Questions for Thinking and Discussing to strengthen your understanding of the principles covered. 

The heat balance to the three-zone jacket can be expressed by... 

Consider the jaeket zoning of a bateh reaetor to determine the times required for a temperature adjustment step [14], is replaeed by n W and the jaeket outlet temperature tj by t in Equation 13-50. The heat balanee for eooling is expressed by ... 

Substituting Equation 13-94 into Equation 13-91 gives a general expression for predieting the temperature resulting from mixing the outlet streams from multiple jaeket zones. This is expressed by... 

No prequalification is required for vendors who perform simple deliveries or drop ship (i.e., Federal Express, telephone company, bottled water supplier, trash collector, utility companies, supply and material deliveries), and would not involve entrance into an exclusion/contaminated zone. 

According to Abramovich,Regenscheit, " and Shepelev, the relation between the velocity distribution and the temperature distribution in the cross-section of nonisothermal compact, linear, or radial jets within Zone 3 can be expressed as... 

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