Factor defined

Throughout this discussion we have used the numerical fraction of molecules in a class as the weighting factor for that portion of the population. This restriction is not necessary some other weighting factor could be used equally well. As a matter of fact, one important type of average encountered in polymer chemistry is the case where the mass fraction of the ith component is used as the weighting factor. Defining the mass of material in the ith class as mj, we write... 

Sphericity. Sphericity, /, is a shape factor defined as the ratio of the surface area of a sphere the volume of which is equal to that of the particle, divided by the actual surface area of the particle. 

In equation 26, F is the MTD correction factor and, in general, is a function of the flow configuration and the two temperature factors defined ... 

A dispersion factor, defined as the ratio of the number of surface atoms to the total number of atoms ia the particle, is commonly used to describe highly dispersed systems that do not exhibit a particularly high surface-area-to-volume ratio (22). Representative values for 10-, 100-, and 1000-nm particles are, respectively, on the order of 0.15—0.30, 0.40, and 0.003—0.02, depending on the specific dimensions of the atoms or molecules that comprise the particles. Other quantities can be used to describe the degree of dispersion (6,7), but these tend to assume, at least, quasi-equUibrium conditions that are not always met (7,23). 

Unprotected racemic amines can be resolved by enantioselective acylations with activated esters (110,111). This approach is based on the discovery that enantioselectivity of some enzymes strongly depends on the nature of the reaction medium. For example, the enantioselectivity factor (defined as the ratio of the initial rates for (3)- and (R)-isomers) of subtiHsin in the acylation of CX-methyl-ben zyl amine with tritiuoroethyl butyrate varies from 0.95 in toluene to 7.7 in 3-methyl-3-pentanol (110). The latter solvent has been used for enantioselective resolutions of a number of racemic amines (110). 

For pure organic vapors, the Lydersen et al. corresponding states method is the most accurate technique for predicting compressibility factors and, hence, vapor densities. Critical temperature, critical pressure, and critical compressibility factor defined by Eq. (2-21) are used as input parameters. Figure 2-37 is used to predict the compressibihty factor at = 0.27, and the result is corrected to the Z of the desired fluid using Eq. (2-83). 

In any event the value of iri the presence of a chemical reac tion normally is larger than the value found when only physical absorption occurs, 7c . This has led to the presentation of data on the effects of chemical reaction in terms of the reaction factor or enhancement factor defined as... 

To obtain the current rating for any other grade of busbar, multiply the above figures by the appropriate factor defined in Table 30.6. 

Other grades as BS 1474 and BS 2898, for electrical purposes, and as produced by the leading manufacturers, are provided in Table 30.6. To obtain the current rating for any other grade of busbar, multiply the above figures by the appropriate factor defined in Table 30.6. 

Interpolation methods based on N chemical shifts require the use of the general equations.Those reported in the previous edition (76AHCSl,p. 29, see also 82JOC5132) have been slightly modified for the present purpose. We call / x the observed average property, and the property of the individual tautomers (A or B), / ma and / mb a corresponding property that can be measured (in a model compound or in the solid state) or calculated theoretically, and P and / b the correction factors defined as P = -... 

C = empirical constant in CCFL correlation Cl = liquid pha.se loading factor defined in Equation 8-282, ft/s... 

Clw = measured rate of weeping from Equation 8-277 Cv = gas phase loading factor defined in Equation 8-281, ft/.s... 

E = superficial liquid entrainment rate, Ib/hr/ff Fj, Fj = correlation factors defined by equations... 

The unique natural frequencies of dynamic machine components are determined by the mass, freedom of movement, support stiffness, and other factors. These factors define the response characteristics of the rotor assembly (i.e., rotor dynamics) at various operating conditions. 

Another parameter used to characterise two-phase partitioning is the purification factor, defined as ... 

Cost Factors) Define a cost-accounting model that includes consumables, labor, write-off, workload, and frequency of recalibration to estimate the cost per result. 

In the developing flow region, Zhang et al. [88] recommend the use of an apparent friction factor defined as ... 

An important exact result follows from Eq. (34.27) for the observable symmetry factor defined as... 

Equation (I.IS) Is valid for open tubular columns under all normal conditions and for packed columns at low mobile phase velocities. The average carrier gas velocity is calculated from the outlet velocity by correcting the latter for the pressure drop across the column, and is simply given by u - ju, where j is the gas compressibility correction factor, defined In equation (1.2). 

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