Indices of mixing

With all mixers, however, it is necessary to establish that an acceptable degree of homogeneity has been reached. Quantitative methodologies for establishing an index of mixing or efficiency of mixing are reported in the literature [94]. 

Index of Mixing Capacity Index of Mixing State... 

Park BK. Assessment of urinary 6(3-hydroxycortisol as an in vivo index of mixed-function oxygenase activity. Br J Clin Pharmacol 1981 12 97-102. 

Figure 5 Compilation of the U37 index of mixed-layer particulates in relation to in situ temperature (Conte et al., in press). The heavy solid line indicates the linear Prahl et al. (1988) paleotemperature relation used for sediment estimates.

As already shown, a series of samples drawn from a random mix exhibits a standard deviation of Sr- An index of mixing, M, suggested by Lacey " is given by Eq. (32),... 

In a cubic system, all the possible R ratios can be tabulated according to hkl pairs. We may find the match of R ratio for specific hkl pairs of a crystal structure. It should be remembered that diffraction must obey the structure extinction laws discussed in Chapter 2. Note that NaCl exhibits a face-centered cubic (FCC) structure for which the diffraction pattern should not include (hkl) indexes of mixed odd and even numbers. Thus, there are no diffraction spots for 100, 110... in Figure 3.30b. We can use the structure extinction laws to determine whether a... 

REFRACTIVE INDEX OF MIXED FILMS OF Si02 AND Ti02, PREPARED BY DIPCOATING, AS A FUNCTION OF MOLAR PROPORTION [28, 36]. 

The method was proposed to linearize polarity index of mixed solvent by introducing a parameter, which connects the E and Z values with fiactional concentrations of components. 

The advantage of using this definition as opposed to that of Eq. 6.15 lies in the range of the index of mixing. Equation 6.15 yields values between 1/n and 00, whereas Eq. 6.17 attains values between 0 and 1. The same idea that transformed Eq. 6.15 to Eq. 6.16 can also be applied to Eq. 6.17. 

Choosing a Mobile Phase Several indices have been developed to assist in selecting a mobile phase, the most useful of which is the polarity index. Table 12.3 provides values for the polarity index, P, of several commonly used mobile phases, in which larger values of P correspond to more polar solvents. Mobile phases of intermediate polarity can be fashioned by mixing together two or more of the mobile phases in Table 12.3. For example, a binary mobile phase made by combining solvents A and B has a polarity index, of... 

The appearance of n as the index of jc in Eq. (3.28) needs to be Justified. Combustion in gas turbines usually involves substantial excess air and the molecular weight of the mixed products is little changed from that of the air supplied, since nitrogen is the main component gas for both air and products. Thus the mean gas constant (universal gas constant divided by mean molecular weight) is virtually unchanged by the combustion. It then follows that... 

For laminar flow - flow in whieh the layers of fluid are stratified aeross whieh there is no mixing apart from that due to moleeular diffusion - Stokes Law (Stokes, 1851) applies. Firstly, however, it is neeessary to define an index of the flow to indieate whether it is laminar or turbulent. This is done through the... 

One can read letters through the porous PVA-PVAc film in benzene, but one cannot do so in cyclohexane nor in the case of the blank. This is supported by the fact that the refractive indices of benzene are close to that of PVA, but the refractive index of cyclohexane is far from that of PVA. When the porous film was dipped in a mixed solvent of benzene and cyclohexane (8.0 2.0 in weight), it became semi-transparent. To make this point clearer, the refractive index and the dispersive power of polymers and organic solvents were measured. The results are shown in Table 3, which shows that the refractive index of PVA is near that of benzene and that the dispersion power of aliphatic compounds is lower than that of aromatic compounds. 

Charge the OH functional urethane water dispersion prepared in Example 8 (200 g, 0.1603 eq. OH) to a suitable container. Vigorously stir the dispersion with a mechanical stirrer and slowly add the 18.8% NCO water-dispersible polyisocyanate described above (40.0 g, 0.1791 eq.). This will give an NCO-OH equivalent ratio (index) of 1.12. To this mixture, add Silwet L-77 (a flow aid from OSi Specialties) and thoroughly mix. Use a draw-down bar to make 6-mil (0.006-in.) wet-thickness films on glass plates and 5-mil (0.005-in.) films on Bonderite-treated steel panels (Bonderite is from Henkel). Condition the resultant films at 72°F and 50% RH for 2-3 weeks before evaluating. For the finished... 

Several experimental techniques may be used, such as acid/base titration, electrical conductivity measurement, temperature measurement, or measurement of optical properties such as refractive index, light absorption, and so on. In each case, it is necessary to specify the manner of tracer addition, the position and number of recording stations, the sample volume of the detection system, and the criteria used in locating the end-point. Each of these factors will influence the measured value of mixing time, and therefore care must be exercised in comparing results from different investigations. 

The applicability of the linear-mixing model is seen most prominently in the interpretation of the 5 C of bone apatite which has been shown to represent the total diet, rather than being derived from energy foods , as was previously proposed by some authors. Although 5 C,p should represent total diet, the isotopic fractionation between this component and total diet appears to be somewhat variable, suggesting that more definite knowledge about this fractionation is needed if we are to use 5 C,p as an index of total dietaiy 5 C values. 

Mechanical Properties and Cure Rate Index of the Mixes—Role of Dry Bonding System on the Reinforcement of Ethylene-Propylene-Diene Monomer (EPDM) Rubber with Melamine Fiber ... 

Mixed solvents are generally unsatisfactory for use in the determination of polymer molecular weights owing to the likelihood of selective absorption of one of the solvent components by the polymer coil. The excess of polarizabilit f of the polymer particle (polymer plus occluded solvent) is not then equal to the difference between the polarizabilities of the polymer and the solvent mixture. For this reason the refractive increment dn/dc which would be required for calculation of K, or of i7, cannot be assumed to equal the observed change in refractive index of the medium as a whole when polymer is added to it, unless the refractive indexes of the solvent components happen to be the same. The size Vmay, however, be measured in a mixed solvent, since only the dissymmetry ratio is required for this purpose. 

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