J-phase

Iron occurs in two aHotropic forms, a or 5 and y (see Fig. 15). The temperatures at which these phase changes occur are known as the critical temperatures. For pure iron, these temperatures are 910°C for the d—J phase change and 1390°C for the y—5 phase change. The boundaries in Figure 16 show how these temperatures are affected by composition. 

Flere C is the volume concentration of j-phase particles is the mass concentration of the analyte in the j-phase particles w is the x-ray fluorescence radiation yield t. is the mass absorption coefficient of the analyte for the primar y radiation d. is the j-phase particle effective size r fs... 

The expressions provide the limiting transition. When d Q for all j-phases, g rTf and the above expression transforms to the expression for a homogeneous sample. In case of the two-component powder, consisting of fluorescent and non-fluorescent par ticles, when size of the non-fluorescent par ticles d - Q, the above expression transforms to the expression for slurrylike substance (A.L. Finkelstein, T.N. Gunicheva, e. a. // X-Ray Spectrom. 1992. V. 21. p. 287-292). In case of the multicomponent powder with the equal size particles the expression transforms to the well-known Berry-Fumta-Rhodes formula. 

Metabolism J. Hepatic blood flow J. Liver size J. Phase I metabolism 1 Incidence liver dysfunction T t /2 hepatically extracted drugs... 

Panagiotopoulos, A. Z. Quirke, N. Stapleton, M. Tildesley, D. J., Phase equilibria by simulation in the Gibbs ensemble alternative derivation, generalization and application to mixture and membrane equilibria, Mol. Phys. 1988, 63, 527-545... 

P. R. Thornton, R. G. Davies, and T. L. Johnston, The Temperature Dependence of the Flow Stress of the j Phase Based on Ni3Al, Metall. Trans, AIME, 1,207 (1970). 

Wisniak, J. Phase Diagrams. Physical Sciences Data 10 (Elsevier-North Holland, New York, 1981). 

Figure 11.9. Phase and modulation measurement of fluorescence lifetime, tan = 2 jr/r = phase difference.

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