Nuclear reactivity INDEX

Finally, just as we were able to define in Sect. 5 the nuclear softness, a local nuclear reactivity index in analogy with the electronic local softness, we can now introduce nonlocal nuclear reactivity indices in analogy to the electronic softness kernels [3], We define the nuclear softness kernels as follows... 

A third approach has been to identify a nuclear reactivity index, h f), which defines a local hardness ... 

Fa is the force exerted on nucleus a by the electron cloud. The reactivity index is also a nuclear Fukui function. Although it is completely general. Equation (6.27) has been applied mainly to surface atoms. 

Because MIB-1 monoclonal antibody is used extensively to determine the cell proliferation index, its applications are discussed below. This antibody detects the nuclear antigen Ki-67 expressed in proliferating cells but not in resting cells. The antibody reacts with the nuclei of cells in mid-Gj (first gap), S (DNA synthesis), G2 (second gap), and M (mitosis) phases, but not in the G0 or quiescent phases. The use of MIB-1 antibody is one of the simplest and most reliable labeling techniques for assessing the rate of proliferation of a neoplastic cell population. Thus, the antibody can be used to assess the growth fraction (i.e., the number of cells in cell cycle) of normal, reactive, and neoplastic tissues. 

Reactivity Functional parameter of a nuclear reactor, which expresses an instantaneous balance of the neutron multiplication processes and represents an index of the tendency to the variation of the power generated in the core at a certain instant. If reactivity is zero, then the power stays constant if the reactivity is positive, the power increases and the contrary happens if the reactivity is negative. Release (of fission products) Dispersion of radioactive contamination outside one or more design barriers (s). 

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