Fifth-power type

This relation predicts that is asymptotically proportional to 2 for laige 2. Expressions for or(2) (and also as( ) which appears below) which give this type of asymptotic behavior are often called fifth-power type. Another feature of Flory s theory is that it permits evaluation of the proportionality constant (called the prefactor or front factor) in the asymptotic relation r 2. In a paper of 1960, Kurata et al. [15] criticized eq 1.15 by deriving an expression of third-power type on the basis of an ellipsoid polymer coil model. Although their conclusion was not ultimately accepted, this paper played an important role because it triggered intensive debates over the chain length dependence of polymer dimensions in the years to come. 

Fig. 7-9. Vertical mass flux of soil-derived aerosol versus the wind friction velocity for different soil types. [Adapted from Gillette (1980).] The solid line indicates a fifth-power dependence. The key on the right correlates soil type with wind erodibility groups (WEG) [after Hayes (1972)] and erodibility in units of 103 kg/ha yr [after Lyles (1977)].

Most of the measurements described in the fifth section have been carried out using a low-power dilution refrigerator. This apparent constraint obliged the authors of the experiments to look for original configurations which are fully discussed in the text. We avoided to make a list of the suppliers of cryogenic equipments as happens in most books, since this type of information is at present easily obtained through internet. 

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