It is well known that actinomycete cultures such as Streptomyces griseus have great resistance to filtration $($Aiba et al$.,1972).$ In a batch filtration at constant pressure with a laboratory filter of $110$ cm$2$ area and a pressure drop of $713\mathrm{.}8$ g$/$cm$2,$ a broth with a viscosity of $0\mathrm{.}0011$ N$-$s$/$m$2$ is processed, obtaining the data that appear in the Table. At the end of the process the weight of the dry cake was $9\mathrm{.}75$g$.$ Estimate the specific resistance of the cake $\backslash$alpha and the resistance of the medium Rm