Abstract: A method of treating a membrane comprises the steps of providing a membrane with surfaces that define a plurality of pores extending through the membrane. Providing a dispersion of oleophobic fluoropolymer solids. Stabilizing the dispersion with a stabilizing agent. Diluting the dispersion with a wetting agent. Wetting surfaces which define the pores in the membrane with the diluted and stabilized dispersion. Removing the wetting agent and the stabilizing agent from the membrane. Coalescing the oleophobic fluoropolymer solids of the dispersion on surfaces that define pores in the membrane. A composite membrane comprises a porous membrane having a plurality of interconnecting pores extending through the membrane and made from a material which tends to absorb oils and certain contaminating surfactants. A coating is disposed on surfaces of the nodes and fibrils defining the interconnecting passages in the membrane.

Abstract: A method and composition for extending the viability of immotile sperm is disclosed. The method comprises the steps of (a) preparing an animal for semen collection; (b) collecting semen from the animal; (c) treating the collected semen with a storage buffer solution to substantially inhibit sperm motility; (d) storing the semen for a length of time and at a certain temperature; and (e) reactivating the sperm to normal motility by mixing the inhibited sperm with an activation buffer.