Phase inversion (chemistry) small pore membranes such as nanofiltration and reverse osmosis. Phase inversion (chemistry) Phase inversion is a chemical phenomenon exploited in the fabrication of artificial membranes. It is performed by removing the solvent from a liquid-polymer solution, leaving a porous, solid membrane. Phase inversion is a common method to form filtration membranes, which are typically formed using artificial polymers. The method of phase inversion is highly dependent on the type of polymer used and the solvent used to dissolve the polymer. Phase inversion can be carried out through one of four typical methods: The rate at which phase inversion occurs and
Who is a Jew? in Jewish congregations. A person with one or two grandparents enrolled in a Jewish congregation could be classified as "Mischling", a crossbreed, of "mixed blood", if they were not a member of a Jewish congregation at the time the Nuremberg Laws were enacted. Only people with at least two of their grandparents of "German blood" could be German Reich's citizens, other Germans dropped into the new second class group of citizens, the so-called state citizens. If a person, with grandparents of the same religious combination, was enrolled as a member of a Jewish congregation in 1935 or would join later,