Phase inversion (chemistry) 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 the characteristics of the resulting membrane are dependent on
Only a Game 2018, WBUR announced that Bill Littlefield was "hanging up his cleats." He hosted his final episode as regular host, after 25 years of hosting Only a Game, on July 28, 2018. No regular followup host has yet been announced. Guests on "Only a Game" have included John Updike, former U.S. Poet Laureate Robert Pinsky, commentator Bud Collins; current and former athletes Muhammad Ali, Kristine Lilly, former U.S. Senator Bill Bradley, Bill Russell, Oscar Robertson, Lenny Wilkens, and Kareem Abdul-Jabbar; and coaches Pat Summitt and Geno Auriemma. Only a Game Only a Game is a weekly sports program distributed by National