Homogeneous catalysis heterogeneous catalysis is the petrochemical alkylation process, where the liquid reactants are immiscible with a solution containing the catalyst. Heterogeneous catalysis offers the advantage that products are readily separated from the catalyst, and heterogeneous catalysts are often more stable and degrade much slower than homogeneous catalysts. However, heterogeneous catalysts are difficult to study, so their reaction mechanisms are often unknown. Enzymes possess properties of both homogeneous and heterogeneous catalysts. As such, they are usually regarded as a third, separate category of catalyst. Homogeneous catalysis In chemistry, homogeneous catalysis is catalysis in a solution by a soluble catalyst. Homogeneous catalysis refers
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