Zeotropic mixture harmful effects that hydrochlorofluorocarbons (HCFC) and chlorofluorocarbons (CFC) have on the ozone layer and global warming. Researchers have focused on using new mixtures that have the same properties as past refrigerants to phase out harmful halogenated substances, in accordance to the Montreal Protocol and Kyoto Protocol. For example, researchers found that zeotropic mixture R-404A can replace R-12, a CFC, in household refrigerators. However, there are some technical difficulties for using zeotropic mixtures. This includes leakages, as well as the high temperature glide associated with substances of different boiling points, though the temperature glide can be matched to the temperature difference
1987–88 Montreal Canadiens season four years in a row, sweeping the Bruins in three of the past four seasons, and beating them 3–2 in a best-of-five the other year. This time, the Bruins' defence would wear down Montreal, as Ken Linseman, Ray Bourque and Cam Neely provided the offence to finally conquer the Canadiens. It was the first Bruins' playoff series win over the Habs in 44 seasons. "Boston wins best-of-seven series 4–1" Montreal's draft picks at the 1987 NHL Entry Draft held at the Joe Louis Arena in Detroit, Michigan. 1987–88 Montreal Canadiens season The 1987–88 Montreal Canadiens season was the team's 79th