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
The Montreal School The Montreal School The Montreal School, as its name suggests, is a school of thought in the field of organizational communication. It was initiated by James R. Taylor and colleagues in the Department of Communication at the Université de Montréal. It origin can be traced back to the introduction in 1987 of a new doctoral program bringing together three major French-language universities in Montreal, the Université de Montréal, the Université du Québec à Montréal, and Concordia University. The Montreal School has had, and continues to have, a global resonance in Europe ) as well as on the American continent, where