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According to Health Canada, 97% of COVID-19 cases in Canada were either of the BA.4 or BA.5 subvariant as of mid-September 2022. As such, NACI issued a recommendation for people to use one of the approved bivalent vaccines as their upcoming booster shot. [ 129 ]
On August 13, 2021, Minister of Intergovernmental Affairs Dominic LeBlanc and Transport Minister Omar Alghabra announced that the federal government plans to mandate the vaccination of all federal public servants, employees in federally-regulated transport industries, and passengers of commercial air travel, interprovincial rail service, and large marine vessels with overnight accommodations ...
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 1,1,2,2-Tetrafluoroethane (also called R-134 or HFC-134) is a hydrofluorocarbon, a fluorinated alkane. It is an isomer of the more-used 1,1,1,2-tetrafluoroethane (R-134a). It is used as a foam expansion agent and heat transfer fluid.
Refrigerant. A refrigerant is a working fluid used in the refrigeration cycle of air conditioning systems and heat pumps where in most cases they undergo a repeated phase transition from a liquid to a gas and back again. Refrigerants are heavily regulated because of their toxicity and flammability [ 1 ] and the contribution of CFC and HCFC ...
All timelines, overviews, breakdowns, lists, and graphs on this page are based on data published in regular official reports by Health Canada in cooperation with Public Health Agency of Canada. [ 1 ] Timeline of cases and deaths in Canada
1,1,1,2-Tetrafluoroethane (R-134a or HFC-134a), one of the main replacements for the formerly widespread R-12. Opteon halogenated olefins now replacing Freons in many applications. References
The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987, and entered into force on 1 January 1989.
Mineral oil used with R-12 is not compatible with R-134a. Some oils designed for conversion to R-134a are advertised as compatible with residual R-12 mineral oil. Another replacement for R-12 is the highly flammable, but truly drop-in HC-12a , whose flammability has led to injuries and deaths in a bus fire in 2006.