cessation of all life (metabolic) processes. Death may involve the organism as a whole (somatic death) or may be confined to cells and tissues within the organism. Causes of death in human beings include injury, acute or chronic disease, and neoplasia (cancer).
R409A is a blend of HCFC refrigerants introduced to retrofit R12 in air conditioning and refrigeration applications.CFCâs are commonly accepted as having an overall detrimental effect on the environment through both their ozone depletion potential and global warming potential and consequently are being phased out completely.
1 A domestic refrigerator is present in 99.5% of American homes. 2  The earliest units used toxic refrigerants, typically ammonia (R-717), sulfur dioxide (R-764), or methyl chloride (R-40) as their refrigerant. 3  In the 1930s R-12 was used to replace sulphur dioxide as the most commonly used refrigerant. A domestic refrigerator is present in 99.5% of American homes. 2  The earliest units used toxic refrigerants, typically ammonia (R-717), sulfur dioxide (R-764), or methyl chloride (R-40) as their refrigerant. 3  In the 1930s R-12 was used to replace sulphur dioxide as the most commonly used refrigerant.