The method 4 wherein {HEAD ~ the ethane or propane constituent} of the multicomponent refrigerant is replaced with {TAIL ~ ethylene} or propylene, respectively 
is replaced with
The method 4 wherein { HEAD ~ the ethane or propane constituent } of the multicomponent refrigerant is replaced with { TAIL ~ ethylene } or propylene , respectively
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH