The method 1, wherein {HEAD ~ the exothermically heated potassium acetate solution} is applied at {TAIL ~ a temperature} above 50° C 
is applied at
The method 1 , wherein { HEAD ~ the exothermically heated potassium acetate solution } is applied at { TAIL ~ a temperature } above 50 ° C
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH