28664
When chi is considered a constant number ( chi = alpha , alpha != 0 ) , formation of a eutectic mixture is predicted in the 70 - 80 % w / w PEG concentration region , while when chi was considered as a function of concentration and temperature ( chi = f ( phi , Tau ) ) , the model predicts the formation of monotectic systems .
 Chemical: PEG
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PEG