24783
The adsorption of surfactant is reversible upon rinsing , but slight changes of the structure of the preadsorbed PAMAM monolayer were observed .
 Chemical: PAMAM
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: PAMAM