9152
The gelation behavior has been examined in 30 liquids of diverse structure and polarity , and the properties of their gels and the gelation mechanisms have been investigated using a variety of techniques .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None