7652
Experimental results showed that the water domains in the W / O microemulsion had a lower polarity than bulk water and a normal solubility for salt species , indicating that the SFMEs have much significance in the preparation of various nanomaterials .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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