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Hence , the present study depicts the potential of Zn in moderating the changes caused by Al on membrane composition and fluidity in rat brain .
 Chemical: Zn; Chemical: Al
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: Zn; Chemical: Al