5982
This study aimed to describe the pathologies in gill , gut , liver , kidney , brain and muscle of juvenile rainbow trout , Oncorhynchus mykiss , exposed in triplicate to either a control ( no added Cu ) , 20 or 100 mu g l ( - 1 ) of either dissolved Cu ( as CuSO ( 4 ) ) or Cu - NPs ( mean primary particle size of 87 +/- 27 nm ) in a semi - static waterborne exposure regime .
 Chemical: Cu; Chemical: Cu; Chemical: CuSO ( 4 ); Chemical: Cu
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: Cu; Chemical: Cu; Chemical: CuSO ( 4 ); Chemical: Cu