3598
After extensive measures of intracellular iron in two forms and total iron , we found that the intracellular iron ion significantly increased with intracellular total iron and nanoparticle iron , demonstrating degradation of this nanoparticle into iron ion in cells .
 Chemical: iron; Chemical: iron; Chemical: iron; Chemical: iron; Chemical: iron; Chemical: iron
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: iron; Chemical: iron; Chemical: iron; Chemical: iron; Chemical: iron; Chemical: iron