24370
Propensity of two different silver nanoparticles ( Ag - NPs ) to bovine hemoglobin ( BHb ) was investigated by means of spectroscopic methods .
 Chemical: silver; Chemical: Ag
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: silver; Chemical: Ag