982
This study aimed to evaluate the antimicrobial effects , the radical scavenging activity ( by DPPH and ABTS tests ) and the antioxidant capacity ( by beta - carotene bleaching test ) of Betula aetnensis leaves extract .
 Chemical: DPPH; Chemical: ABTS; Chemical: beta - carotene
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: DPPH; Chemical: ABTS; Chemical: beta - carotene