11565
The work in this article describes a spectral signature for the detection of a C ( alpha ) radical damaged peptide , which should enable the use of infrared spectroscopic methods to directly monitor oxidative events .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None