7515
The rate constants for the three hydrogen abstraction reaction channels over the temperature range 200 - 1 , 500 K were calculated by the improved canonical variational transition state theory ( ICVT ) with a correction for small - curvature tunneling ( SCT ) .
 Chemical: hydrogen
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: hydrogen