24437
Neither alpha - elapitoxin - Ppr1 ( 0 . 1 mu M ) nor alpha - elapitoxin - Pc1 ( 0 . 1 mu M ) had a significant effect on the electrically - induced twitches of the rat isolated phrenic nerve - diaphragm preparation .
 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