2570
The MIPEF processing variables studied were electric field strength ( from 0 . 4 to 2 . 0kV / cm ) and number of pulses ( from 5 to 30 ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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