4443
Additions of NH4 + up to 200 micrograms 1 ( - 1 ) were not stimulatory , whereas at 1 . 0 mg 1 ( - 1 ) levels , Ke was 50 % greater than for NO3 - enriched medium .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None