Preview
![image preview](https://commons.und.edu/mbio-lab-images/1083/preview.jpg)
Creation Date
4-30-2020
Description
Nitrate tests after reagents A and B are added:
(left) E. coli - positive
(middle) Pseudomonas aeruginosa – need to add zinc
(right) Alcaligenes faecalis – need to add zinc
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