424 Marine Microbiology 



NaCl. We do not report here the results obtained with the nitrate 

 curves which are similar to those obtained for nitrite. 



In Tables 1 and 2 are reported the speeds of nitrite and 

 nitrate production by marine and by terrestrial strains as a func- 

 tion of NaCl concentration in the culture media. It is clear that 



TABLE 1 



Micrograms of Nitrous Nitrogen per 10 ml of Medium 



Medium 1: 0.1% NaCl Medium 3: 1.2% NaCl 



Medium 2: 0.7% NaCl Medium 4: 5.0% NaCl 



^ 6 



3 



40 50 



