1023] 



CAMP — CITRIC ACID AS A SOURCE OF CARBON 



259 



4 (table xn) was less than the titration of the blank, while in the 



] 



case of organism 9 all titrations on sugar media were more than 



TABLE XII 



HYDROGEN-ION CONCENTRATION AND TITER OF DEXTROSE SOLUTION 



AFTER FERMENTATION BY VARIOUS FUNGI 













Organism 



Solution 



Ph 



Cc. N/10 

 NaOH 



Period of fer- 

 mentation (days) 



Blank 



Ca 



2.5 



4.0 







K 



2.5 



4.0 







NH 4 



2.5 



4.6 







K 



6.9 



■ 



l.i 



6 





NH 4 



2.1 



9.2 



6 



2 



Ca 



7.2 



1.0 



3 





K 



6.7 



0.4 



3 





NH 4 



2.4 



4.5 



3 





K 



5.2 



2.3 



6 





NH 4 



6.5 



1.7 



6 



3 



Ca 



7.4 



0.8 



3 





K 



7.2 



0.3 



3 





NH 4 



4.4 



3.2 



3 





K 



6.8 



0.95 



6 





NH 4 



2.2 



7.3 



6 



4 



Ca 

 K 



4.2 



5.2 



3 





NH 4 



2.4 



21.75 



3 



7 



K 



7.0 



0.8 



6 





NH 4 



4.2 



2.1 



6 





K 



2.1 







13.5 



6 





NH 4 



2.9 



8.9 



6 







Ca 



2.7 



6.6 



3 





K 



2.2 



18.35 



3 





NH 4 



2.0 



8.35 



3 





K 



6.0 



1.1 



6 





NH 4 



2.1 



10.3 



1 » 



6 



11 



Ca 

 K 



6.8 



0.7 



3 





NH 4 



2.2 



11.1 



3 



the blank. With the exception of Penicillium stoloniferum, in 

 the presence of NHUNO,, no titration of the culture solutions of 



