OZONE IN RELATION TO STORAGE OF APPLES 



Figure 3. — Effect of ozone on the natural spore load of air in storage rooms filled with 

 apples at 31° F. : A, Penicillium colonies on plates exposed for 30 minutes in a room 

 without ozone and with a blower operating 1 hour before and during exposure; 

 B y colonies on plates exposed in a room in which a concentration of 3.25 p. p. m. of 

 ozone was generated daily for 4 months of storage and a blower was operated as in A. 



Table 2. — Effect of 1.8 p. p. m. of ozone in an egg-storage room of a 

 commercial cold-storage plant on the number of colonies per plate 

 exposed for SO minutes 



Kind of colony 



Colonies per plate 

 exposed in — 



Ozonized 

 room 



Nonozonized 

 room 



Penicillium spp. and other fungi 1 



Number 

 5. 2 

 2. 4 



Number 



28. 4 



Bacteria _ _ _ 



18. 8 







The majority of the colonies were Penicillium (4.8 and 27.8, respectively). 

 763027—48 2 



