346 APPENDIX 



7. Nitrification. 



8. Denitrification. 



9. Ammonification. 



VIII. FOOD AND DRINK PRESERVATION 



A. Preservation of Foods. 



1. Freezing. 



2. Cold storage. 



3. Salting. 



4. Drying, evaporating or concentrating. 



5. Smoking. 



6. Corning. 



7. Canning. 



8. Chemical preservatives or antiseptics. 



9. Preserving. 



10. Pressure. 



11. Fermentations. 



B. Preservation of Drinks. 



1. Pasteurizing and sealing. 



2. Cold storage. 



3. Chemical preservatives. 



4. Carbonating. 



5. Filtration. 



6. Fermentation. 



