The history and use of nitrate and nitrite in the curing of meat.
D000383:Agriculture; D000818:Animals; D005396:Fish Products / Q000266:history; D005513:Food Inspection; D005519:Food Preservation / Q000266:history*; D005520:Food Preservatives / Q000266:history*; D005525:Food-Processing Industry; D006077:Government Agencies; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D049691:History, Medieval; D008460:Meat / Q000032:analysis; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000032:analysis; D012965:Sodium Chloride; D013552:Swine; D014481:United States; D014486:United States Food and Drug Administration
D005520:Food Preservatives; D009566:Nitrates; D009573:Nitrites; D012965:Sodium Chloride