| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | propionic acid | dairy farming in Northern Europe | Propionic acid is naturally produced by certain bacteria in the fermentation of dairy products like Swiss cheese in Northern European dairy farming. | 1 |
| 2 | propionic acid | traditional food preservation in East Asia | Propionic acid is not commonly used in traditional food preservation methods in East Asia. | 1 |