Glossary beginning with P

Click one of the letters above to find terms beginning with that letter.
phenol search for term

A common preservative in allergenic extracts. It is bacteriostatic, which means it inhibits the growth of bacteria. The FDA mandates that all multiple dose vials must contain a preservative of some kind to ensure sterility.

PNU search for term

Protein Nitrogen Unit. A rough estimate of protein concentration used in non-standardized products. It is based on the nitrogen content, which is an integral part of all protein. One mg (milligram) of nitrogen is equal to 100,000 PNU.