OD Unit


An OD unit is a unit of concentration or (loosely) mass, particularly of solutions of nucleic acids or suspensions of bacterial or yeast cells. It is derived from the degree of absorption of light at a specified wavelength by the solution or suspension.

Keywords: optical density; deoxyribonucleic acid; ribonucleic acid

Contact Editor close
Submit a note to the editor about this article by filling in the form below.

* Required Field

How to Cite close
Dear, Paul H(Sep 2005) OD Unit. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1038/npg.els.0005331]