Genes / Proteins | Definitions | Models | Developmental Models | General Concepts | Contribute/Corrections | Links | Protocols | Home   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z parts per billion (ppb)   Definition: Search for:     Glossary - word Glossary - def Textbooks Protocols Images Tools Forum PubMed Links Press Releases   Biology Glossary search by EverythingBio.com           Represents the concentration of something in water or soil. One ppb represents one microgram of something per liter of water (ug/l), or one microgram of something per kilogram of soil (ug/kg).         A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z    Genes / Proteins  |  Definitions  |  Models  |  Developmental Models  |  General Concepts  |  Contribute/Corrections  |  Links  |  Protocols  |  Home Website created and maintained by: Mark Lefers and the Holmgren Lab last updated: July 26, 2004