Carboxyl groups have an electronegative oxygen atom double bonded to a carbon atom. This carbon-oxygen bond is very polar and the fact that its a double bond increases the polarity of the bond.
PEA agar, also referred to as Phenylethyl Alcohol Agar is a medium  used by microbiologists to grow microorganisms. The ingredient that  supplies nitrogen is casein. Making the world better, one answer at a time.
The seeds need to be soaked in clean, cool water for 8-24 hours. Allow enough water and have a big enough container for the peas to nearly double in size. Before: 2 cups pea shoots + 4 cups water for a 10Ã20 tray.