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.
Leave the peas in the ice water for 2 minutes. Once again, drain them well in a colander. Single Layer Freeze. Spread the blanched sugar snap pea pods in a single layer on a baking sheet. Freeze for 1 to 2 hours (until completely frozen through).