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.
A 34-gram serving of 10 fresh pea pods contains 20.4 milligrams of vitamin C. This amount supplies about 23 percent of the Food and Nutrition Board's recommended daily allowance of vitamin C for an adult man, and 27 percent of the requirement for a woman.