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 serving of 10 fresh pea pods provides 8.5 micrograms of vitamin K, or 7 percent of a man's daily requirement and 9 percent of a woman's. By including foods rich in vitamin K in your diet, you may lessen your risk of osteoporosis, bone fractures and excessive bleeding when you're cut or injured.