{HEAD ~ An electromechanical measurement cell} 2, wherein {TAIL ~ said organic acid} is a citric acid 
{ HEAD ~ An electromechanical measurement cell } 2 , wherein { TAIL ~ said organic acid } is a citric acid
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH