As used herein “charge” or “charged” refers to {HEAD ~ both negatively and positively charged metabolites} or metabolites that can be induced to have {TAIL ~ charge separation} 
As used herein “ charge ” or “ charged ” refers to { HEAD ~ both negatively and positively charged metabolites } or metabolites that can be induced to have { TAIL ~ charge separation }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL