Ajesara opo suga,bi o ti jafafa laarin awon agba, ko jafafa laarin awon omodeti ojo ori won din ni odun meji tabi awon ti o le yara ko aisan.[1]  Ajesara naa ko lewu rara.. 
Karl Elbs, ojo ketala osu kesan odun 1858 ni Alt-Breisach, Baden, Germany – ojo kẹrinlelogun osu kejo odun 1933) je onimo chemistry omo orile ede Jamani.. 