Huperzine A (HUP-er-zeen) is a potent chemical derived from a particular type of club moss (Huperzia serrata [Thumb] Trev.). Like caffeine and cocaine, huperzine A is a medicinally active, plant-derived chemical that belongs to the class known as alkaloids.It was first isolated in 1948 by Chinese scientists.uperzine A (HUP-er-zeen) is a potent chemical derived from a particular type of club moss (Huperzia serrata [Thumb] Trev.). Like caffeine and cocaine, huperzine A is a medicinally active, plant-derived chemical that belongs to the class known as alkaloids.
A gladiator (Latin: gladiator, swordsman, from gladius, sword) was an armed combatant who entertained audiences in the Roman Republic and Roman Empire in violent confrontations with other gladiators, wild animals, and condemned criminals.
George Ville, using evidence from 1st century gladiator headstones, calculated an average age at death of 27, and mortality among all who entered the arena at 19/100. Marcus Junkelmann disputes Ville's calculation for average age at death; the majority would have received no headstone, and would have died early in their careers, at 18â25 years of age. Between the early and later Imperial periods the risk of death for defeated gladiators rose from 1/5 to 1/4, perhaps because missio was granted less often.