Naphthenic acid by a general formula CH O, where "n" indicates the carbon number and "z" specifies a homologous series. The "z" is equal to 0 for saturated, acyclic acids and increases to 2 in monocyclic naphthenic acids, to 4 in bicyclic naphthenic acids, to 6 in tricyclic acids, and to 8 in tetracyclic acids. Salts of naphthenic acids, called naphthenates, are widely used as hydrophobic sources of metal ions in diverse applications.Aluminium salts of naphthenic acid and palmitic acid were combined during World War II to produce napalm. The word "napalm" is derived from the words naphthenic acid and palmitic acid.
The Slaver Weapon alien device, which the Kzinti immediately suspect is a weapon. The weapon passes hands several times between the Federation and Kzinti crews, during which time Sulu discovers a total conversion beam setting. The Kzinti recapture all three Federation personnel and the weapon. As the Kzinti explore the device's many settings, they discover a war computer which starts talking to them. After the Kzinti fail to provide several code words and ask about the total conversion beam setting, the weapon concludes they are enemies and directs them to what it claims is the setting that they want but which is actually