The material below is Open Game Content from a 3PP Source
School necromancy; Level cleric 2, sorcerer/wizard 3, witch 2
Casting Time 1 standard action
Components V, S, M/DF (salt and a copper piece for each of the corpse’s eyes)
Target corpse touched
Duration 1 day/level
Saving Throw Will negates (object); Spell Resistance yes (object)
You preserve the remains of a dead creature so that they do not decay. Doing so effectively extends the time limit on raising that creature from the dead (see raise dead). Days spent under the influence of this spell don’t count against the time limit. Additionally, this spell makes transporting a slain (and thus decaying) comrade less unpleasant.
The spell also works on severed body parts and the like.