Polluted water can be boiled to purify it. He is summoned to purify a polluted province. Furthermore, treatment processes to purify drinking water and to treat wastewater have been improved. They will be able to purify the six senses. The soul is encouraged to purify itself through yearning of God. Boyle also tried to purify chemicals to obtain reproducible reactions. The simurgh was considered to purify the land and waters and hence bestow fertility. It is frequently used as a solvent for recrystallization to purify organic compounds. Sailor Moon uses her power to purify the Tree and resurrect Ann. It claimed to purify the blood and make rosy cheeks. Korra is able to purify "dark spirits" by balancing the energy within them. The salt is crystallized to purify it and obtain the desired precise stoichiometry. In chemistry, recrystallization is a technique used to purify chemicals. Christians thus had a duty to purify society in preparation for that return. All test tubes containing no measurable trace of the protein to purify are discarded.