Assertion: l tryptophan | /r/HasProperty | precipitated in the form of a crystal
Facets:
Source sentences:
text: More specifically, if L-tryptophan is precipitated in the form of a crystal in the reaction liquid, water is added to dissolve the crystal, the insoluble substances such as cells are removed from the reaction liquid by centrifugal separation or filtration, and L-tryptophan is ordinarily recovered according to any of the following methods: (1) a method in which the pH value of the reaction liquid is adjusted to the isoelectric point to precipitate L-tryptophan and the precipitated L-tryptophan is recovered, (2) a method in which L-tryptophane is adsorbed by using an ion exchange resin and it is then desorbed therefrom, (3) a method in which L-tryptophan is precipitated in the form of a hardly soluble metal salt and the precipitated metal salt is recovered, (4) a method in which a water-soluble organic solvent is added to the filtrate to effect crystallization and the resulting crystal is recovered, and (5) a method in which the filtrate is subjected to electrodialysis and separated L-tryptophan is recovered.