Assertion: l ribose | /r/MadeOf | liquid
Facets:
value: by multiple-step biological reactions
type: MANNER
value: including a lot of impurities
type: OTHER
Source sentences:
text: Further, since any method for isolating and purifying L-ribose from an L-ribose containing liquid including a lot of impurities by multiple-step biological reactions is not known at all, it has been necessary to develop an effective method.
text: Furthermore, as preferred embodiments of the present invention, there are provided the aforementioned method that further comprises contacting an L-ribose containing liquid produced by the aforementioned biological procedures with a gel type filtration medium, or adding an organic solvent to the L-ribose containing liquid so that L-ribulose alone should be deposited without depositing unreacted L-ribulose remaining in the reaction mixture.
text: Then, ½ to {fraction (1/100)} volume, preferably ⅕ to {fraction (1/20)} volume, relative to the volume of the filtration medium filled in the column, of a crude L-ribose containing liquid is fed to the column, and eluted with wafer to fractionate it into an L-ribose fraction and other fractions.
text: If chromatographic separation is again performed prior to the crystallization to eliminate L-ribulose in the L-ribose containing liquid, the crystallization ratio will be further increased.