Assertion: crude threonine | /r/MadeOf | threonine
Facets:
value: essentially
type: DEGREE
Source sentences:
text: A process for the purification of crude threonine essentially consisting of threonine and at least one contaminant selected from the group consisting of glycine, allothreonine, and serine, which comprises the steps of reacting the copper salts of said threonine and of said contaminant in aqueous solution with a lower aliphatic aldehyde selected from the group consisting of formaldehyde,