Assertion: alkaloid's material | /r/HasProperty | isolated by straight-to-base extraction
Facets:
value: by acid/base extraction
type: MANNER
Source sentences:
text: This red material has been isolated both by straight-to-base extraction and by acid/base extraction.
text: This red material has been isolated both by straight-to-base extraction (Noman's) and by acid/base extraction (Marsofold's tek).The crude extraction is invariably an impure mixture.