Assertion: alkaloid's activity | /r/CapableOf | use huperzine a
Facets:
value: as positive controls
type: MANNER
Source sentences:
text: Since the insecticidal properties of Stemona alkaloids were found to be associated with acetylcholinesterase (AChE) inhibition various derivatives were screened for their activities in bioassays using huperzine A, physostigmine or galanthamine as positive controls.