Assertion: benzophenanthridine alkaloid | /r/CapableOf | increase biological activity
Facets:
value: at such higher ph
type: TEMPORAL
Source sentences:
text: The biological activity, however, is believed to be associated with the iminium structure, which is the predominant structure at the lower pH. Consequently, it is surprising to find according to the present invention that the benzophenanthridine alkaloids have increased biological activity at such higher pH's and very little activity at lower pH's which cause the iminium structure to be predominant.