Assertion: nucleolus's structure | /r/HasProperty | clarified using the electron microscope
Facets:
value: more recently
type: TEMPORAL
Source sentences:
text: The nucleolus can be observed with the light microscope, and was much studied in the nineteenth century; its structure has more recently been clarified using the electron microscope.
text: The nucleolus can be observed with the light microscope, and was much studied in the nineteenth century; its structure has more recently been clarified using the electron microscope.