a complex of colloidal gold and concanavalin a ( cg-con a ) with various biological properties and high ultrastructural resolution was applied into the sulcus of rat molar gingiva and traced with an electron microscope for three hours to examine the cytological changes occurring in the cells of the junctional epithelium ( je ) during penetration of extrinsic irritants , and to determine the roles of je cells in such a circumstance .
C1516932
cells
C0007634
the