title: A simple technique for demonstrating heterochromatin in Nigella.
mesh_terms: D002875:Chromosomes / Q000648:ultrastructure*; D003584:Cytological Techniques; D006570:Heterochromatin / Q000648:ultrastructure*; D008938:Mitosis; D010944:Plants / Q000648:ultrastructure*; D013194:Staining and Labeling / Q000379:methods
chemical_list: D006570:Heterochromatin