title: Nissl technique for staining embryonic spinal cord en bloc.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D006652:Histological Techniques; D010640:Phenothiazines; D013116:Spinal Cord / Q000196:embryology*; D013194:Staining and Labeling / Q000379:methods*
chemical_list: D010640:Phenothiazines; C009469:thionine