title: Freeze drying and shadowing a two-dimensional periodic specimen.
mesh_terms: D001407:Bacillus / Q000648:ultrastructure; D005612:Freeze Drying / Q000379:methods*; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D055095:Optics and Photonics; D010784:Photomicrography / Q000379:methods; D013194:Staining and Labeling; D013816:Thermodynamics