Fig. 5. Change in CL-20 concentration in China Lake soil microcosms amended with ¹⁴C-hexanitrohexaazaisowurtzitane (¹⁴C–CL-20; 3.5 mg L^–1, 1.44 µCi L^–1). (A) Surface soil; (B) subsurface soil. Symbols: unamended soil, open circles; soil + glucose, solid triangles; soil + glucose + HgCl₂, open triangles; mineral salts medium + glucose, solid squares.