Fig. 4. Cumulative mineralization of ¹⁴C-hexanitrohexaazaisowurtzitane (¹⁴C-CL-20; 3.5 mg L^–1, 1.44 µCi L^–1) to ¹⁴CO₂ in China Lake soil microcosms. (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.