| Number
                 of Samples | 
        Silicon
                in Sample | 
        Silicon
                 on Spore Coat 
                (% spores) | 
        Analytical
                Method | 
        Sample Types | 
       
      
        | 28 | 
        0.01-0.5, 
          av. 0.14 wt% | 
          | 
        ICP-OES | 
        Miscellaneous | 
       
      
        | 10 | 
        n.d.B | 
          | 
        ICP-OES | 
        B. cereus | 
       
      
        | 2 | 
        0.25 wt% | 
          | 
        ICP-OES | 
        Dugway Rev. 
          Engineered | 
       
      
        | (8) | 
        artifactC | 
        n.d.
          (2 examined) | 
        STEM-EDX | 
        Dugway Rev.
          Engineered | 
       
      
        | 6 | 
          | 
        1-22% | 
        STEM-EDX | 
        Miscellaneous | 
       
      
        | 8 | 
        0.3 wt.% | 
        n.d. | 
        STEM-EDX | 
        RMR 1029 &
          Miscellaneous | 
       
      
        | 55 | 
        0.002-0.4, 
          av. 0.03 wt% | 
          | 
        NanoSIMS | 
        Miscellaneous | 
       
      
        | 1 | 
          | 
        + D | 
        STEM-EDX | 
        from Stewart 1980 | 
       
     
      Total 118 samples: silicon 0-<0.3 wt% in 107 samples; 0.3-0.5 wt% in 3 samples; 
      shown to be an artifact in 8 samples.
      ABased on data in Table 1, excluding attack samples.
      Bn.d. signifies not detected.
      CSee text: silicon detected by ICP-OES in 8 Dugway Reverse Engineered samples 
      has been shown to be a milling artifact.
    D+ signifies “detected”. |