FIG. 1.
Mean (±standard deviation) loge proportion of virus remaining nonadsorbed to different minerals after 1 h of incubation for (A) HaSNPV, (B) CrPV, and (C) IIV-6. In all cases, unbound virus activity was compared to mineral-bound virus activity and found to correspond precisely to the reciprocal of the unbound fraction. Column headings with the same letter are not significantly different for comparisons of each virus incubated with different minerals (t test in GLIM, P > 0.05). Numbers in parentheses indicate the number of replicate observations for each mineral tested. A single outlier was eliminated from the analysis of CrPV binding to talc. ND, not determined.