Weather modification reagents. I. On the presentation and interpretation of the cold chamber ice-nucleating reagent activity measurement

Summary

New activity coefficients for ice-forming characteristics of the pyro-technical mixtures are proposed. For activity-temperature relationship, we propose the following empirical expression:

$$\log A = \frac{{B_1 \cdot temperature}}{{B_2 + temperature}}$$

where,A — number of created ice crystal per gram pyrotechnical mixture,B ₁ — maximum activity of the reagent,B ₂ — temperature at which the activity has half of its maximum value.

Therefore, theB ₁,B ₂ andB ₂/B ₁ coefficients show potential use in the describing of the activity of ice nucleating reagents. The above equation is transformed algebraically into other forms that are more useful for plotting experimental data. One of the most convenient transformations is

$$\frac{{temperature}}{{\log A}} = intercept + slope \cdot temperature$$

B ₁ andB ₂ may be evaluate as$B_1 = \frac{1}{{slope}}and B_2 = \frac{{intercept}}{{slope}}$

This method does has a potential application for the quantitative presentation and interpretation of cold chamber ice-nucleating reagents activity measurements since it permits rapid, precise, accurate and low-cost analyses.