The dye is nontoxic. While the river stays bright for several hours, some trace of color can remain for days. A second St. Patrick's Day parade was scheduled for Sunday on Chicago's South Side.
When the temperature increases, the polarity of the solvent slightly decreases, which causes these dyes to emit light at different wavelengths and intensities. By measuring the ratio of ...
The dye is nontoxic. While the river stays bright for several hours, some trace of color can remain for days. A second St. Patrick’s Day parade was scheduled for Sunday on Chicago’s South Side.
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