Dynamics of the oxidation rate of unithiol (sodium dimercaptopropansulfonate) by sodium nitrite was studied under perfect ecological conditions in Antarctica. Short-term spikes (signals) in optical density of the examined solution were found. Special features of these signals, such as the high penetrating ability, the obvious dependence of number of signals on the Sun' longitude, and the high speed of propagation (V > or = 300,000 km/s), indicate the astrophysical origin and possible gravitational causality of these signals.
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