So far the reaction has been fantastic and I'm so pleased with the way it all looks. (boho-weddings.com)
In contrast, melatonin breaks into very stable products upon oxidation; hence further reaction with free radicals does not reduce it any further. (fitnessandpower.com)
They found that less of the desired solid was formed because the solid CaCO3 quickly changed the porosity of the system, forming barriers in the pore spaces and blocking further reactions between the two solutions. (pnnl.gov)