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… Manometers; (d) Thermometers; and (e) Sphygmomanometers. • Biocide is a substance or micro- organism that kills or … growth of living organisms. In this context, the term biocide includes the principal way mer- cury has been used to … mercury was used in paints in very large quantities as a biocide to pre- vent bacteria from growing in the paint while …