The ability of water to neutralize soap, due to the presence of cations such as calcium and magnesium; usually expressed as parts per million equivalents of calcium carbonate. Refers to the calcium and magnesium ion concentration in water on a scale of very soft (0-20 ppm as CaCO3), soft (20-50 ppm), hard (50-500 ppm) and very hard (55+ ppm).
A mandatory Food and Drug Administration (FDA) seafood inspection program required by fish processors, wholesalers, and retailers.
Progeny resulting from a cross between parents that are genetically unlike.
Hydrogen Ion Concentration
The cause of acidity in water. See pH.
An odorous, soluble gas, H2S, resulting from anaerobic decomposition of sulfur-containing compounds, especially proteins.