Zinc is naturally present in water. The average zinc concentration in seawater is 0.6-5 ppb. Rivers generally contain between 5 and 10 ppb zinc. Algae contain 20-700 ppm, sea fish and shells contain 3-25 ppm, oysters contain 100-900 ppm and lobsters contain 7-50 ppm.
Cyanides (more exactly as cyanogenic glycozides) exist in cassavaroots, and fruit seeds as apricots, prunes, peaches, almonds etc. Cyanide is historically found in the seeds â¦of some fruits. Applesseeds contain cyanide, but a person would have to eat a lot ofapple seeds for the cyanide to have any negative effects. Cyanide is natural found in certain foods. This includes cassava,almonds, pits of some types of fruit, and Lima beans.
It is sometimes described as having a bitter almond smell, but it does not always give off an odor, nor can everyone detect the scent. Cyanide is usually found joined with other chemicals in compounds: hydrogen cyanide, cyanogen chloride, sodium cyanide, and potassium cyanide. In the death camps of World.et the truth is we routinely come into contact with naturally occurring poisons in a number of the fruits we ingest. Apples are one such fruit: their pips (seeds) contain amygdalin, a cyanide and sugar compound that degrades into hydrogen cyanide (HCN) when metabolized.