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Natural vs. Man-made Chemicals?

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Presentation on theme: "Natural vs. Man-made Chemicals?"— Presentation transcript:

1 Natural vs. Man-made Chemicals?

2 Do you agree? “Natural is good, man-made is bad”

3 “All substances are poisonous,
there is none which is not a poison; the right dose differentiates a poison from a remedy.” Paracelsus, circa 1538

4 Natural can still be fatal

5 7 most deadly chemical compounds
LD50 /mg/kg Botulinum toxin 3 x 10-8 Tetanus toxin 5 x 10-6 Diphtheria toxin 3 x 10-4 Dioxin* 3 x 10-2 Muscarine 2 x 10-1 Bufotoxin 4 x 10-1 Sarin* LD50 = The lethal dose of a compound for 50% of animals exposed * Synthetic

6 The best chemists can do:

7 Viktor Yushchenko President of the Ukraine
July December 2004

8 Muscarine – from fly agaric mushrooms

9 Bufotoxin – from the common toad

10 The next ten most deadly
Chemical Compound LD50/ mg/kg Strychine 5 x 10-1 Soman* 6 x 10-1 Tabun* Tubocurarine chloride 7 x 10-1 Rotenone 3 Isoflurophate* 4 Parathion* Aflatoxin B1 10 Sodium cyanide* 15 Solanine 42 * Synthetic

11 More Natural Toxins Parsley, carrots and celery contain myristicin, which in large quantities can cause hallucinations, liver damage, and even death We only consume very small amounts of each of the different toxic compounds at any one time – our livers can process the toxins and they are broken down


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