Thus Spake Paracelsus*
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Thus Spake Paracelsus*

The Swiss Renaissance physician, alchemist and founder of toxicology Philippus Aureolus Theophrastus Bombastus (!) von Hohenheim, better known as Paracelsus (Figure 1), said it well: “All substances are poisons; there is none that is not a poison. The right dose differentiates a poison and a remedy.” Or more compactly, “the dose makes the poison.” Continue reading

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Dumping Nanoparticles into a Fjord: How to Think About the Potential Environmental Impacts

Nanoparticles and the Environment Series, Part II  (click here for Part I) Let’s dive in to a real-world nanotechnology problem raised by one of our readers: should waste composed of nanoparticles, let’s call it “nanowaste”, be disposed of differently than regular waste? There are many types of nanowaste that we could discuss, but today we’ll … Continue reading