Planetary gear und petri dish: was sie gemeinsam haben

1. Schritt 1. Planetary gear — ist Teil von — Watt steam engine. Watt’s “sun and planet” gear got around the patent on the crank.
2. Schritt 2. Watt steam engine — nutzt — Kohle. Steam engines were fired with coal.
3. Schritt 3. Kohle — ist Material für — Synthetic dye. Aniline from coal tar.
4. Schritt 4. Synthetic dye — entwickelte sich zu — Sulfonamides. Prontosil was a red dye.
5. Schritt 5. Sulfonamides — funktioniert wie — Antibiotikum. The first mass-market antibacterial drugs were synthetic sulfonamides; penicillin was discovered earlier (1928) but went into production later.
6. Schritt 6. Antibiotikum — nutzt — Petri dish. Fleming noticed mould in a Petri dish.

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