Streptomycin and programmable logic controller: what they have in common

1. Step 1. Streptomycin — is a kind of — Antibiotic. An antibiotic.
2. Step 2. Antibiotic — uses — Fermentation. Penicillin is produced by fermentation.
3. Step 3. Fermentation — is a kind of — Chemical reaction. A biochemical reaction.
4. Step 4. Chemical reaction — includes — Catalysis. Speeding up a reaction.
5. Step 5. Catalysis — is used in — Chemical plant. Catalysts.
6. Step 6. Chemical plant — has part — Programmable logic controller. Process control automation.

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