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Although that experiment was essentially a proof of concept, Repp thinks his team can shrink the time resolution of THz-STM down to 10 fs, which could reveal even faster processes: electrons gliding across a molecule after it has absorbed light, or hydrogen ions hopping back and forth between different sites, a process called tautomerism that affects the reactivity of many biological molecules.

By experiments conducted with the hydroxy- pyridines he believed that he had demonstrated a relation between tautomerism or changed space relations in these sort of substances and curative properties.