New type of triterpenes discovered

A collaborative effort has revealed a new type of triterpene, a group of organic compounds which are an important source of many medicines. Until now, all triterpenes were believed to be derived from squalene, itself a type ...

A catalyst for electronically controlled C–H functionalization

The Chirik Group at the Princeton Department of Chemistry is chipping away at one of the great challenges of metal-catalyzed C–H functionalization with a new method that uses a cobalt catalyst to differentiate between bonds ...

On-demand conformation of an artificial cytoskeleton

Peptide nanotubes are tubular-shaped structures formed by the controlled stacking of cyclic peptide components. These hollow biomaterials show inner and outer faces, allowing control over their properties.

Using marinated eggs to demonstrate diffusion

Marinated, or pickled, eggs are enjoyed by cultures around the world. There are Pennsylvania Dutch red-beet pickled eggs, German-style ones with a heavy dose of mustard, and Asian recipes that use rice vinegar and soy sauce, ...

Using 'counterfactuals' to verify predictions of drug safety

Scientists rely increasingly on models trained with machine learning to provide solutions to complex problems. But how do we know the solutions are trustworthy when the complex algorithms the models use are not easily interrogated ...

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