How is a shopping cart like a nanoparticle? What coarse-grained molecular models can show us about nano-bio interactions

Imagine you work at a grocery store and you need to figure out how many shopping carts will fit in a certain space. You know that each shopping cart is 33 inches long, but you might decide to round that up to 36 inches (3 feet) for your estimation: That rounding is just one example …