If you want to produce a drug, it may take a huge number of chemical steps — so many that it's not economically feasible using just chemistry. (discovermagazine.com)
Getting them from this place to a position near the nickel takes several chemical steps, requiring energy and slowing down the catalyst. (pnnl.gov)
In earlier work published in Proceedings of the National Academy of Sciences, Peersen and co-authors had discovered the exact chemical steps by which the RNA - dependent RNA polymerase copies the virus genome. (sciencedaily.com)