Many enzymes require a coenzyme, which makes up a necessary portion of the enzyme. (verywellhealth.com)
We tried this out on the launch and, just like the VW system, the way that it only dips the necessary portion of the full beam, leaving the rest of the road fully illuminated is very impressive. (evo.co.uk)
The project demonstrates financial additionality according to UNFCCC definitions because the revenues from the offset purchases contribute a necessary portion of the overall project funding. (nativeenergy.com)