The Brussels sprout is a member of the Gemmifera cultivar group of cabbages (Brassica oleracea), grown for its edible buds. The leaf vegetables are typically 1.5–4 centimetres in diameter and resemble miniature cabbages. (Wikipedia. 2025. Brussels sprout https://en.wikipedia.org/wiki/Brussels_sprout)
Fractionation is a separation process in which a certain quantity of a mixture (of gasses, solids, liquids, enzymes, or isotopes, or a suspension) is divided during a phase transition, into a number of smaller quantities (fractions) in which the composition varies according to a gradient. (Wikipedia, 2024. Fractionation. https://en.wikipedia.org/wiki/Fractionation)