"Hydrocarbon chains" refers to a series of carbon atoms connected together, with hydrogen atoms attached to them. It is a basic structure found in various fuels and oils, such as gasoline or natural gas. Full definition
Fatty acids are long hydrocarbon chains consisting of single carboxylic acid group and are not very soluble in water. (strengthtrainingendeavors.com)
It also allowed the zeolites to convert 60 % of the longer hydrocarbon chains into five key chemical starting materials: benzene, toluene, xylene, propylene, and ethylene. (sciencemag.org)
The second - stage reaction strips off the fatty acids» carboxyl group (a carbon atom, two oxygen atoms, and a hydrogen atom) and breaks the remaining hydrocarbon chains into smaller fragments, yielding a light oil. (discovermagazine.com)