ナフテン系けい炭たん化か水すい素そ

Meanings

1

noun

naphthenic hydrocarbon

Technical term used in organic chemistry and petroleum engineering for saturated cyclic hydrocarbons.

water

素elementary, principle, naked

パラフィン系けい炭たん化か水すい素そ
Refers to paraffinic (alkane) hydrocarbons, which are straight-chain or branched saturated hydrocarbons, in contrast to the cyclic structure of naphthenic hydrocarbons.
芳ほう香こう族ぞく炭たん化か水すい素そ
Aromatic hydrocarbons contain benzene rings and are unsaturated, unlike the saturated cyclic naphthenic hydrocarbons.

Compound of ナフテン (naphthene, from English 'naphthene') + 系 (system, series) + 炭化水素 (hydrocarbon).