What's the difference between terpene and xanthoxylene?

Terpene

Definition:

(n.) Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of turpentine, but including also certain hydrocarbons found in some essential oils.

Example Sentences:

(1) Cyclic terpenes were selected from the chemical classes of hydrocarbons (e.g., alpha-pinene), alcohols (e.g., alpha-terpineol), ketones (e.g., carvone), and oxides (e.g., 1.8-cineole, ascaridole).
(2) From the unsaponifiable fraction (63 g) of linseed oil (25 kg), two terpenic alcohols were isolated by alumina column, thin-layer, and gas-liquid chromatography.
(3) During growth on oat grain the production of 8-carbon alcohols and 3-methyl-1-butanol was higher and the production of terpenes was lower than during growth on agar substrates.
(4) Derivatives of camphor and terpenes have been identified in this particular river.
(5) The organisms were isolated on, and grew rapidly in, mineral salts medium containing the appropriate terpene substrates as sole carbon sources.
(6) These observations are compared with the results obtained with terpenic molecules which interact with mitochondrial respiration.
(7) The terpenes with hydrogen-bonding ability, however, only enhanced propranolol flux (at a level comparable to n-nonanol).
(8) The terpene PAF receptor antagonist BN52021 inhibited the action of PAF on [Ca2+]i. Voltage-dependent Ca2+ channel blocker, verapamil (200 microM), antagonized the action of PAF on [Ca2+]i as did chelation of extracellular Ca2+.
(9) Bakuchiol [17], a known prenylated phenolic terpene, was also isolated; its activity was not due to toxicity.
(10) The studies on isolated mitochondria showed a series of effects, starting with the disappearance of the respiratory control and deenergization of the organelles and followed by an inhibition of respiration at higher concentrations of the terpene.
(11) To improve oral litholysis: 1) UDCA was combined with the amino acid taurine, 2) CDCA and UDCA were administered in a single bedtime dose, 3) they were combined, each bile acid in half dosage, and 4) they were mixed with terpenes.
(12) The terpenes prolonged nucleation time from 2.8 to 5.8 days (one capsule; P less than 0.05) and to 9.5 days (two capsules; P less than 0.001), respectively; but nucleation did not occur in seven controls.
(13) Samples collected from 50 mL of ambient air at 87 K (liquid argon) are injected without use of a valve into a silica capillary column which is then temperature programmed from -30 degrees C to 180 degrees C. Hydrocarbons (4 to 10 carbons) as well as carbonyl compounds, chlorinated compounds and terpenes can be identified and quantified.
(14) These results support previous findings suggesting that hydroxylation of the terpene portion of the delta 9-THC molecule significantly reduces intraocular pressure lowering activity.
(15) The problems connected with the measurement of hydrocarbons outside urban areas are considerable: The atmospheric mixing ratios of most of the hydrocarbons are very low--from a few ppb down to some ppt; the mixture of hydrocarbons is extremely complex, ranging from light n-alkanes to alkyl benzenes and terpenes; for measurements in remote areas the logistic conditions often restrict the instrumentation which can be used for sample collection or in situ measurements (such as lack of electric power supply, weight restrictions etc.).
(16) Inhibitors included sulfhydryl reactive compounds, terpene epoxides, and pinane derivatives with substituent groups at carbon 3.
(17) However, rat liver microsomal acyl-CoA:retinol acyltransferase activity was inhibited by the terpene ester.
(18) The content of n-isoalkans, isoprenoids, monocycloparaffins, bi-and tricyclic naphthenes, steranes and terpenes, olifines, squalene and other polyenes in sunflower, cotton, soya oils and oilcakes was measured.
(19) The genotoxicity of the terpene beta-myrcene was evaluated in mammalian cells in vitro.
(20) Both are terpenes, which are derived by assembly of isoprene units.