monoterpene


Also found in: Dictionary, Encyclopedia, Wikipedia.
Related to monoterpene: Sesquiterpene, diterpene

monoterpene

Any of a number of substances (e.g., limonene, perillyl alcohol) that consist of two isoprene units and have the molecular formula C10H16. They are major components of essential oils, are found in fruits, vegetables and other plants, and have antioxidant and carcinopreventive activity.
 
Monoterpenes induce the expression of phase-I and -II hepatic detoxification enzymes, selectively inhibit protein isoprenylation (which targets proteins to membrane) and induce expression of the mannose G phosphate/IGF-II receptor and TGF-beta.

monoterpene (mäˈ·n·terˑ·pēn),

n a member of the terpene group; comprises two units of isoprene that are linked by two carbon atoms with a single bond. Its molecular formula is C10H8. It has been used as an antiseptic, stimulant, analgesic, decongestant, and expectorant.
References in periodicals archive ?
monoterpenes, phenolics and sesquiterpene lactones) can disrupt cellular function (Wink 2008, Forbey et al.
1,4-Cineole, a monoterpene cyclic ether, is known to be a major flavor constituent of lime (Citrus aurantiifolia) and Eucalyptus polybractea.
Isoprene and monoterpene emission was also significantly affected by leaf position (Table 2).
Thus, the fact that the essential oils studied did not show significant antioxidant activity can be explained; the oil is composed almost entirely of monoterpenes, especially monoterpenes hydrocarbons.
Component RI RI number (a) (b) Unsaturated terpene 1 Santene 888 902 Monoterpene hydrocarbons 2 Tricyclene 926 934 3 [alpha]-Pinene 939 946 4 Camphene 954 959 5 [beta]-Pinene 979 980 6 3-Carene 1011 1013 7 D-Limonene 1021 1018 8 [gamma]-Terpinene 1059 1064 9 4-Carene 1128 1131 Oxygenated monoterpenes 10 Linalyl formate 1216 1218 11 [beta]-Fenchyl acetate 1232 1234 12 Bornyl acetate 1285 1286 13 [alpha]-Terpinyl acetate 1349 1356 14 Geranyl acetate 1365 1368 Sesquiterpene hydrocarbons 15 Isoledene 1376 1380 16 Caryophyllene 1419 1412 17 [alpha]-Humulene 1454 1460 18 [gamma]-Gurjunene 1477 1481 Oxygenated sesquiterpenes 19 Nerolidol 1563 1565 20 Selina-6-en-4-ol 1624 1625 21 [beta]-Eudesmol 1650 1652 22 Eudesm-7(11)-en-ol 1666 1670 23 [alpha]-Bisabolol 1685 1689 Total S.
Most oil contained significantly higher monoterpenes than sesquiterpene, except oil from medium depth peatland where amount of sesquiterpenes slightly higher (38.
Isoprene and monoterpene emission rate variability: observations with Eucalyptus and emission rate algorithm development.
Although a complete pathway for the degradation of larger xenobiotic tertiary alcohols might not exist, partial metabolic sequences at least adapted to monoterpene conversion have been detected in a few bacterial strains.