Besides, despite the low concentration of hydrocarbon monoterpenes
(1.8%) and oxygenated monoterpenes
(1.2%) in the essential oil of P.
A review on anti-inflammatory activity of monoterpenes
. Molecules 2013;18:1227-54.
Linalool and 4-terpineol are terpenoid alcohols of the monoterpene
Cyclization of an acyclic monoterpene
to the iridane skeleton may involve a double Michael-type addition of geranyl pyrophosphate to yield iridodial [27-28].
Table 1: Phytochemical screening result Compound Ethanolic extract Alkaloids (+) Polyphenols (+) Flavonoids (+) Tannins (-) Monoterpenes
and (+) Sesquiterpenes (+) Steroid and (+) Triterpenoid (+) Quinones (+) Saponins (-) (+): Detected, (-): Not detected Table 2: Antibacterial activity result Extract concentration (%w/v) Inhibition diameter (cm) 60 1.539 40 1.166 20 0.935 10 (-) (-): No inhibition Table 3: MIC and MBC results Extract concentration (% w/v) Bacterial growth 20 (-) 18 (-) 16 (-) 14 (-) 12 (+) 10 (+) (+): Presence, (-): Absence.
Xu, L., and Coauthors, 2015a: Effects of anthropogenic emissions on aerosol formation from isoprene and monoterpenes
in the southeastern United States.
Major selected monoterpenes
alpha-pinene and 1,8-cineole found in Salvia lavandulifolia (Spanish sage) essential oil as regulators of cellular redox balance.
The high concentration of monoterpenes
, which provide character of apricots, peaches, roses, passion fruit and pears, is provided by sufficient exposure to sunlight.
annua with monoterpenes
being principal constituents  that contribute to the characteristic fragrance of this medicinal species.
With the further analysis of the GS-MS results, it was found that the essential oil contained a plenty of monoterpenes
and sesquiterpenes, and their contents accounted for 27.0% and 21.3% of the essential oil, respectively.
To make the discussion of this section easier to follow, the volatile compounds have been grouped in eight chemical families: (i) monoterpenes
(14 compounds), (ii) monoterpenoids (13), (iii) aldehydes (13), (iv) sesquiterpenes (11), (v) esters (9), (vi) alcohols and ketones (2), (vii) lineal hydrocarbons (1), and (viii) phenol derivatives (1).
Perhaps its most powerful punch, however, comes from monoterpenes
and flavonoids, two health-protective components.