Geraniol (G) is an acyclic monoterpene
derived from the mevalonate pathway (MP) in plants, but not produced in mammals.
00 Table 3: Classification of Secondary Metabolite Type of chemical Shallow Peatland and amount (%) Buntoi Bukit Maliku Keminting Monoterpene
It has been reported that monoterpene
indole alkaloids and strictosamide (alkaloid glycoside), besides being important as chemotaxonomic markers for the taxonomy of the species of this genus (Simoes-Pires et al.
Anemiaceae, essential oil, monoterpenes
, sesquiterpenes, fern
This genus including some Iranian species has been studied chemically and present of monoterpenes
(16), sesquiterpenes (17,18), especially sesquiterpene lactones (19,20) and essential oils (21-25) were reported.
Furthermore, fast deterioration of monoterpenes
hydrocarbons, such as the sabinene; 1,8 cineole, and [alpha]-pinene; as well as the alcoholic compounds, are due to a high speed of the oxidization of these essential oils .
Among terpenes, the most widespread are the monoterpenes
[alpha]-pinene and limonene (Mariaca et al.
High antimicrobial activity of the essential oils of thyme is also characterized by a high content of monoterpenes
, such as hydrocarbons [gamma]-terpinene and [beta]-cymene .
The variations in the toxicity of crude extract and essential oil against different mosquito species are not uncommon (6), due to qualitative and quantitative variations of constituents like monoterpenes
, saponins, phytosterols, phenols, flavonoids and tannins in the crude extract and essential oil composition.
Because essential oils are volatile, our objectives were to determine if 1) odour plays a role in the food choice by moose, 2) whether single monoterpenes
act as feeding deterrents, and 3) if this might be a mechanism used to discriminate against unpalatable plants.
The protective effect of essential oils is assigned to the presence of phenolic monoterpenes
, thymol and carvacrol, which are identified as the dominant compounds in these essential oils.
A number of these dietary monoterpenes
have antitumor activity.