Identified by the fact that drops applied to filter paper fatty oils leave a fat stain. Not nutrients, are solid lipids only melt at temperatures Is one substance
Combustibility (up to explosiveness)/more inclined Combustibility = characteristic of fatty oils, higher than fats do and are chemically more inert. Stimulates growth
To evaporate, intensely addressing themselves by smell. Insoluble in water and saponifiable Can’t be absorbed
Lighter as water Heavier as water
Do not melt or solidify Do not melt or solidify at a sharply defined Melts at certain high temp.
temperature but in a fusion interval. but in a fusion interval out of the range of life
Not nutrious, have pharmaceutical actions Nutrients Insoluble in water
Tending towards gaseous Fluid Solids Fluid - Solid
Made mainly in plant organism Made in plant organism/many Made mainly in plant organism Made in animal organism
Can dissolve waxes, resins, fats Is produced with light and heat of sun. In the dark
bones, structure of patients are weak. Has qualities related to origin in plant Shows not immediately
Is absorbed and changed in animal organism Is produced in human
Is foreign and modified organism and excreted
R.S.: The medicinal action of etheric oils (rosemary), consists in stimulation of the ego. Tannins make the astral body inclined to combine with the etheric body. Bitter substances stimulate the etheric body to take the astral body into itself.
[Nhlanhla Wiseman Nsele]
Terpenoids and Essential Oils
Plant fragrance is carried in the so-called essential oil component. These oils are secondary metabolites that are highly enriched in compounds based in isoprene structure (Marjorie, 1999). They are called terpenes and their general chemical structure is C10H16. If the compounds carry an additional element, usually oxygen, they are called terpenoids. Terpenoids are synthesised from acetate units and as such they share their origin with fatty acids (Marjorie, 1999). They differ from fatty acids in that they have extensive branching and they are cyclized. Some examples of
common terpenoids include methanol and Camphor (monoterpes), farnesol and Artemisin (sesquiterpenoids) (Marjorie, 1999).
Terpenoids are reported to be active against bacteria (Ahmed et al., 1993/Akpata and Akinrimisi, 1977). In 1977, it was reported that 60% of essential oil derivatives examined to date were inhibitory
to fungi while 30% inhibited bacteria (Chaurasia and Vyas, 1977). It is speculated that the mode of action of the terpenes revolves around the membrane disruption by the lipophilic compounds
(Marjorie, 1999). Food scientists have found the terpenoids present in essential oils of plants to be useful in the control of Listeria monocytogenes (Aureli and Zolea, 1992).
Terpenes are a class of hydrocarbons usually produced from plants. They are the building blocks of many essential oils used in perfumes and other fragrances.