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Saturated terpenoid alcohols

Organic solvent-soluble components long-chained aliphatic saturated and unsaturated hydrocarbons terpenoid alcohols such as the duvanediols, phytosterols, phytol, and solanesol normal long-chained aliphatic alcohols esters of these groups of alcohols with long-chained aliphatic acids (palmitic, stearic, oleic, etc.)... [Pg.1116]

The chromane ring is derived from the diterpenic alcohol phytol, with the systematic name (2 ,7 ,11 )-3,7,11,15-tetramethylhexadec-2-en-l-ol, but in addition to the hydroxyl groups in position C-6 it contains another methyl group at position C-2. The presence of these functional groups is essential for the biological activity of all vitamers. Four forms of vitamin E with a saturated terpenoid side chain derived from the tocol are called tocopherols (5-33) four forms with unsaturated... [Pg.362]

The flavour properties of the citrus oils are based on compounds like aldehydes, esters and alcohols. Aldehydes play the most important role in citrus flavours. Mainly the saturated C-8, C-10 and C-12 long-chain constituents as well as the terpenoid aldehydes citral (a mixture of neral and geranial) and citronellal form the basic notes of the fresh and pleasant citms flavour. Also sesquiterpene aldehydes and ketones, such as sinensal or nootkatone, are significant for citms flavours. The aldehyde content, therefore, is frequently used as a quality criterion for citms oils. Important citms alcohols are linalool, octanol, a-terpineol (especially in distilled lime oil) and ter-pinen-4-ol. Furthermore, esters contribute to the flavour properties of citms oils. Especially the acetates of geraniol and nerol and, to a lesser extent, citronellol are... [Pg.188]

Working with orange juice vesicles. Potty and Bruemmer have isolated an enzyme, geraniol dehydrogenase, that maintains the equilibrium between aldehyde and alcohol. The presence of a second enzyme that saturates one of the double bonds in this system to citronellal and citronellol is inferred. The same authors have also demonstrated the presence of enzymes which convert mevalonate to linalyl pyrophosphate, suggesting that citrus fruits synthesise terpenoids from mevalonate by this route. [Pg.8]

Natural Waxes Waxes are solids at room temperature, but are not triglycerides. These are typically esters of fatty acids with fatty alcohols, sterols, terpenoids, or combination of these (22). Waxes will have a lower proportion (or none) of the components that are liquid at room temperature so that overall they are solid. They will tend to have a higher molecular weight, more saturation and higher rigidity of strucmre. [Pg.183]

For example, the essential oil of Anthemis nobilis L. is a mixture of terpenoids and saturated and unsaturated C4 and C5 acids esterified by saturated or unsaturated C3 to Cg alcohols. GC/MS with electron-impact ionization fails to distinguish the angelates and tiglates of unsaturated alcohols, whereas these geometric isomers have widely different characteristic frequencies in the infrared. The same holds for the distinction between crotonates and methacrylates or between linear and branched ethers. A further interesting example is the case of a-pinene and y-ter-pinene with very similar MS but sufficiently specific IR spectra. GC/FT-IR has been used to analyse a number of other essential oils, like the flavour components in kiwi, peppermint oil, lemon oil or the essential oil extracted from celery seed. An analogous task was the identification of 43 components in the headspace of coffee samples. [Pg.284]


See other pages where Saturated terpenoid alcohols is mentioned: [Pg.154]    [Pg.154]    [Pg.404]    [Pg.205]    [Pg.226]    [Pg.404]    [Pg.1112]    [Pg.213]    [Pg.10]    [Pg.1086]    [Pg.1237]    [Pg.233]    [Pg.23]    [Pg.142]    [Pg.890]    [Pg.521]    [Pg.380]    [Pg.10]   
See also in sourсe #XX -- [ Pg.12 ]




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