Moore, James Alexander Formerly, Department of Chemistry, University of Delaware, Newark, Delaware.
Last reviewed:January 2019
Show previous versions
- Characterization and analysis
- Variability from plant sources
- Links to Primary Literature
- Additional Readings
Volatile, fragrant oils obtained from plants. Essential oils are distinguished from those known as fixed oils, which are mainly triglycerides of fatty acids. Essential oils have been obtained from thousands of plants (Fig. 1) and are designated and defined by the plant species and sometimes the geographical location. The sources of these oils are diverse, including flower petals (for example, rose and jasmine), spices (for example, cinnamon and ginger), pine oil and turpentine, and citrus fruit peels. Compounds present in the juice that may contribute to the distinctive flavor of a fruit or berry are not, strictly speaking, components of the essential oil. Chemically, essential oils are extremely complex mixtures containing compounds of every major functional group class. The oils are isolated by steam distillation, extraction, or mechanical expression of the plant material; often, only certain parts, such as roots, buds, leaves, or flower petals, are used. See also: Distillation; Extraction; Fat and oil; Pharmacognosy
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information