Stability of Essential Oils: A Review
TLDR
Focusing on individual essential oils, the various paths of degradation upon exposure to extrinsic parameters are outlined and temperature, light, and oxygen availability are recognized to have a crucial impact on essential oil integrity.Abstract:
In recent years, consumers have developed an ever-increasing interest in natural products as alternatives for artificial additives or pharmacologically relevant agents. Among them, essential oils have gained great popularity in the food, cosmetic, as well as the pharmaceutical industries. Constituting an array of many lipophilic and highly volatile components derived from a great range of different chemical classes, essential oils are known to be susceptible to conversion and degradation reactions. Oxidative and polymerization processes may result in a loss of quality and pharmacological properties. Despite their relevance for consumers, there is a paucity of information available addressing this issue. Therefore, the present review provides a comprehensive summary on possible changes in essential oils and factors affecting their stability. Focusing on individual essential oils, the various paths of degradation upon exposure to extrinsic parameters are outlined. Especially temperature, light, and oxygen availability are recognized to have a crucial impact on essential oil integrity. Finally, analytical methods to assess both genuine as well as altered essential oil profiles are evaluated with respect to their suitability to track chemical alterations. It is believed that only a careful inspection of essential oils by a set of convenient methods allows profound quality assessment that is relevant to producers and consumers alike.read more
Citations
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Essential Oils as Ecofriendly Biopesticides? Challenges and Constraints
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Botanical insecticides inspired by plant-herbivore chemical interactions
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References
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Essential oils: their antibacterial properties and potential applications in foods--a review.
TL;DR: In vitro studies have demonstrated antibacterial activity of essential oils (EOs) against Listeria monocytogenes, Salmonella typhimurium, Escherichia coli O157:H7, Shigella dysenteria, Bacillus cereus and Staphylococcus aureus at levels between 0.2 and 10 microl ml(-1).
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Biological effects of essential oils - A review
TL;DR: Findings suggest that, at least in part, the encountered beneficial effects of essential oils are due to prooxidant effects on the cellular level.
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Antimicrobial agents from plants: antibacterial activity of plant volatile oils.
H. J. D. Dorman,Stanley G. Deans +1 more
TL;DR: The volatile oils of black pepper, clove, and thyme exhibited considerable inhibitory effects against all the organisms under test while their major components demonstrated various degrees of growth inhibition.
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Plant essential oils for pest and disease management
TL;DR: The range of biological activities of essential oils and their constituents is reviewed, their toxicity and proposed mode-of-action in insects; their potential health and environmental impacts as crop protectants; and commercialization of pesticides based on plant essential oils are reviewed.
Journal ArticleDOI
Mechanisms and Factors for Edible Oil Oxidation
Eunok Choe,David B. Min +1 more
TL;DR: In this article, the authors studied the role of chlorophyll as a photosensitizer for the formation of 1O2; however, carotenoids and tocopherols decrease the oxidation through 1O 2 quenching.