Essential oil constituents of the genus Zieria

Flynn, Terence M.; Southwell, Ian A.

doi:10.1016/s0031-9422(00)82268-2

Cited by 22 publications

(5 citation statements)

References 20 publications

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“…The percent degrada tion of the terpenes (estimated by GC on the reaction mixtures) and the length of heating time at 120 °C were as follows: α-terpinene, 100% in 4 h; limonene, 50% in 24 h; Δ 3 -carene, 7% in 24 h and 36% in 72 h; and, camphene, 38% in 72 h. Although none of the degradation products identified were new compounds, many of them had not been reported as thermal degradation products of the respective terpenes, being generated instead in smog chamber studies by various oxidizing agents or isolated as natural products themselves. The products isolated from the thermal degradation of Δ 3 -carene are examples of this ( − ).…”

Section: Resultsmentioning

confidence: 99%

Thermal Degradation of Terpenes: Camphene, Δ³-Carene, Limonene, and α-Terpinene

McGraw

Hemingway

Ingram

et al. 1999

Environ. Sci. Technol.

117

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Emissions from wood dryers have been of some concern for a number of years, and recent policy changes by the Environmental Protection Agency have placed emphasis upon the gaseous emissions that lead to the formation of particulate matter as small as 2.5 μm diameter. In this qualitative study, camphene, Δ3-carene, limonene, and α-terpinene were thermally degraded in the presence of air to determine the number and kind of oxidative degradation products that might be expected under drying conditions used in processing wood products. Various chromatographic methods were used to isolate the products for proof of structure by NMR and/or GC−MS. The degradation products resulted from dehydrogenations, epoxidations, double bond cleavages, allylic oxidations, and rearrangements. A number of compounds not previously associated with the thermal degradation of these terpenes were identified.

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Section: Resultsmentioning

confidence: 99%

Thermal Degradation of Terpenes: Camphene, Δ³-Carene, Limonene, and α-Terpinene

McGraw

Hemingway

Ingram

et al. 1999

Environ. Sci. Technol.

117

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“…Recently, it has been reported that chrysanthenyl acetate has an indirect antioxidant activity, increasing the activity of antioxidant enzymes [129]. Apart from members of the Tanacetum genus [130][131][132][133][134], it also occurs in high concentrations in species such as Anthemis maritime [135], Lamium amplexicalule [136], Zieria cytisoides [137], and Allium neapolitanum [138]. A content of 100% (E)-chrysanthenyl acetate was reported in oil obtained from Anthemis secundiramea Biv.…”

Section: Discussionmentioning

confidence: 99%

A Comparison between Bulgarian Tanacetum parthenium Essential Oil from Two Different Locations

Lechkova,

Benbassat,

Karcheva-Bahchevanska

et al. 2024

Molecules

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Tanacetum parthenium L. (Asteraceae) is a perennial herbaceous plant with a long-standing historical use in traditional medicine. Recently Tanacetum parthenium L. essential oil has been associated with a promising potential for future applications in the pharmaceutical industry, in the cosmetics industry, and in agriculture. Investigations on the essential oil (EO) have indicated antimicrobial, antioxidant, and repellent activity. The present study aimed to evaluate the chemical composition of Bulgarian T. parthenium essential oil from two different regions, to compare the results to those reported previously in the literature, and to point out some of its future applications. The essential oils of the air-dried flowering aerial parts were obtained by hydrodistillation using a Clevenger-type apparatus. The chemical composition was evaluated using gas chromatography with mass spectrometry (GC-MS). It was established that the oxygenated monoterpenes were the predominant terpene class, followed by the monoterpene hydrocarbons. Significant qualitative and quantitative differences between both samples were revealed. Camphor (50.90%), camphene (16.12%), and bornyl acetate (6.05%) were the major constituents in the feverfew EO from the western Rhodope Mountains, while in the EO from the central Balkan mountains camphor (45.54%), trans-chrysanthenyl acetate (13.87%), and camphene (13.03%) were the most abundant components.

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“…During the years of chemotaxonomy, the efforts to recognise chemical fingerprints across species within the genus Zieria were thwarted by intraspecific chemotypes. For example, Zieria smithii Jacks., is made up of at least five chemotypes that are predominantly phenylpropanoid, except for the chrysanthenyl acetate type [130][131][132]. However, there are examples of chemical convergence for morphologically similar species, such as Z. floydii J.A.Armstr., which is morphologically like Z. furfuracea R.Br.…”

Section: Zieria (Rutaceae)mentioning

confidence: 99%

Purely Australian Essential Oils Past and Present: Chemical Diversity, Authenticity, Bioactivity, and Commercial Value

Sadgrove

2022

Diversity

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In this comprehensive commentary, Australian essential oils and their components are listed and discussed in the context of their value to industry and aesthetics. The historic and cultural significance of endemic essential oils is explained. Several promising candidates are identified that have commercial potential and will enter the marketplace in the not-too-distant future. This text elaborates on the current progress in research, and explains the up-to-date view of ‘bioactive,’ with reference to insect repellence, antimicrobial activity, anti-inflammatory activity, and potential toxicity. The concept of chemotypes and chemophenetics is explained in detail to justify why chemically variable species in Australia require standardisation practices to ensure reproducibility of their derived natural products: standardisation practice includes cultivar development and authentication protocols. Thereafter, some of the more significant essential oils are defined and some background information provided. This review concludes with a comprehensive table of aromatic species that were studied by Joseph Brophy over the last 30 years, thereby providing the most comprehensive overview available, on the chemistry of Australian essential oil yielding species.

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Essential oil constituents of the genus Zieria

Cited by 22 publications

References 20 publications

Thermal Degradation of Terpenes: Camphene, Δ³-Carene, Limonene, and α-Terpinene

Thermal Degradation of Terpenes: Camphene, Δ³-Carene, Limonene, and α-Terpinene

A Comparison between Bulgarian Tanacetum parthenium Essential Oil from Two Different Locations

Purely Australian Essential Oils Past and Present: Chemical Diversity, Authenticity, Bioactivity, and Commercial Value

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Essential oil constituents of the genus Zieria

Cited by 22 publications

References 20 publications

Thermal Degradation of Terpenes: Camphene, Δ3-Carene, Limonene, and α-Terpinene

Thermal Degradation of Terpenes: Camphene, Δ3-Carene, Limonene, and α-Terpinene

A Comparison between Bulgarian Tanacetum parthenium Essential Oil from Two Different Locations

Purely Australian Essential Oils Past and Present: Chemical Diversity, Authenticity, Bioactivity, and Commercial Value

Contact Info

Product

Resources

About

Thermal Degradation of Terpenes: Camphene, Δ³-Carene, Limonene, and α-Terpinene

Thermal Degradation of Terpenes: Camphene, Δ³-Carene, Limonene, and α-Terpinene