α-Pinene Rich Bark Essential Oils ofZanthoxylum armatumDC. from Three Different Altitudes of Uttarakhand, India and their Antioxidant,in vitroAnti-inflammatory and Antibacterial Activity

Dhami, Anamika; Singh, Anmol; Palariya, Diksha; Kumar, Ravendra; Prakash, Om; Rawat, Deepa; Pant, A.K.

doi:10.1080/0972060x.2019.1630015

Cited by 34 publications

(6 citation statements)

References 43 publications

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“…The antioxidant efficacy of γ -terpinene, camphene and β -ocimene present in some essential oils has already been demonstrated by Negi et al in 2012 [ 43 ]. α-pinene and limonene may also be responsible for the antioxidant potential [ 44 ]. This would explain why greater activity was demonstrated by the extracts of essential oils of flowers compared to those of leaves.…”

Section: Resultsmentioning

confidence: 99%

Chemical Composition and Biological Activities of Prangos ferulacea Essential Oils

et al. 2022

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Prangos ferulacea (L.) Lindl, which belongs to the Apiaceae family, is a species that mainly grows in the eastern Mediterranean region and in western Asia. It has been largely used in traditional medicine in several countries and it has been shown to possess several interesting biological properties. With the aim to provide new insights into the phytochemistry and pharmacology of this species, the essential oils of flowers and leaves from a local accession that grows in Sicily (Italy) and has not yet been previously studied were investigated. The chemical composition of both oils, obtained by hydrodistillation from the leaves and flowers, was evaluated by GC-MS. This analysis allowed us to identify a new chemotype, characterized by a large amount of (Z)-β-ocimene. Furthermore, these essential oils have been tested for their possible antimicrobial and antioxidant activity. P. ferulacea essential oils exhibit moderate antimicrobial activity; in particular, the flower essential oil is harmful at low and wide spectrum concentrations. They also exhibit good antioxidant activity in vitro and in particular, it has been shown that the essential oils of the flowers and leaves of P. ferulacea caused a decrease in ROS and an increase in the activity of superoxide dismutase (SOD), catalase (CAT) and glutathione S-transferase (GST) in OZ-stimulated PMNs. Therefore, these essential oils could be considered as promising candidates for pharmaceutical and nutraceutical preparations.

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Section: Resultsmentioning

confidence: 99%

Chemical Composition and Biological Activities of Prangos ferulacea Essential Oils

et al. 2022

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“…In addition to the elevated levels of α-pinene and bicyclogermacrene associated with recovery following defoliation, enhanced levels of bioactive constituents such as 1,8-cineole and viridiflorol were also found to coincide with autumn harvest, irrespective of harvest intensity. Owing to these components, kunzea oil has been shown to exhibit several therapeutic properties, such as anti-inflammatory activity, fumigant toxicity and anti-bacterial activity [ 55 , 56 , 57 ]. Terpinen-4-ol has also been shown to confer strong antimicrobial activity [ 58 ], though this study revealed that levels of this component were constant in K. ambigua , irrespective of season.…”

Section: Discussionmentioning

confidence: 99%

The Effect of the Height of Coppicing and Harvest Season on the Yield and Quality of the Essential Oil of Kunzea ambigua

Park

Garland

2022

Plants

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Kunzea ambigua is a small shrub belonging to the Myrtaceae family and the leaves are steam-distilled to produce a therapeutically active essential oil. With production moving from wild-harvested to orchardised stands, there is a need for harvest management of kunzea oil. This study compared the regrowth, essential oil content and composition of kunzea plants after harvesting vegetative material to a depth of 0.2 m above ground level (shallow-cut), relative to plants cut to a depth of 0.1 m above ground level (deep-cut) over the 2018/2019 growing season. Increased vegetative biomass accounted for the increased oil yield and was caused by consistently higher growth rates of 50 to 60% across all seasons in shallow-cut crops relative to those subject to deep-cut. Total soluble sugar concentrations were higher in the leaves and lower in the roots of deep-cut treated plants compared to the other treatments, indicating defoliated K. ambigua responds by mobilising sugars into above-ground biomass. The overall essential oil content of leaves was constant regardless of season, though the oil yield for shallow-cut was 1.9-fold higher at 11.79 ± 0.23 g/m2 compared to deep-cut (6.24 ± 0.18 g/m2). An interactive effect of harvest intensity with season was recorded for all major components except for a non-significant effect of season on terpinen-4-ol. Bicyclogermacrene and α-pinene were elevated in both shallow- and deep-cut treatments relative to control (un-cut) in spring, possibly due to the plant defense response after de-foliation. The highest percentage of bioactive compounds (1,8-cineole and viridiflorol) were present in autumn. Therefore, the recovery of biomass post-harvest is optimised by shallow-cut harvests, and the profile of kunzea oil can be manipulated to elevate levels of specific bioactive components by selecting to crop in autumn/spring.

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“…This can be attributed to the fact that, DPPH, ABTS and reducing power tests are electron transfer reaction-based assays [54]. In fact, in the reducing power assay, the presence of reductants (antioxidants) terpenoids causes the reduction of the Fe 3+ or ferricyanide complex to its ferrous form [55]. As stated by Malecky [36], oxygen that has a number of oxidation (II) easily gives electrons during oxido-reduction reactions, while molecular oxygen is the final electron acceptor, important in reduction reactions.…”

Section: Antioxidant Activity Of Eo Samplesmentioning

confidence: 99%

“…As stated by Malecky [36], oxygen that has a number of oxidation (II) easily gives electrons during oxido-reduction reactions, while molecular oxygen is the final electron acceptor, important in reduction reactions. Thus, terpenes which have a low number of functional groups (hydroxyl and carbonyl) have a reduced activity in the reactions [55]. However, the antioxidant activity of the majority compounds tested separately gives lower results compared to the activity of the total EO [56].…”

Section: Antioxidant Activity Of Eo Samplesmentioning

confidence: 99%

Phytochemical Profile and In Vitro Antioxidant Properties of Essential Oils from Powder Fractions of Eucalyptus camaldulensis Leaves

Noumi¹,

Nguimbou²,

Tsague³

et al. 2021

AJPS

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Dried leaves of Eucalyptus camaldulensis were finely grinded and fractionated by sieving into four granulometric classes (<100 µm, 100 -200 µm, 200 -355 µm and >355 µm). The obtained powder fractions were used for essential oil (EO) extraction by hydrodistillation and their phytochemical profile and in vitro antioxidant activities were evaluated. The mother powder (unsieved powder) was used for comparison. Particle size exerted a significant influence (p < 0.05) on the phytochemical composition and in vitro antioxidant properties of the EOs. Comparatively, the mother powder had the highest contents of α-pinene (55.6%), camphene (3.4%) and limonene (3.7%), while 1,8-cineole (26.6% and 22.4%), exo-fenchol (5.6% and 3.5%), α-campholenol (4.2% and 3.4%), L-trans-pinocarveol (5.5% and 2.7%), L-borneol (12.6% and 6.8%) and α-terpineol (16.4% and 7.6%) are the main compounds of EOs from the <100 µm and 100 -200 µm fractions, respectively. The antioxidant activities of the EOs revealed higher radical-scavenging activities DPPH (90.62% and 70.46%) and ABTS (89.59% and 73.31%) for finer fractions (<100 µm and 100 -200 µm, respectively). The best reducing power (36.15% and 34.27%) were also found in these finer powder fractions which improved by more than 2 times the value of mother powder (reducing power of 17.01%). These results suggest that grinding followed by sieve fractionation concentrates the majority of antioxidant phytochemicals in the EOs of the finer powder fractions of E. camaldulensis leaves. Finer powders could be used as functional ingredients in food formulations for the management of chronic diseases.

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α-Pinene Rich Bark Essential Oils ofZanthoxylum armatumDC. from Three Different Altitudes of Uttarakhand, India and their Antioxidant,in vitroAnti-inflammatory and Antibacterial Activity

Cited by 34 publications

References 43 publications

Chemical Composition and Biological Activities of Prangos ferulacea Essential Oils

Chemical Composition and Biological Activities of Prangos ferulacea Essential Oils

The Effect of the Height of Coppicing and Harvest Season on the Yield and Quality of the Essential Oil of Kunzea ambigua

Phytochemical Profile and <i>In Vitro</i> Antioxidant Properties of Essential Oils from Powder Fractions of <i>Eucalyptus camaldulensis</i> Leaves

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α-Pinene Rich Bark Essential Oils ofZanthoxylum armatumDC. from Three Different Altitudes of Uttarakhand, India and their Antioxidant,in vitroAnti-inflammatory and Antibacterial Activity

Cited by 34 publications

References 43 publications

Chemical Composition and Biological Activities of Prangos ferulacea Essential Oils

Chemical Composition and Biological Activities of Prangos ferulacea Essential Oils

The Effect of the Height of Coppicing and Harvest Season on the Yield and Quality of the Essential Oil of Kunzea ambigua

Phytochemical Profile and &lt;i&gt;In Vitro&lt;/i&gt; Antioxidant Properties of Essential Oils from Powder Fractions of &lt;i&gt;Eucalyptus camaldulensis&lt;/i&gt; Leaves

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Phytochemical Profile and <i>In Vitro</i> Antioxidant Properties of Essential Oils from Powder Fractions of <i>Eucalyptus camaldulensis</i> Leaves