scholarly journals Microwave-Assisted Techniques (MATs); a Quick Way to Extract a Fragrance: A Review

2013 ◽  
Vol 8 (10) ◽  
pp. 1934578X1300801 ◽  
Author(s):  
Antonios K. Kokolakis ◽  
Spyridon K. Golfinopoulos
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Process Design ◽  
Chromatographic Analysis ◽  
Plant Material ◽  
Antioxidant Properties ◽  
Product Yield ◽  
Heating Source ◽  
Microwave Assisted ◽  
New Process

In recent years Microwave-Assisted Techniques (MATs) have been introduced as a new process design and operation for essential oils extraction, representing a viable alternative to conventional old-type methods of distillation which are routinely used for the isolation of essential oils from herbs, flowers and spices prior to gas chromatographic analysis. The novelty of the technique lies in a microwave heating source generating a mixture of boiling solvent with the raw plant material settled above (or drenched inside). Several variations of distillation techniques are evaluated in terms of substantial energy saving, rapidity, product yield, cleanliness and product quality. Results confirm the effectiveness of MATs, which allow extraction of essential oils in shorter extraction time (up-to 9 times faster), using “greener” procedures and provide a higher quality essential oil with better sensory and antioxidant properties.

scholarly journals Microwave-Assisted Isolation of Essential Oils from Nepeta Crispa and N. Racemosa and Comparisons with the Conventional Method

2012 ◽  
Vol 7 (11) ◽  
pp. 1934578X1200701 ◽  
Author(s):  
Ameneh Porgham Daryasari ◽  
Mojtaba Soleimani ◽  
Azam Ghorbani ◽  
Homayon Kheiri ◽  
Mohammad Porgham Daryasari
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Conventional Method ◽  
Plant Material ◽  
Oxygenated Compounds ◽  
Microwave Assisted

In this study microwave-assisted hydrodistillation (MAHD) has been compared with the conventional method of hydrodistillation for the extraction of the essential oils from two Iranian Lamiaceae species: Nepeta crispa Willd and N. racemosa Lam. The essential oils extracted by MAHD for 40 min were quantitatively and qualitatively (aromatic profile) similar to those obtained by conventional hydrodistillation for 3.5 h. The MAHD method yields an essential oil with higher amounts of more valuable oxygenated compounds, and allows substantial savings of costs in terms of time, energy and plant material.

Contribution to the Optimization of a Gas Chromatographic Method by QbD Approach used for Analysis of Essential Oils from Salvia officinalis

2019 ◽  
Vol 70 (6) ◽  
pp. 2015-2020
Author(s):  
Silvia Robu ◽  
Aurelia Romila ◽  
Olimpia Dumitriu Buzia ◽  
Adrian Florin Spac ◽  
Camelia Diaconu ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Plant Material ◽  
Mobile Phase ◽  
Chromatographic Method ◽  
Salvia Officinalis ◽  
Salvia Officinalis L ◽  
Gas Chromatographic Method

Numerous articles on Salvia officinalis L. have been published regarding the composition of their essential oil. The considerable variation found may be due to the quality of the plant material as well as to the methods used for analysis. A simple GC-MS method was developed and optimized in the QbD approach, for the determination of sage essential oils. The optimization of GC-MS analysis was performed using different mobile phase flows, injection volumes, split ratios and temperature programs. The optimized method proved to be simple and can be successfully applied for the determination of sage essential oils.

Chemical variability and antioxidant activities of the essential oils of the aerial parts of Ammoides verticillata and the roots of Carthamus caeruleus and their synergistic effect in combination

2020 ◽  
Vol 23 ◽  
Author(s):  
Imane Rihab Mami ◽  
Noria Merad-Boussalah ◽  
Mohammed El Amine Dib ◽  
Boufeldja Tabti ◽  
Jean Costa ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Natural Food ◽  
Chemical Compositions ◽  
Chemical Variability ◽  
Ammoides Verticillata

Aim and Objective: Oxidative stress is implicated in the development and progression of many disease. Some of appropriate actions that could be initiated to taken to resolve the problem of these diseases are search for new antioxidant substances isolated from plants. The aims of this study were to study the intraspecies variations of A. verticillata and C. caeruleus essential oils from 8 locations using statistical analysis, the in vitro antioxidant properties of collective essential oils and in combinations. Materials and Methods: The essential oils were analyzed by GC and GC-MS. The intraspecies variations of the essential oil compositions were discussed using principal component analysis (PCA) and cluster analysis (CA). The antioxidant properties were evaluated DPPH-radical scavenging activity and β-carotene bleaching test. Results: The main components of Ammoides verticillata collective essential oil (Coll EO) were thymol (30.5%), carvacrol (23.2%), p-cymene (13.1%), limonene (12.5%) and terpinene-4-ol (12.3%). While roots of Carthamus caeruleus essential oil were dominated by carline oxide (86.2%). The chemical variability allowed the discrimination of two main Groups for both Coll EOs. A direct correlation between the altitudes, climate and the chemical compositions was evidenced. Ammoides verticulata and Carthamus caeruleus Coll Eos showed good antioxidant activity. In binary mixture, the interaction both Coll Eos and between oils rich of thymol and/or carvacrol with carlina oxide produced the best synergistic effects, compared to individual essential oils and the synthetic antioxidant (BHT). Conclusion: Ammoides verticillata and Carthamus caeruleus essential oil blends can be used as a natural food preservative and alternative to chemical antioxidants.

Phytochemical Screening And Evaluation Of The Antioxidant Activity Of Essential Oil Of Pistacia Atlantica Harvested From The Ouled Brahim Region, Saida; Algeria

2019 ◽  
Vol 8 (6) ◽  
pp. 202-206
Author(s):  
Attou Fatima ◽  
Terras Mohamed ◽  
Ammam Abdelkader ◽  
Tabet Aouel Faiza
Keyword(s):  
Antioxidant Activity ◽  
Essential Oil ◽  
Essential Oils ◽  
Plant Material ◽  
Local Population ◽  
Traditional Healers ◽  
Phytochemical Screening ◽  
Traditional Use ◽  
Phytochemical Study ◽  
Antioxidant Power

The knowledge of traditional healers o en represents a basis for the pharmacological and phytochemical inves ga on of naturals medicaments. This work aims for the phytochemical study and evaluation of the antioxidant activity of essential oils of medicinal plant Pistacia atlantica.Through the results obtained, it appears that the leaves are rich in substances with a high antioxidant power. For essential oils, it is 0.24 % for 100 g of plant material. And the phytochemical screening of the plant showed the presence of tannins, resins, coumarins, terpenoids and  flavonoids, and absence of saponins. The strong antioxidant activity of extracts obtained only confirms the traditional use of this plant by the local population.

scholarly journals Volatile Compounds and Antioxidant and Antimicrobial Activities of Selected Citrus Essential Oils Originated from Nepal

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6683
Author(s):  
Devi Prasad Bhandari ◽  
Darbin Kumar Poudel ◽  
Prabodh Satyal ◽  
Karan Khadayat ◽  
Sital Dhami ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Citrus Sinensis ◽  
Antioxidant Properties ◽  
Antimicrobial Activities ◽  
Gas Chromatography Mass Spectrometry ◽  
Diffusion Method ◽  
Citrus Species ◽  
Citrus Peel ◽  
Antioxidant And Antimicrobial Activities

Citrus species of plants are among the most commercially cultivated crops, mainly for their fruit. Besides, the generally consumed flesh inside the fruit, the peel is quite important too. Essential oils extracted from the peel have a history of being used by humankind for centuries. These essential oils are rich in antioxidants and antimicrobial agents. Comparative investigation of volatile constituents, and antioxidant and antimicrobial activities were undertaken. The essential oils were evaluated through gas chromatography-mass spectrometry (GC–MS), and enantiomeric composition by chiral GC–MS. Similarly, the antioxidant properties were evaluated by 2,2-diphenyl-1-picrylhydrazyl scavenging assay, and antimicrobial activities were assayed using the disk diffusion method. The highest extraction yield of 1.83% was observed in Citrus sinensis Osbeck. GC–MS analysis showed limonene (63.76–89.15%), γ-terpinene (0.24–6.43%), β-pinene (0.15–6.09%), linalool (0.35–3.5%), sabinene (0.77–2.17%), myrcene (0.74–1.75%), α-terpineol (0.28–1.15%), and α-pinene (0.2–0.58%) as the major constituents of the essential oil of the Citrus species studied. For the first time, through our study, chiral terpenoids have been observed from Citrus grandis Osbeck essential oil. The order of antioxidant activity is as follows: Citrus grandis Osbeck red flesh > Citrus reticulata Blanco > Citrus sinensis Osbeck > Citrus grandis Osbeck white flesh. Except for Citrus grandis Osbeck white flesh (52.34 µL/mL), all samples demonstrated stronger antioxidant activities than those of the positive control, quercetin (5.60 µL/mL). Therefore, these essential oils can be used as a safe natural antioxidant to prevent product oxidation. Likewise, citrus peel essential oil showed antimicrobial activity against tested bacterial strains, albeit marginal.

scholarly journals Application of Response Surface Methodology for the Optimization of Essential Oils from Pomelo [Citrus grandis (L.) Osbeck] Leaves using Microwave-Assisted Hydrodistillation Method

2019 ◽  
Vol 31 (8) ◽  
pp. 1639-1642 ◽  
Author(s):  
TAN PHAT DAO ◽  
THIEN HIEN TRAN ◽  
Duy Trinh Nguyen ◽  
Duy Chinh Nguyen ◽  
Dai Hai Nguyen ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Essential Oil ◽  
Essential Oils ◽  
Response Surface ◽  
Favourable Outcome ◽  
Quadratic Model ◽  
P Value ◽  
Microwave Assisted ◽  
New Methods ◽  
Essential Oil Yield

Pomelo leaves oil has many applications regarding hair nourishment and stimulation. Recently, new methods of extracting essential oil used have been increasingly developed to replace traditional methods. In this research, maximization of essential oils yield from Citrus grandis was studied by the combination of microwave assisted hydro-distillation (MAHD) and response surface methodology (RSM). We found that the maximum essential oil yield was 0.3197 % with 91.3 % desirability corresponding to factors such as material and water ratiosof 3.04:1, extraction time at 62.76 min and microwave power of 482.17 W. ANOVA analysis for quadratic model also gives favourable outcome including the high determination coefficient (R2 = 0.9443), significant F-value and p-value of coefficients. All these values indicate that this model is significant between experimental and predicted variables.

scholarly journals Two Distinct Essential Oil Bearing Races of Tanacetum nubigenum Wallich ex DC from Kumaon Himalaya

2007 ◽  
Vol 2 (7) ◽  
pp. 1934578X0700200 ◽  
Author(s):  
Chandan S. Chanotiya ◽  
Chandra S. Mathela
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Plant Material ◽  
2D Nmr ◽  
Bornyl Acetate ◽  
2D Nmr Spectroscopy ◽  
Aerial Parts ◽  
Kumaon Himalaya ◽  
Linalool Oxide ◽  
Total Oil

The essential oil from the aerial parts of Tanacetum nubigenum Wallich ex DC collected from the Milam glacier moraine showed the presence of 73 compounds, of which 69, representing 87.9% of the total oil, have been identified, with bornyl acetate (39.7%), borneol (10.6%), ( E)-β-farnesene (6.6%) and 1,8-cineole (5.8%) as major constituents, while the oil from the plant material from the Pindari glacier area contained a total of 81 compounds, of which 77 have been identified. This oil was characterized by the presence of (3 R, 6 R)-linalool oxide acetate (69.4%), β-eudesmol (3.2%), selin-11-en-4α-ol (3.2%) and (3.2% and 1.2%, respectively) for compounds ( E) and ( Z)-2-(2,4-hexadiynylidene)-1,6-dioxospiro [4,4] non-3-ene, respectively. The major constituents of the essential oils from the aerial parts were separated and characterized by GC, GC/MS and 1D- and 2D-NMR spectroscopy. The chemical differences between the two essential oils place them as distinct chemical races or chemotypes.

scholarly journals COMPARATIVE STUDY OF DIFFERENT ROSEMARY ESSENTIAL OIL

1970 ◽  
Vol 63 ◽  
Author(s):  
Sonia A. Socaci ◽  
Maria Tofana ◽  
Carmen Socaciu ◽  
D. Varban ◽  
Sevastita Muste
Keyword(s):  
Essential Oil ◽  
Comparative Study ◽  
Essential Oils ◽  
Plant Material ◽  
Chemical Constituents ◽  
Rosemary Essential Oil

The present study includes researches regarding the composition of different varieties of rosemary essential oil. The essential oils were extracted from the plant material using the hydrodistillation technique. The analyses of the composition of essential oils were carried out by using a GC-MS system. The chemical constituents of the essential oil were separated and identified using the GC-MS NIST libraries.

Terpenoid chemistry. XVII. ( - )-Ngaoine, a toxic constituent of Myoporum deserti. The absolute configuration of ( - )-Ngaione

1970 ◽  
Vol 23 (1) ◽  
pp. 107 ◽  
Author(s):  
BF Hegarty ◽  
JR Kelly ◽  
RJ Park ◽  
MD Sutherland
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Plant Material ◽  
Sodium Acetate ◽  
Active Form ◽  
Optically Active ◽  
Unsaturated Ketone ◽  
Unsaturated Ketones ◽  
Chemical Race ◽  
Toxic Constituent

Varieties of the shrub Myoporum deserti A. Cunn. (Ellangowan poison bush), which causes heavy losses of stock in inland Australia, yield at least nine different essential oils, most of which are toxic. One oil from plant material of the Longreach chemical race from Blackall, Clermont, Hannaford, Longreach, Meandarra, Moree, and Roma contains the toxic furanoid sesquiterpene ketone, (-)-ngaione, as the principal constituent while two others (the Mitchell and the Blackall races) contain lesser proportions of ngaione. (-)-Ngaione comprises over half of the essential oil of a "greenish leaf" variety of Eremophila latrobei F. Nuell. and a low proportion of the oil of a "silver leaf" variety of the same species. The trans isomer of ngaione [(-)-epingaione], present in low concentration in some of these essential oils, is formed from ( -)-ngaione during fractional distillation or more rapidly by base-catalysed epimerization. "Isongaione acetate" prepared from (-)-ngaione by treatment with acetic anhydride-sodium acetate is shown to be a mixture of a, β- and β, γ-unsaturated ketones and obtainable in optically active form contrary to literature statements. Oxidation of the optically active β,γ-unsaturated ketone yields (-) acetylmalic acid from which it follows that (-)-ngaione is l(S),4(R)-β-(4,8-dimethyl-6-oxo-1,4-epoxynonyl)furan, ipomeamarone is the 1(R),4(S) enantiomer, and (-)-epingaione is the 1(S),4(S) isomer.

Insight into the antioxidant properties of non-phenolic terpenoids contained in essential oils extracted from the buds of Cleistocalyx operculatus: a DFT study

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 30824-30834 ◽  
Author(s):  
Thi Chinh Ngo ◽  
Duy Quang Dao ◽  
Nguyen Minh Thong ◽  
Pham Cam Nam
Keyword(s):  
Density Functional Theory ◽  
Essential Oil ◽  
Essential Oils ◽  
Computational Methods ◽  
Density Functional ◽  
Antioxidant Properties ◽  
Dft Study ◽  
Functional Theory ◽  
Cleistocalyx Operculatus ◽  
Insight Into

The antioxidant properties of 21 non-phenolic terpenoids contained in essential oil extracted from the buds of Cleistocalyx operculatus have been investigated using density functional theory (DFT)-based computational methods.

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