EFFECTS OF GROWTH CONDITION AND THE DEVELOPMENT STAGE OF TWO TUNISIAN VARIETIES OF ROSMARINUS OFFICINALIS L. ON THE ESSENTIAL OIL YIELD AND ITS CHEMICAL COMPOSITION

2010 ◽  
pp. 149-156
Author(s):  
A. Ben Arfa ◽  
M. Neffati
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Growth Condition ◽  
Development Stage ◽  
Rosmarinus Officinalis ◽  
Oil Yield ◽  
Rosmarinus Officinalis L ◽  
Essential Oil Yield

scholarly journals Chemotyping the Essential Oil in Different Rosemary (Rosmarinus officinalis L.) Plants grown in Kashmir Valley

2017 ◽  
Vol 14 (3) ◽  
pp. 1025-1031 ◽  
Author(s):  
Tawheed Amin ◽  
H. R. Naik ◽  
Syed Zameer Hussain
Keyword(s):  
Gas Chromatography ◽  
Essential Oil ◽  
Chemical Constituents ◽  
Rosmarinus Officinalis ◽  
Oil Yield ◽  
Kashmir Valley ◽  
Plant Samples ◽  
Rosmarinus Officinalis L ◽  
Essential Oil Yield

ABSTRACT: The Aim of the Present Study Was to Evaluate the Yield, Chemical Constituents and Determine the Chemotype of the Essential Oil Obtained from Different Rosemary Plants Growing in Different Accessions of Rosemary Fields. About four Plant Samples Were Analyzed for Essential Oil Yield and the Essential Oil Yield Varied from 0.88% To 1.2%. the Essential Oil Samples Were Further Analyzed by Gas Chromatography (GC) for the Purpose of Identification of Chemical Constituents Present in Them. It Was Contended from the Results That the Selected Plants Differed from Each Other in Terms of Chemical Constituents.Camphor Content Was Foundin Higher Amount in All the Foursamples, Thus it Could Be Inferred That the Plants Are Camphor Chemotype.

Variation of Malva sylvestris essential oil yield, chemical composition and biological activity in response to different environments across Southern Italy

2017 ◽  
Vol 98 ◽  
pp. 29-37 ◽  
Author(s):  
Sebastiano Delfine ◽  
Mariangela Marrelli ◽  
Filomena Conforti ◽  
Carmen Formisano ◽  
Daniela Rigano ◽  
...  
Keyword(s):  
Biological Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Southern Italy ◽  
Oil Yield ◽  
Malva Sylvestris ◽  
Essential Oil Yield

Chemical Composition and Antimicrobial Activity of Rosmarinus officinalis L. Essential Oil Obtained via Supercritical Fluid Extraction

2005 ◽  
Vol 68 (4) ◽  
pp. 790-795 ◽  
Author(s):  
S. SANTOYO ◽  
S. CAVERO ◽  
L. JAIME ◽  
E. IBAÑEZ ◽  
F. J. SEÑORÁNS ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Rosmarinus Officinalis ◽  
Extraction Temperature ◽  
Gas Chromatography Mass Spectroscopy ◽  
The One ◽  
Main Components ◽  
Rosmarinus Officinalis L ◽  
Total Oil

The chemical composition and antimicrobial activity of essential oil–rich fractions obtained by supercritical CO2 extraction from Rosmarinus officinalis L. were investigated. Gas chromatography–mass spectroscopy analysis of these fractions resulted in the identification of 33 compounds of the essential oil. The main components of these fractions were α-pinene, 1,8-cineole, camphor, verbenone, and borneol, constituting ca. 80% of the total oil. The antimicrobial activity was investigated by the disc diffusion and broth dilution methods against six microbial species, including gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis), gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), a yeast (Candida albicans), and a fungus (Aspergillus niger). All of the essential oil–rich fractions obtained showed antimicrobial activity against all of the microorganisms tested, with inhibition zones and minimal bactericidal and fungicidal concentration values in the range of 17 to 33 mm and 2.25 to 0.25 mg/ml, respectively. The most active fraction was the one obtained in experiment 4 (4% ethanol as modifier; extraction pressure, 25 MPa; extraction temperature, 60°C). S. aureus was found to be the most sensitive bacteria to the rosemary extracts, whereas the least susceptible was A. niger. α-Pinene, 1,8-cineole, camphor, verbenone, and borneol standards also showed antimicrobial activity against all the microorganisms tested, borneol being the most effective followed by camphor and verbenone. In that way, it was confirmed that essential oil from experiment 4, with the best antimicrobial activity, presented the highest quantity of camphor, borneol, and verbenone.

scholarly journals Light intensities alter growth and essential oil of patchouli under shade nets

2022 ◽  
Vol 52 (5) ◽  
Author(s):  
Aurislaine Santos Ribeiro ◽  
Suzan Kelly Vilela Bertolucci ◽  
Alexandre Alves de Carvalho ◽  
Wesley Naves Tostes ◽  
Adriane Duarte Coelho ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Oil Content ◽  
Oil Yield ◽  
Light Intensities ◽  
Pogostemon Cablin ◽  
Aromatic Species ◽  
Pharmaceutical Industries ◽  
Essential Oil Yield

ABSTRACT: Pogostemon cablin (Blanco) Benth. is an aromatic species popularly known as patchouli. The essential oil rich in patchoulol extracted from leaves is used by the pharmaceutical industries. The objective was to investigate the effects of shade nets and shading intensities on P. cablin growth, anatomy, chemical composition and essential oil content. The experiment was conducted with two types of shade nets (black and Aluminet), three light intensities (30, 50, and 70% shading) and full sun. The different light intensities influenced the growth and the essential oil yield, and chemical composition. Patchouli plants grown in an environment with shading showed higher values for the leaf, stem, root ant total dry weights compared to full sun. At 50% of shading, Aluminet provided gain in stem and total dry weights. Aluminet and black net at 50 and 70% of shading enhance essential oil yield. Patchoulol and pogostol contents were higher under full sun, and, black net and Aluminet at 50% shading. The environment for patchouli cultivation can be improved by use shade nets, especially with Aluminet at 50% of shading.

Influence of common juniper berries pretreatment on the essential oil yield, chemical composition and extraction kinetics of classical and microwave-assisted hydrodistillation

2018 ◽  
Vol 122 ◽  
pp. 402-413 ◽  
Author(s):  
Miljana S. Marković ◽  
Dragana B. Radosavljević ◽  
Vladimir P. Pavićević ◽  
Mihailo S. Ristić ◽  
Svetomir Ž. Milojević ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Oil Yield ◽  
Extraction Kinetics ◽  
Microwave Assisted ◽  
Kinetics Of ◽  
Essential Oil Yield ◽  
Common Juniper

scholarly journals Chemical Description and Essential Oil Yield Variability of Different Accessions of Salvia lavandulifolia

2014 ◽  
Vol 9 (2) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Jaime Usano-Alemany ◽  
Jesús Palá-Paúl ◽  
Manuel Santa-Cruz Rodríguez ◽  
David Herraiz-Peñalver
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Maximum Yield ◽  
Oil Production ◽  
Oil Yield ◽  
Cultivated Plants ◽  
Maturation Stage ◽  
Essential Oil Yield ◽  
Essential Oil Production

The amount and chemical composition of essential oils are crucial for the modulation of the flavor, scent and therapeutic properties of aromatic and medicinal plants. The aim of this study was to evaluate the effects of phenology and weather conditions on the essential oil yield obtained from the aerial parts of Salvia lavandulifolia Vahl. Besides, we tried to carry out an approach to the chemical composition at the time of full bloom. Essential oil production of several accessions was monitored throughout the whole phenological cycle, both, at the original location growing wild and at the experimental plot as cultivated plants. Local pedoclimatic conditions seem to be crucial for the plant essential oil production. Our results showed high conditioning rates from both yearly climatic conditions and developmental stage of the plants. Maximum yield production was reported at the full seed maturation stage (average 1.74%) and after a slight dry period (average 2.16%). Phytochemical differences were maintained when plants were forced to grow under common pedoclimatic conditions. Thereby, essential oil analysis showed some populations formed by clearly distinct individuals while others had more homogenous plants. Compounds such α-pinene, β-pinene + myrcene, limonene, 1,8-cineol, camphor and β-caryophyllene were the main compounds of the essential oils of S. lavandulifolia.

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