Search results for "ESSENTIAL OIL"
showing 10 items of 443 documents
Biotechnological Approaches to Increase Essential Oil Yield and Quality in Aromatic Plants: The Lavandula latifolia (Spike Lavender) Example. Past an…
2019
Increasing knowledge about isoprenoid biosynthesis pathways has provided new tools for aromatic plant breeding using biotechnological approaches. Notably, there are possibilities to modify essential oil profiles and enhance production of valuable monoterpenes. This attains a particular significance in Lavandula latifolia Medik. (spike lavender), one of the most important essential oil crops in Spain. This chapter summarizes work done to improve essential oil yield and quality by engineering: (1) the enzymes controlling regulatory steps of methyl-D-erythritol 4-phosphate (MEP) and mevalonic acid (MVA) pathways to increase C5 units employed for monoterpene biosynthesis and (2) the monoterpene…
Essential oil of Cyphostemma juttae (Vitaceae): Chemical composition and antitumor mechanism in triple negative breast cancer cells
2019
The genus Cyphostemma (Planch.) Alston (Vitaceae) includes about 150 species distrib- uted in eastern and southern Africa and Madagascar. Some species are used in traditional medicine and their biological activities, including antiproliferative effects against cancer cell lines, have been demonstrated. To date no investigations on Cyphostemma essential oils have been carried out. Essential oils, which play important roles in plant defenses have been demonstrated to be active in the treatment of several human diseases and to enhance bioavability of other drugs. The aim of this paper was to identify the chemical composition of the essential oil of the leaves of Cyphostemma juttae (Dinter &…
Volatile Compounds in Citrus Essential Oils: A Comprehensive Review
2019
[EN] The essential oil fraction obtained from the rind of Citrus spp. is rich in chemical compounds of interest for the food and perfume industries, and therefore has been extensively studied during the last decades. In this manuscript, we provide a comprehensive review of the volatile composition of this oil fraction and rind extracts for the 10 most studied Citrus species: C. sinensis (sweet orange), C. reticulata (mandarin), C. paradisi (grapefruit), C. grandis (pummelo), C. limon (lemon), C. medica (citron), C. aurantifolia (lime), C. aurantium (bitter orange), C. bergamia (bergamot orange), and C. junos (yuzu). Forty-nine volatile organic compounds have been reported in all 10 species,…
Chemical Composition of the Essential Oil ofAnethum graveolensAerial Parts
2014
Abstract:The chemical composition of the essential oil obtained by hydrodistillation method from the aerial parts of Anethum graveolens were analysed by GC-MS. Twelve compounds constituting 96.8 % of the oil were identified. The main compounds were α-phellandrene (31.8 %), apiole (15.3 %), dill ether (13.2 %), limonene (11.8 %), geraniol (10.6 %) and pcymene (5.3 %). The chemical composition of the oil was found to be similar as reported from India and abroad, however there was a considerable quantitative variation among the major compounds identified.
Composition of the Essential Oil ofDictamnus hispanicusfrom Spain
2006
The composition of the essential oil of Dictamnus hispanicus Webb ex. Willk. collected in eastern Spain was analyzed by GC and GC/MS. The main constituents identified were methyl chavicol (79%) and limonene (7%). The high oil yield (72.0% fresh plant material) and the proportion of the main compounds support the consideration of D. hispanicus as a separate species of the S. and CS. Europe as D. albus aggregate or as a new chemotype of the polymorphic D. albus.
Supercritical CO2 extraction of essential oil from orange peel. Effect of operation conditions on the extract composition
1999
Abstract The supercritical fluid extraction (SFE) of orange essential oil was studied using dehydrated orange peel (0.0538 kg H2O/kg dm) from naveline cultivars as raw material and CO2 as solvent. The effect of operation conditions was analyzed in a series of experiments at temperatures between 293 and 323 K and pressures between 8 and 28 MPa. The collected extracts were analyzed and the relative composition of the essential oil was determined. Limonene was the principal component extracted, the optimum conditions for limonene extraction were 12.5 MPa and 308 K, in these conditions limonene represents more than 99.5% of the essential oil. Within the operating range conditions, the optimum f…
Control of Portulaca oleracea by boldo and lemon essential oils in different soils
2015
Soil characteristics influence plant growth and can affect the phytotoxicity of the essential oils. In this study chemical composition and herbicidal activity of Peumus boldus Mol. and lemon essential oils in different growing medium against Portulaca oleracea L. was investigated. Ninety-four compounds accounting between 95.5 and 99.8% of the total essential oil were identified by gas chromatography-mass spectrometry in boldo and lemon essential oils. Ascaridole (31.56. ±. 0.15%), p-cymene (21.58. ±. 0.09%) and 1,8-cineole (12.57. ±. 0.13%) were the main compounds in P. boldus whereas large amount of limonene (59.28%) followed of β-pinene (12.96%) and γ-terpinene (10.92%) were found in lemo…
Analysis of the Essential Oil of the So-called“Mentha mirennae”Bruno by GC and GC/MS
1992
ABSTRACT The essential oil of “Mentha mirennae” Bruno was analyzed by a combination of GC, GC/MS and 13C-NMR. It was found to contain more than 50 components of which about 40 (96%) were identified. The major compounds were linalool (70%), linalyl acetate (9.8%) and limonene (1.5%). From a comparison with the main constituents found in different Mentha oils, we presume that “M. mirennae” must be the hybrid M. citrata Ehrl. However, according to botanical and chemical data the possibility that “M. mirennae” is, in fact, M. spicata L. cannot be excluded.
Aroma Profiling of Leaf, Flower, Peel and In Vitro Embryo Tissues of “Ciaculli Late” Mandarin
2003
Abstract Volatile compounds released from leaf, flower and peel as well as from somatic (nucellar) embryo tissues of “Tardivo di Ciaculli” or “Ciaculli late” mandarin have been collected/ concentrated by headspace solid phase microextraction, HS-SPME, and analyzed by GC-MS. The tehnique allowed the rapid comparison of the volatiles from the various sources; in particular, 19 compounds were identified for the embryos, 16 for leaf and flower and 13 for peel. Limonene was the most abundant volatile component of the embryo and peel while γ-terpinene was the major compound among volatiles from leaf and flower. Relatively high amounts of methyl N-methyl anthranilate and β-caryophyllene were also …
Solubilities of Essential Oil Components of Orange in Supercritical Carbon Dioxide
2000
The solubilities of pure limonene and linalool in compressed carbon dioxide have been measured using a flow apparatus at 318.2 K and 328.2 K and pressures ranging from 69 bar to 111 bar. The solubilities were successfully modeled using equations of state (Peng−Robinson, Soave−Redlich−Kwong, 3P1T, Dohrn and Prausnitz nopolar) and a semiempirical equation (Chrastill model). The generalized parameters for the Peng−Robinson EOS were obtained for each system. These parameters were independent of temperature, and they reproduce successfully all data available in the literature. The results show that the solubility of limonene in supercritical carbon dioxide was bigger than the solubility of linal…