Gas chromatographic retention indices of monoterpenes and sesquiterpenes on methyl silicon and Carbowax 20M phases

Davies, Noel W.

doi:10.1016/s0021-9673(01)81487-4

Cited by 1,986 publications

(726 citation statements)

References 34 publications

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“…II apparatus, fitted with a fused silica HP-1 capillary column (30 m x 0.25 mm; 0.33 μm film thickness), coupled to an Agilent Mass Selective Detector MSD 5973; ionization voltage 70 eV; electron multiplier energy 2000 V. Gas chromatographic conditions were as reported above; transfer line temperature, 295 °C. Most constituents were identified through gas chromatography by comparing their retention indices to either those from the literature (Davies, 1990) or with those of authentic compounds available in our laboratories. The retention indices were determined in relation to a homologous series of n-alkanes (C 8 -C 24 ) under the same operating conditions.…”

Section: Plant Materialsmentioning

confidence: 99%

Active caspase-3 detection to evaluate apoptosis induced by Verbena officinalis essential oil and citral in chronic lymphocytic leukaemia cells

Martino¹,

Arena²,

Minervini³

et al. 2011

Rev. bras. farmacogn.

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Verbena officinalis L., Verbenaceae, commonly known as vervain, is a plant widely used in medicine. Despite of its widespread use in different traditional practices, the mechanisms of pharmacological actions of the plant and its volatile oil are still unclear. We evaluated the pro-apoptotic activity of V. officinalis essential oil and of its main component, citral, on lymphocytes collected from ten patients with chronic lymphocytic leukaemia (CLL), a disease in which a faulty apoptotic mechanism is still retained one of the primary pathogenic events, by adding to treated mononuclear cells, annexin-V, propidium iodide, and CD19. Apoptosis was also evaluated using anti-active-caspase-3 monoclonal antibody after permeabilization of the cells. Both V. officinalis essential oil and citral were found able to induce apoptosis in CLL cells and to activate caspase-3, which is considered the way by means they active apoptosis in B neoplastic cells. This data further support evidences that indicate natural compounds as possible lead structure to develop new therapeutic agents for CLL.

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Section: Plant Materialsmentioning

confidence: 99%

Active caspase-3 detection to evaluate apoptosis induced by Verbena officinalis essential oil and citral in chronic lymphocytic leukaemia cells

Martino¹,

Arena²,

Minervini³

et al. 2011

Rev. bras. farmacogn.

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“…Peak area percent was used for obtaining quantitative data with the HP-Chem Station software (Agilent Technologies) without using correction factors. Identification of the essential oil constituents was performed on the basis of MS library of NIST and Wiley, (Davies 1990 andAdams 1995 …”

Section: Analysis Of Essential Oilsmentioning

confidence: 99%

Chemical Composition and Antibacterial Activity of Essential Oils Isolated From Leaves of Different Woody Trees Grown In Al-Jabel Al-Akhdar Region, Libya

2016

Alexandria Science Exchange Journal: An International Quarterly

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The present study reports the variation in the essential oils (EOs) composition from needles and scale leaves of Pinus halepensis, Cupressus sempervirens and Juniperus phoenicea which collected from three different altitudes at Al-Jabel Al-Akhdar area, Libya. The impact of the altitude on the quantity and quality of EOs was studied. In addition, the antibacterial activity was evaluated using microdilution broth assay technique. The results showed that the highest percentages of the EOs yield were found in P. halepensis with 0.41, 0.60, and 0.43% for the altitudes of 125m (I), 391m (II), and 851m (III), respectively, while the lowest percentages of the yield were found in J. phoenicea, with 0.15, 0.07, and 0.18% at altitudes of I, II, and III, respectively. Based on P. halepensis EOs analyses using GC/MS, 35 components have been detected, which represents 89.92, 91.56, and 86.44% for the altitudes of I, II and III, respectively. Furthermore, high percentages from the components of α-pinene, β-pinene, α-terpineol and caryophyllene were identified at the three tested altitudes. For C. sempervirens EOs, 33 components were identified representing 84.94, 93.37 and 99.48% for levels I, II and III, respectively. The highest percentages of the EOs components in this species were α-pinene, terpinen-4-ol and α-terpiny acetate at the three tested elevations. However, the detected main components in J. phoenecea EOs were α-pinene, α-myrcene, α-terpinyl acetate and γ-terpinene. The highest antibacterial activity was observed for the oils from P. halepensisat and J. phoenicea at altitude I against the Agrobacterium tumefaciens, Erwinia carotovora, Corynebacterium fascians and Pseudomonas solanacearum. While the EOs extracted from scale leaves of C. sempervirens obtained from trees growing at level II were the most active against the tested bacteria. The results of this work revealed the impacts of the environmental conditions on the EOs composition which affected significantly in its quantitative and qualitative performances. Consequently, their biological activities were varied considerably. Moreover, the obtained data offer the opportunity to choose EOs with preferential compound for pharmaceutical, pesticides, perfume and food industries in such important region in Libya.

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“…Analytical conditions were as follows: injector and transfer line temperature at 250 and 240 °C, respectively; oven temperature was programmed from 60 to 240 °C at 3 °C min -1 ; carrier gas, helium at 1 ml min -1 ; splitless injection. The identifi cation of the constituents was based on comparison of the retention times with those of authentic samples, comparing their linear retention indices relative to the series of n-hydrocarbons, and on computer matching against commercial (NIST 98 and ADAMS) and home-made library mass spectra built from pure substances and components of known oils and MS literature data (DAVIES, 1990). Moreover, the molecular weights of all the identifi cation substances were confi rmed by GC-CIMS, using MeOH as CI ionising gas.…”

Section: Volatile Compound Analysesmentioning

confidence: 99%

Changes in volatile compounds and oil quality with the method of olive tree propagation and saline water irrigation

Mansour¹,

Balti²,

Boujnah³

et al. 2015

Acta Alimentaria

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The main goal of this study was to investigate the effects of moderate saline water irrigation on the composition and quality of olive oil of the "Chemlali" olive cultivar in comparison to a control plot grown under rain-fed conditions from two methods of olive tree propagation (suckers and cuttings). The antioxidant compounds, oxidative stability and volatile compounds of virgin olive oil samples were determined and reported. The irrigation did not affect free acidity and peroxide value and specifi c ultraviolet absorbance (K 232 , K 270 ). Whereas, fatty acid composition, oxidative stability, total phenol, total chlorophyll and carotenoid contents were affected by irrigation. Rain-fed virgin olive oils showed a statistically signifi cant higher content of oleic and linoleic acids. However, olive oil samples obtained from fruit of irrigated trees from suckers had a higher content of (E)-2 hexenal (67.2%) and a higher content of total phenols (860 mg kg -1 ). Interestingly, more stable oil was obtained from moderate saline water irrigated trees from suckers compared to olives from cuttings.

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Gas chromatographic retention indices of monoterpenes and sesquiterpenes on methyl silicon and Carbowax 20M phases

Cited by 1,986 publications

References 34 publications

Active caspase-3 detection to evaluate apoptosis induced by Verbena officinalis essential oil and citral in chronic lymphocytic leukaemia cells

Active caspase-3 detection to evaluate apoptosis induced by Verbena officinalis essential oil and citral in chronic lymphocytic leukaemia cells

Chemical Composition and Antibacterial Activity of Essential Oils Isolated From Leaves of Different Woody Trees Grown In Al-Jabel Al-Akhdar Region, Libya

Changes in volatile compounds and oil quality with the method of olive tree propagation and saline water irrigation

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