scholarly journals Composition and Bioactivity of Essential Oil From the Leaves of Genipa americana Against the Coconut Mite Aceria guerreronis

2019 ◽  
Vol 11 (18) ◽  
pp. 197
Author(s):  
Alex S. de Jesus ◽  
Caroline R. Coelho ◽  
Ighor C. Barreto ◽  
José G. Sena Filho ◽  
Paulo Cesar de L. Nogueira ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Essential Oil ◽  
Biological Properties ◽  
Gas Chromatography Mass Spectrometry ◽  
Flame Ionization Detection ◽  
Aceria Guerreronis ◽  
Flame Ionization ◽  
Coconut Mite ◽  
Production Areas

Genipa americana L. has a diversity of secondary metabolites, including iridoids, phenolic compounds, and alkaloids. Pharmacological and biological properties have also been reported. This study has aimed to evaluate the chemical composition of the essential oil (EO) obtained from the leaves of G. americana and its bioactivity against Aceria guerreronis Keifer (Acari: Eriophyidae), a serious pest of coconut production areas worldwide. EO from the leaves was extracted and analyzed by Gas Chromatography-Mass Spectrometry and flame ionization detection (GC-MS/FID). For the bioassays, the adult coconut mites were subjected to increasing concentrations of EO. The analyses showed a predominance of sesquiterpenes, followed by monoterpenes, aldehydes, and fatty acids. The EO (LC50 = 0.41 mg mL-1; LC90 = 6.43 mg mL-1) showed toxicity and repellent effects against the coconut mite. The tested EO has the potential to develop as a natural product, with acaricidal activities against A. guerreronis, in order to assist in the control of the coconut mite.

Chemical Composition of Technical Chlordane

1976 ◽  
Vol 59 (3) ◽  
pp. 696-702 ◽  
Author(s):  
William P Cochrane ◽  
Roy Greenhalgh
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Electron Capture Detection ◽  
Organochlorine Insecticide ◽  
Flame Ionization Detection ◽  
Reference Standard ◽  
Peak Overlap ◽  
Flame Ionization ◽  
Temperature Programmed

Abstract Technical chlordane, a multicomponent organochlorine insecticide, was separated into 26 peaks by temperature-programmed gas chromatography, using a 3% OV-17 column. Peaks were identified by using combined gas chromatography-mass spectrometry (GLC-MS) and, where individual standards were available, by comparing retention times on various columns. Technical chlordane constituents were also investigated by GLC-MS, using a Dexsil 300 column; 19–20 peaks were observed. Quantitation studies indicated differences in the per cent contributions of the constituents, particularly for heptachlor and trans-chlordane, in 2 different technical chlordane reference standards. For the same reference standard higher results were obtained by using 63Ni electron capture detection than by using flame ionization detection. By using a combination of 4 GLC columns to overcome peak overlap, we determined that the 11 known constitutents of technical chlordane constituted approximately 40%.

Chemical Composition of the Essential Oil From Minthostachys acris Schmidt-Leb. Grown in the Peruvian Andes

2019 ◽  
Vol 14 (7) ◽  
pp. 1934578X1985749
Author(s):  
Jorge A. Pino ◽  
María Milagros Dueñas-Mendoza ◽  
Leoncio Solís-Quispe
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Essential Oil ◽  
Steam Distillation ◽  
Gas Chromatography Mass Spectrometry ◽  
Ionization Detector ◽  
Peruvian Andes ◽  
Flame Ionization ◽  
Aerial Parts

The chemical composition of the essential oil from aerial parts of Minthostachys acris Schmidt-Leb. grown in Cuzco was studied. A total of 59 volatile compounds were identified by gas-chromatography-flame ionization detector and gas chromatography-mass spectrometry in the essential oil obtained by steam distillation, of which the most prominent were pulegone (54.4%), cis-menthone (11.0%), and thymol (6.3%).

scholarly journals Chemical composition and yield of essential oil from three Croton species

2017 ◽  
Vol 47 (8) ◽  
Author(s):  
Giuliane Sampaio de Souza ◽  
Oriel Herrera Bonilla ◽  
Eliseu Marlônio Pereira de Lucena ◽  
Yuri Pereira Barbosa
Keyword(s):  
Mass Spectrometry ◽  
Essential Oil ◽  
Essential Oils ◽  
Biological Properties ◽  
Oil Extraction ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Profile ◽  
Medicinal Properties ◽  
Daily Time ◽  
Dry And Rainy Seasons

ABSTRACT: Marmeleiros are popularly known for the medicinal properties ascribed to their essential oils. This research aimed to analyze the essential oil of leaves from three Croton species (Croton argyrophylloides, Croton jacobinensis, and Croton sincorensis), to verify whether the daily time and harvest season in the year may interfere with their essential oils performance and composition. From each species, 1,500g of green leaves were harvested in Viçosa do Ceará - CE, at 6am and 12pm, during both dry and rainy seasons. Essential oil extraction was conducted by the method of water vapor drag and chemical profile was analyzed by gas chromatography-mass spectrometry (GC/MS). The highest yield was obtained at 12pm in the dry season for C. argyrophylloides and C. jacobinensis, and at 6am in the rainy season for C. sincorensis. Bicyclogermacrene demonstrated higher relative abundance in C. argyrophylloides (28.09 to 30.59%), C. jacobinensis (25.2 to 30.14%), and C. sincorensis (23.86 and 21.71%), and the only exception was at 6am in C. sincorensis, where (E)-caryophyllene was the most abundant compound (25.34%). The yield and composition of the studied species were influenced by rainfall, temperature, and sunlight, presenting statistical significant differences between the different periods studied. The species produce constituents with specific biological properties; and therefore, they can be used as a natural source.

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