scholarly journals Toxicological Stability of Ocimum basilicum Essential Oil and Its Major Components in the Control of Sitophilus zeamais

Molecules ◽  
2021 ◽  
Vol 26 (21) ◽  
pp. 6483
Author(s):  
Eridiane da Silva Moura ◽  
Lêda Rita D’Antonino Faroni ◽  
Fernanda Fernandes Heleno ◽  
Alessandra Aparecida Zinato Rodrigues
Keyword(s):  
Essential Oil ◽  
Chemical Compounds ◽  
Storage Conditions ◽  
Sitophilus Zeamais ◽  
Botanical Insecticides ◽  
Gas Chromatograph ◽  
Mass Selective Detector ◽  
Selective Detector ◽  
Main Components ◽  
Corn Grains

Essential oils (EOs) are widely recognized as efficient and safe alternatives for controlling pest insects in foods. However, there is a lack of studies evaluating the toxicological stability of botanical insecticides in stored grains in order to establish criteria of use and ensure your efficiency. The objective of this work was to evaluate the toxicological stability of basil essential oil (O. basilicum) and its linalool and estragole components for Sitophilus zeamais (Motschulsky) adults in corn grains by fumigation. The identification of the chemical compounds of the essential oil was performed with a gas chromatograph coupled to a mass selective detector. Mortality of insects was assessed after 24 h exposure. After storage for six (EO) and two months (linalool and estragole) under different conditions of temperature (5, 20, and 35 °C) and light (with and without exposure to light), its toxicological stability was evaluated. Studies revealed that the essential oil of O. basilicum and its main components exhibited insecticidal potential against adults of S. zeamais. For greater toxicological stability, suitable storage conditions for them include absence of light and temperatures equal to or less than 20 °C.

scholarly journals Optimal Extraction of Ocimum basilicum Essential Oil by Association of Ultrasound and Hydrodistillation and Its Potential as a Biopesticide Against a Major Stored Grains Pest

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2781 ◽  
Author(s):  
Eridiane da Silva Moura ◽  
Lêda Rita D’Antonino Faroni ◽  
Fernanda Fernandes Heleno ◽  
Alessandra Aparecida Zinato Rodrigues ◽  
Lucas Henrique Figueiredo Prates ◽  
...  
Keyword(s):  
Biological Activity ◽  
Essential Oil ◽  
Insect Pests ◽  
Extraction Process ◽  
Ocimum Basilicum ◽  
Gas Chromatograph ◽  
Drying Temperature ◽  
Mass Selective Detector ◽  
Potential Control ◽  
Selective Detector

The essential oil of basil (Ocimum basilicum) has significant biological activity against insect pests and can be extracted through various techniques. This work aimed to optimize and validate the extraction process of the essential oil of O. basilicum submitted to different drying temperatures of the leaves and extracted by the combination of a Clevenger method and ultrasound. The biological activity of the extracted oil under different conditions was evaluated for potential control of Sitophilus zeamais. The extraction method was optimized according to the sonication time by ultrasound (0, 8, 19, 31 and 38 min) and hydrodistillation (20, 30, 45, 60 and 70 min) and drying temperature (20, 30, 45, 60 and 70 °C). The bioactivity of the essential oil was assessed against adults of S. zeamais and the effects of each variable and its interactions on the mortality of the insects were evaluated. The best yield of essential oil was obtained with the longest sonication and hydrodistillation times and the lowest drying temperature of leaves. Higher toxicity of the essential oil against S. zeamais was obtained by the use of ultrasound for its extraction. The identification and the relative percentage of the compounds of the essential oil were performed with a gas chromatograph coupled to a mass selective detector. The performance of the method was assessed by studying selectivity, linearity, limits of detection (LOD) and quantification (LOQ), precision and accuracy. The LOD and LOQ values for linalool were 2.19 and 6.62 µg mL−1 and for estragole 2.001 and 6.063 µg mL−1, respectively. The coefficients of determination (R2) were >0.99. The average recoveries ranged between 71 and 106%, with coefficient of variation ≤6.4%.

scholarly journals COMPOSITION OF ESSENTIAL OIL OF ARTEMISIA MACROCEPHALA JACQUE EX BESSER GROWING IN MONGO-LIA

2019 ◽  
pp. 105-112
Author(s):  
Svetlana Vasil'yevna Zhigzhitzhapova ◽  
Sambuunyam Sambuunyam ◽  
Tuyana Erdemovna Randalova ◽  
Larisa Dorzhiyevna Radnaeva
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Raw Material ◽  
Quadrupole Mass ◽  
Mass Selective Detector ◽  
Aerial Parts ◽  
Selective Detector ◽  
Main Components ◽  
Derivatives Of ◽  
Dark Blue

Сomposition of the essential oils of the plant Artemisia macrocephala, growштп in the central (aimak Arkhangai), northeastern (aimak Khentii) parts of Mongolia and compared with literature data are presented  in this paper. Essential oil was obtained by hydrodistillation method from dried aerial parts of plants.  Gas chromatography (GC) analyses was performed on an Agilent Technologies 6890 gas chromatograph equipped with quadrupole mass selective detector HP 5973  (MS) and an HP-5MS capillary column (30 m × 0.25 mm × 0.2 μm).  Dark-blue essential oil was isolated from the aerial part of the plant.  Chamazulene (7.4-16.1%) and α-bisabolol (3.4-20.7) are  main components of essential oil of  Artemisia macrocephala , are which indicates the promise of using this species  as a raw material for the isolation of essential oil with anti-inflammatory, bactericidal , regenerative properties. Oil are characterized by a significant content  (sum 20–28.9%) of derivatives of nerol (neryl-2-methylbutanoate, neryl-3-methylbutanoate, nerylpentanoat) and its isomer of  geraniol (geranyl-2-methylbutanoate, geranyl-3-methylbutanoate). Six compounds (1,8-cineol, terpineol-4, α-terpineol, β-celinene, T-cadinol, methyl isocostate) are also constant for the studied samples. Comparison with the literature data shows that the compositions of essential oils of Artemisia macrocephala of  mongolian and russian (siberian) flora are close.

scholarly journals The Extraction of Essential Oil from Piper Cubeba by Using Solvent Free Microwave Extraction Method

2020 ◽  
Vol 21 (2) ◽  
pp. 85-97
Author(s):  
Norma Eralita ◽  
Siti Khuzaimah
Keyword(s):  
Essential Oil ◽  
Microwave Power ◽  
Raw Materials ◽  
Chemical Compounds ◽  
Solvent Free ◽  
Microwave Extraction ◽  
Chemical Analyses ◽  
Gas Chromatograph ◽  
Gas Chromatograph Mass Spectrometry ◽  
Physical And Chemical

This research aims to study the production of essential oil from Piper Cubeba using the solvent-free microwave extraction (SFME) method. Before extraction, the raw materials are prepared in the form of grains and powders to vary the size of the raw materials. Time variation was carried out at microwave power 180 Watt Analyses were then performed on the resulting essential oil using both physical and chemical tests of density and solubility with 96% alcohol. Analyses of chemical compounds within the essential oil were then performed using the Gas Chromatograph Mass Spectrometry (GC-MS). It was found that the production of essential oil from Piper Cubeba using the SFME method was affected by microwave power, grain size, and treatment duration. Results from physical and chemical analyses revealed that the resulting cubeb oil has 0.86 g/mL density, which means that essential oil produced using the SFME method is lighter compared than those produced using MAHD methods. Results from GC-MS analyses showed eight components detected from the production of essential oil from Piper cubeba using the SFMEmethod; Copaene (39.28%), Cubebene (23.83%), Isoledene (11.66%), Naphthalene (6.65%), Phellandrene (5.81%), Asarone (5.71%), Cadidene (4.90%), and Caryophyllene (2.16%) which contents belong to the sesquiterpene group

scholarly journals Impact of Different Storage Conditions on Composition of Lemongrass (Cymbopogon citratus L.) Essential Oil of Tien Giang Province, Vietnam

2020 ◽  
Vol 32 (11) ◽  
pp. 2743-2747
Author(s):  
Thi Kim Ngan Tran ◽  
Tan Phat Dao ◽  
Thi Cam Quyen Ngo ◽  
Thien Hien Tran ◽  
Ung Thanh Dat ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Storage Time ◽  
Physical Stability ◽  
Chemical Properties ◽  
Storage Conditions ◽  
Citronella Oil ◽  
Main Components ◽  
Physical And Chemical

Essential oils are known to be susceptible to changes and degradation that can lead to loss of quality and pharmacological properties. In this work, lemongrass essential oil is stored under different storage conditions under the influence of light and temperature, assessing the physical and chemical properties as well as the chemical composition of the citronella essential oil respectively. The change in the chemical composition of citronella oil is determined based on the storage time of 4 months under different conditions i.e. light (45 ºC) and in dark (4 ºC). To determine the change in the composition of the essential oil, based on the results of GC-MS analysis methods to monitor the chemical changes of the essential oil. The content of main components of citral and β-myrcene increases significantly after storage time under the influence of light and temperature. Some low content components (β-citronello, β-caryophyllen, p-cymen-8-ol, etc.) are likely to be oxidized and lost under light conditions, even in the dark. Therefore, the importance of external storage factors for the chemical and physical stability of essential oils is a matter of concern to control the quality of scientific evaluation.

scholarly journals Fumigant Compounds from the Essential Oil of ChineseBlumea balsamiferaLeaves against the Maize Weevil (Sitophilus zeamais)

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Sha Sha Chu ◽  
Shu Shan Du ◽  
Zhi Long Liu
Keyword(s):  
Essential Oil ◽  
Silica Gel ◽  
Chromatographic Separation ◽  
Medicinal Herb ◽  
Sitophilus Zeamais ◽  
Fumigant Toxicity ◽  
Caryophyllene Oxide ◽  
Maize Weevil ◽  
Chinese Medicinal Herb ◽  
Main Components

Essential oil of Chinese medicinal herb,Blumea balsamiferaleaves, was found to possess fumigant toxicity against the maize weevils,Sitophilus zeamais. The main components of the essential oil ofB. balsamiferawere 1,8-cineole (20.98%), borneol (11.99%),β-caryophyllene (10.38%), camphor (8.06%), 4-terpineol (6.49%),α-terpineol (5.91%), and caryophyllene oxide (5.35%). Bioactivity-guided chromatographic separation of the essential oil on repeated silica gel columns led to isolate five constituent compounds, namely, 1,8-cineole, borneol, camphor,α-terpineol, and 4-terpineol. 1,8-Cineole, 4-terpineol, andα-terpineol showed pronounced fumigant toxicity againstS. zeamaisadults (LC50= 2.96 mg/L, 4.79 mg/L, and 7.45 mg/L air, resp.) and were more toxic than camphor (LC50= 21.64 mg/L air) and borneol (LC50= 21.67 mg/L air). The crude essential oil also possessed strong fumigant toxicity againstS. zeamaisadults (LC50= 10.71 mg/L air).

Marijuana Testing in Urine: Use of a Hexadeuterated Internal Standard for Extended Linearity, and Ion Trap vs Mass Selective Detector Gas Chromatograph/Mass Spectrometer Systems

1992 ◽  
Vol 38 (5) ◽  
pp. 717-719 ◽  
Author(s):  
W A Joern
Keyword(s):  
Mass Spectrometer ◽  
Ion Trap ◽  
Internal Standard ◽  
Chromatographic Peak ◽  
Gas Chromatograph ◽  
Mass Selective Detector ◽  
Peak Overlap ◽  
Trap Detector ◽  
Selective Detector

Abstract The use of a hexadeuterated internal standard for the assay of the marijuana carboxy metabolite in urine resulted in two significant improvements. First, the linearity of the procedure was increased considerably because of the minimal chromatographic peak overlap of the internal standard and carboxy metabolite derivatives. Second, again because of minimal peak overlap, the same extract could be analyzed with similar results by both the ion trap detector and mass selective detector gas chromatograph/mass spectrometer systems.

scholarly journals Urinary excretion of diethylstilbestrol in the ostrich : research communication

1998 ◽  
Vol 69 (2) ◽  
Author(s):  
P.J. Van der Merwe ◽  
A. Pretorius ◽  
W. Burger
Keyword(s):  
Urinary Excretion ◽  
Residue Analysis ◽  
Parent Compound ◽  
Growth Promoter ◽  
Gas Chromatograph ◽  
Research Communication ◽  
Mass Selective Detector ◽  
Selective Detector

Stilboestrol (R) tablets (20 x 1 mg) were given to 4 ostriches. Urine was collected over a period of 8 days and stored frozen at -20 oC pending analysis. Analyses were performed on a gas chromatograph - mass selective detector for the presence of parent compound and/or metabolites. Diethylstilbestrol and its metabolite, dienestrol, were detected in urine; dienestrol only for 1 day but diethylstilbestrol for 8 days after administration. Residue analysis for the use of diethylstilbestrol as growth promoter can be performed on the urine of ostriches by scanning for parent compound only since it can be detected longer than the metabolite.

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