Repellency, toxicity, and anti-oviposition of essential oil of Gardenia jasminoides and its four major chemical components against whiteflies and mites

AbstractThe essential oil of Mosla chinensis Maxim cv. Jiangxiangru is known for its antibacterial ability. This study aimed to investigate the chemical composition of Jiangxiangru essential oil and its inhibitory effect on Staphylococcus aureus biofilm formation. Gas chromatography/mass spectrometry (GC–MS) was used to determine the chemical composition of Jiangxiangru essential oil. Subsequently, the eight major chemical components were quantitatively analyzed using GC– MS, and their minimum inhibitory concentration (MIC) values against S. aureus were tested. Biofilm formation was detected by crystal violet semi-quantitative method and silver staining. Of the 59 peaks detected, 29 were identified by GC–MS. Of these peaks, thymol, carvacrol, p-cymene, γ-terpinene, thymol acetate, α-caryophyllene, 3-carene, and carvacryl acetate were present at a relatively higher concentration. The results of the quantitative test showed that thymol, carvacrol, p-cymene, and γ-terpinene were the major components of the essential oil. Among the eight reference substances, only thymol, carvacrol, and thymol acetate had lower MICs compared with the essential oil. Essential oil, carvacrol, carvacryl acetate, α-caryophyllene, and 3-carene showed the better inhibition of S. aureus biofilm formation. When one fourth of the MIC concentrations were used for these substances (0.0625 mg/mL for essential oil, 0.0305 mg/mL for carvacrol, 1.458 mg/mL for carvacryl acetate, 0.1268 mg/mL for α-caryophyllene, and 2.5975 mg/mL for 3-carene), the inhibition rates were over 80%. However, thymol, γ-terpinene, thymol acetate, and p-cymene showed a relatively poor inhibition of S. aureus biofilm formation. When 1× MIC concentrations of these substances were used, the inhibition rates were less than 50%. In conclusion, Jiangxiangru essential oil and its major components, carvacrol, carvacryl acetate, α-caryophyllene, and 3-carene, strongly inhibited biofilm formation in S. aureus.

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In vitro antimicrobial and cytotoxic activity of Lippia origanoides essential oil against bacteria of potential health concern

10.1101/2021.09.02.458771 ◽

2021 ◽

Author(s):

Edwin Stiven Quiguanás Guarín ◽

Juan Pablo Bedoya Agudelo ◽

Jhon Esteban Lopez-Carvajal ◽

Yuly Andrea Ramírez Tabares ◽

Leonardo Padilla Sanabria ◽

...

Keyword(s):

Antibacterial Activity ◽

Natural Products ◽

Essential Oil ◽

Vero Cells ◽

In Vitro Cytotoxicity ◽

Health Concern ◽

Chemical Components ◽

Potential Health ◽

Major Chemical

Due to the growing resistance they develop of bacteria to drugs, the search for alternatives in natural products is considered important such as Lippia origanoides essential oil. Here, the antibacterial activity of the oil and two of its major chemical components were tested against bacteria of potential health concern. The cytotoxicity of these compounds was evaluated in human erythrocytes and Vero cells. 51 compounds were identified in the LOEO, being terpinen-4-ol, γ-Terpinene, citronellal and thymol the main. LOEO and thymol showed antibacterial activity from 904 μg/mL and 200 μg/mL, respectively. γ-Terpinene did not show activity any concentration tested. LOEO showed hemolysis at concentration of 3000 μg/mL and thymol at 100 μg/mL. LOEO and thymol showed cytotoxicity in the evaluated cell lines at 250 μg/mL and 100 μg/mL, respectively. These compounds have a moderate cytotoxicity so it's considered necessary to study alternatives to reduce the in vitro cytotoxicity of these compounds.

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Formulation and Evaluation of Nagarmotha Hair Oil

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2021.39477 ◽

2021 ◽

Vol 9 (12) ◽

pp. 1107-1113

Author(s):

Miss. Patil Shivani Navnath

Keyword(s):

Chemical Composition ◽

Essential Oil ◽

Pharmacological Activity ◽

Cyperus Rotundus ◽

Chemical Components ◽

Therapeutic Action ◽

Extensive Review ◽

The Family ◽

Anti Inflammatory ◽

Major Chemical

Abstract: The Presenace study investigation oil isolation form cyperus rotundus and the chemical composition of essential oil of root's of Cyprus rotundus.In india it's commonly known as nagarmotha.and it belongs to the family cyperacea.the major chemical components of this herb are essential oils.flavonoids, terpenoids, sesauiterpenes, cyproten, cyperene, aselinene, rotundene, valencene, cyperol, gurjunene, transcalamenenene, cad'Alene, cyperoutundone, mustskone, isocyperol, acyperone etc. Reserch studies have shown that it possesses various Pharmacological activity Such as diuretic,carmenative emmenagogue, anthelmintic, analgesic, anti-inflammatory, anti-dysentery, anti-rheumatic activities.an extensive review of the ancient traditional literature and madern research revealead that the drug has numerous therapeutic action. Several of which have been established scientifically, which may help the reserchers to set their minds for approaching the utility efficiency and potency of nagarmotha. Keywords: cyperus rotundus, cyprotene flavanoids nagarmotha.

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BIOACTIVITY OF EUCALYPTUS ESSENTIAL OIL

International Journal of Engineering Applied Sciences and Technology ◽

10.33564/ijeast.2021.v05i12.017 ◽

2021 ◽

Vol 5 (12) ◽

Author(s):

Deep R Darji ◽

Palak Sapra ◽

Dr. Archana U. Mankad

Keyword(s):

Essential Oil ◽

Essential Oils ◽

Current Literature ◽

Chemical Components ◽

Plant Parts ◽

Cultivated Plant ◽

Medicinal Properties ◽

Major Chemical ◽

Eucalyptus Plant ◽

Eucalyptus Essential Oil

Eucalyptus plant belongs to myrtaceae family, it commonly known as eucalyptus. In line with worldwide, it’s worldwide cultivated plant. Eucalyptus plant parts has various and different bioactivities. The main chemical components of eucalyptus plant is 1, 8 cineole. It has very strong medicinal properties. And other major chemical components are limonene, ?pinene, P-Cymene, Terpine-1-ol, Globulol. Eucalyptus essential oil has strong bioactivities like antifungal, antibacterial, antioxidant, and antimycotoxigenic activities. Eucalyptus essential oil also has preservative properties. A review provides an overview of the current literature on eucalyptus essential oils mainly antifungal, antimycotoxigenic activity and their uses.

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Isolation and HPLC Determination of the Chemical Components of Gentianella acuta (Michx.) Hulten

Current Analytical Chemistry ◽

10.2174/1573411014666180730113804 ◽

2018 ◽

Vol 15 (1) ◽

pp. 21-33

Author(s):

Ying Wei ◽

Yongqiao Liu ◽

Yifan Hele ◽

Weiwei Sun ◽

Yang Wang ◽

...

Keyword(s):

Medicinal Plant ◽

High Speed ◽

Chemical Constituents ◽

Folk Medicine ◽

Gradient Elution ◽

Chemical Components ◽

Isolation And Characterization ◽

Major Chemical ◽

Main Components ◽

First Time

Background: Gentianella acuta (Michx.) Hulten is an important type of medicinal plant found in several Chinese provinces. It has been widely used in folk medicine to treat various illnesses. However, there is not enough detailed information about the chemical constituents of this plant or methods for their content determination. Objective: The focus of this work is the isolation and characterization of the major chemical constituents of Gentianella acuta, and developing an analytical method for their determination. Methods: The components of Gentianella acuta were isolated using (1) ethanol extraction and adsorption on macroporous resin. (2) and ethyl acetate extraction and high speed countercurrent chromatography. A HPLC-DAD method was developed using a C18 column and water-acetonitrile as the mobile phase. Based on compound polarities, both isocratic and gradient elution methods were developed. Results: A total of 29 compounds were isolated from this plant, of which 17 compounds were isolated from this genus for the first time. The main components in this plant were found to be xanthones. The HPLC-DAD method was developed and validated for their determination, and found to show good sensitivity and reliability. Conclusion: The results of this work add to the limited body of work available on this important medicinal plant. The findings will be useful for further investigation and development of Gentianella acuta for its valuable medicinal properties.

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The Influence of Biochar and Solid Digestate on Rose-Scented Geranium (Pelargonium graveolens L’Hér.) Productivity and Essential Oil Quality

Agronomy ◽

10.3390/agronomy9050260 ◽

2019 ◽

Vol 9 (5) ◽

pp. 260 ◽

Cited By ~ 5

Author(s):

Alessandro Calamai ◽

Enrico Palchetti ◽

Alberto Masoni ◽

Lorenzo Marini ◽

David Chiaramonti ◽

...

Keyword(s):

Essential Oil ◽

Climate Adaptation ◽

Oil Quality ◽

Dry Weight ◽

Chemical Components ◽

Growth Media ◽

Anaerobic Digestate ◽

Pelargonium Graveolens ◽

Positive Effects ◽

Leaf Chlorosis

In recent years, biochar has generated global interest in the areas of sustainable agriculture and climate adaptation. The main positive effects of biochar were observed to be the most remarkable when nutrient-rich feedstock was used as the initial pyrolysis material (i.e., anaerobic digestate). In this study, the influence of solid anaerobic digestate and biochar that was produced by the slow pyrolysis of solid digestate was evaluated by comparing the differences in the crop growth performances of Pelargonium graveolens. The experiment was conducted in a greenhouse while using three different growth media (i.e., solid digestate, biochar, and vermiculite). The results indicated that: (i) the pyrolysis of solid digestate caused a reduction in the bulk density (−52%) and an increase in the pH (+16%) and electrical conductivity (+9.5%) in the derived biochar; (ii) the best crop performances (number of leaves, number of total branches, and plant dry weight) were found using biochar, particularly for plant dry weight (+11.4%) and essential oil content (+9.4%); (iii) the essential oil quality was slightly affected by the growth media; however, the main chemical components were found within the acceptable range that was set by international standard trade; and, iv) biochar induced the presence of leaf chlorosis in Pelargonium graveolens.

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Research Progress of Essential Oil as a New Complementary Therapy in the Treatment of Depression

Mini-Reviews in Medicinal Chemistry ◽

10.2174/1389557521666210219161747 ◽

2021 ◽

Vol 21 ◽

Author(s):

Xinli Liang ◽

Xinli Wang ◽

Guowei Zhao ◽

Xiaoying Huang ◽

Xiqiang Xu ◽

...

Keyword(s):

Essential Oil ◽

Essential Oils ◽

Mental Disease ◽

Complementary Therapy ◽

Scientific Basis ◽

Research Progress ◽

Chemical Components ◽

Physical And Mental Health ◽

Plant Essential Oils ◽

Treatment Of Depression

: Depression is a mood disorder or affective disorder disease with depression as the main symptom. It has become a kind of mental disease that cannot be ignored in the world that seriously endangers human physical and mental health. Antidepressants commonly used in clinics generally have some defects including slow action, unremarkable effects and large side-effects. Therefore, there has a huge developing space for the research of new and effective therapeutic drugs to supplement or replace traditional drugs. Essential oil has obvious advantages in the treatment of depression and other emotional diseases, its aromatic odor can directly stimulate the olfactory nerves, and the lipophilic small- molecular compounds can cross the blood-brain barrier easily, to play its regulatory role of releasing of neurotransmitters and hormones related to depression, or adjusting the expression of brain-derived neurotrophic factor and proinflammatory cytokines. The pathogenesis of depression and the problems in traditional medication was illustrated, the research on the antidepressant effects and mechanism of essential oils in recent years was summarized and the antidepressant chemical components in plant essential oils were reviewed in this article. It could provide scientific basis for essential oil to be a new choice for relieving depression and treating depression.

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Seasonal characteristics, formation mechanisms and source origins of PM<sub>2.5</sub> in two megacities in Sichuan Basin, China

10.5194/acp-2017-258 ◽

2017 ◽

Author(s):

Huanbo Wang ◽

Mi Tian ◽

Yang Chen ◽

Guangming Shi ◽

Yuan Liu ◽

...

Keyword(s):

Sichuan Basin ◽

Urban Site ◽

Chemical Components ◽

Formation Mechanisms ◽

Major Mechanism ◽

Inorganic Aerosols ◽

Seasonal Characteristics ◽

Geographical Regions ◽

Secondary Aerosols ◽

Major Chemical

Abstract. To investigate the characteristics of PM2.5 and its major chemical components, formation mechanisms, and geographical origins in the two biggest cities, Chengdu (CD) and Chongqing (CQ) in Sichuan Basin, the most densely populated basin in China, daily PM2.5 samples were collected simultaneously at one urban site in each city from October 2014 to July 2015. Annual mean concentrations of PM2.5 were 67.0 ± 43.4 and 70.9 ± 41.4 μg m−3 at CD and CQ, respectively. Secondary inorganic aerosols (SNA) and organic matter (OM) accounted for 41.1 % and 26.1 %, respectively, of PM2.5 mass at CD, and 37.4 % and 29.6 % at CQ. Seasonal variations of PM2.5 and its major chemical components were significant, usually with the highest values in winter and the lowest in summer. SNA and OM were 1.7–3.4 times higher on polluted days than on clean days at both sites, whereas their percentage contributions to PM2.5 varied differently among the components and between the two sites. Gas-phase oxidation probably played an important role on the formation of secondary aerosols when PM2.5 mass varied in the range of 75–150 μg m−3, while heterogeneous transformation was likely the major mechanism on the heavy polluted days. Geographical regions causing high PM2.5 were identified to mainly distribute within the basin at both sites based on potential source contribution function (PSCF) analysis.

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