scholarly journals Amylose Inclusion Complexes as Emulsifiers for Garlic and Asafoetida Essential Oils for Mosquito Control

Insects ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 337 ◽  
Author(s):  
Ephantus J. Muturi ◽  
William T. Hay ◽  
Robert W. Behle ◽  
Gordon W. Selling
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Inclusion Complexes ◽  
Mosquito Control ◽  
Storage Period ◽  
High Sensitivity ◽  
Sodium Palmitate ◽  
Plant Essential Oils ◽  
Vector Management ◽  
High Volatility

Although the insecticidal properties of some plant essential oils are well-documented, their use in integrated pest and vector management is complicated by their high volatility, low thermal stability, high sensitivity to oxidation, and low solubility in water. We investigated the use of bio-based N-1-hexadecylammonium chloride and sodium palmitate amylose inclusion complexes as emulsifiers for two essential oils, garlic and asafoetida, known to be highly toxic to mosquito larvae. Four emulsions of each essential oil based on amylose hexadecylammonium chloride and amylose sodium palmitate inclusion complexes were evaluated for their toxicity against Aedes aegypti L. larvae relative to bulk essential oils. All emulsions were significantly more toxic than the bulk essential oil with the lethal dosage ratios ranging from 1.09–1.30 relative to bulk essential oil. Droplet numbers ranged from 1.11 × 109 to 9.55 × 109 per mL and did not change significantly after a 6-month storage period. These findings demonstrated that amylose inclusion complexes enhanced the toxicity of essential oils and could be used to develop new essential oil based larvicides for use in integrated vector management.

scholarly journals Host–Guest Inclusion Complexes of Essential Oils with Strong Antibacterial and Antifungal Features in Beta-Cyclodextrin for Solid-State Pharmaceutical Applications

2021 ◽  
Vol 11 (14) ◽  
pp. 6597
Author(s):  
Aldo Arrais ◽  
Marta Manzoni ◽  
Alessia Cattaneo ◽  
Valentina Gianotti ◽  
Nadia Massa ◽  
...  
Keyword(s):  
Solid State ◽  
Essential Oil ◽  
Essential Oils ◽  
Inclusion Complexes ◽  
Production Costs ◽  
Good Tolerance ◽  
Actual Application ◽  
Beta Cyclodextrin ◽  
Ft Ir ◽  
Antibacterial And Antifungal

Essential oils are widely recognized as natural alternatives to pharmaceutical antibacterial and antifungal agents. With respect to standard pharmaceutics, the advantages of essential oils are their (i) low production costs, (ii) lack of chemical and biochemical drawbacks that are intrinsic to the synthetic production process and (iii) good tolerance by humans. On the other hand, the liquid nature of essential oils poses concerns about their actual application in different therapeutic issues regarding their persistence and the ability to control or prolong drug release. In this study, two essential oils from oregano and winter savory showing antibacterial and antifungal features were complexed in a solid state with beta-cyclodextrin. Host–guest inclusion complexes were characterized using FT-IR spectroscopy, ESI-MS and GC-MS techniques. Manyfold terpenic and non-terpenic components of the oils could be observed and unambiguously identified as being included inside the carbohydrate hosts. Many of them provided a specific biocidal action. Indeed, essential oil host–guest inclusion products were tested against two Candida species and an S. aureus reference strain, showing that the oils effectively maintained their liquid performances. Solid-state tablets of the essential oil inclusion complexes embedded in polyvinylpyrrolidone could be obtained. These results pave the way for the solid-state application of essential oils in antibacterial and antifungal pharmaceutical treatments.

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

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.

Effect of Plant Essential Oils and Their Major Constituents on Cypermethrin Tolerance Associated Detoxification Enzyme Activities in Spodoptera litura (Lepidoptera: Noctuidae)

2019 ◽  
Vol 112 (5) ◽  
pp. 2167-2176 ◽  
Author(s):  
Torranis Ruttanaphan ◽  
Wanchai Pluempanupat ◽  
Chutikan Aungsirisawat ◽  
Polnarong Boonyarit ◽  
Gaelle Le Goff ◽  
...  
Keyword(s):  
Essential Oil ◽  
Synergistic Effect ◽  
Essential Oils ◽  
Spodoptera Litura ◽  
Cytochromes P450 ◽  
Detoxification Enzymes ◽  
Plant Essential Oils ◽  
Activity Measurements ◽  
Lepidoptera Noctuidae ◽  
Essential Oil Compounds

Abstract Essential oils are well known to act as biopesticides. This research evaluated the acute toxicity and synergistic effect of essential oil compounds in combination with cypermethrin against Spodoptera litura Fabricius (Lepidoptera: Noctuidae). The effects of distillation extracts of essential oils from Alpinia galanga Zingiberaceae (Zingiberales) rhizomes and Ocimum basilicum Lamiaceae (Lamiales) leaves; one of their primary essential oil compounds 1,8-cineole; and linalool were studied on second-instar S. litura by topical application under laboratory conditions. The results showed that A. galanga had the highest control efficiency, whereas1,8-cineole provided a moderate efficacy. The mixtures of linalool, 1,8-cineole, O. basilicum, or A. galanga with cypermethrin were synergistic on mortality. Activity measurements of the main detoxification enzymes show that linalool and 1,8-cineole inhibit the activity of cytochromes P450 and carboxylesterases, which could explain their synergistic effect. Based on our results, the use of these mixtures represents an ideal eco-friendly approach, helping to manage cypermethrin resistance of S. litura.

scholarly journals Essential Oils from Indigenous Iranian Plants: A Natural Weapon vs. Multidrug-Resistant Escherichia coli

2022 ◽  
Vol 10 (1) ◽  
pp. 109
Author(s):  
Mohammadreza Pajohi Alamoti ◽  
Behnaz Bazargani-Gilani ◽  
Razzagh Mahmoudi ◽  
Anna Reale ◽  
Babak Pakbin ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Essential Oil ◽  
Essential Oils ◽  
Antimicrobial Properties ◽  
Multidrug Resistant ◽  
Zataria Multiflora ◽  
Cuminum Cyminum ◽  
Plant Essential Oils ◽  
E Coli ◽  
Mentha Longifolia

Aim of this study was to investigate the antimicrobial properties of herbal plant essential oils (EOs) from selected Iranian plant species such as Ferulago angulata, Zataria multiflora, Cuminum cyminum, and Mentha longifolia against antibiotic-resistant Escherichia coli (E. coli) strains. For this purpose, the Escherichia coli strains, isolated from raw cow’s milk and local dairy products (yogurt, cream, whey, cheese, and confectionery products) collected from different areas of Hamedan province, Iran, were investigated for their resistance to antibiotics (i.e., streptomycin, tetracycline, gentamicin, chloramphenicol, ciprofloxacin, and cefixime). Thus, the E. coli strains were tested for their susceptibility to the above-mentioned essential oils. Regarding antibiotics, the E. coli strains were highly sensitive to ciprofloxacin. In relation to essential oils, the most effective antibacterial activity was observed with Zataria multiflora; also, the bacteria were semi-sensitive to Cuminum cyminum and Mentha longifolia essential oils. All strains were resistant to Ferulago angulata essential oil. According to the results, the essential oil of Zataria multiflora can be considered as a practical and alternative antibacterial strategy to inhibit the growth of multidrug-resistant E. coli of dairy origin.

scholarly journals Essential Oils-Loaded Polymer Particles: Preparation, Characterization and Antimicrobial Property

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1017 ◽  
Author(s):  
Francesca Froiio ◽  
Lorianne Ginot ◽  
Donatella Paolino ◽  
Noureddine Lebaz ◽  
Abderrazzak Bentaher ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Essential Oil ◽  
Essential Oils ◽  
Shelf Life ◽  
Orange Juice ◽  
Water Solubility ◽  
Antimicrobial Property ◽  
Storage Period ◽  
Orange Essential Oil

In the last few years, essential oils (EOs) derived from plants have aroused great interest due to their well-known antimicrobial activity. Unfortunately, they present several limitations in their use, such as photosensitivity, temperature sensitivity, high volatility, and poor water solubility. The encapsulation technique represents a good solution to these problems and ensures protection of the functional properties of essential oils. In this work, bergamot essential oil (BEO) and sweet orange essential oil (OEO) loaded-Eudragit® RS 100 (EuRS100) nanoparticles (NPs) were prepared by using the nanoprecipitation technique. We obtained nanoparticles characterized by a mean diameter of 57 to 208 nm and a positive surface charge (39 to 74 mV). The antibacterial activity of the obtained systems against Escherichia coli was in vitro investigated. We demonstrated that both orange and bergamot essential oils were successfully encapsulated and our nanoparticles have good antibacterial activity. Finally, in order to evaluate the potential applicability of OEONps to prolong fresh orange juice shelf-life, survival of E. coli during a storage period of one week at 25 °C was investigated: Orange essential oil-loaded nanoparticles (OEONPs) have been able to prolong the orange juice shelf life.

scholarly journals ADULTICIDAL ACTIVITY OF BOTANICAL OILS BY IMPREGNATED PAPER ASSAY AGAINST CULEX QUINQUEFASCIATUS SAY

2017 ◽  
Vol 9 (5) ◽  
pp. 156
Author(s):  
M. Ramar ◽  
S. Ignacimuthu ◽  
P. Manonmani ◽  
K. Murugan
Keyword(s):  
Essential Oils ◽  
Culex Quinquefasciatus ◽  
Mosquito Control ◽  
Exposure Period ◽  
Adult Mortality ◽  
Clove Oil ◽  
Chemical Insecticide ◽  
Plant Essential Oils ◽  
Knock Down ◽  
Indigenous Plant

Objective: The present study was undertaken with the aim of finding out the efficacy of essential oils (EOs) as anti-mosquito agents for commercial purposes. Plant source insecticides as an alternative to chemical insecticide, this study were evaluated to assess the knock-down and adulticidal prospective of the essential oils against Culex quinquefasciatus. The plant essential oil is largely cultivated throughout India and in all Tropical countries.Methods: The selected botanical essential oils were procured from commercial producers of plant essential oils and aromatic substances were used in this study. Knock-down and Adulticidal bioassay was performed according to WHO protocol. A single dose of the essential oils was used in the preliminary screening. 20 adult mosquitoes (3-5 d old glucose fed mosquitoes) were exposed on treated paper for one hour and knocked down and live mosquitoes were counted at 5 minute intervals.Results: Among the twenty three oils tested, 100% knock-down and adult mortality was recorded at 10%/cm2dose of calamus, camphor, cinnamon, citronella, clove, eucalyptus, lemongrass, pine, thyme and tulsi oils respectively. At 10 % concentration, clove oil (KT50 =1.8 and KT90 = 2.03 min) was found to be the most potential treatment. After 15 min exposure period clove oil registered the lowest knock-down dosewhich was calculated as (KD50 =1.8 %/cm2and KD90 =11.2 %/cm2). The lower and upper 95 % confidence limits for clove oil were calculated as 0.2 and 4.2 min respectively.Conclusion: From the results it can be concluded that the adult of the Cx. quinquefasciatus were susceptible to the essential oils. Such findings would be useful in promoting research aiming at the development of new agent for mosquito control on basis of chemical compounds from indigenous plant sources as an alternative to chemicals.

scholarly journals Insecticidal Activity of Commiphora erythraea Essential Oil and Its Emulsions Against Larvae of Three Mosquito Species

2020 ◽  
Vol 57 (6) ◽  
pp. 1835-1842
Author(s):  
Ephantus J Muturi ◽  
William T Hay ◽  
Kenneth M Doll ◽  
Jose L Ramirez ◽  
Gordon Selling
Keyword(s):  
Essential Oil ◽  
Inclusion Complex ◽  
Metabolic Pathways ◽  
Chemical Constituents ◽  
Mosquito Species ◽  
Chemical Constituent ◽  
Sodium Palmitate ◽  
Vector Management ◽  
Oil Emulsions ◽  
Promising Source

Abstract The use of essential oils as ecofriendly tools for vector management is one of the mainstreams for biopesticide research. We evaluated the larvicidal properties of Commiphora erythraea (opoponax) essential oil and its fractions against Culex restuans Theobald, Culex pipiens L., and Aedes aegypti L. The use of bio-based amylose–N-1-hexadecylammonium chloride inclusion complex (Hex-Am) and amylose–sodium palmitate inclusion complex (Na-Palm) as emulsifiers for C. erythraea essential oil was also investigated. Bisabolene was the most abundant chemical constituent in the whole essential oil (33.9%), fraction 2 (62.5%), and fraction 4 (23.8%) while curzerene (32.6%) and α-santalene (30.1%) were the dominant chemical constituents in fractions 1 and 3, respectively. LC50 values for the whole essential oil were 19.05 ppm for Cx. restuans, 22.61 ppm for Cx. pipiens, and 29.83 ppm for Ae. aegypti and differed significantly. None of the four C. erythraea essential oil fractions were active against mosquito larvae. Two CYP450 genes (CYP6M11 and CYP6N12) and one GST gene (GST-2) were significantly upregulated in Ae. aegypti larvae exposed to C. erythraea essential oil suggesting their potential involvement in metabolic pathways for C. erythraea essential oil. Essential oil emulsions produced with Hex-Am were more toxic than the whole essential oil while those produced with Na-Palm had similar toxicity as the whole essential oil. These findings demonstrate that C. erythraea essential oil is a promising source of mosquito larvicide and that the use of Hex-Am as an emulsifier can enhance the insecticidal properties of C. erythraea essential oil.

scholarly journals Callicarpa Species from Central Vietnam: Essential Oil Compositions and Mosquito Larvicidal Activities

Plants ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 113 ◽  
Author(s):  
Nguyen Huy Hung ◽  
Le Thi Huong ◽  
Nguyen Thanh Chung ◽  
Nguyen Thi Hoai Thuong ◽  
Prabodh Satyal ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Mosquito Control ◽  
Control Agent ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Compositions ◽  
Central Vietnam ◽  
Two Samples ◽  
Potential Alternative ◽  
Larvicidal Activities

There are around 140 species in the genus Callicarpa, with 23 species occurring in Vietnam. The Vietnamese Callicarpa species have been poorly studied. In this work, the leaf essential oils of C. bodinieri, C. candicans, C. formosana, C. longifolia, C. nudiflora, C. petelotii, C. rubella, and C. sinuata, have been obtained from plants growing in central Vietnam. The chemical compositions of the essential oils were determined using gas chromatography – mass spectrometry. Mosquito larvicidal activities of the essential oils were carried out against Aedes aegypti. All of the Callicarpa leaf essential oils showed larvicidal activity, but two samples of C. candicans were particularly active with 48-h LC50 values of 2.1 and 3.8 μg/mL. Callicarpa candicans essential oil should be considered as a potential alternative mosquito control agent.

scholarly journals Fumigant Toxicity of Petroselinum Crispum L. (Apiaceae) Essential Oil on Trialeurodes Vaporariorum (Westwood) (Hemiptera: Aleyrodidae) Adults Under Greenhouse Conditions

2014 ◽  
Vol 54 (3) ◽  
pp. 294-299 ◽  
Author(s):  
Leila Mahmoodi ◽  
Oroj Valizadegan ◽  
Vahid Mahdavi
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Ornamental Plants ◽  
Trialeurodes Vaporariorum ◽  
Plant Viruses ◽  
Petroselinum Crispum ◽  
Fumigant Toxicity ◽  
Plant Oil ◽  
Plant Essential Oils ◽  
Greenhouse Crops

Abstract Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) is one of the most harmful, world-wide known pests of greenhouse crops and ornamental plants. This insect feeds on plant sap, produces honeydew, and transmits plant viruses, while causing quantitative and qualitative damage to plants. For controlling this pest in greenhouses, plant essential oils are used as an alternative to chemical insecticidal. So in this study, fumigant toxicity of Petroselinum crispum L. (Apiaceae) plant oil on the abovementioned adult pest was investigated. Dry seeds were ground and subjected to hydrodistillation using a modified Clevenger-type apparatus and the resulting oil contained myristicin (42.65%), β-phellandrene (21.83%), p-1,3,8-menthatriene (9.97%), and β-myrcene (4.25%). All bioassay tests were conducted at 27±2°C, 65±5% relative humidity (RH) and at a photoperiod of 16 : 8 h (light : dark). This research was performed in a completely randomised design with six treatments (five different concentrations of essential oils plus the control). Each concentration included three replicates and each replicate consisted of 20 adult pests. The results showed that the aforementioned essential oil showed significant mortality of adults 24 h after exposure. The value LC50 of the mentioned plant oil on T. vaporariorum was 2.41 μl/l air. And mortality percentage showed higher sensitivity of T. vaporariorum against the application of the essential oil. The value LT50 estimated for T. vaporariorum in a concentration of 2.41 μl/l air was 8.17 h. The fumigant toxicity of this essential oil had an ordered relationship with the concentration and time exposure. The results of this research showed that the mentioned plant oil had appropriate insecticidal effects on these greenhouse pests. The findings showed that P. crispum oil had a high impact on the above-mentioned pest, and its use is suggested because of its high potential fumigant toxicity. The oil of P. crispum may be used in integrated pest management programmes in greenhouses.

scholarly journals EFFECT OF SOME NATURAL PLANTS OILS ON THE GROWTH OF SOME PATHOGENIC BACTERIA

2019 ◽  
Vol 2 (3) ◽  
pp. 1-19
Author(s):  
Alsanussi Ahmed Ali Albi
Keyword(s):  
Staphylococcus Aureus ◽  
Essential Oil ◽  
Essential Oils ◽  
Control Sample ◽  
Storage Period ◽  
E Coli ◽  
Level 1 ◽  
Black Seeds ◽  
Minced Meat ◽  
Zero Time

This study aimed to determine the influence some of essential oils (black seed oil, garlic oil, and thyme oil on the Growth of some Pathogenic Bacteria (psychotropic bacterial, E.coli, Salmonella and Staphylococcus aureus. The results showed:- All treatments had positive effect on the bacterial growth; the treatment of black seed was the highest effective when compared with other treatments. changes of psychrotrophic bacterial count in minced meat treated with essential oils during storage at 4°C for 20 day. Microorganisms that grow in food at refrigeration temperature have usually been called psychotropic. Many psychotropic bacteria when present in large numbers can cause a variety of off–flavors as well as physical and defects in foods, Psychrophilic bacteria counts in all treatments at zero time were similar, but there is a significant increase in control sample to 107 log CFU/gm. At the end of storage periods (p≥ 0.05) Psychotropic bacteria counts reduced with addition of essential oils compared with control samples. Changes of E. coli count in minced meat treated with essential oils during storage at 4°C for 20 day. Although the total bacterial count was used in bacteriological examination to reflect the hygienic quality, however, it is evident that coliform group count is considered of much greater value in assessing its quality. It was found that control sample had significantly (p≥ 0.05) difference the higher counts E. coli when compared to other treatments which formulated with essential oils at levels 0.50 and 0.75 % and 1% at zero time and at end of storage periods. Essential oil of black seeds at level 1%was more active of inhibiting effect against coliform group bacteria, which disappear after 10 days of storage period compared with other essential oils. Also, E. coli group disappeared in most minced meat samples formulated with essential oil at level 1% at 15 and 20 days. Changes of Salmonella counts in minced meat treated with essential oils during storage at 4°C for 20 day. Salmonella is now established, as one of the most important causes of food – borne illness at worldwide. It was found that control sample had significant (p≥ 0.05) difference from the higher counts of Salmonella when compared to other treatments which formulated with essential oils at levels 0.50 and 0.75% and 1% at end of storage periods. Essential oil of black seed at level 1% was more active of inhibiting effect against Salmonella group bacteria, which disappeared after 5 days of storage period compared with other essential oils. Also, it could be noticed that Salmonella group disappeared from most minced beef samples formulated with essential oil at levels 0.75% and 1% after10 and 15days. Changes of Staphylococcus Aureus counts in minced meat treated with essential oils during storage at 4°C for 20 day: The results showed that Staphylococcus aureus counts increased in control sample, so the Staphylococcus aureus count at zero time was 3.3 102 CFU/g, but reached to 5.4 103 CFUI /g at the end of storage period. It could be noticed that Staphylococcus aureus counts were significantly (p≥ 0.05) decreased during storage time in minced meet sample contained essential oil of black seeds at level 0.75% and 1%. Staphylococcus aureus counts in these samples were less than that in control sample. Meanwhile, after storage for 5 days, Staphylococcus aureus disappeared from minced meet samples contained black seeds essential oil at level 1%.

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