Toxicity of essential oil compounds against Exorista sorbillans (Diptera: Tachinidae), a parasitoid of silkworm

2011 ◽  
Vol 10 (85) ◽  
Author(s):  
Khanikor, B.
Keyword(s):  
Essential Oil ◽  
Exorista Sorbillans ◽  
Essential Oil Compounds

scholarly journals Anti-biofilm and Virulence Factor-Reducing Activities of Essential Oils and Oil Components as a Possible Option for Bacterial Infection Control

Planta Medica ◽  
2020 ◽  
Vol 86 (08) ◽  
pp. 520-537 ◽  
Author(s):  
Jürgen Reichling
Keyword(s):  
Quorum Sensing ◽  
Essential Oil ◽  
Essential Oils ◽  
Virulence Factor ◽  
Model Organisms ◽  
Regulation System ◽  
Expression Of Genes ◽  
Reporter Strains ◽  
Violacein Production ◽  
Essential Oil Compounds

AbstractPathogenic biofilm-associated bacteria that adhere to biological or nonbiological surfaces are a big challenge to the healthcare and food industries. Antibiotics or disinfectants often fail in an attempt to eliminate biofilms from those surfaces. Based on selected experimental research, this review deals with the potential biofilm-inhibiting, virulence factor-reducing, and biofilm-eradicating activities of essential oils and single essential oil compounds using Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Chromobacterium violaceum as model organisms. In addition, for the bacteria reviewed in this overview, different essential oils and essential oil compounds were reported to be able to modulate the expression of genes that are involved in the formation of autoinducer molecules, biofilms, and virulence factors. The anti-quorum sensing activity of some essential oils and single essential oil compounds was demonstrated using the gram-negative bacterium C. violaceum. Reporter strains of this bacterium produce the violet-colored compound violacein whose synthesis is regulated by quorum sensing autoinducer molecules called acylhomeserinlactones. Of great interest was the discovery that enantiomeric monoterpenes affected the quorum sensing regulation system in different ways. While the (+)-enantiomers of carvone, limonene, and borneol increased violacein formation, their (−)-analogues inhibited violacein production.For the successful eradication of biofilms and the bacteria living inside them, it is absolutely necessary that the lipophilic volatile substances can penetrate into the aqueous channels of biofilms. As shown in recent work, hydrophilic nano-delivery systems encapsulating essential oils/essential oil compounds with antibacterial effects may contribute to overcome this problem.

Effects of Foeniculum vulgare essential oil compounds, fenchone and limonene, on experimental wound healing

2017 ◽  
Vol 92 (4) ◽  
pp. 274-282 ◽  
Author(s):  
I Keskin ◽  
Y Gunal ◽  
S Ayla ◽  
B Kolbasi ◽  
A Sakul ◽  
...  
Keyword(s):  
Wound Healing ◽  
Essential Oil ◽  
Foeniculum Vulgare ◽  
Essential Oil Compounds

Essential oil compounds in a historical sample of marjoram (Origanum majorana L., Lamiaceae)

2002 ◽  
Vol 17 (3) ◽  
pp. 175-180 ◽  
Author(s):  
Johannes Novak ◽  
Jan Langbehn ◽  
Friedrich Pank ◽  
Chlodwig M. Franz
Keyword(s):  
Essential Oil ◽  
Historical Sample ◽  
Origanum Majorana ◽  
Essential Oil Compounds

Chemotaxonomic value of the essential oil compounds in species of Teucrium pumilum aggregate

2000 ◽  
Vol 55 (5) ◽  
pp. 397-401 ◽  
Author(s):  
Isabel Pérez ◽  
Maria Amparo Blázquez ◽  
Herminio Boira
Keyword(s):  
Essential Oil ◽  
Essential Oil Compounds

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 Chemometrics Application for Grouping and Determinating Volatile Compound which related to Antioxidant Activity of Turmeric Essential Oil (Curcuma longa L)

2020 ◽  
pp. 1
Author(s):  
Rosy Islamadina ◽  
Adelin Can ◽  
Abdul Rohman
Keyword(s):  
Antioxidant Activity ◽  
Essential Oil ◽  
Curcuma Longa ◽  
Principal Component ◽  
Correlated Variables ◽  
And Cluster Analysis ◽  
The Relationship ◽  
Essential Oil Compounds ◽  
Chemical Contents

Turmeric essential oil is known to have antioxidant activity. Various in vitro antioxidantactivity assays has been carried out. Related to this research, it tries to examine the antioxidantpotential of turmeric essential oil and see the composition that is responsible for antioxidant activitycombine with chemometrics. The research method used was a narrative review of 60 articlesobtained from several databases. The review conducted on profiling essential oil compounds thatidentified using GC-MS and evaluation of the antioxidant activity of turmeric essential oil with themost commonly used method including scavenging radical 2,2 diphenyl-1-picrylhydrazyl (DPPH)and 2,2-azinobis (3-ethylbenzothiazoline-6 sulfonic acid (ABTS). Analysis methods used forgrouping various multivariate data subjects and determaining the relationship between thevariables were Principal Component Analysis (PCA) and Cluster Analysis (CA). According to thereview, turmeric essential oils are proven to have potential antioxidant activity and have variationsin chemical contents. PCA was success for grouping subjects with various correlated variables,determining variables wich the most influential and correlation between variables. CA method canbe used to group samples without requiring mutually correlated variables.

Preservative effect of combined treatment with electrolyzed NaCl solutions and essential oil compounds on carp fillets during convectional air-drying

2006 ◽  
Vol 106 (3) ◽  
pp. 331-337 ◽  
Author(s):  
Barakat S.M. Mahmoud ◽  
Koji Yamazaki ◽  
Kazuo Miyashita ◽  
Yuji Kawai ◽  
Il-Shik Shin ◽  
...  
Keyword(s):  
Essential Oil ◽  
Combined Treatment ◽  
Air Drying ◽  
Essential Oil Compounds

Dairy matrix effect on the transference of rosemary (Rosmarinus officinalis) essential oil compounds during cheese making

2014 ◽  
Vol 95 (7) ◽  
pp. 1507-1513 ◽  
Author(s):  
Armando Moro ◽  
Celia M Librán ◽  
M Isabel Berruga ◽  
Manuel Carmona ◽  
Amaya Zalacain
Keyword(s):  
Essential Oil ◽  
Matrix Effect ◽  
Rosmarinus Officinalis ◽  
Cheese Making ◽  
Essential Oil Compounds

A NOVEL METHOD FOR EXTRACTION OF ESSENTIAL OIL COMPOUNDS FROM FOENICULUM VULGARE MILL. FRUITS

2019 ◽  
Vol 22 (5) ◽  
Author(s):  
Н.Н. Бойко ◽  
Д.И. Писарев ◽  
Е.Т. Жилякова ◽  
А.Ю. Малютина ◽  
О.О. Новиков
Keyword(s):  
Essential Oil ◽  
Foeniculum Vulgare ◽  
Novel Method ◽  
Essential Oil Compounds

scholarly journals Antibacterial Activity of Selected Essential Oil Compounds Alone and in Combination with β-Lactam Antibiotics Against MRSA Strains

2020 ◽  
Vol 21 (19) ◽  
pp. 7106
Author(s):  
Paweł Kwiatkowski ◽  
Łukasz Łopusiewicz ◽  
Agata Pruss ◽  
Mateusz Kostek ◽  
Monika Sienkiewicz ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Essential Oil ◽  
Reference Strain ◽  
Meca Gene ◽  
Treatment Method ◽  
Molecular Techniques ◽  
Additive Effect ◽  
Penicillin G ◽  
Mrsa Strains ◽  
Essential Oil Compounds

This study aimed to determine the effect of selected essential oil compounds (EOCs) on the antibacterial activity of β-lactam antibiotics (βLAs) against methicillin-resistant Staphylococcus aureus (MRSA) strains. The following parameters were studied: antibiotic susceptibility testing, detection of mecA gene and evaluation of genotypic relativity of isolates using molecular techniques, analysis of chemical composition applying Fourier-transform infrared (FTIR) spectroscopy, and determination of antibacterial activity of EOCs alone and in combination with βLAs against MRSA strains using microdilution and checkerboard methods. It was found that all isolates expressed MRSA and resistance phenotypes for macrolides, lincosamides, and streptogramins B. All isolates harbored the mecA gene and belonged to three distinct genotypes. Eight of the 10 EOCs showed efficient antimicrobial activity against the MRSA reference strain. The analysis of interaction between EOCs and βLAs against the MRSA reference strain revealed a synergistic and additive effect of the following combinations: methicillin (Met)-linalyl acetate (LinAc), penicillin G (Pen)-1,8-cineole (Cin), and Pen-LinAc. Analysis of EOC-βLA interactions showed a synergistic and additive effect in the following combinations: Met-LinAc (against low- and high-level βLAs resistance strains), Pen-Cin, and Pen-LinAc (against low-level βLAs resistance strains). It was also confirmed that changes in phosphodiester, -OH, -CH2 and -CH3 groups may change the interactions with βLAs. Moreover, the presence of two CH3O- moieties in the Met molecule could also play a key role in the synergistic and additive mechanism of LinAc action with Met against MRSA strains. Direct therapy using a Met-LinAc combination may become an alternative treatment method for staphylococcal infections caused by MRSA. However, this unconventional therapy must be preceded by numerous cytotoxicity tests.

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