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oregano oil

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https://www.readbyqxmd.com/read/29211890/effect-of-oregano-oil-and-tannic-acid-combinations-on-the-quality-and-sensory-characteristics-of-cooked-chicken-meat
#1
M Al-Hijazeen, A Mendonca, E J Lee, D U Ahn
The antioxidant effects of oregano essential oil and tannic acid combinations on ground chicken breast and thigh meats were studied. Six treatments, including: 1) control (none added), 2) 100 ppm oregano essential oil + 5 ppm tannic acid, 3) 100 ppm oregano essential oil + 10 ppm tannic acid, 4) 200 ppm oregano essential oil + 5 ppm tannic acid, 5) 200 ppm oregano essential oil + 10 ppm tannic acid, and 6) 5 ppm butylated hydroxyanisole (BHA) for breast or 14 ppm for thigh meat, were prepared. Cooked meat samples were individually vacuum-packaged in oxygen-impermeable vacuum bags and then cooked in-bag to an internal temperature of 75°C...
December 2, 2017: Poultry Science
https://www.readbyqxmd.com/read/29191726/essential-oils-of-culinary-herbs-and-spices-display-agonist-and-antagonist-activities-at-human-aryl-hydrocarbon-receptor-ahr
#2
Iveta Bartoňková, Zdeněk Dvořák
Essential oils (EOs) of culinary herbs and spices are used to flavor, color and preserve foods and drinks. Dietary intake of EOs is significant, deserving an attention of toxicologists. We examined the effects of 31 EOs of culinary herbs and spices on the transcriptional activity of human aryl hydrocarbon receptor (AhR), which is a pivotal xenobiotic sensor, having also multiple roles in human physiology. Tested EOs were sorted out into AhR-inactive ones (14 EOs) and AhR-active ones, including full agonists (cumin, jasmine, vanilla, bay leaf), partial agonists (cloves, dill, thyme, nutmeg, oregano) and antagonists (tarragon, caraway, turmeric, lovage, fennel, spearmint, star anise, anise)...
November 27, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29175764/the-effect-of-essential-oils-on-microbial-composition-and-quality-of-grass-carp-ctenopharyngodon-idellus-fillets-during-chilled-storage
#3
Zhan Huang, Xiaochang Liu, Shiliang Jia, Longteng Zhang, Yongkang Luo
Antimicrobial and antioxidant effects of essential oils (oregano, thyme, and star anise) on microbial composition and quality of grass carp fillets were investigated. Essential oils treatment was found to be effective in inhibiting microbial growth, delaying lipid oxidation, and retarding the increase of TVB-N, putrescine, hypoxanthine, and K-value. Based on sensory analysis, shelf-life of grass carp fillets was 6days for control and 8days for treatment groups. Among the essential oils, oregano essential oil exhibited the highest antimicrobial and antioxidant activities...
November 6, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29163441/antifungal-and-anti-biofilm-activity-of-essential-oil-active-components-against-cryptococcus-neoformans-and-cryptococcus-laurentii
#4
Poonam Kumari, Rutusmita Mishra, Neha Arora, Apurva Chatrath, Rashmi Gangwar, Partha Roy, Ramasare Prasad
Cryptococcosis is an emerging and recalcitrant systemic infection occurring in immunocompromised patients. This invasive fungal infection is difficult to treat due to the ability of Cryptococcus neoformans and Cryptococcus laurentii to form biofilms resistant to standard antifungal treatment. The toxicity concern of these drugs has stimulated the search for natural therapeutic alternatives. Essential oil and their active components (EO-ACs) have shown to possess the variety of biological and pharmacological properties...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29155281/effect-of-oregano-essential-oil-and-carvacrol-on-cryptosporidium-parvum-infectivity-in-hct-8-cells
#5
Shashank Gaur, Theresa B Kuhlenschmidt, Mark S Kuhlenschmidt, Juan E Andrade
Cryptosporidium parvum is the second leading cause of persistent diarrhea among children in low-resource settings. This study examined the effect of oregano essential oil (OEO) and carvacrol (CV) on inhibition of C. parvum infectivity in vitro. HCT-8 cells were seeded (1×10(6)) in 96-well microtiter plates until confluency. Cell viability and infectivity were assessed by seeding HCT-8 cell monolayers with C. parvum oocysts (1×10(4)) in two modalities: 1) 4h co-culture with bioactive (0-250μg/mL) followed by washing and incubation (48h, 37°C, 5% CO2) in bioactive-free media; and 2) 4h co-culture of C...
November 15, 2017: Parasitology International
https://www.readbyqxmd.com/read/29127810/antimicrobial-activities-of-gaseous-essential-oils-against-listeria-monocytogenes-on-a-laboratory-medium-and-radish-sprouts
#6
Gyeongmin Lee, Yoonbin Kim, Hoikyung Kim, Larry R Beuchat, Jee-Hoon Ryu
The aim of this study was to evaluate the antimicrobial activities of gaseous essential oils (EO gases) against Listeria monocytogenes on the surfaces of a laboratory medium and radish sprouts. We determined the minimal inhibitory concentration (MIC) and minimal lethal concentration (MLC) values of EO gases from eight EOs extracted from basil leaves, carrot seed, cinnamon bark, cinnamon leaves, clove flower buds, oregano leaves, thyme flowers (linalool), and thyme leaves (thymol) against L. monocytogenes on a nutrient agar supplemented with 1% glucose and 0...
November 4, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29125568/chemical-composition-of-herbal-macerates-and-corresponding-commercial-essential-oils-and-their-effect-on-bacteria-escherichia-coli
#7
Marietta Białoń, Teresa Krzyśko-Łupicka, Agnieszka Pik, Piotr P Wieczorek
This study addresses the chemical composition of some commercial essential oils (clove, juniper, oregano, and marjoram oils), as well as appropriate herbal extracts obtained in the process of cold maceration and their biological activity against selected Escherichia coli strains: E. coli ATTC 25922, E. coli ATTC 10536, and E. coli 127 isolated from poultry waste. On the basis of the gas chromatography-mass spectrometry (GCMS) analysis, it was found that the commercial essential oils revealed considerable differences in terms of the composition and diversity of terpenes, terpenoids and sesquiterpenes as compared with the extracts obtained from plant material...
November 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29105634/essential-oils-showing-in-vitro-anti-mrsa-and-synergistic-activity-with-penicillin-group-of-antibiotics
#8
Bushra Uzair, Naheed Niaz, Asma Bano, Barkat Ali Khan, Naheed Zafar, Muhammad Iqbal, Riffat Tahira, Fehmida Fasim
This study was planned in order to investigate effective essential oils to inhibit in-vitro growth of Methicillin resistant Staphylococcus aureus (MRSA). In this study using disc diffusion method anti MRSA activity of ten diverse essential oils extracted from traditional plants namely Thymus vulgaris L, Mentha pulegium, Ocimum sanctum, Mentha piperita, Cymbopogon citratus, Rosmarinus officinalis L., Cortex cinnamom, Citrus nobilis x Citrus deliciosa, Origanum vulgare and Mentha sp. was examined. All the essential oils inhibited growth of S...
September 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29098578/antifungal-activity-of-essential-oils-on-two-venturia-inaequalis-strains-with-different-sensitivities-to-tebuconazole
#9
Jérôme Muchembled, Caroline Deweer, Karin Sahmer, Patrice Halama
The antifungal activity of seven essential oils (eucalyptus, clove, mint, oregano, savory, tea tree, and thyme) was studied on Venturia inaequalis, the fungus responsible for apple scab. The composition of the essential oils was checked by gas chromatography-mass spectrometry. Each essential oil had its main compound. Liquid tests were performed to calculate the IC50 of essential oils as well as their majority compounds. The tests were made on two strains with different sensitivities to tebuconazole: S755, the sensitive strain, and rs552, the strain with reduced sensitivity...
November 2, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29095492/antioxidant-stability-study-of-oregano-essential-oil-microcapsules-prepared-by-spray-drying
#10
Claudia M Asensio, Alejandro J Paredes, Maria P Martin, Daniel A Allemandi, Valeria Nepote, Nelson R Grosso
Release kinetics of the volatile compounds of oregano EO microcapsules and the relation with the antioxidant activity were studied. Different wall material (WM) to core (C) ratios (1:1 and 2:1; WM:C), addition of colloidal silicon dioxide (CSD); and different storage conditions: 23 °C (room temperature; R) and 4 °C (fridge temperature; F) were evaluated for 90 d. Volatile compounds, total phenolic content (TPC), free radical scavenging activity (FRSA), and Trolox equivalent antioxidant capacity (TEAC) were measured...
November 2, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/29077554/antifungal-properties-of-essential-oils-for-improvement-of-indoor-air-quality-a-review
#11
REVIEW
Harriet Whiley, Sharyn Gaskin, Tiffany Schroder, Kirstin Ross
Concerns regarding indoor air quality, particularly the presence of fungi and moulds, are increasing. The potential for essential oils to reduce, control or remove fungi, is gaining interest as they are seen as a "natural" alternative to synthetic chemical fungicides. This review examines published research on essential oils as a method of fungal control in indoor environments. It was difficult to compare the relative performances of essential oils due to differences in research methods and reporting languages...
October 27, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/29075628/selective-essential-oils-from-spice-or-culinary-herbs-have-high-activity-against-stationary-phase-and-biofilm-borrelia-burgdorferi
#12
Jie Feng, Shuo Zhang, Wanliang Shi, Nevena Zubcevik, Judith Miklossy, Ying Zhang
Although the majority of patients with acute Lyme disease can be cured with the standard 2-4 week antibiotic treatment, about 10-20% of patients continue suffering from chronic symptoms described as posttreatment Lyme disease syndrome. While the cause for this is debated, one possibility is that persister bacteria are not killed by the current Lyme antibiotics and remain active in the system. It has been reported that essential oils have antimicrobial activities and some have been used by patients with persisting Lyme disease symptoms...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29071233/effect-of-addition-of-antifungal-agents-on-physical-and-biological-properties-of-a-tissue-conditioner-an-in-vitro-study
#13
Pragati Rawat, Swatantra Agarwal, Siddhi Tripathi
Purpose: Tissue conditioners are used for healing of abused oral tissues. They may harbour microorganisms causing oral diseases such as candidiasis compromising the health of the patient. Also, addition of antifungal agents into tissue conditioner may alter its properties. This study compares the anti-fungal property and mechanical properties of tissue conditioner containing different antifungal agents. Methods: Three antifungal agents, one synthetic - fluconazole, and two natural - oregano oil and virgin coconut oil were added into the tissue conditioner (Viscogel) in different concentrations...
September 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29031968/pyrolysis-gas-chromatography-isotope-ratio-mass-spectrometry-for-monitoring-natural-additives-in-polylactic-acid-active-food-packages
#14
M Llana-Ruíz-Cabello, S Pichardo, N T Jiménez-Morillo, F J González-Vila, E Guillamón, J M Bermúdez, S Aucejo, A M Camean, J A González-Pérez
Compound-specific isotope analysis (CSIA) usually requires preparative steps (pretreatments, extraction, derivatization) to get amenable chromatographic analytes from bulk geological, biological or synthetic materials. Analytical pyrolysis (Py-GC/MS) can help to overcome such sample manipulation. This communication describe the results obtained by hyphenating analytical pyrolysis (Py-GC) with carbon isotope-ratio mass spectrometry (IRMS) for the analysis of a polylactic acid (PLA) a based bio-plastic extruded with variable quantities of a natural plant extract or oregano essential oil...
October 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29030881/effects-of-dietary-greek-oregano-origanum-vulgare-ssp-hirtum-supplementation-on-rumen-fermentation-enzyme-profile-and-microbial-communities-in-goats
#15
N Paraskevakis
This study was conducted to examine in vivo long-term effects of dietary dried oregano (Origanum vulgare ssp. hirtum) whole plant on rumen fermentation, enzyme profile and microbial communities. For this purpose, eight healthy, adult, non-lactating Alpine goats were kept in tie stalls equipped for individual feeding and randomly divided into two homogeneous groups: one fed 0.6 kg of a concentrate mixture and 0.6 kg of wheat straw without any supplementation and served as control group (CON) while the other group (OR) fed the same diet of CON but supplemented with 20 g of dried oregano plants (OPs) to provide daily dosage of 1 ml of essential oil (EO) per animal...
October 14, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/29029151/combined-toxicity-of-three-essential-oils-against-aedes-aegypti-diptera-culicidae-larvae
#16
Ephantus J Muturi, Jose L Ramirez, Kenneth M Doll, Michael J Bowman
Essential oils are potential alternatives to synthetic insecticides because they have low mammalian toxicity, degrade rapidly in the environment, and possess complex mixtures of bioactive constituents with multi-modal activity against the target insect populations. Twenty-one essential oils were initially screened for their toxicity against Aedes aegypti (L.) larvae and three out of the seven most toxic essential oils (Manuka, oregano, and clove bud essential oils) were examined for their chemical composition and combined toxicity against Ae...
November 7, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28990669/effect-of-thyme-oil-alginate-based-coating-on-quality-and-microbial-safety-of-fresh-cut-apples
#17
Sarengaowa, Wenzhong Hu, Aili Jiang, Zhilong Xiu, Ke Feng
BACKGROUND: Food preservation is critical for keeping fresh-cut products fresh, nutritious, safe, attractive and available for consumers. To improve the safety and quality of fresh-cut fruits, fifteen essential oils (EOs) were screened to test the antimicrobial activity against Listeria monocytogenes (LM), Salmonella typhimurium (ST), Staphylococcus aureus (SA) and Escherichia coli O157:H7 (EC O157:H7). The effect of alginate-based edible coating (EC) incorporating with different concentrations thyme oil on fresh-cut Red Fuji apples was investigated...
October 9, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28980415/carvacrol-rich-oregano-oil-and-thymol-rich-thyme-red-oil-inhibit-biofilm-formation-and-the-virulence-of-uropathogenic-escherichia-coli
#18
Jin-Hyung Lee, Yong-Guy Kim, Jintae Lee
AIMS: Urinary tract infections are caused primarily by uropathogenic Escherichia coli (UPEC), and indwelling catheters are usually colonized by UPEC biofilms tolerant to common antibiotics. Hence, UPEC biofilms pose a substantial challenge, and there is an urgent need for effective control strategies. METHODS AND RESULTS: In this study, 79 essential oils were screened for antibiofilm ability against UPEC. Components of active oils were identified, and their antibiofilm activities were also investigated using 96-well plates with crystal violet assay, scanning electron microscopy, and confocal laser scanning microscopy...
October 5, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28969843/toxic-and-repellent-activity-of-selected-monoterpenoids-thymol-carvacrol-and-linalool-against-the-castor-bean-tick-ixodes-ricinus-acari-ixodidae
#19
Mohaddeseh Abouhosseini Tabari, Mohammad Reza Youssefi, Filippo Maggi, Giovanni Benelli
The castor bean tick, Ixodes ricinus, is a species of medical and veterinary importance. The use of synthetic acaricides for tick control has led to development of resistance, residues in the environment and animal products, and public health concerns. In this regard, plant essential oils and their main constituents represent an appealing alternative strategy to combat ticks. The phenols thymol and carvacrol and the alcohol linalool are monoterpenoids occurring in essential oils of several aromatic and medicinal plants, such as thyme, oregano, savory, lavender and coriander...
October 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28952553/encapsulation-of-oregano-origanum-onites-l-essential-oil-in-%C3%AE-cyclodextrin-%C3%AE-cd-synthesis-and-characterization-of-the-inclusion-complexes
#20
Margarita Kotronia, Eleni Kavetsou, Sofia Loupassaki, Stefanos Kikionis, Stamatina Vouyiouka, Anastasia Detsi
The aim of the present work was to study the encapsulation of Origanum onites L. essential oil (oregano EO) in β-cyclodextrin (β-CD) inclusion complexes (ICs), using the co-precipitation method. The formed β-CD-oregano EO ICs were characterized by diverse methods, such as Dynamic Light Scattering (DLS), FT-IR spectroscopy, Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Nuclear Magnetic Resonance (NMR) spectroscopy and Scanning Electron Microscopy (SEM). UV-Vis spectroscopy was used for the determination of the inclusion efficacy and the study of the encapsulated oregano EO release profile...
September 9, 2017: Bioengineering
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