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https://www.readbyqxmd.com/read/28341256/the-ability-of-selected-plant-essential-oils-to-enhance-the-action-of-recommended-antibiotics-against-pathogenic-wound-bacteria
#1
Monika Sienkiewicz, Monika Łysakowska, Edward Kowalczyk, Grażyna Szymańska, Ewa Kochan, Jolanta Krukowska, Jurek Olszewski, Hanna Zielińska-Bliźniewska
The aim of this work was to characterize the ability of essential oils to support antibiotics against pathogenic bacteria in wounds. Gram-positive and Gram-negative bacteria obtained from wound infections were identified according to standard microbiological methods. Essential oils were analysed by GC-FID-MS. The susceptibility of bacteria to antibiotics, essential oils and their combination was assessed using the disc-diffusion method. The Minimal Inhibitory Concentration and Minimum Bactericidal Concentration of the essential oils were established by the micro-dilution broth method...
March 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28334192/insecticidal-properties-of-essential-oils-and-some-of-their-constituents-on-the-turkestan-cockroach-blattodea-blattidae
#2
Sudip Gaire, Mary O'Connell, Francisco O Holguin, Anup Amatya, Scott Bundy, Alvaro Romero
The Turkestan cockroach, Blatta lateralis (Walker), has become the most important peridomestic species in urban areas of the Southwestern United States. The aim of this study was to evaluate the use of botanical compounds to control this urban pest. We tested the acute toxicity and repellency of six botanical constituents and three essential oils on Turkestan cockroach nymphs. Chemical composition of the essential oils was also determined. Topical and fumigant assays with nymphs showed that thymol was the most toxic essential oil constituent, with a LD50 of 0...
March 3, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28316626/evaluation-of-phenolic-compounds-and-antioxidant-and-antimicrobial-activities-of-some-common-herbs
#3
Muhammad Abdul Qadir, Syeda Kiran Shahzadi, Asad Bashir, Adil Munir, Shabnam Shahzad
The study was designed to evaluate the phenolic, flavonoid contents and antioxidant and antimicrobial activities of onion (Allium cepa), garlic (Allium sativum), mint (Mentha spicata), thyme (Thymus vulgaris), oak (Quercus), aloe vera (Aloe barbadensis Miller), and ginger (Zingiber officinale). All extracts showed a wide range of total phenolic contents, that is, 4.96 to 98.37 mg/100 g gallic acid equivalents, and total flavonoid contents, that is, 0.41 to 17.64 mg/100 g catechin equivalents. Antioxidant activity (AA) was determined by measuring reducing power, inhibition of peroxidation using linoleic acid system, and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) scavenging activity...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28279391/the-effectiveness-of-thyme-honey-for-the-management-of-treatment-induced-xerostomia-in-head-and-neck-cancer-patients-a%C3%A2-feasibility-randomized-control-trial
#4
Andreas Charalambous, Ekaterini Lambrinou, Nicos Katodritis, Dimitrios Vomvas, Vasilios Raftopoulos, Morpho Georgiou, Lefkios Paikousis, Melanie Charalambous
PURPOSE: Radiation-induced xerostomia is one of the most common side effects that head and neck cancer patients experience during and after treatment. Despite the various methods for the prevention and treatment of radiation-induced xerostomia, it remains highly prevalent among patients treated for head and neck cancers negatively influencing their lives. The purpose of this study was to evaluate the effectiveness of thyme honey as a means for managing radiation-induced xerostomia. METHOD: This was a parallel randomised controlled trial with two equal arms, the experimental arm (thyme honey) and the control arm (saline)...
April 2017: European Journal of Oncology Nursing: the Official Journal of European Oncology Nursing Society
https://www.readbyqxmd.com/read/28278678/bioactivity-of-essential-oils-in-phytopathogenic-and-post-harvest-fungi-control
#5
M P Santamarina, M D Ibáñez, M Marqués, J Roselló, S Giménez, M A Blázquez
Commercial thyme and lavender essential oils were analysed by GC/MS. Sixty-six compounds accounting for 98.6-99.6% of total essential oil were identified. Thymol (52.14 ± 0.21%), followed by p-cymene (32.24 ± 0.16%), carvacrol (3.71 ± 0.01%) and γ-terpinene (3.34 ± 0.02%), were the main compounds in thyme essential oil, while large amounts of oxygenated monoterpenes linalool acetate (37.07 ± 0.24%) and linalool (30.16 ± 0.06%) were found in lavender one. In vitro antifungal activity of the essential oils was evaluated at 200 and 300 μg/mL against 10 phytopathogenic and post-harvest fungi, which significantly affect agriculture...
February 9, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28272922/all-natural-and-clean-label-preservatives-and-antimicrobial-agents-used-during-poultry-processing-and-packaging
#6
Ar'quette Grant, Salina Parveen
The poultry industry is faced with compounding pressures of maintaining product safety and wholesomeness while keeping up with consumer trends of all-natural foods and label accuracy. Consumers are increasingly demanding that their foods be minimally processed and contain compounds that are easily read and recognized, i.e., products must be clean labeled. The purpose of this review is to briefly describe several natural antimicrobial agents that can be incorporated into poultry processing. These compounds and their essential oils were included in this mini-review because they are generally recognized as safe by the U...
March 8, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28272803/thyme-oil-encapsulated-in-halloysite-nanotubes-for-antimicrobial-packaging-system
#7
Min Hyeock Lee, Hyun-Sun Seo, Hyun Jin Park
An antimicrobial capsule releasing thyme oil was developed using modified halloysite nanotubes (HNTs). In order to increase the pore volume, HNTs were treated with 5.0 mol/L NaOH solution, which resulted in the encapsulation of more thyme oil molecules inside the HNTs. The morphology of the raw HNTs and NaOH-treated HNTs (N-HNTs) was characterized using transmission electron microscopy and nitrogen adsorption-desorption analysis. The loading capacity increased from 180.7 ± 12.7 to 256.4 ± 16.7 mg thyme oil/g HNT after the NaOH treatment...
March 8, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28255862/investigation-of-thymol-effect-on-learning-and-memory-impairment-induced-by-intrahippocampal-injection-of-amyloid-beta-peptide-in-high-fat-diet-fed-rats
#8
Masoumeh Asadbegi, Parichehreh Yaghmaei, Iraj Salehi, Alireza Komaki, Azadeh Ebrahim-Habibi
Obesity and consumption of a high fat diet (HFD) are known to increase the risk of Alzheimer's disease (AD). In the present study, we have examined the protective and therapeutic effects of thymol (main monoterpene phenol found in thyme essential oil) on a HFD-fed rat model of AD. Fourty adult male Wistar rats were randomly assigned to 5 groups:(n = 8 rats/group): group 1, control, consumed an ordinary diet, group 2 consumed a HFD for 8 weeks, then received phosphate-buffered saline (PBS) via intrahippocampal (IHP) injection, group 3 consumed HFD for 8 weeks, then received beta-amyloid (Aβ)1-42 via IHP injections to induce AD, group 4 consumed HFD for 8 weeks, then received Aβ1-42, and was treated by thymol (30 mg/kg in sunflower oil) daily for 4 weeks, and group 5 consumed HFD for 8 week, then received Aβ1-42 after what sunflower oil was administered by oral gavage daily for 4 weeks...
March 2, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28254019/volatile-profile-in-the-accurate-labelling-of-monofloral-honey-the-case-of-lavender-and-thyme-honey
#9
Isabel Escriche, Lara Sobrino-Gregorio, Andrea Conchado, Marisol Juan-Borrás
The proliferation of hybrid plant varieties without pollen, such as lavender, has complicated the classification of specific types of honey. This study evaluated the correlation between the proclaimed type of monofloral honey (lavender or thyme) as appears on the label with the actual percentage of pollen. In addition, physicochemical parameters, colour, olfacto-gustatory profile, and volatile compounds were tested. All of the samples labelled as lavender were wrongly classified according to the usual commercial criteria (minimum 10% of pollen Lavandula spp...
July 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28249376/effects-of-a-specific-blend-of-essential-oils-on-apparent-nutrient-digestion-rumen-fermentation-and-rumen-microbial-populations-in-sheep-fed-a-50-50-alfalfa-hay-concentrate-diet
#10
N Khateri, O Azizi, H Jahani-Azizabadi
OBJECTIVE: An experiment was conducted to investigate the effects of a specific mixture of essential oils (MEO), containing thyme, clove and cinnamon EO, on rumen microbial fermentation, nutrient apparent digestibility and blood metabolites in fistulated sheep. METHODS: Six sheep fitted with ruminal fistulas were used in a repeated measurement design with two 24-d periods to investigate the effect of adding MEO at 0 (control), 0.8, and 1.6 mL/d on apparent nutrient digestibility, rumen fermentation characteristics, rumen microbial population and blood chemical metabolites...
March 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28242927/evaluation-of-anti-oxidant-and-anti-microbial-activity-of-various-essential-oils-in-fresh-chicken-sausages
#11
Heena Sharma, S K Mendiratta, Ravi Kant Agarwal, Sudheer Kumar, Arvind Soni
The present study was undertaken to evaluate antimicrobial and antioxidant effect of essential oils on the quality of fresh (raw, ready to cook) chicken sausages. Several preliminary trials were carried out to optimize the level of four essential oils viz., clove oil, holybasil oil, thyme oil and cassia oil and these essential oils were incorporated at 0.25, 0.125, 0.25 and 0.125%, respectively in fresh chicken sausages. Quality evaluation and detailed storage stability studies were carried out for fresh chicken sausages for 20 days at refrigeration temperature (4 ± 1 °C)...
February 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28231164/essential-oil-characterization-of-thymus-vulgaris-from-various-geographical-locations
#12
Prabodh Satyal, Brittney L Murray, Robert L McFeeters, William N Setzer
Thyme (Thymus vulgaris L.) is a commonly used flavoring agent and medicinal herb. Several chemotypes of thyme, based on essential oil compositions, have been established, including (1) linalool; (2) borneol; (3) geraniol; (4) sabinene hydrate; (5) thymol; (6) carvacrol, as well as a number of multiple-component chemotypes. In this work, two different T. vulgaris essential oils were obtained from France and two were obtained from Serbia. The chemical compositions were determined using gas chromatography-mass spectrometry...
October 27, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231152/antimicrobial-active-packaging-including-chitosan-films-with-thymus-vulgaris-l-essential-oil-for-ready-to-eat-meat
#13
Jesús Quesada, Esther Sendra, Casilda Navarro, Estrella Sayas-Barberá
An active packaging system has been designed for the shelf life extension of ready to eat meat products. The package included an inner surface coated with a chitosan film with thyme essential oil (0%, 0.5%, 1%, and 2%) not in direct contact with the meat. Our aim was to reduce the impact of thyme essential oil (EO) on meat sensory properties by using a chemotype with low odor intensity. The pH, color parameters, microbial populations, and sensory properties were assessed during 4 weeks of refrigerated storage...
August 29, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28210216/flavor-dependent-retention-of-remote-food-preference-memory
#14
Aditya Singh, Suraj Kumar, Vikram Pal Singh, Asish Das, J Balaji
Social Transmission of Food Preference (STFP) is a single trial non-aversive learning task that is used for testing non-spatial memory. This task relies on an accurate estimate of a change in food preference of the animals following social demonstration of a novel flavor. Conventionally this is done by providing two flavors of powdered food and later estimating the amount of food consumed for each of these flavors in a defined period of time. This is achieved through a careful measurement of leftover food for each of these flavors...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28209457/metabolomic-approach-reveals-the-biochemical-mechanisms-underlying-drought-stress-tolerance-in-thyme
#15
Parviz Moradi, Brian Ford-Lloyd, Jeremy Pritchard
Thyme as a perennial herb has been recognized globally for its antimicrobial, antiseptic and spasmolytic effects. In this investigation, we have used non-targeted metabolite and volatile profiling combined with the morpho-physiological parameters in order to understand the responses at the metabolite and physiological level in drought sensitive and tolerant thyme plant populations. The results at the metabolic level identified the significantly affected metabolites. Significant metabolites belonging to different chemical classes consisting amino acids, carbohydrates, organic acids and lipids have been compared in tolerant and sensitive plants...
February 14, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28135780/thyme-essential-oil-as-an-alternative-mechanism-biofungicide-causing-sensitivity-of-mycosphaerella-graminicola
#16
M Ben Jabeur, L Somai-Jemmali, W Hamada
AIMS: To understand the mode of action of thyme essential oil as an alternative biofungicide. METHODS AND RESULTS: The chemical composition of thyme essential oil isolated by hydrodistillation from the aerial parts of Thymus vulgaris was analyzed. The main constituents of thyme essential oil were thymol (76·96%), ρ-cymene (9·89%), γ-terpinene (1·92%) and caryophyllene oxide (1·69%). The antifungal activity of the oil and its pure major component (thymol) was assessed by the in vitro assay against Mycosphaerella graminicola...
April 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28068841/listeria-monocytogenes-behaviour-and-quality-attributes-during-sausage-storage-affected-by-sodium-nitrite-sodium-lactate-and-thyme-essential-oil
#17
Carla María Blanco-Lizarazo, Rubén Betancourt-Cortés, Angélica Lombana, Katerine Carrillo-Castro, Indira Sotelo-Díaz
The effects of the addition of nitrite at 200 ppm (N), sodium lactate 1.5% (L) and thyme essential oil at 100 ppm (T1) on Listeria monocytogenes behaviour and ATPase activity inhibition were evaluated, as well as lipid oxidation through the quantification of malonaldehydes, in sausage stored at 8 ℃ for 41 days and at 30 ℃ for 14 days. The changes in the colour profile were performed during storage time at 8 ℃. Quantitative descriptive sensory analyses were performed after two days at 4 ℃...
January 1, 2017: Food Science and Technology International, Ciencia y Tecnología de Los Alimentos Internacional
https://www.readbyqxmd.com/read/28063268/evaluation-of-the-quality-of-herbal-teas-by-dart-tof-ms
#18
Jana Prchalová, František Kovařík, Aleš Rajchl
The paper focuses on the optimization, settings and validation of direct analysis in real time (DART) coupled with time of flight detector (TOF) when used for the evaluation of the quality of selected herbal teas (fennel, chamomile, nettle, linden, peppermint, thyme, lemon balm, marigold, sage, rose hip, St. John's Wort). The ionization mode, the optimal ionization temperature and the type of solvent for sample extraction were optimized. The characteristic compounds of the analysed herbal teas (glycosides, flavonoids, phenolic and terpenic substances, such as chamazulene, anethole, menthol, thymol, salviol, hypericin etc...
January 7, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/27994215/antimicrobial-activity-of-basil-oregano-and-thyme-essential-oils
#19
REVIEW
Hercules Sakkas, Chrissanthy Papadopoulou
For centuries plants have been used for a wide variety of purposes, from treating infectious diseases to food preservation and perfume production. Presently, the increasing resistance of microorganisms to currently used antimicrobials in combination with the appearance of emerging diseases requires urgently the development of new, more effective drugs. Plants, due to the large biological and structural diversity of their components, constitute a unique and renewable source for the discovery of new antibacterial, antifungal and antiparasitic treatments...
December 20, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27987818/antioxidant-edible-films-based-on-chitosan-and-starch-containing-polyphenols-from-thyme-extracts
#20
Emma Talón, Kata T Trifkovic, Viktor A Nedovic, Branko M Bugarski, María Vargas, Amparo Chiralt, Chelo González-Martínez
The aim of this study was to analyse the antioxidant activity of different polymeric matrices based on chitosan and starch, incorporating a thyme extract (TE) rich in polyphenols. TE provided the films with remarkable antioxidant activity. When mixed with chitosan, the polyphenols interacted with the polymer chains, acting as crosslinkers and enhancing the tensile behaviour of films. The opposite effect was observed when incorporated into the starch matrix. All the films became darker, more reddish and less transparent when TE was incorporated...
February 10, 2017: Carbohydrate Polymers
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