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https://www.readbyqxmd.com/read/29026857/repellency-effect-of-essential-oils-of-some-native-plants-and-synthetic-repellents-against-human-flea-pulex-irritans-siphonaptera-pulicidae
#1
Mohammad Bagher Ghavami, Fahimeh Poorrastgoo, Behrooz Taghiloo, Jamshid Mohammadi
BACKGROUND: Fleas are important vectors of human and animal disease, and control measures for protection against their bites and flea-borne diseases are necessary. METHODS: The essential oils (EOs) of four native medicinal plants, Ziziphora tenuiore, Myrtus communis, Achillea wilhelmsii and Mentha piperita were isolated by hydrodistillation technique and analyzed by GC-MC. The repellent activity of EOs and synthetic compounds, DEET and permethrin, were assayed on human subjects against field collected fleas...
March 2017: Journal of Arthropod-borne Diseases
https://www.readbyqxmd.com/read/29019091/preventive-and-therapeutic-effects-of-thymol-in-a-lipopolysaccharide-induced-acute-lung-injury-mice-model
#2
Limei Wan, Dongmei Meng, Hong Wang, Shanhe Wan, Shunjun Jiang, Shanshan Huang, Li Wei, Pengjiu Yu
Acute lung injury (ALI) is a life-threatening syndrome which causes a high mortality rate worldwide. In traditional medicine, lots of aromatic plants-such as some Thymus species-are used for treatment of various lung diseases including pertussis, bronchitis, and asthma. Thymol, one of the primary active constituent derived from Thymus vulgaris (thyme), has been reported to exhibit potent anti-microbial, anti-oxidant, and anti-inflammatory activities in vivo and in vitro. The present study aims to investigate the protective effects of thymol in lipopolysaccharide (LPS)-induced lung injury mice model...
October 10, 2017: Inflammation
https://www.readbyqxmd.com/read/28990669/effect-of-thyme-oil-alginate-based-coating-on-quality-and-microbial-safety-of-fresh-cut-apples
#3
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/28987365/anti-oxidant-activity-and-major-chemical-component-analyses-of-twenty-six-commercially-available-essential-oils
#4
Hsiao-Fen Wang, Kuang-Hway Yih, Chao-Hsun Yang, Keh-Feng Huang
This study analyzed 26 commercially available essential oils and their major chemical components to determine their antioxidant activity levels by measuring their total phenolic content (TPC), reducing power (RP), β-carotene bleaching (BCB) activity, trolox equivalent antioxidant capacity (TEAC), and 1,1-diphenyl-2-picrylhydrazyl free radical scavenging (DFRS) ability. The clove bud and thyme borneol essential oils had the highest RP, BCB activity levels, and TPC values among the 26 commercial essential oils...
October 2017: Journal of Food and Drug Analysis
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
#5
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
#6
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/28956853/lipidomics-unravels-the-role-of-leaf-lipids-in-thyme-plant-response-to-drought-stress
#7
Parviz Moradi, Atiyeh Mahdavi, Maryam Khoshkam, Marcello Iriti
Thymus is one of the best known genera within the Labiatae (Lamiaceae) family, with more than 200 species and many medicinal and culinary uses. The effects of prolonged drought on lipid profile were investigated in tolerant and sensitive thyme plants (Thymus serpyllum L. and Thymus vulgaris L., respectively). Non-targeted non-polar metabolite profiling was carried out using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry with one-month-old plants exposed to drought stress, and their morpho-physiological parameters were also evaluated...
September 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28930277/biological-activities-of-three-essential-oils-of-the-lamiaceae-family
#8
REVIEW
Gema Nieto
Herbs and spices have been used since ancient times to improve the sensory characteristics of food, to act as preservatives and for their nutritional and healthy properties. Herbs and spices are generally recognized as safe (GRAS) and are excellent substitutes for chemical additives. Essential oils are mixtures of volatile compounds obtained, mainly by steam distillation, from medicinal and aromatic plants. They are an alternative to synthetic additives for the food industry, and they have gained attention as potential sources for natural food preservatives due to the growing interest in the development of safe, effective, natural food preservation...
August 23, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930236/antibacterial-and-antifungal-activity-of-essential-oils-against-pathogens-responsible-for-otitis-externa-in-dogs-and-cats
#9
Valentina V Ebani, Simona Nardoni, Fabrizio Bertelloni, Basma Najar, Luisa Pistelli, Francesca Mancianti
Background: Essential oils (EOs) are recommended by some veterinarians to treat otitis externa in pets, but data about their efficacy in scientific literature are very scant. Methods: Nine commercial EOs, from roman chamomile (Anthemis nobilis L.), star anise (Illicium verum), lavender (Lavandula hybrida), litsea (Litsea cubeba (Lour.) Pers.), basil (Ocimum basilicum L.), oregano (Origanum vulgare L. subsp. hirticum), rosemary (Rosmarinus officinalis L.), clary sage (Salvia sclarea L.), and thyme (Thymus vulgaris L...
April 21, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930137/chemical-composition-cytotoxic-apoptotic-and-antioxidant-activities-of-main-commercial-essential-oils-in-palestine-a-comparative-study
#10
Mohammad A Al-Tamimi, Bob Rastall, Ibrahim M Abu-Reidah
Background: Essential oils (EOs) are complex mixtures of several components gifted with a wide array of biological activities. The present research was designed to evaluate whether commercial essential oils could be effective by examining their in vitro antioxidant, cytotoxic, and apoptotic properties of nine commercially available EOs in Palestine, namely, African rue, basil, chamomile, fennel, fenugreek, ginger, spearmint, sage, and thyme, and to assure their effective use. Methods: The cytotoxic activity was determined using HT29-19(A) non-muco secreting and HT29-muco secreting (MS) cell lines...
October 25, 2016: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28917847/release-of-polyphenols-from-starch-chitosan-based-films-containing-thyme-extract
#11
Emma Talón, Kata T Trifkovic, María Vargas, Amparo Chiralt, Chelo González-Martínez
The release kinetics of thyme extract polyphenols (TE) from chitosan (CH), pea starch (S) and CH:S blend films in different solvents was evaluated, as well as their antioxidant activity in each release media. Pure starch films showed the fastest delivery rate and the highest delivery ratio of polyphenols, although the corresponding release media exhibited the lowest antioxidant capacity. TE provided CH based films with remarkable antioxidant activity, despite the lower polyphenol release obtained in all solvents, due to the strong polyphenols-chitosan interactions...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28916454/anti-acanthamoeba-activity-of-tunisian-thymus-capitatus-essential-oil-and-organic-extracts
#12
Salma Saoudi, Ines Sifaoui, Nadia Chammem, María Reyes-Batlle, Atteneri López-Arencibia, Idaira Pacheco-Fernández, Verónica Pino, Moktar Hamdi, Ignacio A Jiménez, Isabel L Bazzocchi, José E Piñero, Jacob Lorenzo-Morales
Acanthamoeba species are free-living amoebae widely distributed in the environment and which cause serious human infections. The treatment of Acanthamoeba infections is always very difficult and not constantly effective. More efficient drugs against Acanthamoeba must be developed and medicinal plants can be useful in this case. Our research focused on the examination of the anti-Acanthamoeba activity of the essential oil and the ethanolic-aqueous extract from Thymus capitatus L. The essential oil showed best activity with an IC50 of 2...
September 12, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28915339/a-vapor-phase-assay-for-evaluating-the-antimicrobial-activities-of-essential-oils-against-bovine-respiratory-bacterial-pathogens
#13
S Amat, D Baines, T W Alexander
The objectives of this study were to develop a new assay for the evaluation of the antimicrobial activities of essential oils (EOs) in vapor-phase and to demonstrate the antimicrobial activities of commercial EOs against BRPs. To achieve the first objective, a microtube cap containing 100 μl of EO was embedded in an agar plate. An agar plug (diameter 13 mm) inoculated with a bacterial suspension containing10(8) CFU ml(-1) was then placed over the cap and incubated at 37 °C for 24 h. Subsequently, bacteria were recovered from the agar plug by immersion in 5 ml of broth for 10 min, followed by vortexing for 30 s, and the broths were then plated for enumeration...
September 15, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28911683/antibacterial-activity-and-interactions-of-plant-essential-oil-combinations-against-gram-positive-and-gram-negative-bacteria
#14
Cristina Anamaria Semeniuc, Carmen Rodica Pop, Ancuţa Mihaela Rotar
The aim of this study was to compare the antibacterial effects of several essential oils (EOs) alone and in combination against different Gram-positive and Gram-negative bacteria associated with food products. Parsley, lovage, basil, and thyme EOs, as well as their mixtures (1:1, v/v), were tested against Bacillus cereus, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Salmonella typhimurium. The inhibitory effects ranged from strong (thyme EO against E. coli) to no inhibition (parsley EO against P...
April 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28901261/spices-with-breast-cancer-chemopreventive-and-therapeutic-potentials-a-functional-foods-based-review
#15
Aliyu Muhammad, Mohammed Auwal Ibrahim, Ochuko Lucky Erukainure, Ibrahim Malami, Auwal Adamu
Cancer is a disease that affects a significant number of both rural and urban dwellers. Among the various types of cancer, breast cancer is one of the most common diagnosed cancers among females. Its menace can be curbed with locally consumed spices due to their multiple bioactive phytochemicals. This review focuses on the breast cancer chemopreventive and therapeutic potentials of locally consumed spices. The most commonly consumed spices with breast cancer chemopreventive and chemotherapeutic phytochemical include pepper, onions, ginger, garlic, curry and thyme containing many biologically active metabolites ranging from vitamins, fatty acids esters, polyphenols/phenolics, sulfur-containing compounds and anthraquinones with proven antioxidant, anti-inflammatory, immuno-modulatory, antitumor and anticancer properties against breast cancer/carcinogenesis...
September 12, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28885706/halloysite-nanocapsules-containing-thyme-essential-oil-preparation-characterization-and-application-in-packaging-materials
#16
Si-Hoon Jang, So-Ri Jang, Gyeong-Min Lee, Jee-Hoon Ryu, Su-Il Park, No-Hyung Park
Halloysite nanotubes (HNTs), which are natural nanomaterials, have a hollow tubular structure with about 15 nm inner and 50 nm outer diameters. Because of their tubular shape, HNTs loaded with various materials have been investigated as functional nanocapsules. In this study, thyme essential oil (TO) was encapsulated successfully in HNTs using vacuum pulling methods, followed by end-capping or a layer-by-layer surface coating process for complete encapsulation. Nanocapsules loaded with TO were mixed with flexographic ink and coated on a paper for applications as food packaging materials...
September 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28858228/health-promoting-effects-of-thymus-herba-barona-thymus-pseudolanuginosus-and-thymus-caespititius-decoctions
#17
Andrea F Afonso, Olívia R Pereira, Rodrigo T Neto, Artur M S Silva, Susana M Cardoso
Thymus herba-barona, Thymus pseudolanuginosus, and Thymus caespititius decoctions were screened for their phenolic constituents, along with their potential antioxidant, anti-inflammatory, and antibacterial activities. The total phenolic compounds in the extracts of the three plants ranged from 236.0 ± 26.6 mgGAE/g (T. caespititus) to 293.0 ± 30.5 mgGAE/g of extract (T. pseudolanuginosus), being particularly rich in caffeic acid derivatives, namely rosmarinic acid and its structural isomers, as well as flavones, such as luteolin-O-glucuronide...
August 31, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28841125/spectroscopy-applied-to-feed-additives-of-the-european-union-reference-laboratory-a-valuable-tool-for-traceability
#18
Jone Omar, Boleslaw Slowikowski, Ana Boix, Christoph von Holst
Feed additives need to be authorised to be placed on the market according to Regulation (EU) No. 1831/2003. Next to laying down the procedural requirements, the regulation creates the European Union Reference Laboratory for Feed Additives (EURL-FA) and requires that applicants send samples to the EURL-FA. Once authorised, the characteristics of the marketed feed additives should correspond to those deposited in the sample bank of the EURL-FA. For this purpose, the submitted samples were subjected to near-infrared (NIR) and Raman spectroscopy for spectral characterisation...
August 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/28832836/microencapsulation-of-essential-thyme-oil-by-spray-drying-and-its-antimicrobial-evaluation-against-vibrio-alginolyticus-and-vibrio-parahaemolyticus
#19
O Tomazelli, F Kuhn, P J M Padilha, L R M Vicente, S W Costa, A A Boligon, J Scapinello, C N Nesi, J Dal Magro, S Lamo Castellví
The aims of this research were first, to evaluate the antibacterial potential of commercial thyme essential oil against V. alginolyticus and V. parahaemolyticys and second, using the spray drying technique to produce microcapsules. chemical compounds of thyme oil and microcapsules were identified and quantified being thymol the chemical component present at the highest concentration. Oil-in-water (O/W) emulsions were prepared and the microcapsules were obtained with a spray dryer using maltodextrin as wall material (ratio 1:4)...
August 17, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28820497/anesthetic-agents-of-plant-origin-a-review-of-phytochemicals-with-anesthetic-activity
#20
REVIEW
Hironori Tsuchiya
The majority of currently used anesthetic agents are derived from or associated with natural products, especially plants, as evidenced by cocaine that was isolated from coca (Erythroxylum coca, Erythroxylaceae) and became a prototype of modern local anesthetics and by thymol and eugenol contained in thyme (Thymus vulgaris, Lamiaceae) and clove (Syzygium aromaticum, Myrtaceae), respectively, both of which are structurally and mechanistically similar to intravenous phenolic anesthetics. This paper reviews different classes of phytochemicals with the anesthetic activity and their characteristic molecular structures that could be lead compounds for anesthetics and anesthesia-related drugs...
August 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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