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https://www.readbyqxmd.com/read/28078415/gc-ms-method-validation-and-levels-of-methyl-eugenol-in-a-diverse-range-of-tea-tree-melaleuca-alternifolia-oils
#1
Carolyn A Raymond, Noel W Davies, Tony Larkman
Tea tree oil distilled from Melaleuca alternifolia has widespread use in the cosmetic industry as an antimicrobial as well as for other functions in topical products. Concerns were first raised by the European Commission's Scientific Committee on Consumer Products in 2004 about the level of the potentially carcinogenic phenylpropanoid compound methyl eugenol in tea tree oil. Limits on oil content in different types of cosmetic products were set based on a reported upper level of 0.9% methyl eugenol in the oil...
January 11, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28013459/molecular-and-structural-changes-induced-by-essential-oil-treatments-in-vicia-faba-roots-detected-by-ftir-and-ftnir-spectroscopy
#2
Mauro Mecozzi, Elena Sturchio, Priscilla Boccia, Miriam Zanellato, Claudia Meconi, Francesco Peleggi
Essential oils have recognized antimicrobial and antifungal properties which allow their utilization in agriculture like an alternative to pesticides, but their utilization requires the knowledge of all the potential structural changes and damages produced by the interaction with the vegetal organisms. In this paper, we investigated the effects of two essential oils, the tea tree oil (TTO) and the mixture of clove and rosemary oils (C + R), on the molecular structure of Vicia faba roots by Fourier transform infrared (FTIR) and Fourier near infrared transform (FTNIR) spectroscopy...
December 24, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27979118/encapsulation-of-tea-tree-oil-by-amorphous-beta-cyclodextrin-powder
#3
Meena Shrestha, Thao M Ho, Bhesh R Bhandari
An innovative method to encapsulate tea tree oil (TTO) by direct complexation with solid amorphous beta-cyclodextrin (β-CD) was investigated. A β-CD to TTO ratio of 90.5:9.5 (104.9mg TTO/g β-CD) was used in all complexation methods. The encapsulation was performed by direct mixing, and direct mixing was followed by the addition of water (13-17% moisture content, MC) or absolute ethanol (1:1, 1:2, 1:3 and 1:4 TTO:ethanol). The direct mixing method complexed the lowest amount of TTO (60.77mg TTO/g β-CD). Powder recrystallized using 17% MC included 99...
April 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27876081/in-vitro-activity-of-ten-essential-oils-against-sarcoptes-scabiei
#4
Fang Fang, Kerdalidec Candy, Elise Melloul, Charlotte Bernigaud, Ling Chai, Céline Darmon, Rémy Durand, Françoise Botterel, Olivier Chosidow, Arezki Izri, Weiyi Huang, Jacques Guillot
BACKGROUND: The development of alternative approaches in ectoparasite management is currently required. Essential oils have been demonstrated to exhibit fumigant and topical toxicity to a number of arthropods. The aim of the present study was to assess the potential efficacy of ten essential oils against Sarcoptes scabiei. METHODS: The major chemical components of the oils were identified by GC-MS analysis. Contact and fumigation bioassays were performed on Sarcoptes mites collected from experimentally infected pigs...
November 22, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27790572/antimicrobial-efficacy-of-various-essential-oils-at-varying-concentrations-against-periopathogen-porphyromonas-gingivalis
#5
Veenu Madaan Hans, Harpreet Singh Grover, Himanshu Deswal, Preeti Agarwal
INTRODUCTION: Porphyromonas gingivalis (P.gingivalis) is a notorious perio-pathogen with the ability to evade host defense mechanism and invade into the periodontal tissues. Many antimicrobial agents have been tested that curb its growth, although these agents tend to produce side effects such as antibiotic resistance and opportunistic infections. Therefore search for naturally occurring anti-microbials with lesser side effects is the need of the hour. AIM: The aim of this study was to substantiate the antimicrobial activity of various essential oils; eucalyptus oil, chamomile oil, tea tree oil and turmeric oil against P...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27774425/a-case-series-of-the-effects-of-a-novel-composition-of-a-traditional-natural-preparation-for-the-treatment-of-psoriasis
#6
A Michalsen, O Eddin, A Salama
The objective of this study was to assess the effectiveness of a specific composition of a traditional herbal preparation (DurrDerma) in adult patients with moderate to severe skin psoriasis. The preparation is a newly developed topical combination containing plant-based extracts traditionally used in skin disease as black cumin, olive oil, tea tree oil, cocoa butter completed by vitamin A and vitamin B12. We documented the effectiveness of the preparation in a first case series. A total of 12 patients (8 males and 4 females, 21-86 y) with manifest and treatment-resistant psoriasis were included and treated for 12 weeks...
October 2016: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/27768571/the-effect-of-polyhexanide-octenidine-dihydrochloride-and-tea-tree-oil-as-topical-antiseptic-agents-on-in-vivo-microcirculation-of-the-human-skin-a-noninvasive-quantitative-analysis
#7
Jens Rothenberger, Sabrina Krauss, Christian Tschumi, Afshin Rahmanian-Schwarz, Hans-Eberhard Schaller, Manuel Held
BACKGROUND: Antiseptics are indispensable for wound management and should focus not only on the efficacy in reducing the bacterial burden but also on how much they interfere in wound healing. In this study, the authors analyzed the direct effect of topical antiseptic agents on the microcirculation of intact human skin. METHODS: The perfusion dynamics were assessed before, and 10 minutes after, the volunteers' fingers of the right hand (n = 20) were immersed in the following solutions - octenidine dihydrochloride, polyhexanide, tea tree oil, and saline solution...
October 2016: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/27762176/in-vitro-and-ex-vivo-activity-of-melaleuca-alternifolia-against-protoscoleces-of-echinococcus-ortleppi
#8
Danieli Urach Monteiro, Maria Isabel Azevedo, Carla Weiblen, Sônia DE Avila Botton, Nadine Lysyk Funk, Cristiane DE Bona DA Silva, Régis Adriel Zanette, Thiago Guilherme Schwanz, Mário Luiz DE LA Rue
Cystic echinococcosis is a zoonotic disease of difficult diagnosis and treatment. The use of protoscolicidal agents in procedures is of utmost importance for treatment success. This study was aimed at analysing the in vitro and ex vivo activity of Melaleuca alternifolia oil (tea tree oil - TTO), its nanoemulsion formulation (NE-TTO) and its major component (terpinen-4-ol) against Echinococcus ortleppi protoscoleces obtained from cattle. Concentrations of 2·5, 5 and 10 mg mL-1 of TTO, 10 mg mL-1 of NE-TTO and 1, 1·5 and 2 mg mL-1 of terpinen-4-ol were evaluated in vitro against protoscoleces at 5, 10, 15 and 30 min...
October 20, 2016: Parasitology
https://www.readbyqxmd.com/read/27707640/comparison-of-three-cooling-methods-for-burn-patients-a-randomized-clinical-trial
#9
Young Soon Cho, Young Hwan Choi
Tap water may not be readily available in numerous places as a first aid for burns and, therefore, tea tree oil products are recommended alternatives. Our aim in this study was to compare the cooling effects of three burn-cooling methodologies, running tap water, Burnshield(®), and Burn Cool Spray(®), and suggest indications for each cooling method. This randomized, controlled, study enrolled patients with burns who used the emergency service of Seoul Bestian Hospital from June 2015 to October 2015. The allocation of the cooling methods was randomly generated using a computer...
October 1, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27698173/pseudomonas-aeruginosa-mastitis-in-two-goats-associated-with-an-essential-oil-based-teat-dip
#10
E Jane Kelly, David J Wilson
Pseudomonas aeruginosa is an opportunistic pathogen that has been associated with mastitis in dairy animals, including goats. Often, the environmental sources of the bacteria are water-related (such as hoses and muddy pastures). Mastitis attributable to P. aeruginosa was identified in 2 goats in a small herd. Efforts were made to identify environmental sources of the pathogen. Multiple samples from the goats' environment were cultured, including water from the trough, bedding, the hose used to wash udders, and the teat dip and teat dip containers...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27658606/electron-microscopic-alterations-in-pediculus-humanus-capitis-exposed-to-some-pediculicidal-plant-extracts
#11
Dina M H El Akkad, Naglaa Saad M El-Gebaly, Hebat-Allah Salah A Yousof, Mousa A M Ismail
Head lice, Pediculus humanus capitis, infestation is an important public health problem in Egypt. Inadequate application of topical pediculicides and the increasing resistance to the commonly used pediculicides made the urgent need for the development of new agents able to induce irreversible changes in the exposed lice leading to their mortality. The aim of the present work is to evaluate pediculicidal efficacy of some natural products such as olive oil, tea tree oil, lemon juice, and ivermectin separately in comparison with tetramethrin-piperonyl butoxide (licid), as a standard pediculicide commonly used in Egypt...
August 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/27646626/melaleuca-alternifolia-anthelmintic-activity-in-gerbils-experimentally-infected-by-haemonchus-contortus
#12
Thirssa H Grando, Matheus D Baldissera, Lucas T Gressler, Mariângela Facco de Sá, Bruna N Bortoluzzi, Andressa S Schafer, Rafael C Ebling, Renata P Raffin, Roberto C V Santos, Lenita M Stefani, Rodrigo Vaucher, Marta L R Leal, Silvia G Monteiro
Gastrointestinal parasites are one of the biggest health problems faced in sheep, mainly due to their pathogenicity and resistance to drugs used to control these parasites. Thus, the following study aimed to assess the anthelmintic efficacy of Melaleuca alternifolia against Haemonchus contortus in gerbils (Meriones unguiculatus) experimentally infected. Three treatments were tested: M. alternifolia essential oil, popularly known as tea tree oil (TTO), a solid lipid nanocarrier made with essential oil of Melaleuca (nanoTTO), and terpinen-4-ol (terp-4-ol)...
November 2016: Experimental Parasitology
https://www.readbyqxmd.com/read/27630504/comparative-evaluation-of-co-enzyme-q10-and-melaleuca-alternifolia-as-antioxidant-gels-in-treatment-of-chronic-periodontitis-a-clinical-study
#13
Chetan Purushottam Raut, Kunal S Sethi
BACKGROUND: Conventional nonsurgical periodontal therapy has been proven to be an effective treatment for patients with chronic periodontitis. Coenzyme Q10 and tea tree oil (TTO) are known to have potential therapeutic benefits in chronic periodontitis. AIMS: The aim of the study is to compare the efficacy of Coenzyme Q10 (Perio Q(®)) and tea tree oil (Melaleuca alternifolia) gel as an adjunct to scaling and root planing in the treatment of chronic periodontitis...
July 2016: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/27611576/optimization-of-extraction-conditions-for-maximal-phenolic-flavonoid-and-antioxidant-activity-from-melaleuca-bracteata-leaves-using-the-response-surface-methodology
#14
Wencheng Hou, Wei Zhang, Guode Chen, Yanping Luo
Melaleuca bracteata is a yellow-leaved tree belonging to the Melaleuca genus. Species from this genus are known to be good sources of natural antioxidants, for example, the "tea tree oil" derived from M. alternifolia is used in food processing to extend the shelf life of products. In order to determine whether M. bracteata contains novel natural antioxidants, the components of M. bracteata ethanol extracts were analyzed by gas chromatography-mass spectrometry. Total phenolic and flavonoid contents were extracted and the antioxidant activities of the extracts evaluated...
2016: PloS One
https://www.readbyqxmd.com/read/27591558/inhibition-effect-of-tea-tree-oil-on-listeria-monocytogenes-growth-and-exotoxin-proteins-listeriolysin-o-and-p60-secretion
#15
Z Liu, R Meng, X Zhao, C Shi, X Zhang, Y Zhang, N Guo
: Listeria monocytogenes (L. monocytogenes) is a Gram-positive bacterium that causes infections in humans. In this study, the effects of tea tree oil (TTO) at subinhibitory concentrations on L. monocytogenes growth and two important exotoxin proteins secreted by L. monocytogenes were researched. Treatment with half of minimal inhibitory concentration of TTO demonstrated very little or no reduction in numbers of viable ATCC 19115 cells. Listeriolysin O (LLO) and p60, were investigated...
December 2016: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/27568869/sensitivity-of-candida-albicans-to-essential-oils-are-they-an-alternative-to-antifungal-agents
#16
E Bona, S Cantamessa, M Pavan, G Novello, N Massa, A Rocchetti, G Berta, E Gamalero
AIMS: Candida albicans is an important opportunistic pathogen, responsible for the majority of yeast infections in humans. Essential oils, extracted from aromatic plants, are well-known antimicrobial agents, characterized by a broad spectrum of activities, including antifungal properties. The aim of this work was to assess the sensitivity of 30 different vaginal isolated strains of C. albicans to 12 essential oils, compared to the three main used drugs (clotrimazole, fluconazole and itraconazole)...
December 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27548569/pressure-tuning-of-first-dimension-columns-in-comprehensive-two-dimensional-gas-chromatography
#17
Khan M Sharif, Chadin Kulsing, Philip J Marriott
The experimental approach and mechanism of pressure tuning (PT) are introduced for the first stage of a comprehensive two-dimensional gas chromatography (GC × GC) separation. The PT-GC × GC system incorporates a first dimension ((1)D) coupled column ensemble comprising a pair of (1)D columns ((1)D1 and (1)D2) connected via a microfluidic splitter device, allowing variable decompression of carrier gas across each (1)D column, and a conventional (2)D narrow bore column. By variation of junction pressure between the (1)D1 and (1)D2 columns, tunable total (1)D retentions of analytes are readily derived...
September 20, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/27544535/in-vitro-activity-of-melaleuca-alternifolia-tea-tree-in-its-free-oil-and-nanoemulsion-formulations-against-pythium-insidiosum
#18
Júlia de Souza Silveira Valente, Anelise de Oliveira da Silva Fonseca, Carolina Litchina Brasil, Lauren Sagave, Fernanda Cramer Flores, Cristiane de Bona da Silva, Luís Antônio Sangioni, Luciana Pötter, Janio Morais Santurio, Sônia de Avila Botton, Daniela Isabel Brayer Pereira
Pythium insidiosum is an important aquatic oomycete which can cause pythiosis in both animals and humans. This microorganism shows low susceptibility to antifungal drugs available. This study analyzed the in vitro antimicrobial activity of Melaleuca alternifolia in its free oil (FO) and nanoemulsion (NE) formulations against Brazilian P. insidiosum isolates. The antimicrobial activity evaluation was performed by the broth microdilution method according to CSLI M38-A2 document adapted to phytopharmaceuticals...
December 2016: Mycopathologia
https://www.readbyqxmd.com/read/27513446/what-happens-after-activation-of-ascaridole-reactive-compounds-and-their-implications-for-skin-sensitization
#19
Amar G Chittiboyina, Cristina Avonto, Ikhlas A Khan
To replace animal testing and improve the prediction of skin sensitization, significant attention has been directed to the use of alternative methods. The direct peptide reactivity assay (DPRA), the regulatory agencies' approved alternative in chemico method, has been applied for understanding the sensitization capacity of activated ascaridole. Ascaridole, the oxidative metabolite of α-terpinene, is considered to be one of the components responsible for the contact allergy associated with essential oils derived from Chenopodium and Melaleuca species...
September 19, 2016: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/27427818/essential-oils-part-iv-contact-allergy
#20
Anton C de Groot, Erich Schmidt
Nearly 80 essential oils (including 2 jasmine absolutes) have caused contact allergy. Fifty-five of these have been tested in consecutive patients suspected of contact dermatitis, and nine (laurel, turpentine, orange, tea tree, citronella, ylang-ylang, sandalwood, clove, and costus root) showed greater than 2% positive patch test reactions. Relevance data are generally missing or inadequate. Most reactions are caused by application of pure oils or high-concentration products. The clinical picture depends on the responsible product...
July 2016: Dermatitis
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