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Campana Raffaella, Luca Casettari, Laura Fagioli, Marco Cespi, Giulia Bonacucina, Wally Baffone
Food safety is a fundamental concern for both consumers and the food industry, especially as the numbers of reported cases of food-associated infections continue to increase. Industrial surfaces can provide a suitable substrate for the development and persistence of bacterial organized in biofilms that represent a potential source of food contamination. The negative consumer perception of chemical disinfectants has shifted the attention to natural substances, such as plant extracts. The aim of this study was to investigate the possibility of using the essential oils (EOs) in the fight against S...
October 17, 2016: International Journal of Food Microbiology
Alexandra Kodadová, Zuzana Vitková, Jarmila Oremusová, Petra Herdová, Anton Ťažký, Peter Mikuš
This work was aimed at a progressive formulation of drugs into chitosan hydrogels. It was taken into consideration that a therapeutic effect of the drugs could be enhanced by a combination of natural compounds with chemical (synthetic) drugs. In this work, sage essential oil (SEO) bicyclic monoterpenes with antiflogistic, antiseptic, and antimycotic properties were combined with terbinafine (TB) having a strong antimycotic activity. Detail optimization of the hydrogel-drugs composition (SEO monoterpenes, TB, chitosan, and polysorbate 80 concentrations), based on permeation experiment and UV absorption/GC-MS analysis of permeated species (eucalyptol, camphor, borneol, thujone, TB) in dialysates, was made...
October 22, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Irene Thamm, Johannes Richers, Michael Rychlik, Konrad Tiefenbacher
The short synthesis of α-thujone relies on the functionalization of the readily available dimethylfulvene. Furthermore, the three main metabolites of the natural product were also synthesized. Since d6-acetone can be used as a starting material, the route developed allows for the facile incorporation of isotopic labels which are required for detecting and quantifying trace amounts via GC/MS analysis.
September 22, 2016: Chemical Communications: Chem Comm
Richard Karban, Patrick Grof-Tisza, James D Blande
Plants that are damaged by herbivores emit complex blends of volatile compounds that often cause neighboring branches to induce resistance. Experimentally clipped sagebrush foliage emits volatiles that neighboring individuals recognize and respond to. These volatiles vary among individuals within a population. Two distinct types are most common with either thujone or camphor as the predominate compound, along with other less common types. Individuals respond more effectively to cues from the same type, suggesting that some of the informative message is contained in the compounds that differentiate the types...
August 2016: Journal of Chemical Ecology
Benoit Bach, Marilyn Cleroux, Mayra Saillen, Patrik Schönenberger, Stephane Burgos, Julien Ducruet, Armelle Vallat
The concentrations of α/β-thujone and the bitter components of Artemisia absinthium were quantified from alcoholic wormwood extracts during four phenological stages of their harvest period. A solid-phase micro-extraction method coupled to gas chromatography-mass spectrometry was used to determine the concentration of the two isomeric forms of thujone. In parallel, the combination of ultra-high pressure liquid chromatography and high resolution mass spectrometry allowed to quantify the compounds absinthin, artemisetin and dihydro-epi-deoxyarteannuin B...
December 15, 2016: Food Chemistry
Mohammed El-Amin Said, Marcello Militello, Sergio Saia, Luca Settanni, Aurora Aleo, Caterina Mammina, Isabelle Bombarda, Pierre Vanloot, Christian Roussel, Nathalie Dupuy
Aerial parts of Artemisia arborescens were collected from different sites of the Mediterranean area (southwestern Algeria and southern Italy) and the chemical composition of their essential oil (EO) extracted by hydrodistillation was studied by both gas chromatography (GC) equipped with an enantioselective capillary column and GC/mass spectrometry (GC/MS). The EOs obtained were tested against several Listeria monocytogenes strains. Using GC and GC/MS, 41 compounds were identified, accounting for 96.0 - 98...
August 2016: Chemistry & Biodiversity
Francesca Santomauro, Rosa Donato, Cristiana Sacco, Gabriella Pini, Guido Flamini, Anna Rita Bilia
Candida spp. are often the cause of infection in immune-compromised individuals. They are characterized by a strong resistance to antimicrobial drugs and disinfectants. The activity of Artemisia annua essential oil against Candida spp. was determined by vapour contact and microdilution assay. The oil was characterized by the presence of oxygenated monoterpenes (more than 75 % of the constituents), mainly represented by the irregular monoterpene artemisia ketone (ca. 22 %), and the widespread monoterpenes 1,8 cineole (ca...
July 2016: Planta Medica
Jack D Williams, Jessica A Yazarians, Chelcie C Almeyda, Kristin A Anderson, Gregory R Boyce
The discovery of the (+)-α-thujone and (-)-β-thujone stereoisomers in the essential oil of sage (Salvia officinalis L.) and dietary supplements is documented for the first time. The detection was accomplished using a chiral resolution protocol of racemic α-/β-thujone on headspace solid-phase microextraction-gas chromatography-mass spectrometry. Because the previously unreported stereoisomers, (+)-α-thujone and (-)-β-thujone, are not commercially available, a three-step synthesis of racemic thujone from commercially available starting materials was developed...
June 1, 2016: Journal of Agricultural and Food Chemistry
María Elisa Mariani, Mariela E Sánchez-Borzone, Daniel A García
The cyclic ketones, thujone and dihydrocarvone, are lipophilic components of essential oils extracted from different plants, which have proven insecticidal activity. The GABAA receptor is activated by the neurotransmitter GABA and is the action site of widely used neurotoxic pesticides. Many compounds that regulate GABAA receptor function interact with membrane lipids, causing changes in their physical properties and consequently, in the membrane dynamic characteristics that modulate receptor macromolecules...
June 2016: Chemistry and Physics of Lipids
Angelo Torres, Yosselyn Vargas, Daniel Uribe, Cristian Carrasco, Cristian Torres, René Rocha, Carlos Oyarzún, Rody San Martín, Claudia Quezada
The most aggressive type of brain tumor is glioblastoma multiforme, which to date remains incurable. Thuja occidentalis is used in homeopathy for the treatment of cancer, however, its mechanism of action remains unknown. We set out to study the effects of thujone fractions of Thuja on glioblastoma using in vitro and in vivo models. We found that the α/ β-thujone fraction decrease the cell viability and exhibit a potent anti-proliferative, pro-apoptotic and anti-angiogenic effects in vitro. In vivo assays showed that α /β-thujone promotes the regression of neoplasia and inhibits the angiogenic markers VEGF, Ang-4 and CD31 into the tumor...
May 2016: Journal of Neuro-oncology
Michal P Dybowski, Andrzej L Dawidowicz
Absinthe is a strong spirit beverage, mostly green in color, containing besides ethyl alcohol (main component), alcoholic macerate of wormwood and other plants such as star anise and fennel seed. Due to the potential risks associated with the presence of α- and β-thujone many countries have implemented strict rules limiting the content of these congeners in alcohol products. The presented paper describes a simple and sensitive method for the determination of α- and β-thujone in human serum using Solid Phase Extraction as a sample preparation method combined with GC/MS analysis...
February 2016: Forensic Science International
Mohammed El-Amin Said, Pierre Vanloot, Isabelle Bombarda, Jean-Valère Naubron, El Montassir Dahmane, Ahmed Aamouche, Marion Jean, Nicolas Vanthuyne, Nathalie Dupuy, Christian Roussel
An unprecedented methodology was developed to simultaneously assign the relative percentages of the major chiral compounds and their prevailing enantiomeric form in crude essential oils (EOs). In a first step the infrared (IR) and vibrational circular dichroism (VCD) spectra of the crude essential oils were recorded and in a second step they were modelized as a linear weighted combination of the IR and VCD spectra of the individual spectra of pure enantiomer of the major chiral compounds present in the EOs...
January 15, 2016: Analytica Chimica Acta
Yu Zhou, Jun-quan Liu, Zhong-hai Zhou, Xiao-ting Lv, Yong-qiang Chen, Lei-qing Sun, Fu-xing Chen
Thujone is a monoterpene ketone natural substance found mainly in wormwood and sage. Previous studies have shown that Thujone has various pharmacological effects, such as anti-tumor, analgesic, and insecticide. The effect of α-Thujone to human immune cells is still unknown. Our study focuses on investigating the effects and mechanism of α-Thujone to CD3AK (anti- CD3 antibody induced activated killer) cells proliferation and cytotoxicity to colon cancer cell lines. With cell proliferation and FCM assay, it is found that α-Thujone could significantly enhance CD3AK cell proliferation and expression of CD107a in a dose-dependent manner...
January 2016: International Immunopharmacology
Biljana Nikolić, Bojana Vasilijević, Dragana Mitić-Ćulafić, Branka Vuković-Gačić, Jelena Knežević-Vukćević
Genotoxic/antigenotoxic, mutagenic/antimutagenic and cytotoxic effects of monoterpenes camphor, eucalyptol and thujone were determined in bacteria and mammalian cells using alkaline comet assay, Escherichia coli K12 reversion test and MTT assay, respectively. When applied in low doses (up to 200 μM in bacterial assay and 50 μM in comet assay) monoterpenes protected repair proficient E. coli and Vero cells against UV-induced mutagenesis and 4NQO-induced DNA strand breaks, respectively. Antimutagenic response was not detected in nucleotide excision repair (NER) deficient bacteria...
December 5, 2015: Chemico-biological Interactions
Rosaria Costa, Salvatore Ragusa, Marina Russo, Giovanna Certo, Flavio A Franchina, Antonio Zanotto, Elisa Grasso, Luigi Mondello, Maria Paola Germanò
Artemisia arborescens, also known as tree wormwood, is a typical species of the Mediterranean flora. It has been used in folk medicine for its antispasmodic, anti-pyretic, anti-inflammatory, and abortifacient properties. In the current study, the application of multidimensional comprehensive gas chromatography (GC×GC), allowed to obtain a detailed fingerprint of the essential oil from A. arborescens aerial parts, highlighting an abundant presence of chamazulene followed by camphor, β-thujone, myrcene, and α-pinene...
January 5, 2016: Journal of Pharmaceutical and Biomedical Analysis
Alessandra Manzo, Loana Musso, Sara Panseri, Marcello Iriti, Sabrina Dallavalle, Enrico Catalano, Giorgio Scarì, Annamaria Giorgi
BACKGROUND: This research aimed at improving knowledge as to the chemical composition and the antibacterial and anti-cancer activities of the essential oil of Waldheimia glabra, a wild plant from the Himalayan Mountains. RESULTS: The results obtained by GC-MS showed that spathulenol, 9-tetradecenol, thujopsene, α-thujone, santolina alcohol and terpinen-4-ol were the main constituents of Waldheimia glabra essential oil. These results were confirmed by HS-SPME GC-MS analysis that also reported high amounts of artemisia alcohol and camphor...
July 2016: Journal of the Science of Food and Agriculture
Juan José García-Rodríguez, María-Fé Andrés, Alexandra Ibañez-Escribano, Luis F Julio, Jesús Burillo, Francisco Bolás-Fernández, Azucena González-Coloma
Essential oils (EOs) obtained from two crops and populations of thujone-free cultivated Artemisia absinthium were tested against two nematode models, the mammalian parasite Trichinella spiralis, and the plant parasitic root knot nematode Meloidogyne javanica. The EOs were characterized by the presence of (Z)-epoxyocimene and chrysanthenol as major components and showed time and population dependent quantitative and qualitative variations in composition. The EOs showed a strong ex vivo activity against the L1 larvae of the nematode Trichinella spiralis with a reduction of infectivity between 72 and 100% at a dose range of 0...
September 1, 2015: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
Diego A Sampietro, Emilio F Lizarraga, Zharkyn A Ibatayev, Akerke B Omarova, Yerlan M Suleimen, Cesar A N Catalán
Essential oils from aerial parts of Acantholippia deserticola, Artemisia proceriformis, Achillea micrantha and Libanotis buchtormensis were analysed by GC-MS. The major compounds identified were β-thujone (66.5 ± 0.2%), and trans-sabinyl acetate (12.1 ± 0.2%) in A. deserticola; α-thujone (66.9 ± 0.4%) in A. proceriformis; 1,8-cineole (26.9 ± 0.5%), and camphor (17.7 ± 0.3%) in A. micrantha and cis-β-ocimene (23.3 ± 0.3%), and trans-β-ocimene (18.4 ± 0.2%) in L. buchtormensis. The oils showed a weak antimicrobial effect (MIC100 > 1...
September 2016: Natural Product Research
Taieb Tounekti, Habib Khemira
AIM: The purpose of this study was to evaluate how increasing NaCl salinity in the medium can affects the essential oils (EOs) composition and phenolic diterpene content and yield in leaves of Salvia officinalis L. The protective role of such compounds against NaCl stress was also argued with regard to some physiological characteristics of the plant (water and ionic relations as well as the leaf gas exchanges). MATERIALS AND METHODS: Potted plants were exposed to increasing NaCl concentrations (0, 50, 75, and 100 mM) for 4 weeks during July 2012...
July 2015: Journal of Intercultural Ethnopharmacology
Gennadi Gudi, Andrea Krähmer, Hans Krüger, Hartwig Schulz
Sage (Salvia officinalis L.) is cultivated worldwide for its aromatic leaves, which are used as herbal spice, and for phytopharmaceutical applications. Fast analytical strategies for essential oil analysis, performed directly on plant material, would reduce the delay between sampling and analytical results. This would enhance product quality by improving technical control of cultivation. The attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) method described here provides a reliable calibration model for quantification of essential oil components [EOCs; R(2) = 0...
October 7, 2015: Journal of Agricultural and Food Chemistry
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