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Thujone

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https://www.readbyqxmd.com/read/29198575/voltammetric-determination-of-thujone-in-herbal-matrices-in-the-presence-of-triton-x-100
#1
Mateusz Kowalcze, Małgorzata Jakubowska
A simple, sensitive and rapid method of low concentration of thujone determination using Controlled Growth Mercury Drop Electrode and Differential Pulse Voltammetry was described. The reduction of thujone in phosphoric acid or potassium nitrate, involves a quasi-reversible and adsorption-controlled two-electron process. In voltammetric experiments the addition of ethanol and Triton X-100 is recommended. Experimental conditions such as composition of supporting electrolyte, concentration of Triton X-100 and operation parameters were established...
November 30, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29175772/antibacterial-anticandidal-and-antioxidant-properties-of-tanacetum-argenteum-lam-willd-subsp-flabellifolium-boiss-heldr-grierson
#2
Yavuz Bulent Kose, Gokalp Iscan, Fatih Goger, Betul Demirci, Ceren Elmacı
In the present study hydrodistilled essential oil and total methanol extracts of Tanacetum argenteum subsp. flabellifolium have been evaluated for their antimicrobial and antioxidant effects. The chemical composition of the oil and the crude extract were determined by GC/FID, GC/MS and LC/DAD/ESI-MS systems respectively. β-thujone (47.1%), α-pinene (19.1%) and α-thujone (10.5%) were the main compounds of the essential oil while the 5-Ocaffeoylquinic acid, 1,5-O-dicaffeoylquinic acid, 4,5-O-dicaffeoylquinic acid were identified as flavonoid content of the crude extract...
November 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29164813/chemical-polymorphism-of-essential-oils-of-artemisia-vulgaris-growing-wild-in-lithuania
#3
Asta Judzentiene, Jurga Budiene
Compositional variability of mugwort (Artemisia vulgaris L.) essential oils has been investigated in the study. Plant material (over ground parts at full flowering stage) was collected from forty-four wild populations in Lithuania. The oils from aerial parts were obtained by hydrodistillation and analyzed by GC(FID) and GC/MS. In total, up to 111 components were determined in the oils. As the major constituents were found: sabinene, 1,8-cineole, artemisia ketone, both thujone isomers, camphor, cis-chrysanthenyl acetate, davanone and davanone B...
November 21, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29143149/effects-of-intraspecific-and-intra-individual-differences-in-plant-quality-on-preference-and-performance-of-monophagous-aphid-species
#4
Ruth Jakobs, Caroline Müller
Plant chemistry is one of the main drivers of herbivore distribution. Monophagous herbivore species are highly specialized, but even within their only host species the chemistry varies. The herbivore's choice is initially mainly guided by volatile plant compounds. Once on the plant, particularly for aphids the phloem quality affects their performance. However, little is known about the intraspecific and intra-individual variation in phloem sap and their influences on monophagous aphids. To determine potential mechanisms involved in aphid colonization, we tested the effects of intraspecific chemical variation in Tanacetum vulgare, which produces different chemotypes, on the preference of two monophagous aphid species...
November 15, 2017: Oecologia
https://www.readbyqxmd.com/read/29111190/chemical-composition-antioxidant-and-antibacterial-activities-of-essential-oil-and-methanol-extract-of-artemisia-vulgaris-and-gaultheria-fragrantissima-collected-from-nepal
#5
Bishnu Prasad Pandey, Rupak Thapa, Anil Upreti
OBJECTIVE: To identify the chemical constituents and biological activities of essential oil and crude methanol extract of Artemisia vulgaris (A. vulgaris) and Gaultheria fragrantissima (G. fragrantissima). METHODS: Phytochemical screening, total phenolic and flavonoid content, antibacterial activities, anti-oxidant assay of the crude extract were carried out to identify the biological activities and phytonutrients present in the extract. Furthermore, the chemical constituents present in the essential oil and crude methanol extract were analyzed using gas chromatography mass spectroscopy and high performance liquid chromatography (HPLC) analysis...
October 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/29078017/exploring-the-substrate-scope-of-baeyer-villiger-monooxygenases-with-branched-lactones-as-entry-towards-polyesters
#6
Marie A F Delgove, Maximilian J L F Fürst, Marco W Fraaije, Katrien V Bernaerts, Stefaan M A De Wildeman
Baeyer-Villiger monooxygenases (BVMOs) are biocatalysts able to convert cyclic ketones to lactones by the insertion of oxygen. The aim of this study was to explore the substrate scope of several BVMOs with (biobased) cyclic ketones as precursors for the synthesis of branched polyesters.The product structure and the degree of conversion of several biotransformations was determined after conversions using self-sufficient BVMOs. Full regioselectivity towards the normal lactone of jasmatone and menthone was observed, while the oxidation of other substrates such as α,β-thujone and 3,3,5-trimethylcyclohexanone resulted in mixtures of regio-isomers...
October 27, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/28930281/the-genus-artemisia-a-2012-2017-literature-review-on-chemical-composition-antimicrobial-insecticidal-and-antioxidant-activities-of-essential-oils
#7
REVIEW
Abhay K Pandey, Pooja Singh
Essential oils of aromatic and medicinal plants generally have a diverse range of activities because they possess several active constituents that work through several modes of action. The genus Artemisia includes the largest genus of family Asteraceae has several medicinal uses in human and plant diseases aliments. Extensive investigations on essential oil composition, antimicrobial, insecticidal and antioxidant studies have been conducted for various species of this genus. In this review, we have compiled data of recent literature (2012-2017) on essential oil composition, antimicrobial, insecticidal and antioxidant activities of different species of the genus Artemisia...
September 12, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930262/the-chemotaxonomy-of-common-sage-salvia-officinalis-based-on-the-volatile-constituents
#8
Jonathan D Craft, Prabodh Satyal, William N Setzer
Background: Common sage (Salvia officinalis) is a popular culinary and medicinal herb. A literature survey has revealed that sage oils can vary widely in their chemical compositions. The purpose of this study was to examine sage essential oil from different sources/origins and to define the possible chemotypes of sage oil. Methods: Three different samples of sage leaf essential oil have been obtained and analyzed by GC-MS and GC-FID. A hierarchical cluster analysis was carried out on 185 sage oil compositions reported in the literature as well as the three samples in this study...
June 29, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28918484/drug-herb-interactions-in-the-elderly-patient-with-ibd-a-growing-concern
#9
REVIEW
Haider Rahman, Marina Kim, Galen Leung, Jesse A Green, Seymour Katz
Inflammatory bowel disease (IBD), which includes conditions such as Crohn's disease and ulcerative colitis, is becoming more prevalent with the elderly being the fastest growing group. Parallel to this, there is an increasing interest in the use of complementary and alternative medicine (CAM). Nearly half of patients with IBD have used CAM at one time. The elderly patients, however, are burdened by comorbid conditions, polypharmacy, and altered functional status. With increasing use of complementary and alternative medicine in our elderly patients with IBD, it is vital for the provider to provide counsel on drug-herb potential interactions...
December 2017: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/28588629/in-vitro-and-in-vivo-activity-of-artemisia-sieberi-against-trichomonas-gallinae
#10
M R Youssefi, M Abouhosseini Tabari, A A Moghadamnia
In Iranian folk medicine Artemisia sieberi has been used for treatment of parasite infections in human and animals. The present study was designed to evaluate the in vitro and in vivo effects of A. sieberi essential oil (EO) against Trichomonas gallinae. Trichomonas gallinae were recovered by wet mount method from infected native pigeons. The in vitro assays were accomplished in multi-well plates containing metronidazole (MTZ) as a standard antitrichomonal and EO in final concentrations of 2.5, 5, 10, 20, 50, and 100 μg/ml of culture medium containing 10(4) parasites...
2017: Iranian Journal of Veterinary Research
https://www.readbyqxmd.com/read/28507464/chemical-composition-and-biological-activities-of-salvia-officinalis-essential-oil-from-tunisia
#11
Med Raâfet Ben Khedher, Saoussen Ben Khedher, Ikbal Chaieb, Slim Tounsi, Mohamed Hammami
The aim of this study is to evaluate the chemical composition, antioxidant, antimicrobial, insecticidal and allelopathic activities of Tunisia Salvia officinalis essential oil (SoEO). The SoEO was characterized by the presence of 49 components with camphor (25.14 %), α-thujone (18.83 %), 1,8-cineole (14.14 %), viridiflorol (7.98 %), β-thujone (4.46 %) and β-caryophyllene (3.30 %) as the major components, determined by gas chromatography-mass spectrometry. The level of antioxidant activity, determined by complementary tests, namely 2,2-diphenyl-1-picrylhydrazyl radical-scavenging (IC50= 6...
2017: EXCLI Journal
https://www.readbyqxmd.com/read/28488391/essential-oil-variability-in-natural-populations-of-artemisia-campestris-l-and-artemisia-herba-alba-asso-and-incidence-on-antiacetylcholinesterase-and-antioxidant-activities
#12
Faten Younsi, Sameh Mehdi, Oumayma Aissi, Najoua Rahali, Rym Jaouadi, Mohamed Boussaid, Chokri Messaoud
The intraspecific variability of Artemisia herba-alba and A. campestris essential oils and the evaluation of their antioxidant and antiacetylcholinesterase activities were determined. Artemisia herba-alba essential oil was found rich in camphor (19.61%), α-thujone (19.40%), β-thujone (9.44%), chrysanthenone (9.26%), and trans-sabinyl acetate (8.43%). The major compounds of A. campestris essential oil were germacrene D (16.38%), β-pinene (16.33%), and limonene (9.17%). Significant variation in the essential oil composition was observed among populations of each species...
July 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28477412/salvia-officinalis-l-essential-oils-from-spain-determination-of-composition-antioxidant-capacity-antienzymatic-and-antimicrobial-bioactivities
#13
Ana-Belen Cutillas, Alejandro Carrasco, Ramiro Martinez-Gutierrez, Virginia Tomas, Jose Tudela
Four essential oils (EOs) from Salvia officinalis L. cultivated in Spain (Murcia Province) were analyzed by gas chromatography coupled with mass spectrometry (GC/MS) to determine their relative and absolute compositions. The main components were α-thujone (22.8 - 41.7%), camphor (10.7 - 19.8%), 1,8-cineole (4.7 - 15.6%), and β-thujone (6.1 - 15.6%). Enantioselective gas chromatography identified (-)-α-thujone and (+)-camphor as the main enantiomers in all the analyzed EOs. Furthermore, when the EOs were tested to determine their antioxidant activity against free radicals and as ferric reducing and ferrous chelating agents, all were seen to have moderate activity due to the compounds they contained, such as linalool or terpinene...
August 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28472675/toxic-essential-oils-part-v-behaviour-modulating-and-toxic-properties-of-thujones-and-thujone-containing-essential-oils-of-salvia-officinalis-l-artemisia-absinthium-l-thuja-occidentalis-l-and-tanacetum-vulgare-l
#14
Niko S Radulović, Marija S Genčić, Nikola M Stojanović, Pavle J Randjelović, Zorica Z Stojanović-Radić, Nenad I Stojiljković
Neurotoxic thujones (α- and β-diastereoisomers) are common constituents of plant essential oils. In this study, we employed a statistical approach to determine the contribution of thujones to the overall observed behaviour-modulating and toxic effects of essential oils (Salvia officinalis L., Artemisia absinthium L., Thuja occidentalis L. and Tanacetum vulgare L.) containing these monoterpene ketones. The data from three in vivo neuropharmacological tests on rats (open field, light-dark, and diazepam-induced sleep), and toxicity assays (brine shrimp, and antimicrobial activity against a panel of microorganisms), together with the data from detailed chemical analyses, were subjected to a multivariate statistical treatment to reveal the possible correlation(s) between the content of essential-oil constituents and the observed effects...
July 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28395994/thujone-inhibits-the-function-of-%C3%AE-7-nicotinic-acetylcholine-receptors-and-impairs-nicotine-induced-memory-enhancement-in-one-trial-passive-avoidance-paradigm
#15
Ahmed Sultan, Keun-Hang Susan Yang, Dmitro Isaev, Eslam El Nebrisi, Nurulain Syed, Nadia Khan, Christopher F Howarth, Bassem Sadek, Murat Oz
Effects of thujone, a major ingredient of absinthe, wormwood oil and some herbal medicines, were tested on the function of α7 subunit of the human nicotinic acetylcholine (α7 nACh) receptor expressed in Xenopus oocytes using the two-electrode voltage-clamp technique. Thujone reversibly inhibited ACh (100μM)-induced currents with an IC50 value of 24.7μM. The effect of thujone was not dependent on the membrane potential and did not involve Ca(2+)-dependent Cl(-) channels expressed endogenously in oocytes...
June 1, 2017: Toxicology
https://www.readbyqxmd.com/read/28381767/volatile-components-of-the-essential-oil-of-artemisia-montana-and-their-sedative-effects
#16
Kento Kunihiro, Takao Myoda, Noriaki Tajima, Kotaro Gotoh, Tai Kaneshima, Takao Someya, Kazuki Toeda, Takane Fujimori, Makoto Nishizawa
The sedative effects of volatile components in the essential oil of Artemisia montana ("Yomogi") were investigated and measured using gas chromatography-mass spectrometry (GC-MS). Major components identified included 1,8-cineol, camphor, borneol, α-piperitone, and caryophyllene oxide. Among them, 1,8-cineol exhibited the highest flavor dilution (FD) value in an aroma extract dilution analysis (AEDA), followed by borneol, o-cymene, β-thujone, and bornyl acetate. The sedative effects of yomogi oil aroma were evaluated by sensory testing, analysis of salivary α-amylase activity, and measurement of relative fluctuation of oxygenated hemoglobin concentration in the brain using near-infrared spectroscopy (NIRS)...
August 1, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28378196/eco-friendly-control-of-the-poultry-red-mite-dermanyssus-gallinae-dermanyssidae-using-the-%C3%AE-thujone-rich-essential-oil-of-artemisia-sieberi-asteraceae-toxic-and-repellent-potential
#17
Mohaddeseh Abouhosseini Tabari, Mohammad Reza Youssefi, Giovanni Benelli
The poultry red mite, Dermanyssus gallinae, represents a key threat for the poultry industry worldwide. The control of D. gallinae is mainly achieved by continuous applications of acaricides. However, the fast-growing development of resistance, and the strict laws concerning chemicals admitted for treatments on food animals, highlighted the importance of alternative control tools. Here, we explored the potential of Artemisia sieberi essential oil against D. gallinae. In this study, the A. sieberi essential oil was analyzed using GC and GC-MS...
May 2017: Parasitology Research
https://www.readbyqxmd.com/read/28346993/artemisia-sieberi-besser-essential-oil-and-treatment-of-fungal-infections
#18
REVIEW
Mohaddese Mahboubi
A. sieberi essential oil has been used for treatment of hardly curable infectious ulcers in Middle East Medicine and has been famous due to its wormicide effects. In this review, we evaluated the potency of A. sieberi essential oil in treatment of fungal infections. We searched in PubMed Central, Science direct, Wiley, Springer, SID, and accessible books, reports, thesis. There is a lot of mixed information on chemical compositions of A. sieberi essential oil, but most articles reported α, β-thujones as the main components of essential oils...
May 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28314999/genetic-diversity-and-metabolic-profile-of-salvia-officinalis-populations-implications-for-advanced-breeding-strategies
#19
Eirini Sarrou, Ioannis Ganopoulos, Aliki Xanthopoulou, Domenico Masuero, Stefan Martens, Panagiotis Madesis, Athanasios Mavromatis, Paschalina Chatzopoulou
As a result of this work, we were able to characterize seven indigenous to Greece Salvia officinalis populations using genetic and metabolomic tools. These tools can be used to select the most promising genotypes, capable to design future breeding programs for high valuable varieties. An initial investigation was carried out to compare the genetic and metabolic diversity in S. officinalis grown in Greece and to discern the relationship between the two sets of data. Analysis of inter-simple sequence repeats (ISSR) revealed significant genetic differences among seven sage populations, which were grouped into three main clusters according to an UPGMA ISSR data-based dendrogram and Principle Coordinate Analysis...
August 2017: Planta
https://www.readbyqxmd.com/read/28276694/artemisia-umbelliformis-lam-and-g%C3%A3-n%C3%A3-pi-liqueur-volatile-profile-as-diagnostic-marker-for-geographic-origin-and-to-predict-liqueur-safety
#20
Lorenzo Boggia, Giuseppe Pignata, Barbara Sgorbini, Maria Laura Colombo, Arianna Marengo, Manuela Casale, Silvana Nicola, Carlo Bicchi, Patrizia Rubiolo
Artemisia umbelliformis, commonly known as "white génépi", is characterized by a volatile fraction rich in α- and β-thujones, two monoterpenoids; under European Union (EU) regulations these are limited to 35 mg/L in Artemisia-based beverages because of their recognized activity on the human central nervous system. This study reports the results of an investigation to define the geographical origin and thujone content of individual plants of A. umbelliformis from different geographical sites, cultivated experimentally at a single site, and to predict the thujone content in the resulting liqueurs through their volatile fraction...
April 5, 2017: Journal of Agricultural and Food Chemistry
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