Menthone
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Use of Coconut Charcoal and Menthone-Thiosemicarbazone Polymer as Solid Phase Materials for the Determination of N,N-Dimethyltryptamine, Harmine, Harmaline, Harmalol, and Tetrahydroharmine in Ayahuasca Beverage by Liquid Chromatography-Tandem Mass Spectrometry
An extraction method based on solid-phase extraction was developed to determine the major alkaloid components, N,N-dimethyltryptamine, harmine, harmaline, harmalol, and tetrahydroharmine, in ayahuasca using ultra-performance liquid chromatography-tandem mass spectrometry. Coconut charcoal and menthone-thiosemicarbazone polymer were tested as new adsorbent ma
J. Braz. Chem. Soc.. Publicado em: 2019-01
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2. Larvicidal effect of Clinopodium macrostemum essential oil extracted by microwave-assisted hydrodistillation against Culex quinquefasciatus (Diptera: Culicidae)
Abstract INTRODUCTION: In the present study, we determined the chemical composition of Clinopodium macrostemum essential oil obtained by microwave-assisted hydrodistillation and its effect on the growth and development of Culex quinquefasciatus mosquito larvae. METHODS: The essential oil compounds were identified by gas chromatography-mass spectrometry an
Rev. Soc. Bras. Med. Trop.. Publicado em: 2018-06
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3. Bactericidal antibiotic-phytochemical combinations against methicillin resistant Staphylococcus aureus
Methicillin resistant Staphylococcus aureus (MRSA) infection is a global concern nowadays. Due to its multi-drug resistant nature, treatment with conventional antibiotics does not assure desired clinical outcomes. Therefore, there is a need to find new compounds and/or alternative methods to get arsenal against the pathogen. Combination therapies using conve
Braz. J. Microbiol.. Publicado em: 2012-09
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4. Adubação orgânica níveis de sombreamento e tipos de malhas sobre o crescimento e a produção de óleo essencial de hortelã-pimenta / Organic fertilization, shading levels and types of meshes on growth and essential oil of peppermint
Luz e adubação são componentes vitais para o crescimento e desenvolvimento das plantas. Tanto a qualidade como a quantidade da radiação incidente e a adubação orgânica podem afetar o crescimento vegetativo e a biossíntese e acúmulo de metabólitos secundários em plantas medicinais e aromáticas. Objetivou-se neste trabalho avaliar o crescimento ve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2011
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5. Synthesis of liquid menthol by hydrogenation of dementholized peppermint oil over Ni catalysts
Hydrogenation of (-)-menthone and (+)-isomenthone was studied at 2.7 MPa and 100 ºC. The objective was to produce a liquid menthol mixture rich in (-)-menthol from dementholized peppermint oil. Ni-based catalysts were tested and compared for this reaction: a) 6 and 12% Ni dispersed into a nonstoichiometric magnesium aluminate (Ni-Mg-Al) with spinel structur
Química Nova. Publicado em: 2010
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6. New liquid crystalline tolanes from (-)-menthone
Publicado em: 2007
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7. Composição e atividade antifúngica do óleo essencial de hortelã-pimenta (Mentha piperita L.) / Composition and antifungal activity of pepper mint (Mentha piperita L.) essential oil
Pepper mint (Mentha piperita L.) essential oil (EO), obtained by hydro distillation of dry leaves, was evaluated in vitro through a poison food assay (0.1; 0.2 and 0.3%) presented antifungal activity against Aspergillus flavus, A. ochraceous, A. niger, A. glaucus, Fusarium oxysporum, F. semitectum, Colletotrichum musae and C. gloeosporioides. The EO was frac
Publicado em: 2006
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8. New liquid crystalline tolanes from (-)-menthone
Synthetic manipulations were carried out with the aim of obtaining an advanced linear fragment for production of thermotropic liquid crystals. The chiral fragment synthesised was introduced in a tolanbenzoate mesogenic core by coupling of Sonogashira. The final chiral tolans showed smectic A and C and nematic liquid crystalline phases. The crystallographic s
Brazilian Journal of Physics. Publicado em: 2002-06
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9. Monoterpene Metabolism. Cloning, Expression, and Characterization of Menthone Reductases from Peppermint1
(−)-Menthone is the predominant monoterpene produced in the essential oil of maturing peppermint (Mentha x piperita) leaves during the filling of epidermal oil glands. This early biosynthetic process is followed by a second, later oil maturation program (approximately coincident with flower initiation) in which the C3-carbonyl of menthone is reduced to yie
American Society of Plant Biologists.
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10. Metabolism of Monoterpenes: Conversion of l-Menthone to l-Menthol and d-Neomenthol by Stereospecific Dehydrogenases from Peppermint (Mentha piperita) Leaves 12
The monoterpene ketone l-menthone is specifically converted to l-menthol and l-menthyl acetate and to d-neomenthol and d-neomenthyl-β-d-glucoside in mature peppermint (Mentha piperita L. cv. Black Mitcham) leaves. The selectivity of product formation results from compartmentation of the menthol dehydrogenase with the acetyl transferase and that of the neome
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11. Metabolism of Monoterpenes: Demonstration of (+)-Neomenthyl-β-d-Glucoside as a Major Metabolite of (−)-Menthone in Peppermint (Mentha Piperita)1
(−)-Menthone, the major monoterpene component of the essential oil of maturing peppermint (Mentha piperita L.) leaves (6 micromoles per leaf) is rapidly metabolized at the onset of flowering with a concomitant rise in the level of (−)-menthol (to about 2 micromoles per leaf). Exogenous (−)-[G-3H]menthone is converted into (−)-[3H]menthol as the major
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12. Demonstration of the Intercellular Compartmentation of l-Menthone Metabolism in Peppermint (Mentha piperita) Leaves 1
The metabolism of l-menthone, which is synthesized in the epidermal oil glands of peppermint (Mentha piperita L. cv. Black Mitcham) leaves, is compartmented; on leaf maturity, this ketone is converted to l-menthol and l-menthyl acetate in one compartment, and to d-neomenthol and d-neomenthyl glucoside in a separate compartment. All of the enzymes involved in