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Dissertations / Theses on the topic 'Essential (volatile) oil'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Van, Vuuren SF, and A. M. Viljoen. "Interaction between the non-volatile and volatile fractions on the antimicrobial activity of Tarchonanthus camphoratus." Elsevier, 2009. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001729.

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Abstract The contribution of the volatile constituents to the overall antimicrobial efficacy of the medicinal plant Tarchonanthus camphoratus was considered, where different extraction techniques were applied to yield four fractions. These comprised of the essential oil prepared by hydrodistillation, non-volatile constituents prepared by extraction of plant material remaining in the distilling apparatus (having no or negligible volatile constituents), and extracts prepared from fresh and dried plant material having both volatile and non-volatile constituents. The antimicrobial activities of th

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2

Slaughter, Leeann L. "Antilisterial Characteristics of Volatile Essential Oils." UKnowledge, 2013. http://uknowledge.uky.edu/animalsci_etds/16.

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This study explored the in vitro and in situ antilisterial inhibitory activity of 16 essential oils during indirect exposure: Spanish Basil oil (Ocimum basilicum), Bay oil (Pimenta racemosa), Italian Bergamot oil (Citrus bergamia), Roman Chamomile oil (Anthemis nobilis), Sir Lanka Cinnamon oil (Cinnamomum zeylanicum), Citral, Clove Bud oil (Syzygium aromaticum), Cumin Seed oil (cuminum cyminum), Eucalyptus oil (Eucalyptus globulus), Eugenol, Geranium extract (Pelargonium graveolens), Marjoram oil (Origanum majorana), Neroli extract (Citrus aurantium), Peppermint oil (Mentha piperita L.), Rosem

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3

Sales, Gleilton Weyne Passos. "Evaluation of antimicrobial activity and mechanism of action of essential oil extracted from the bark of fruits Hymenaea l. Courbail." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11680.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>JatobÃ (Hymenaea courbaril l.) has an extensive history of use by natives of tropical forests, its fruits are composed of essential oils, tannins, bitter substances, resinous materials and pectic, starch and sugars. The objective of this study was to evaluate the antimicrobial activity of the essential oil extracted from the peel of fruits of Hymenaea courbaril l. (OEHc) and its mechanism of action on OSSA reference strains S. aureus (S. aureus ATCC 6538P and S. aureus 14458). For the evaluation of antimicrobial activity antimicrob

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4

Perdones, Montero Ángela. "ANTIFUNGAL CHITOSAN-BASED FILMS AND COATINGS CONTAINING ESSENTIAL OILS FOR FRUIT APPLICATIONS." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/59413.

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[EN] Chitosan films and coatings have been obtained, by incorporating different essential oils (EO) and using different homogenization conditions of the film forming emulsions, in order to obtain antifungal materials for fruit preservation. The effect of oleic acid (OA) on the stability of the initial emulsions and on the film properties was analysed. Coatings were applied to control fungal decay in strawberries. The blending of chitosan with methylcellulose (MC) was also used in coating applications to tomato plants and fruits to prevent fungal infections. The films' functional properties as

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5

Deterre, Sophie. "Influence des étapes de production du parfum issu des écorces d’orange amère (Citrus aurantium L. ssp amara) sur la qualité aromatique." Thesis, Paris, AgroParisTech, 2012. http://www.theses.fr/2012AGPT0023/document.

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La liqueur Grand Marnier® produite par la Société des Produits Marnier-Lapostolle (SPML), contient un arôme d'orange amère. Cet arôme, appelé parfum, est obtenu à partir de l'huile essentielle (HE) d'écorces d'orange amère qui ont subi un procédé de macération-distillation. Le but de ce travail de thèse a été de cibler les composés d'arôme clés des écorces d'orange amère et de comprendre leur comportement au cours de la production du parfum, afin de trouver des stratégies d'optimisation. Les axes d'étude ont été les suivants : (1) identification des composés volatils odorants de l'HE et du par

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6

Buckley-Smith, Marion. "The Use of Solubility Parameters to Select Membrane Materials for Pervaporation of Organic Mixtures." The University of Waikato, 2006. http://hdl.handle.net/10289/2625.

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Pevaporation is a method for separating volatile components from liquid mixtures at ambient temperatures. The paint processing industry uses Hansen solubility parameters (HSP) to indicate polymer solubility. The potential of this method to predict solvent-polymer affinity was investigated for screening potential membrane materials for the pervaporation of a model solution containing linalool and linalyl acetate (major components of lavender essential oil), in ethanol. Published HSP values were collated for various polymers, and statistically analysed to determine variations in HSP values for p

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7

Zhao, Tianming. "Caractérisations chimiques et biologiques d’extraits de plantes aromatiques et médicinales oubliées ou sous-utilisées de Midi-Pyrénées (France) et de Chongqing (Chine)." Thesis, Toulouse, INPT, 2014. http://www.theses.fr/2014INPT0039/document.

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Les régions de Midi-Pyrénées (France) et de Chongqing (Chine) sont riches en plantes aromatiques et médicinales dites oubliées (ou médiévales). Afin de valoriser pleinement les différentes bio-molécules extractibles de ces plantes, le concept de MAP-raffinerie a été créé et appliqué à une sélection de plantes issues de ces deux régions. Plusieurs technologies d’extraction utilisant l’eau comme solvant vert (hydrodistillation, distillation à la vapeur et extraction par eau sub-critique) ont ainsi été employées et leur impact tant sur la composition des huiles essentielles que sur la récupératio

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8

Alexandre, Francisco Serra Oliveira. "AnÃlise FitoquÃmica de Plantas do CearÃ: potencial farmacolÃgico de Cissus verticillata e composiÃÃo volatil de Myrcia sp." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6404.

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Universidade Federal do CearÃ<br>O presente trabalho relata o estudo quÃmico dos constituintes volÃteis das folhas e frutos de Myrcia sp., coletados no municÃpio de Amontada-CE em marÃo de 2005 e a obtenÃÃo de fraÃÃes e substÃncias provenientes do decocto das folhas frescas e do extrato etanÃlico das folhas secas de Cissus verticillata, bem como o estudo concomitante do seu potencial farmacolÃgico como hipoglicemiante atravÃs de testes realizados com a fraÃÃo solÃvel em metanol, fraÃÃo rica em tiramina e com a tiramina, obtidos de C. verticillata. Os Ãleos essenciais de Myrcea sp. foram analis

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9

Ito, Rosilene Kinue. "Avaliação da variação sazonal e atividade biológica dos óleos voláteis em duas espécies de Annonaceae." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/9/9138/tde-15092017-170729/.

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Nesse estudo, foram avaliados os óleos voláteis de Porcelia macrocarpa (Warm) R. E. Fries e Rollinia sericea (R. E. Fries) R. E. Fries com relação a sua composição ao longo das estações anuais e sua atividade antimicrobiana e anticolinesterase. Entre os componentes majoritários foram identificados apenas sesquiterpenos em ambas as espécies, bicicloelemeno (7%), biciclogermacreno (10%), germacreno-D (15%) e espatulenol (15%) para a P. macrocarpa e, α-muurolol (5%), Z-nerolidol (6%), bicicloelemeno (7%), germacreno-D (10%), biciclogermacreno (10%), β-cariofileno (11 %) e β-elemeno

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10

De, Rapper Stephanie. "Synergistic interactions of lavender essential oil." Thesis, 2014.

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Thesis (M.Pharm.)--University of the Witwatersrand, Faculty of Health Sciences, 2013.<br>Essential oils are not only used singularly but have been used in combination for many years. There is, however, very little scientific evidence to support the claims made for combined antimicrobial efficacy. With this in mind, a study was designed to investigate the antimicrobial activity of Lavender (Lavandula angustifolia) essential oil, in combination with other essential oils with antimicrobial relevance. The micro-dilution minimum inhibitory concentration (MIC) assay was undertaken, whereby the frac

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11

YEN, PEI-YUAN, and 閻培原. "Preparation and Controlled Release Properties of Poly(methyl methacrylate) Microcapsules Containing Volatile Essential Oil." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/898ccn.

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碩士<br>中國文化大學<br>化學工程與材料工程學系奈米材料碩士班<br>107<br>Poly (methyl methacrylate) is known as non-toxic and harmless to the human body. In this study, PMMA preparation by bulk polymerization. In addition to diluting with solvent. Then solvent was added in different weight ratios to dilute PMMA as microcapsules shell material. PMMA is characterized as good weather resistance, mechanical properties, easy processing, non-toxicity and resistance to chemicals. Prepared microcapsules by Physicochemical methods of solvent evaporation method coated essential oils. This experiment to explore the possibilities of

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12

CHEN, JIA-HUI, and 陳佳慧. "Studies on the volatile compounds of essential oil and oleoresin from green onion (Allium fistulosum L.)." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/64056665384741013423.

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13

Chiang, Charng Yi, and 江昶逸. "Studies on the Volatile Components of the Essential Oil and the Antioxidative and Antibacterial Activities of Extract of Eucalyptus citriodora." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/53318833163019209751.

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碩士<br>大葉大學<br>生物產業科技學系<br>99<br>In this study, several methods (distillation, supersonic and supercritical fluid extraction methods) are used to extract essential oil and other extracts (methyl alcohol is used as the solvent) from the leaves of the two types (glandular hair and non-glandular hair) of eucalyptus lemon-scented trees (Eucalyputs citriodora) for comparing their antioxidative and anti-bacterial. For volatile components analysis, GC and GC-MS were used and we found that essential oils from the leaves of the glandular hair type mainly comprised of citronellal (69.51%) and citronellol

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14

張菀津. "Classificatiom and Anti-termite Activity of Cypress Essential Oils and Volatile Components." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/pf33aa.

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碩士<br>國立嘉義大學<br>木質材料與設計學系研究所<br>106<br>This research aims to study chemotaxonomy of cypress wood, which including Chamaecyparis formosensis, Chamaecyparis obtusa var. formosana, Chamaecyparis obtusa, Callitropsis nootkatensis, Fokienia hodginsii, Callitris glaucophylla, Thuja plicata. It was based on the composition analysis of essential oils and volatile components. Essential oils and volatile components were extracted by water distillation and solid-phase microextraction (SPME), respectively. After identifng components by gas chromatography - mass spectrometry (GC-MS), then using the cluster

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15

Huang, Hsing-Hsuan, and 黃幸萱. "Studies on the volatile components, antioxidant and antimicrobial activities of Citrus grandis (L.) Osbeck essential oils." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/84123627709146821991.

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碩士<br>中國醫藥大學<br>藥用化妝品學系碩士班<br>100<br>Wentan pomelo (Citrus grandis (L.) Osbeck) is one of the most important economic fruit trees in Taiwan. Volatile compounds of leaves, flowers, and peels of Wentan pomelo has been studied by solid phase microextraction (SPME) coupled with GC and GC-MS in this study. The major constituents in leaves were sabinene and cis-β-ocimene; the dominated compound in flowers was linalool, and the main constituent in peels was limonene. Wentan pomelo flowers were distinguished to flower and buds, and they were separated by hands into six parts to analys volatile compoun

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16

Silva, André Gustavo Faria Alves da. "Monitoring beer volatile composition: from hops to storage impacts." Master's thesis, 2021. http://hdl.handle.net/10773/31137.

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In the last decades, the volatile composition of beer and hops has gained more attention. Beer is the most consumed alcoholic beverage in Europe, and its aroma characteristics are essentially associated with its volatile components. These components have different origins, namely they can result from the metabolism of yeast, from raw materials (such as hops), or they can be (bio)transformed during beer production. Hops play an essential role in the brewing process and they can contribute to bitterness (resins) and/or aroma (essential oils). These essential oils are essentially composed

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17

ZITO, Pietro. "THE ROLES OF PLANT VOLATILES AND THEIR POTENTIAL USE AS FLY ATTRACTANTS." Doctoral thesis, 2014. http://hdl.handle.net/10447/101524.

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The essential oils composition of the skin, pulp and seeds from fruits of two Sicilian cultivars of Opuntia ficus-indica (cv. Sanguigna and cv. Surfarina has been obtainedby hydrodistillation and the possible semiochemical roles have been investigated comparing the data with those reported in the literature. Several compounds identified in this study have been reported to influence the behaviour of Ceratitis capitata, a phytophagous which causes severe damages to severalcrops including O. ficus-indica and the kairomonal activity of the odour of the fruits seems provided by a blend of comp

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18

Lee, Kuan-Tseng, та 李冠增. "Evaluation the Volatile Compounds of Litsea Cubeba Fruit Essential Oils and Ameliorating Effect of its Powder on Memory and Learning Ability in Aβ-Induced Alzheimer''s Mice". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/17736323534041547441.

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碩士<br>國立中興大學<br>食品暨應用生物科技學系所<br>105<br>Litsea cubeba Persoon is a traditional seasoning used by Taiwanese aborigines. There are some studies indicating that Litsea cubeba fruits essential oil and its methanol extract have functions in antioxidation, sedation, analgesic and improvement of the central nervous system disorders such as anxiety and depression. Senile dementia is a neurodegenerative disease caused by aging and excessive oxidative damage in body, and Alzheimer''s disease (AD) has highest prevalence rate which caused by Amyloid β protein (Aβ plaques accumulation and hyperpho

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