Relevant bibliographies by topics / Essences and essential oils – Analysis

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Academic literature on the topic 'Essences and essential oils – Analysis'

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Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Essences and essential oils – Analysis"

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ARRAS, GIOVANNI, and MARIANNA USAI. "Fungitoxic Activity of 12 Essential Oils against Four Postharvest Citrus Pathogens: Chemical Analysis of Thymus capitatus Oil and its Effect in Subatmospheric Pressure Conditions." Journal of Food Protection 64, no. 7 (July 1, 2001): 1025–29. http://dx.doi.org/10.4315/0362-028x-64.7.1025.

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The fungitoxic activity against Penicillium digitatum, Penicillium italicum, Botrytis cinerea, and Alternaria citri of 12 essential oils (EOs) distilled from medicinal plants is reported. The results of the in vitro trials show strong fungitoxic activity of Thymus capitatus (L.) Hofmgg EOs, which inhibited the growth of the four fungi at a concentration of 250 ppm (vol/vol). The other 11 essences reduced the development of the fungi from 95 to 9% at 250 ppm (vol/vol). The fungitoxic activity of T. capitatus EOs (75, 150, and 250 ppm) on healthy orange fruits, inoculated with P. digitatum (108 conidia ml−1) by spraying and placed in 10-liter desiccators, was weak at atmospheric pressure (3 to 10% inhibition at all three concentrations), while in vacuum conditions (0.5 bar), conidial mortality on the exocarp was high (90 to 97% at all three concentrations).These data proved not to be statistically different from treatments with thiabendazole-TBZ (2,000 ppm). Scanning electron microscope observations showed that T. capitatus EO vapors altered the morphology of P. digitatum hyphae and conidia. The gas-chromatographic analyses of thyme EO indicated that carvacrol was present at 81 to 83%, p-cymene at 4.5 to 5%, γ-terpinene at 2.6 to 3.3%, caryophyllene at 1.5 to 1.6%, β-myrcene at 1.6%, and linalool at 1.1 to 1.2%. Carvacrol proved to be the most important fungitoxic compound among the thyme EO constituents, but, unlike thyme EO, it caused alterations to the fruit at the concentration of 75 ppm.
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Chaiyasut, Chaiyavat, Bhagavathi Sundaram Sivamaruthi, Jakkrit Wongwan, Kanyarat Thiwan, Wandee Rungseevijitprapa, Areewan Klunklin, and Wipada Kunaviktikul. "Effects of Litsea cubeba (Lour.) Persoon Essential Oil Aromatherapy on Mood States and Salivary Cortisol Levels in Healthy Volunteers." Evidence-Based Complementary and Alternative Medicine 2020 (July 26, 2020): 1–8. http://dx.doi.org/10.1155/2020/4389239.

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Aromatherapy is one of the complementary therapies to improve health. The aromatic essential oils have been used in the treatment procedure through inhalation of essential oil vapor, massage, and herbal bathing. Litsea species are generally used in traditional medicine, and Litsea cubeba (Lour.) Persoon is a potent fumigant plant, used in cosmetics and foods as essence. The chemical composition of the essential oil of different parts of L. cubeba has been found to be varied. L. cubeba essential oil (LEO) is known for the treatment of cognition-associated discomforts. The current study assessed the impact of inhalation of LEO on mood states and salivary cortisol levels of healthy people. Fifteen healthy volunteers were involved in the study. The Profile of Mood States (POMS) Questionnaire and ELISA methods were employed to determine the mood states and salivary cortisol level, respectively. (-)-β-pinene, β-citral, cis- and trans-citral, citronellal, limonene, linalool, and 6-methyl-5-hepten-2-one were detected in LEO by GC-MS analysis. The heart rate and blood pressure were not affected significantly during LEO exposure. The inhalation of LEO significantly improved the total mood disturbance and reduced the confusion among the healthy human subjects. LEO inhalation reduced the salivary cortisol level at a notable level. The results of the current study warrant further studies on the beneficial effect of LEO aromatherapy in healthy and diseased subjects to uncover the therapeutic nature of the L. cubeba plant.
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Smith-Palmer, Stewart, and Fyfe. "Antimicrobial properties of plant essential oils and essences against five important food-borne pathogens." Letters in Applied Microbiology 26, no. 2 (February 1998): 118–22. http://dx.doi.org/10.1046/j.1472-765x.1998.00303.x.

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Stea, Susanna, Alina Beraudi, and Dalila De Pasquale. "Essential Oils for Complementary Treatment of Surgical Patients: State of the Art." Evidence-Based Complementary and Alternative Medicine 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/726341.

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Aromatherapy is the controlled use of plant essences for therapeutic purposes. Its applications are numerous (i.e., wellbeing, labour, infections, dementia, and anxiety treatment) but often they have not been scientifically validated. The aim of the present study is to review the available literature to determine if there is evidence for effectiveness of aromatherapy in surgical patients to treat anxiety and insomnia, to control pain and nausea, and to dress wound. Efficacy studies of lavender or orange and peppermint essential oils, to treat anxiety and nausea, respectively, have shown positive results. For other aspects, such as pain control, essential oils therapy has shown uncertain results. Finally, there are encouraging data for the treatment of infections, especially for tea tree oil, although current results are still inconclusive. It should also be considered that although they are, allergic reactions and toxicity can occur after oral ingestion. Therefore, while rigorous studies are being carried out, it is important that the therapeutic use of essential oils be performed in compliance with clinical safety standards.
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Ismaili, Rachid, Sara Houbairi, Lanouari Sanâa, Moustaid Khadija, and Lamiri Abdeslam. "Etude De L’Activité Antioxydante Des Huiles Essentielles De Plantes Aromatiques Et Médicinales Marocaines." European Scientific Journal, ESJ 13, no. 12 (April 30, 2017): 323. http://dx.doi.org/10.19044/esj.2017.v13n12p323.

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Morocco is a traditional supplier of medicinal and aromatic plants to the world. This activity has resulted to the exploitation of wild plants than dried plants for herbal needs and food flavors. Many species are used for the production of plant extracts and other aromatic essences mainly for the pharmaceutical and cosmetics industry. Among these metabolites, there are essential oils that are mixtures of aromatic substances present in the form of tiny droplets in the leaves, fruit peel, resin, branches, and wood. These oils, however, is endowed with antioxidant properties. This study aims to evaluate the antioxidant activity of essential oils of three moroccan aromatic and medicinal plants: Thymus vulgaris, Mentha spicata, and Citrus limonum. The oil extraction was performed by steam distillation in a Clevenger type apparatus. Also, the antioxidant activity of these oils was evaluated by the method of DPPH (2,2-diphenyl-1-picrylhydrazyl), in comparison with the antioxidant synthetic, ascorbic acid. In the present work, the results showed that the antioxidant activity of three essential oils studied by the trapping method of free radical is moderate. Also, the oil of Thymus vulgaris has a strong activity which exceeds that of ascorbic acid. This was followed by the oil of Mentha spicata, while the lowest activity was observed in Citrus limonum.
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Smelcerovic, Andrija, Aleksandra Djordjevic, Jelena Lazarevic, and Gordana Stojanovic. "Recent Advances in Analysis of Essential Oils." Current Analytical Chemistry 9, no. 1 (January 1, 2013): 61–70. http://dx.doi.org/10.2174/157341113804486464.

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Barba, Carmen, Guillermo Santa-María, Marta Herraiz, and Rosa M. Martínez. "Direct enantiomeric analysis of Mentha essential oils." Food Chemistry 141, no. 1 (November 2013): 542–47. http://dx.doi.org/10.1016/j.foodchem.2013.03.013.

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Huong, Le T., Do N. Dai, Le T. M. Chau, and Isiaka A. Ogunwande. "Analysis of Essential Oils from Alpinia napoensis." Chemistry of Natural Compounds 54, no. 5 (September 2018): 992–94. http://dx.doi.org/10.1007/s10600-018-2532-7.

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Argentieri, Maria Pia, Barbara De Lucia, Giuseppe Cristiano, and Pinarosa Avato. "Compositional Analysis of Lavandula pinnata Essential Oils." Natural Product Communications 11, no. 3 (March 2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100305.

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The genus Lavandula includes about thirty species plus a number of intraspecific taxa and hybrids, which are distributed in the Mediterranean area. The traditional use of lavender both as perfume or medicinal plant is known since antiquity. Nowadays several species are extensively cultivated for the extraction of their essential oils (EOs) which are used in manufactured products like cosmetics and perfumes or in phytotherapy. Lavandula pinnata L. f. (syn L. pinnata Lundmark) is a rare species native to the Canary Islands used in folk medicine as relaxant and also a valuable remedy against bites. To the best of our knowledge, EOs from L. pinnata have been very little studied. The present paper reports on the quali- and quantitative compositional profile of the EOs distilled (by a Spring type apparatus) from the aerial parts (flowers and leaves) of this species cultivated in soilless conditions. Chemical analyses by means of GC and GC-MS techniques have indicated that oxygenated monoterpenes are the main constituents of both the flowers (68.30%) and the leaves (83.65%). Carvacrol is the main compound which characterizes the EOs of this species. In addition, discrete amounts of spathulenol (12.22%) and caryophyllene oxide (14.62%) have been detected in flowers EOs, while leaves EOs contained small amounts of carvacrol methyl ether (2.52%).
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Zwaving, J., and R. Bos. "Analysis of the Essential Oils of FiveCurcumaSpecies." Planta Medica 56, no. 06 (December 1990): 529–30. http://dx.doi.org/10.1055/s-2006-961090.

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Dissertations / Theses on the topic "Essences and essential oils – Analysis"

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Eyres, Graham Terence, and n/a. "Determination of character-impact odorants in hop essential oils using hyphenated techniques in gas chromatography." University of Otago. Department of Food Science, 2007. http://adt.otago.ac.nz./public/adt-NZDU20080125.143442.

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Hops (Humulus lupulus L.) are an indispensable component of beer, with the essential oil responsible for imparting distinctive odour and aroma characteristics to beer. However, not all character-impact odorants in hop essential oil have been identified and hop aroma in beer is still not completely understood. The composition of hop essential oil is very complex with 485 compounds currently identified in the literature, and recent research suggests that up to 1000 compounds may actually be present. Only a certain number will be present at concentrations above threshold and make a direct contribution to the odour of the oil. In addition, many important odorants are only present at trace concentrations. Gas chromatography-olfactometry (GC-O) using human assessors is the best way to locate potent odorants and facilitate their identification. A novel methodology was developed to identify the character-impact odorants in hop essential oil samples using hyphenated techniques in gas chromatography. GC-O was used to locate odour active compounds and determine relative importance using CharmAnalysis[TM] according to the odour potency principle. Due to the chemical complexity of the samples, considerable co-elution of peaks occurs during single column gas chromatography (1DGC), making the detection and identification of character-impact odorants challenging. Therefore, comprehensive two-dimensional gas chromatography (GCxGC) combined with time-of-flight mass spectrometry (TOFMS) was used to resolve and identify compounds eluting in the odour active regions. The methodology was developed in a case study on coriander (Coriandrum sativum) and wild coriander (Eryngium foetidum) leaf essential oils. During GC-O analysis of these samples it was recognised that odour active regions frequently coincide with several co-eluting compounds. To address this, a heart-cut multidimensional gas chromatography-olfactometry (MDGC-O) instrument was developed to resolve these 'co-eluting odour clusters' and determine the compound(s) responsible for the odour perception. The 'spicy' character of hops is considered to be a desirable attribute in beer associated with 'noble hop aroma'. However, the compounds responsible have yet to be adequately elucidated. This character was investigated using a commercial 'Spicy' fraction of hop essential oil, selectively enriched for monoterpene and sesquiterpene alcohols. The odour active compounds in (i) the spicy fractions and (ii) the whole essential oils of four different hop varieties were compared using the presented methodology. A compound with an intense 'woody, cedarwood' odour was determined to be a potent, character-impact odorant in all samples. This odour coincided with a complex region of the chromatogram where up to thirteen compounds were co-eluting. The peak responsible for this odour was determined by (i) correlation of peak areas with odour potency (Charm) values and (ii) MDGC-O. The compound was tentatively identified by GCxGC-TOFMS as 14-hydroxy-β-caryophyllene, which has not previously been reported as an odorant in hop essential oil. It was concluded that this compound and other 'woody, cedarwood' odorants contributed to the 'spicy' character of the investigated hop samples. Compounds previously associated with noble hop aroma, notably caryophyllene oxide, humulene epoxides I and II, and humulenol II, did not contribute to the odour character of the hop samples. Other potent odorants that were identified in the whole essential oil and spicy fractions of hops were: geraniol, linalool, β-ionone, eugenol, isovaleric acid, and β-damascenone. While myrcene was a moderately potent odorant in the whole hop essential oil samples, the abundant sesquiterpene hydrocarbons α-humulene, β-caryophyllene and β-farnesene did not significantly contribute to the odour character.
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Chiguvare, Herbert. "Phytochemical analyses and Brine shrimp (Artemia Salina) lethality studies on Syzygium cordatum." Thesis, University of Fort Hare, 2013. http://hdl.handle.net/10353/d1004352.

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Syzygium cordatum Hoscht ex. C Krauss, also known as water berry, is normally used by the people of South Africa for respiratory ailments including tuberculosis, stomach complaints, treatment of wounds and as emetics. An extract of the leaves can be used as a purgative for diarrhoea treatment. The leaves of Syzygium cordatum Myrtaceae were obtained from the Eastern Cape Province of South Africa, air dried and sequential solvent extraction was done to obtain various non volatile crude extracts. The volatile extract, that is the essential oil was extracted from the leaves using hydrodistillation and analysis of compounds was done by GC/MS for composition. 32 compounds were obtained from the fresh leaves and 18 compounds were obtained from the dry leaves. The fresh oil contains caryophyllene (11.8 percent) and caryophyllene oxide (11.1 percent) as the main sesquiterpene component. α-Pinene(5.0 percent) was the only monoterpene compound identified in the fresh oil in substantial amount. The dry leaves oil had copanene (17.0 percent), β-Caryophellene (26.0 percent), cubenol (6.5 percent) and caryophellene oxide (14.2 percent) as the dominant constituent of the oil. Summary of the classes of compounds in the oil revealed that the chemical profile of both oils were dominated by sesquiterpenoid compounds. This is the first time that terpenoids compounds are being identified in both the fresh and dry leaf oil of S. cordatum. Hexane leaf extract was selected due to the interest in the terpenoid compounds. Column chromatography of the hexane crude gave five (5) of which two are fully reported. The isolates were fully elucidated using spectroscopic methods to be β-Sitosterol (HC3) and Friedela-3-one (HC1A/HC1D). Cytotoxicity analysis was carried out on the crude using the Brine shrimps assay. Isolates 1C and1D showed significant lethality using the brine shrimps assay with lethality values (LC50) of 4.105mg/ml for HC1C and 4.11mg/ml for 1D/1A respectively.
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Leonardo, Marcelo [UNESP]. "Produção de óleo essencial associado à deficiência hídrica em plantas Ocimum basilicum L. cv. genovese." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/103422.

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Made available in DSpace on 2014-06-11T19:32:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-03-05Bitstream added on 2014-06-13T18:44:01Z : No. of bitstreams: 1 leonardo_m_dr_botfca.pdf: 849833 bytes, checksum: 14dfc79b16640209ce661eb409949474 (MD5)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Universidade Estadual Paulista (UNESP)
Um dos mais importantes fatores ambientais e agronômicos que afetam a produção de metabólitos secundários em plantas é a água. Quantidade limitada de água tem efeito negativo sobre o crescimento e desenvolvimento das plantas. Entretanto, a deficiência hídrica (DH), muitas vezes tem se mostrado positiva no acúmulo de constituintes ativos em espécies medicinais, aromáticas e condimentares. Verificou-se a influência da DH na participação de assimilados, acúmulo e na composição do óleo essencial em manjericão (Ocimum basilicum L.). Paralelamente, foram avaliados parâmetros bioquímicos relacionados com a resposta das plantas a DH. Os tratamentos foram constituídos por dois blocos, T1 (controle) que foi mantido sempre irrigado e T2 (DH) submetido a três níveis de DH. Nas plantas dos tratamentos do bloco T2 (DH), foi suspenso o fornecimento de água quando 50% das plantas iniciaram seu florescimento. Observou-se que as plantas cultivadas sob DH, responderam com aumento da concentração de óleo essencial na inflorescência e nas folhas. O maior rendimento de óleo por planta, foi encontrado nas plantas do controle, principalmente no tecido da inflorescência, inversamente do observado para o tecido foliar. Em termos qualitativos, a análise dos componentes do óleo revelou que os diferentes níveis de DH não alteraram o padrão conhecido para esta espécie. Constatou-se que todos os parâmetros biométricos foram influenciados negativamente pela DH. A análise da atividade enzimática indicou que o estresse causado por DH ativou todas as enzimas relacionadas ao sistema de resposta antioxidativo, além de induzir ao acúmulo de L-prolina.
The water is one of the most important agronomic and environmental factors that affect the production of secondary metabolites in plants. Limited amount of water has negative effect on growth and development of plants. However, the hydric deficiency (HD), a lot of times have been shown positive in the active constituents accumulation in medicinal species, aromatic and spices. The influence of HD was verified in participation of assimilate, accumulation and in the essential oil composition of basil (Ocimum basilicum L.). At the same time, biochemical parameters related with HD in plants were studied. The treatments were constituited by two blocks, T1 (control) that was maintained well irrigated and T2 (HD) submitted to three levels of HD. In T2 (HD) treatments, the water supply was suspended when 50% of the plants began flowering. In plants cultivated under HD was observed that the essential oil concentration was increased in the inflorescences and leaves. The largest oil income was found in the plants of control, mainly in inflorescences material, inversely of observed in leaves material. In qualitative terms, the oil components analysis revealed that the different levels of HD didn't alter the known standarts for this species. It was verified that all of the biometrical parameters were negatively influenced by HD. The enzymatic activity analysis indicated that the stress caused by HD had activated all of the enzymes related to the antioxitative response system, besides inducing the accumulation of L-proline.
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Ribeiro, Jane Cristina Lara. "Análise química e biológica de metabólitos voláteis isolados de plantas das famílias Myrtaceae e Zingiberaceae." Universidade Tecnológica Federal do Paraná, 2013. http://repositorio.utfpr.edu.br/jspui/handle/1/638.

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Neste trabalho foi investigado a composição química de metabólitos voláteis extraídos de quatro plantas Pimenta pseudocaryophyllus (Myrtaceae), Psidium cattleyanum (Myrtaceae), Hedychium coronarium (Zingiberaceae) e Costus spiralis (Zingiberaceae) através da cromatografia gasosa acoplada à espectrometria de massas (CG/MS). São apresentados resultados relativos à composição química sazonal do óleo essencial obtido das folhas de Pimenta pseudocaryophyllus, em amostras coletadas bimestralmente de janeiro a novembro de 2009. Em novembro foram observadas as maiores concentrações relativas aos constituintes majoritários do óleo essencial das folhas dessa espécie, sendo o chavibetol (70,90%) e metileugenol (20,70%). Além disso, foram avaliadas as atividades antimicrobianas do óleo essencial das folhas de P. pseudocaryophyllus através de técnicas de difusão com discos e microdiluição em caldo. O chavibetol, composto majoritário mostrou-se o responsável pela maior atividade antifúngica. São apresentados também a sazonalidade do óleo essencial obtido do rizoma de Hedychium coronarium, em amostras coletadas bimestralmente de março a janeiro de 2012 a 2013. Em março foram observadas as maiores concentrações relativas aos constituintes majoritários do óleo essencial do rizoma dessa espécie, sendo β- pineno (31,82%) e 1,8 cineol (28,30%). O estudo populacional dos metabólitos voláteis das folhas do Psidium cattleyanum coletados em Curitiba-PR identificou vinte e oito componentes sendo majoritário o lavander lactona (12,26%). Por outro lado, trinta e um compostos foram identificados no óleo essencial dessa mesma espécie em ecossistema de restinga, sendo majoritário o α-tujeno (25,20%). A extração de metabólitos voláteis das flores H. coronarium e brácteas da C. spiralis foi efetuada através do processo de aeração, fornecendo o linalol (43,58%) e o β- pineno (23,25%), respectivamente como os compostos majoritários.
In this work we investigated the chemical composition of volatile metabolites extracted from four plants Pepper pseudocaryophyllus (Myrtaceae), Psidium cattleyanum (Myrtaceae), Hedychium coronarium (Zingiberaceae) and Costus spiralis (Zingiberaceae) by gas chromatography-mass spectrometry (GC / MS). Results are presented relative to seasonal chemical composition of the essential oil obtained from the leaves of Pepper pseudocaryophyllus in samples collected bimonthly from January to November 2009. In November showed the highest concentrations on the major constituents of the essential oil from the leaves of this species, being chavibetol (70.90%) and methyleugenol (20.70%). Furthermore, we evaluated the antimicrobial activity of essential oil from the leaves of P. pseudocaryophyllus through techniques of diffusion disk and broth microdilution. The chavibetol, major compound was shown to be responsible for the greatest antifungal activity. We present also the seasonality of the essential oil obtained from the rhizome of Hedychium coronarium in samples collected bimonthly from March to January 2012-2013. In March the highest concentrations were observed on the major constituents of the essential oil of the rhizome of this species, and β-pinene (31.82%) and 1,8 cineole (28,30%). The population study of volatile metabolites from the leaves of Psidium cattleyanum collected in Curitiba identified twenty-eight components, the majority being lavander lactone (12.26%). Conversely, thirty-one compounds were identified in the essential oil of the species ecosystem in restinga provided the major constituent being the α-tujeno (25.20%). The extraction of volatile metabolites of flowers H. coronarium and bracts of C. spiralis was effected through the aeration process, providing linalool (43.58%) and β-pinene (23.25%), respectively as the major compounds.
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Leonardo, Marcelo 1974. "Produção de óleo essencial associado à deficiência hídrica em plantas Ocimum basilicum L. cv. genovese /." Botucatu : [s.n.], 2007. http://hdl.handle.net/11449/103422.

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Orientador: Fernando Broetto
Banca: Roberto Lyra Villas Bôas
Banca: Magali Ribeiro da Silva
Banca: Marcia Ortiz Mayo Marques
Banca: Otto Jesu Crocomo
Resumo: Um dos mais importantes fatores ambientais e agronômicos que afetam a produção de metabólitos secundários em plantas é a água. Quantidade limitada de água tem efeito negativo sobre o crescimento e desenvolvimento das plantas. Entretanto, a deficiência hídrica (DH), muitas vezes tem se mostrado positiva no acúmulo de constituintes ativos em espécies medicinais, aromáticas e condimentares. Verificou-se a influência da DH na participação de assimilados, acúmulo e na composição do óleo essencial em manjericão (Ocimum basilicum L.). Paralelamente, foram avaliados parâmetros bioquímicos relacionados com a resposta das plantas a DH. Os tratamentos foram constituídos por dois blocos, T1 (controle) que foi mantido sempre irrigado e T2 (DH) submetido a três níveis de DH. Nas plantas dos tratamentos do bloco T2 (DH), foi suspenso o fornecimento de água quando 50% das plantas iniciaram seu florescimento. Observou-se que as plantas cultivadas sob DH, responderam com aumento da concentração de óleo essencial na inflorescência e nas folhas. O maior rendimento de óleo por planta, foi encontrado nas plantas do controle, principalmente no tecido da inflorescência, inversamente do observado para o tecido foliar. Em termos qualitativos, a análise dos componentes do óleo revelou que os diferentes níveis de DH não alteraram o padrão conhecido para esta espécie. Constatou-se que todos os parâmetros biométricos foram influenciados negativamente pela DH. A análise da atividade enzimática indicou que o estresse causado por DH ativou todas as enzimas relacionadas ao sistema de resposta antioxidativo, além de induzir ao acúmulo de L-prolina.
Abstract: The water is one of the most important agronomic and environmental factors that affect the production of secondary metabolites in plants. Limited amount of water has negative effect on growth and development of plants. However, the hydric deficiency (HD), a lot of times have been shown positive in the active constituents accumulation in medicinal species, aromatic and spices. The influence of HD was verified in participation of assimilate, accumulation and in the essential oil composition of basil (Ocimum basilicum L.). At the same time, biochemical parameters related with HD in plants were studied. The treatments were constituited by two blocks, T1 (control) that was maintained well irrigated and T2 (HD) submitted to three levels of HD. In T2 (HD) treatments, the water supply was suspended when 50% of the plants began flowering. In plants cultivated under HD was observed that the essential oil concentration was increased in the inflorescences and leaves. The largest oil income was found in the plants of control, mainly in inflorescences material, inversely of observed in leaves material. In qualitative terms, the oil components analysis revealed that the different levels of HD didn't alter the known standarts for this species. It was verified that all of the biometrical parameters were negatively influenced by HD. The enzymatic activity analysis indicated that the stress caused by HD had activated all of the enzymes related to the antioxitative response system, besides inducing the accumulation of L-proline.
Doutor
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Venter, Andre. "Comprehensive two-dimensional supercritical fluid and gas chromatography (SFCxGC)." Thesis, Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-03132003-161136.

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Gersbach, Paul Vincent, University of Western Sydney, and of Science Technology and Environment College. "Aspects of essential oil secretion in vascular plants." THESIS_CSTE_XXX_Gersbach_P.xml, 2001. http://handle.uws.edu.au:8081/1959.7/775.

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A study of some aspects of essential oil secretion in plants was conducted. The first part of the study involved analysis of the volatile terpenoid content and composition of leaf extracts from a range of Australian native plants by gas chromatography and mass spectrometry. Secretory structures were studied by several microscopic imaging techniques including conventional bright and dark field optical microscopy, confocal microscopy, and scanning (SEM) and transmission (TEM) electron microscopy. Three methods were employed for scanning electron microscopy. Sample material was prepared for conventional SEM by chemical fixation and rapid freeze fixation, and fresh material was imaged by environmental SEM. These methods were compared, and the images acquired by environmental SEM were invariably of a superior standard as the biological integrity of the samples was retained throughout, and the samples were free of process-induced artefacts. Several other tests were conducted and results discussed in some detail. In the final part of the study, aspects of essential oil secretion were examined by histochemical methods. The first of these was a new method based on traditional approaches to histochemistry. The monoterpene phenols thymol and carvacrol were located in glandular trichomes of Lamiaceae species by means of a colour-change reaction of the phenols with a nitrosophenol/acid reagent. The second used magnetic resonance imaging by a chemical shift selective method to locate, non invasively, the aromatic monoterpenes thymol and anethole in secretory structures in the fruit of Carum copticum (Apiaceae) and the leaves of Backhousia anisata (Myrtaceae) respectively.
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李曉岑. "廣藿香揮發油化學成分研究." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2447329.

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Nyiramana, Lunianga Marie. "Stratégies de mise en marché des huiles essentielles québécoises /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1991. http://theses.uqac.ca.

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Phillips, Alicia Kyser Appel Arthur G. "Toxicity and repellency of essential oils to the German cockroach (Dictyoptera: Blattellidae)." Auburn, Ala., 2009. http://hdl.handle.net/10415/1942.

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Books on the topic "Essences and essential oils – Analysis"

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Citrus oils: Composition, advanced analytical techniques, contaminants, and biological activity. Boca Raton, FL: CRC Press, 2011.

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Ntezurubanza, Léopold. Huiles essentielles du Rwanda. Chicoutimi, Québec: Laboratoire d'analyse et de séparation des essences végétales, Université du Québec à Chicoutimi, 2000.

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Chromatography of aroma compounds and fragrances. Heidelberg: Springer, 2010.

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Lawrence, Brian M. Essential oils, 2001-2004. Carol Stream, IL: Allured Pub. Corp., 2006.

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Susan, Drury, ed. Healing oils and essences. London: Hale, 1988.

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Baruah, Akhil, and Subhan C. Nath. Natural essential oils: Fragrances and flavours. Jaipur: Aavishkar Publishers, Distributors, 2013.

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375 essential oils and hydrosols. Berkeley, Calif: Frog, 1999.

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Essential oils in Nepal: A practical guide to essential oils and aromatherapy. Kathmandu: Himalayan Bio Trade Pvt. Ltd., 2009.

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Sellar, Wanda. The directory of essential oils. Saffron Walden, Essex: C.W. Daniel Co., 1999.

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The directory of essential oils. Saffron Walden: C.W. Daniel, 2001.

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Book chapters on the topic "Essences and essential oils – Analysis"

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Sawamura, Masayoshi, Nguyen Thi Minh-Tu, Simon Muhoho Njoroge, Xiaolin Yu, C. Hanny Wijaya, Hee-Sun Song, and Marco Poiana. "Compositional Analysis." In Citrus Essential Oils, 37–163. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470613160.ch3.

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Thao, Nguyen Thi, and Atsushi Satake. "Enantiomeric and Stable Isotope Analysis." In Citrus Essential Oils, 165–200. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470613160.ch4.

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Arigò, Adriana, Mariosimone Zoccali, Danilo Sciarrone, Peter Q. Tranchida, Paola Dugo, and Luigi Mondello. "Analysis of Essential Oils." In Handbook of Essential Oils, 191–228. Third edition. | Boca Raton : CRC Press, [2020]: CRC Press, 2020. http://dx.doi.org/10.1201/9781351246460-7.

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Kiritsakis, A., and P. Markakis. "Olive Oil Analysis." In Essential Oils and Waxes, 1–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84023-4_1.

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Satyal, Prabodh, and William N. Setzer. "Adulteration Analysis in Essential Oils." In Essential Oil Research, 261–73. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-16546-8_9.

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Misra, S., and A. Ghosh. "Analysis of Epicuticular Waxes." In Essential Oils and Waxes, 205–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84023-4_12.

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Dobson, H. E. M. "Analysis of Flower and Pollen Volatiles." In Essential Oils and Waxes, 231–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84023-4_13.

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Kobayashi, A., and M. Kawakami. "Analysis of Essential Oils of Tea." In Essential Oils and Waxes, 21–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84023-4_2.

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Yokouchi, Y. "Analysis of Monoterpene Hydrocarbons in the Atmosphere." In Essential Oils and Waxes, 297–307. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84023-4_16.

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Pieters, L. A. C., and A. J. Vlietinck. "Rotation Locular Countercurrent Chromatography Analysis of Croton Oil." In Essential Oils and Waxes, 185–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84023-4_10.

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Conference papers on the topic "Essences and essential oils – Analysis"

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Liu, Chien-Wei, Shen-Tzu Lin, and Ching-Sung Wang. "Emotional Perception Analysis of Fragrance Essential Oils." In Proceedings of the 2019 5th International Conference on Humanities and Social Science Research (ICHSSR 2019). Paris, France: Atlantis Press, 2019. http://dx.doi.org/10.2991/ichssr-19.2019.39.

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Gonzalez, Araceli Lopez, P. A. Vazquez Landaverde, and Miriam G. Rodriguez Olvera. "Authenticity analysis of orange (Citrus sinensis) essential oils." In 2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT). IEEE, 2019. http://dx.doi.org/10.1109/icasat48251.2019.9069529.

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OZPOLAT, Zeynep, Gokce YILDIRIM, and Erkan TANYILDIZI. "Analysis of Relations between Essential Oils and Diseases by Using Association Rules." In 2018 International Conference on Artificial Intelligence and Data Processing (IDAP). IEEE, 2018. http://dx.doi.org/10.1109/idap.2018.8620814.

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Nur Aidha, Novi, Retno Yunilawati, and Irma Rumondang. "Method Development for Analysis of Essential Oils Authenticity using Gas Chromatography-Mass Spectrometry (GC-MS)." In 2nd International Conference of Essential Oil Indonesia. SCITEPRESS - Science and Technology Publications, 2019. http://dx.doi.org/10.5220/0009956000410046.

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Hariadi, Puspawan, Hartini Haritani, Yuyun Febriani, Abdul Rahim, Tri Puspita Yuliana, and Ersi Arviana Ikhsan. "Analysis of Essential Oils Utilization in Enhancing Immune Systems in the Pandemic Era." In 4th International Conference on Sustainable Innovation 2020–Health Science and Nursing (ICoSIHSN 2020). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/ahsr.k.210115.099.

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Blázquez, Maria Amparo, and Antolín Cantó. "Standardization of commercial cinnamon essential oils by gas chromatography-mass spectrometry analysis ." In MOL2NET 2017, International Conference on Multidisciplinary Sciences, 3rd edition. Basel, Switzerland: MDPI, 2017. http://dx.doi.org/10.3390/mol2net-03-04636.

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Sovrlić, Miroslav, Aleksandar Rancić, Jovica Tomović, and Emina Mrkalić. "Comparative phytochemical analysis of the essential oils of Piper nigrum L. from four different countries." In 4th International Electronic Conference on Medicinal Chemistry. Basel, Switzerland: MDPI, 2018. http://dx.doi.org/10.3390/ecmc-4-05607.

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A.A., Komarov, Stepanov M.B., Nayda N.M., and Omelchenko M.P. "NEW TYPES OF FERTILIZERS FOR THE PRODUCTION OF ESSENTIAL OILS AND MEDICINAL PLANTS." In НАУЧНЫЙ И ИННОВАЦИОННЫЙ ПОТЕНЦИАЛ РАЗВИТИЯ ПРОИЗВОДСТВА, ПЕРЕРАБОТКИ И ПРИМЕНЕНИЯ ЭФИРОМАСЛИЧНЫХ И ЛЕКАРСТВЕННЫХ РАСТЕНИЙ. ИТ «АРИАЛ», 2021. http://dx.doi.org/10.33952/2542-0720-2021-10-11-06-1.

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Based on the analysis of the use of traditional mineral and organic fertilizers, as well as preparations, an assessment of their use for the production of essential oils and medicinal plants is presented. The limited possibilities of their application are related to the contradictions that arise in the "dose-effect" - "dosequality" systems. The article presents an assessment of the use of new types of highly effective polymer-based fertilizers that are promising for the production of essential oils and medicinal plants. Including microelement fertilizers "Aquadon-Micro", macroelement fertilizers with additives of microelements of the "Zelenit" and "Kora" series, as well as complex polymer fertilizers of the "Vitanoll" series, where the polymer matrix includes not only food elements, but also means of controlling the growth and development of plants.
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Liu, Linqi, Chenxi Zhao, and Hongzhuang Fang. "Comparative analysis of essential oils from different Curcumae Rhizoma and Curcumae Longae Rhizoma herbs by GC-MS combined with retention indices." In International conference on Human Health and Medical Engineering. Southampton, UK: WIT Press, 2014. http://dx.doi.org/10.2495/hhme130621.

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Nehme, Gabi. "Analysis of 100 and 700 rpm Cycles in Boundary Lubrication Using Fluorinated Mix Interactions Under Extreme Boundary Lubrication." In STLE/ASME 2010 International Joint Tribology Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ijtc2010-41044.

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Tribology and solid mechanics are essential when studying engine lubrications. Very reproducible boundary lubrication tests were conducted as part of Design of Experiment software (DOE) to study the behavior of fluorinated mix in developing environmentally friendly (reduced P and S) anti-wear additives for future engine oil formulations using ball on cylinder testing protocol. In this study fully formulated oil and ZDDP plain oils were tested under the protocol of two cycles. A 100 rpm cycle was used for the first 5000 revolutions and a 700 rpm cycle was used until failure or 100000 revolutions whichever comes first. All tests were generated under extreme boundary lubrication (Hertzian contact pressure of 2.72 GPa). Design of Experiment (DOE) with 2 level factorial was used to investigate the failure and wear responses with respect to fluorinated mix interactions in plain and fully formulated oils. The two cycle’s tests indicate better performance than the one cycle test. Findings indicate that the most significant factors, affecting friction and wear are fluorinated mix concentrations together with oil formulation.
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Reports on the topic "Essences and essential oils – Analysis"

1

Castro, Ricardo Dias de. Chemical and antifungal analysis of essential oils and phytochemicals against Candida albicans. Science Repository OÜ, March 2019. http://dx.doi.org/10.31487/j.cmr.2018.01.005.

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