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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Produção de biomassa, análise sensorial de chás, caracterização química do óleo essencial por cromatografia gasosa uni e bidimensional abrangente de clones selecionados de Lippia alba (Mill.) N. E. Br quimiotipo citral /

Silva, Júlio César Rodrigues Lopes January 2019 (has links)
Orientador: Marcia Ortiz Mayo Marques / Banca: Beatriz Helena Lameiro de Noronha Sales Maia / Banca: Filipe Pereira Giardini Bonfim / Resumo: Lippia alba (Mill.) N.E.Br, pertencente à família Verbenaceae é uma planta medicinal amplamente distribuída na América do Sul. A composição química do óleo essencial da espécie, a qual derivam suas propriedades terapêuticas mostra-se variável, com divisão em quimiotipos. Entre eles, o quimiotipo citral destaca-se pelas ações calmante e ansiolítica, sendo suas folhas empregadas na medicina popular na forma de chá. Dessa forma, visando o potencial uso econômico de Lippia alba, este estudo teve como objetivos avaliar clones de Lippia alba do quimiotipo citral quanto a produtividade de biomassa e óleo essencial, perfil sensorial do chá e composição química do óleo essencial pelas técnicas de cromatografia gasosa unidimensional (CG) e bidimensional abrangente (CG×CG). Entre os clones, dois mostraram-se promissores para inserção em sistemas de produção, com foco em maior produção de biomassa e óleo essencial. Os perfis químicos dos óleos essenciais dos clones são variáveis entre si. O emprego do sistema CG×CG resultou em maior capacidade de detecção dos constituintes dos óleos essenciais. Ao todo foram identificadas 47 substâncias por CG×CG, contra 26 no CG. A maior sensibilidade e resolução fazem do sistema CG×CG uma importante ferramenta metabolômica no estudo dos constituintes voláteis de Lippia alba. Os clones X6M?C e X6M7 se destacaram quanto as características sensoriais de aroma e sabor, com potencial de inclusão na indústria alimentícia na forma de chá. / Abstract: Lippia alba (Mill.) N.E.Br, from the Verbanaceae family is a medicinal plant widely distributed in the South America. The species's essential oil chemical composition, which derives its therapeutic properties, shows itself as variable, with division in chemotypes. Among them, the citral chemotype highlights itself for the soothing and anxiolytic actions, being its leaves used in the popular medicine in the form of tea. Thus, aiming the potential economic use of the Lippia alba, this work has as objectives evaluate the clones of the citral chemotype of Lippia alba in terms of productivity of biomass and essential oil, sensorial profile and chemical composition of the essential oil by using the one-dimensional gas Chromatography (CG) and comprehensive twodimensional gas chromatography(CGxCG). Among the clone, two stood out as promising to insertion in production systems, with focus on a bigger production of biomass and essential oil. The chemical profiles of the clones's essential oil are variable among themselves. The use of the CGxCG system have resulted in a bigger capacity of identification of the essential oils constituents. Altogether, 47 substances have been identified by CGxCG, against 26 in CG. The better sensibility and resolution are part of the CGxCG, an important metabolomics tool of the volatile constituents of Lippia alba. The X6M?C e X6M7 clones stood out in terms of sensorial features of flavor, with potential of inclusion in the food industry in the form of tea. / Mestre
2

The efficacy of a homoeopathic mother tincture complex (Vitex agnus castus, Melissa officinalis and Valeriana officinalis) in the management of premenstrual dysphoric disorder

Sukati, Behlulile Nonsikelelo Stoppy 05 1900 (has links)
Submitted in partial fulfillment of the requirements for the Degree of Master of Technology in Homoeopathy, Durban University of Technology, Durban, South Africa, 2018. / Research Problem Statement Premenstrual dysphoric disorder (PMDD) is a severe form of premenstrual syndrome (PMS) that involves a combination of emotional and physical symptoms that result in significant functional impairment. PMDD can be debilitating and there are multiple treatment options available, but these are not without side effects. Although complimentary or alternative medicine may be beneficial in treating PMDD, however, there is not enough data available to validate their effectiveness. This study aimed at comparing and determining the efficacy of a homoeopathic mother tincture complex (Vitex agnus castus, Melissa officinalis and Valeriana officinalis) compared to placebo in the management of PMDD. Methodology A sample size of 30 consenting female participants with PMDD who met the inclusion criteria as set out in the Diagnostic and Statistical Manual of Mental Disorders. The duration of the study was three months for each participant. Participants were randomly divided into experimental and placebo groups with three consultations over the study period where Kessler Psychological Distress Scale and Visual Analogue Scale were applied. Non-parametric and inferential analysis of data were performed to analyse and compare the effects of treatment and time on symptoms over the three consultation periods (α.05). Results Results for both scales showed no statistical significance in the interaction between time and treatment. The results showed no statistical differences between the control and experimental group in the management of PMDD. However, the mean value measured in the experimental group were consistently lower than the control. Conclusion The conclusion derived from this study is that the homoeopathic complex studied is not effective in the treatment of PMDD. None of the results showed significant differences between the treatment and the placebo group trials. Further studies are highly recommended in this field. / M
3

Vaistinių melisų ištraukų technologija ir kokybės vertinimas / The analysis of quality and technology of extracts of Melissa officinalis

Raišytė, Toma 01 July 2014 (has links)
Darbo tikslas: Pagaminti vaistinių melisų ištraukas ir įvertinti jų kokybę. Darbo uždaviniai: 1. Remiantis mokslinės literatūros duomenimis parinkti tinkamą vaistinių melisų skystą vaisto formą, atsižvelgiant į veikliosios medžiagos farmakologines savybes bei parinkti analizės metodus preparatų kokybei įvertinti; 2. Nustatyti ekstrahento (etanolio ir vandens) įtaką melisų ištraukų kokybei; 3. Palyginti ekstrahavimo metodo daromą įtaką vaistinių melisų ištraukų kokybei; 4. Ištirti žaliavos ir ekstrahento santykio daromą įtaką vaistinių melisų ištraukų kokybei. Metodika: 1. Tyrimo objektas – vaistinių melisų ištraukos; 2. Vaistinių melisų vandeninių ir etanolinių ištraukų technologija: a) Ištraukos gamintos klasikinės maceracijos ir perkoliacijos metodais; b) Etanolinės ištraukos gamintos ekstrahuojant ultragarsu ir kokybė vertinama po 20 min., 30 min. ir 40 min. ekstrahavimo; 3. Taikytas spektrofotometrinis metodas pagal Folin – Ciocalteau metodiką, norint nustatyti suminį polifenolinių junginių kiekį pagal KRE; 4. Sauso likučio tyrimas atliktas gravimetriniu metodu; 5. Antimikrobinis aktyvumas nustatytas pagal Ph. Eu. 01/2002, 2.6.12 metodiką. Rezultatai: Spektrofotometriniu metodu nustatyta, kad ekstrahentas turi įtakos veikliųjų junginių išsiskyrimui: didesnis suminis polifenolinių junginių bei sauso likučio kiekis nustatytas, kai ekstrahentu pasirenkamas etanolis, o ne vanduo. Vertinant etanolio koncentraciją nustatyta, kad mažiausiai veikliųjų junginių... [toliau žr. visą tekstą] / Purpose of work: To make and evaluate the quality of Melissa officinalis extracts. Tasks of work: 1. According to the scientific literature to identify an appropriate Balm liquid dosage form according to the pharmacological properties of the active material and the selection of analytical methods for evaluating the quality of products; 2. To set an extraction solvent (ethanol and water) influence on the quality of extracts of Melissa officinalis; 3. To compare extraction method influence on the quality of extracts of Melissa officinalis; 4. To investigate the relationship between the raw material and extraction solvent influence on the quality of extracts of Melissa officinalis. Methods: 1. Object of analysis – extracts of Melissa officinalis; 2. Preparation of an aquous and ethanolic extracts: a) Extracts have been produced by tradicional maceration and percolation methods; b) Ethanol extracts have been produced by extraction by ultrasound. The quality of these extracts has been evaluated after 20, 30, 40 min. 3. Spectrophotometric method (Folin – Ciocalteua method) – common amount of total polyphenolic compounds by p-cumaric acid equivalent has been evaluated; 4. The evaluation of dry residual according to gravimetric analysis has been calculated; 5. Antimicrobial activity by Ph. Eu. 01/2002, 2.6.12 method has been evaluated. Results: By spectrophotometric method it has been evaluated that extrahent has the influence on active compounds emission: higher amount of... [to full text]
4

Analýza senzoricky aktivních látek obsažených v bylinných extraktech / Analysis of sensorially active substances contained herbal extracts

Koloničná, Markéta January 2017 (has links)
The peppermint (Mentha piperita), the salvia (Salvia officinalis), the lemon balm (Melissa oficinalis), the camomile (Matricaria chamomilla) and the valerian (Valeriana officinalis) are herbs with healing effects. Their ethanol extracts are used for food fortification or in a cosmetic industry. Substances contained in herbal extracts were analyzed in this thesis. The extracts were prepared by maceration. Next, they were analyzed by using a gas chromatography and a mass spectrometry. The aim of this thesis was an optimalization of the method used for the analysis of sensorially active substances. Then, herbal extracts were analyzed and concentration of sensorially active substances was determined.
5

Karakterizacija funkcionalnog napitka od melise (Melissa officinalis L.) dobijenog fiziološkom aktivnošću čajne gljive / Characterization of functional lemon balm (Melissa officinalis L.) beverage obtained by physiological activity of tea fungus

Velićanski Aleksandra 28 December 2012 (has links)
<p>Cilj rada je bio ispitivanje funkcionalnih karakteristika kombuha napitka<br />od melise (<em>Melissa officinalis</em> L.). Antibakterijska aktivnost kombuha<br />napitaka optimalne konzumne i većih kiselosti ispitana je prema<br />bakterijama izolovanim iz hrane i vode za piće. Nosilac antimikrobne<br />aktivnosti je sirćetna kiselina, a na ostale nosioce ukazuje delovanje<br />neutralisane kombuhe i čajnog napitka prema nekim test bakterijama.<br />Spektrofotometrijskom metodom određen je sadržaj ukupnih fenolnih<br />jedinjenja, a HPLC analizom određen je kvalitativni i kvantitativni sastav<br />fenolnih jedinjenja u fermentacionim tečnostima, čajnim i kombuha<br />napicima od melise i crnog čaja. Antioksidativna aktivnost istih uzoraka<br />ispitana je na DPPH i OH radikale ESR spektralnom metodom. Uzorci<br />fermentacione tečnosti i kombuha napitka od melise imali su veću<br />antioksidativnu aktivnost prema oba radikala u odnosu na uzorke sa<br />crnim čajem. Konzumna kombuha od melise imala je veću<br />antioksidativnu aktivnost od čajnog napitka. Aktivne komponente<br />kombuha napitka od melise su verovatno ruzmarinska kiselina i<br />kvercetin. U ispitivanju antiproliferativne aktivnosti konzumnog<br />kombuha napitka i čajnog napitka od melise na tri ćelijske linije humanih<br />karcinoma: HeLa (epitelni karcinom grlića materice), MCF-7<br />(adenokarcinom dojke) i HT-29 (adenokarcinom debelog creva) utvrđeno<br />je da nije do&scaron;lo do stimulacije proliferacije ispitanih ćelijskih linija pri<br />koncentracijama većim od 100 &mu;g/ml. Pored istraživanja biolo&scaron;ke<br />aktivnosti ispitana je mogućnost simultane mlečno-kiselinske i kombuha<br />fermentacije. Dodatkom starter kultura i <em>Lactobacillus spp</em>. izolata u<br />fermentacionu tečnost dolazi do povećanja sadržaja L- i D- mlečne<br />kiseline, iako su ćelije bakterija mlečne kiseline, osim izolata iz kiselog<br />testa (<em>L. hilgardii</em>), pokazale malu otpornost na uslove tokom<br />fermentacije i čuvanja pripremljenih napitaka. Izvr&scaron;ena je i identifikacija<br />bakterija sirćetnog vrenja izolovanih iz lokalnih čajnih gljiva PCR<br />metodom. Dva izolata verovatno pripadaju vrsti <em>Gluconobacter oxydans</em>,<br />a treći vrsti <em>Gluconacetobacter hansenii</em>.</p> / <p>The aim of this study was to investigate functional characteristics of akombucha beverage from lemon balm (<em>Melissa officinalis</em> L.) tea. Antibacterial activity of kombucha beverages with optimum and higheracidities was tested against bacteria isolated from food and drinking water. The main active component of antibacterial activity was acetic acid, while slight activity of neutralized kombucha and unfermented tea against some test bacteria indicated presence of other antibacterial components. Total phenol concentration in unfermented tea samples, fermentation broths and kombucha beverages from lemon balm and black tea was determined spectrophotometrically whereas qualitative and quantitative concentration of polyphenolic compounds was determined by HPLC method. Antioxidant activity on DPPH and hydroxyl radical in the same samples was determined on an ESR spectrometer. Fermentation broth and kombucha beverage from lemon balm had higher antioxidant activity against both radicals than the samples from black tea. Kombucha beverage from lemon balm with optimum acidity had higher antioxidant activity than unfermented lemon balm tea. The main active components of antioxidant activity were probably rosmarinic acid and quercetin. Antiproliferative activity of lemon balm tea and kombucha was measured by sulforhodamine B colorimetric assay on HeLa (cervix epitheloid carcinoma), HT-29 (colon adenocarcinoma), and MCF-7 (breast adenocarcinoma) cell lines. By applying concentrations higher than 100 &mu;g/ml, tested samples did not stimulate proliferation of cell lines. The possibility of simultaneous lactic acid and kombucha fermentation was tested as well. When starter cultures and Lactobacillus spp. isolates were applied, the content of Land D- lactic acid increased during fermentation, although lactic acid bacteria (except <em>L. hilgardii</em> isolated from sour dough) showed low resistance to the conditions during fermentation and beverages storage. Acetic acid bacteria isolated from local tea fungus were identified by PCR method. Two isolates might be <em>Gluconobacter oxydans</em> and one - <em>Gluconacetobacter hansenii.</em></p>
6

Avaliação da atividade antimicrobiana do óleo essencial de distintos quimiotipos de Lippia alba (Mill.) N.E.Brown

Formolo, Fernanda 15 December 2009 (has links)
Lippia alba é uma espécie nativa, conhecida como erva cidreira , utilizada na medicina popular para o tratamento de distintas afecções. Estudos farmacológicos atribuem a sua atividade antimicrobiana aos terpenóides presentes no óleo essencial. Considerando a variação na composição de óleos essenciais de L. alba, o presente trabalho teve por objetivo determinar a composição química do óleo essencial de sete acessos de L. alba coletados no sul do Brasil, e avaliar a atividade antimicrobiana dos mesmos sobre um painel de 22 espécies bacterianas e 9 espécies de leveduras. Os óleos essenciais foram extraídos por hidrodestilação e analisados por Cromatografia gasosa e Cromatografia gasosa acoplada a um detector seletivo de massas. A atividade antimicrobiana (Dose de inibição 50% e Concentração inibitória mínima) foi determinada através do método de diluição seriada (0 a 10 mg/ml) em microplacas, com avaliação do crescimento por absorbância a 595nm. Para a determinação de Dose de inibição 50% e Concentração inibitória mínima foram consideradas as concentrações de óleo essencial que reduzidam o crescimento em 50% e 90%, respectivamente. A atividade bactericida e bacteriostática foi deteminada após 3h de tratamento dos microrganismos com a Concentração inibitória mínima pré-determinada para cada óleo. Com base nos seus componentes majoritários, os resultados permitiram caracterizar os sete acessos de L. alba como pertencentes aos quimiotipos: citral, 1,8-cineol/cânfora, linalol, linalol/mirceno/cânfora, carvona/cariofileno, linalol/1,8-cineol/germacreno D, e limoneno. Entre os quimiotipos, o óleo essencial citral exibiu o espectro antimicrobiano mais amplo, inibindo tanto bactérias como leveduras. Óleos com alta concentração de carvona/cariofileno e limoneno foram particularmente eficientes sobre leveduras, enquanto os quimiotipos linalol e linalol/1,8-cineol/germacreno D exibiram atividade inibitória sobre várias bactérias Gram positivas e negativas. Na Concentração inibitória mínima, o quimiotipo citral mostrou ação bactericida sobre leveduras e Salmonella sp. Entretanto, outros óleos apresentaram apenas efeito bacteriostático sobre a maioria dos microrganismos avaliados. Em geral, nossos resultados confirmam a atividade dos óleos essenciais de L. alba sobre microrganismos de importância clínica e industrial, mas apontam a necessidade de avaliação adequada da composição dos mesmos afim de escolher aquele mais efetivo para o controle de um microrganismo específico. / Submitted by Marcelo Teixeira (mvteixeira@ucs.br) on 2014-06-04T18:06:34Z No. of bitstreams: 1 Dissertacao Fernanda Formolo.pdf: 1268224 bytes, checksum: 2cde3df8d5929f9192359c2c9beb98df (MD5) / Made available in DSpace on 2014-06-04T18:06:34Z (GMT). No. of bitstreams: 1 Dissertacao Fernanda Formolo.pdf: 1268224 bytes, checksum: 2cde3df8d5929f9192359c2c9beb98df (MD5) / Lippia alba is a native species, known as "erva cidreira", currently used in folk medicine for the treatment of several diseases. Pharmacologic studies attributed their antimicrobial activity to the terpenoids present in the essential oils. Considering the variation on essential oil composition among L. alba accessions, the present work aimed to determine the essential oil composition of seven accession of L. alba collected in South Brazil, and to evaluate their antimicrobial activity against a panel of 22 bacterial and 9 yeast species. Essential oils were extracted by hydrodistillation and analyzed by GC and GC/MS. Antimicrobial activity (ID50 and MIC) were determined by a serial dilution method (0 to 10 mg/ml) on microplates with growth evaluation by absorbance at 595nm. For ID50 and MIC determination were considered the essential oil concentrations that reduced microbial growth on 50% and 90%, respectively. Bactericidal and bacteriostatic activities were determined after 3h treatment of the microorganisms with their individual MIC of each essential oil. Based on their main constituents, the results allowed characterizing the seven accessions of L. alba as chemotypes: citral, 1,8-cineol/camphor, linalool, linalool/mircene/camphor, carvone/caryophyllene, linalool/1,8-cineol/germacrene D, and limonene. Among these chemotypes, citral essential oils showed the largest antimicrobial spectrum, inhibiting both bacteria and yeasts. Oils with high concentration of carvone/caryophyllene, and limonene, were particularly effective against yeasts, and oils from chemotypes linalool and linalool/1,8-cineol/germacrene D exhibited inhibitory activity against several Gram positive and negative bacteria. At the MIC, citral showed bactericide effect on yeasts and Salmolella. However, other oils showed just bacteriostatic effects on most microorganisms. In general, our results confirm the activity of L. alba essential oils on both clinical and industrial microorganisms, but point out the necessity to properly evaluate essential oil composition to choose those more effective for the control of a specific microorganism.
7

Avaliação da atividade antimicrobiana do óleo essencial de distintos quimiotipos de Lippia alba (Mill.) N.E.Brown

Formolo, Fernanda 15 December 2009 (has links)
Lippia alba é uma espécie nativa, conhecida como erva cidreira , utilizada na medicina popular para o tratamento de distintas afecções. Estudos farmacológicos atribuem a sua atividade antimicrobiana aos terpenóides presentes no óleo essencial. Considerando a variação na composição de óleos essenciais de L. alba, o presente trabalho teve por objetivo determinar a composição química do óleo essencial de sete acessos de L. alba coletados no sul do Brasil, e avaliar a atividade antimicrobiana dos mesmos sobre um painel de 22 espécies bacterianas e 9 espécies de leveduras. Os óleos essenciais foram extraídos por hidrodestilação e analisados por Cromatografia gasosa e Cromatografia gasosa acoplada a um detector seletivo de massas. A atividade antimicrobiana (Dose de inibição 50% e Concentração inibitória mínima) foi determinada através do método de diluição seriada (0 a 10 mg/ml) em microplacas, com avaliação do crescimento por absorbância a 595nm. Para a determinação de Dose de inibição 50% e Concentração inibitória mínima foram consideradas as concentrações de óleo essencial que reduzidam o crescimento em 50% e 90%, respectivamente. A atividade bactericida e bacteriostática foi deteminada após 3h de tratamento dos microrganismos com a Concentração inibitória mínima pré-determinada para cada óleo. Com base nos seus componentes majoritários, os resultados permitiram caracterizar os sete acessos de L. alba como pertencentes aos quimiotipos: citral, 1,8-cineol/cânfora, linalol, linalol/mirceno/cânfora, carvona/cariofileno, linalol/1,8-cineol/germacreno D, e limoneno. Entre os quimiotipos, o óleo essencial citral exibiu o espectro antimicrobiano mais amplo, inibindo tanto bactérias como leveduras. Óleos com alta concentração de carvona/cariofileno e limoneno foram particularmente eficientes sobre leveduras, enquanto os quimiotipos linalol e linalol/1,8-cineol/germacreno D exibiram atividade inibitória sobre várias bactérias Gram positivas e negativas. Na Concentração inibitória mínima, o quimiotipo citral mostrou ação bactericida sobre leveduras e Salmonella sp. Entretanto, outros óleos apresentaram apenas efeito bacteriostático sobre a maioria dos microrganismos avaliados. Em geral, nossos resultados confirmam a atividade dos óleos essenciais de L. alba sobre microrganismos de importância clínica e industrial, mas apontam a necessidade de avaliação adequada da composição dos mesmos afim de escolher aquele mais efetivo para o controle de um microrganismo específico. / Lippia alba is a native species, known as "erva cidreira", currently used in folk medicine for the treatment of several diseases. Pharmacologic studies attributed their antimicrobial activity to the terpenoids present in the essential oils. Considering the variation on essential oil composition among L. alba accessions, the present work aimed to determine the essential oil composition of seven accession of L. alba collected in South Brazil, and to evaluate their antimicrobial activity against a panel of 22 bacterial and 9 yeast species. Essential oils were extracted by hydrodistillation and analyzed by GC and GC/MS. Antimicrobial activity (ID50 and MIC) were determined by a serial dilution method (0 to 10 mg/ml) on microplates with growth evaluation by absorbance at 595nm. For ID50 and MIC determination were considered the essential oil concentrations that reduced microbial growth on 50% and 90%, respectively. Bactericidal and bacteriostatic activities were determined after 3h treatment of the microorganisms with their individual MIC of each essential oil. Based on their main constituents, the results allowed characterizing the seven accessions of L. alba as chemotypes: citral, 1,8-cineol/camphor, linalool, linalool/mircene/camphor, carvone/caryophyllene, linalool/1,8-cineol/germacrene D, and limonene. Among these chemotypes, citral essential oils showed the largest antimicrobial spectrum, inhibiting both bacteria and yeasts. Oils with high concentration of carvone/caryophyllene, and limonene, were particularly effective against yeasts, and oils from chemotypes linalool and linalool/1,8-cineol/germacrene D exhibited inhibitory activity against several Gram positive and negative bacteria. At the MIC, citral showed bactericide effect on yeasts and Salmolella. However, other oils showed just bacteriostatic effects on most microorganisms. In general, our results confirm the activity of L. alba essential oils on both clinical and industrial microorganisms, but point out the necessity to properly evaluate essential oil composition to choose those more effective for the control of a specific microorganism.
8

Influência da idade da planta na composição química do óleo essencial de Lippia alba e de um ciclo de seleção recorrente na atividade formicida / Influence of plant age on the chemical composition of the essential oil of Lippia alba and of a recurrent selection cycle on formicidal activity

Pinto, Vanderson dos Santos 31 July 2017 (has links)
Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / Brazilian lemon balm (Lippiaalba (Mill.) N. E. Brown) is a medicinal and aromatic species widely used to fight diseases. Its essential oil, rich in carvone, has insecticidal activity on pests of agricultural interest. Cutting ants cause severe economic damage to forest and horticultural species and hinder cultivation worldwide. Plant aging is one of the main factors that alter the biological activity of essential oils. The objective of this work was to evaluate the influence of plant age on the essential oil of L. alba accessionsand of a recurrent selection cycle onformicidal activity. The experiments were carried out at the Experimental Farm - Campus Rural UFS.The experiment consisted of a randomized blocks design with three replications. For the first experiment, 18 L. albaaccessions were used at two plant ages: one-year-old plants (February2006), and ten-year-old plants (February 2016). In the second experiment, a recurrent selection cycle was carried out with three accessions of the limonene/carvonechemotype. For the progeny competition experiment, three parent genotypes and 11 progenies were taken to the field. In the first experiment, plant age influenced the essential oil production and the chemical composition.The highest essential oil content increase was observed for accessions LA-41 (0.69-2.48%) and LA-53 (0.76-2.84%). The compounds with the greatest variation in the second harvest were p-cymene (0.00-5.12%), limonene (0.00-11.08%), and elemol (0.00-10.54%), because of plant aging. In the second experiment, the highest dry weight of aerial part was observed for parental LA-56 (57.54 g plant-1). The essential oil content was higher in the progeny LA-57-10 (2.844%) and the parental LA-57 (2.664%). Carvone concentration was higher for LA-57 (59.02%), with a significant difference when compared with the evaluated progenies. Among the progenies, the highest carvone concentration was observed for LA-56-04 (57.78%) and the lowest for LA-57-01 (17.71%) and LA-57-02 (17.27%).One recurrent selection cycle resulted in increased formicidal activity of some progenies. Higher mortility of Acromyrmex balsani was caused by the essential oils of the progenies LA-56-04 and LA-70-03. / A erva-cidreira-brasileira [Lippia alba (Mill.) N. E. Brown] é uma espécie medicinal e aromática que apresenta vários quimiotipos. O óleo essencial rico em carvona possui atividade inseticida sobre pragas de interesse agrícola. Diante disso, o objetivo do trabalho foi avaliar a influência da idade da planta nos óleos essenciais de acessos de L. alba e de um ciclo de seleção recorrente na atividade formicida. Os ensaios foram conduzidos na Fazenda Experimental “Campus Rural da UFS”. Para o primeiro ensaio foram testados 18 acessos de L. alba, que foram colhidos quando as plantas estavam com um ano de idade (fevereiro/2006) e dez anos (fevereiro/2016). No segundo experimento foi realizado um ciclo de seleção recorrente com três acessos com alto teor de carvona no seu óleo essencial. Para o ensaio de competição de progênies foi implantado um ensaio testando 11 progênies e os três parentais. A idade da planta influenciou na produção e composição química dos óleos essenciais dos acessos de L. alba testados. Observou-se maior aumento doteor de óleo essencial para os acessos LA-41 (0,69-2,48%) e LA-53 (0,76-2,84%). Com o envelhecimento das plantas notou-se maior variação nos óleos essenciais para os compostos p-cimeno (0,00-5,12%), limoneno (0,00-11,08%) e elemol (0,00-10,54%). No segundo experimento a maior produção de massa seca da parte aérea foi observada para o genótipo LA-56 (57,54 g planta-1). O teor de óleo essencial foi superior na progênie LA-57-10 (2,844%) e o parental LA-57 (2,644%). A carvona foi superior para o LA-57 (59,02%) com diferença significativa em comparação as progenies avaliadas. Entre as progênies, o maior teor foi observado para a progênie LA-56-04 (57,78%) e o menor para o LA-57-01 (17,71%) e LA-57-02 (17,27%). Um ciclo de seleção recorrente resultou no aumento da atividade formicida de algumas progênies.Maior mortalidade de Acromyrmex balsani foi causada pelos essenciais das progênies LA-56-04 e LA-70-03. / São Cristóvão, SE
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Aromaticky aktivní látky vybraných druhů bylin / Aroma active compounds of selected types of herbs

Škutová, Pavla January 2018 (has links)
This diploma thesis deals with the identification of aroma active compounds in medicinal herbs. The group consists of 5 types of herbs: lemon balm (Melissa officinalis), pot marigold (Calendula officinalis), clary sage (Salvia sclarea), milk thistle (Silybum marianum), goat’s rue (Galega officinalis). These plants are known for their positive effects in folk medicine. The SPME-GC-MS method was chosen to characterize the fragrances. During the identification of volatile compounds, emphasis was put on suspected fragrance allergens listed in EC Regulation 1223/2009 in Annex III. Overall 106 compounds were identified together with 8 allergens in lemon balm, pot marigold contained 104 compounds with 7 allergens included, 82 compounds including 5 allergens in clary sage, 73 compounds were identified in milk thistle including 6 allergens and 110 compounds with 9 allergens included in goat’s rue.

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