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Tesi sul tema "Antifungal metabolites"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Cecotti, Roberto. "Antifungal secondary metabolites from some Indian Labiatae." Thesis, University of Strathclyde, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248262.

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2

Woods, Caroline M. "The fungal ecology of Sitka spruce stumps." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU083296.

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A study of the fungal ecology of <I>Picea sitchensis </I>stumps on mineral soils on first rotation sites in Scotland was carried out to determine fungal colonization, succession and the mechanisms of fungal interaction. Fungal and bacterial colonization of stump and buttress roots of stumps 0, 7, 28 days, 12, 16 and 48/53 months old was assessed. <I>Melanotus proteus </I>was found in all 12 month old stumps; <I>Sistotrema brinkmanni</I> was recorded most frequently in 16 and 48/53 month old stumps. A series of <I>in vitro </I>experiments was carried out to identify interactions occurring betwe

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3

McEwan, Michael. "The antifungal effects of plant essential oils and their production by transformed shoot culture." Thesis, University of Strathclyde, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246327.

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4

Boonlarppradab, Chollaratt. "Investigation of the potential anticancer and antifungal active secondary metabolites from marine natural products." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3274752.

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Thesis (Ph. D.)--University of California, San Diego, 2007.<br>Title from first page of PDF file (viewed October 5, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.

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5

ZANNINI, EMANUELE. "Sourdough lactic acid bacteria: biopreservation of bakery products by the production of antifungal metabolites." Doctoral thesis, Università Politecnica delle Marche, 2007. http://hdl.handle.net/11566/242584.

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6

Constabel, Carsten Peter. "Studies on thiarubrine, a naturally occurring disulfide polyine." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27861.

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Chemical and biological aspects of thiarubrine, a highly antifungal dithiacyclohexadiene polyine, were investigated. A tissue culture system for the production of thiarubrines was developed by culturing hairy roots of Chaenactis douglasii induced by Agrobacterium rhizogenes strain TR7. One culture line accumulated two times the levels of thiarubrines of nontransformed control root cultures, while maintaining rapid growth. The combination of fast growth and high thiarubrine accumulation could not be duplicated in controls by adding exogenous NAA to the culture medium. Hairy root cultures also p

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7

Sjögren, Jörgen. "Bioassay-guided isolation and characterisation of antifungal metabolites : studies of lactic acid bacteria and propionic acid bacteria /." Uppsala : Dept. of Chemistry, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200517.pdf.

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8

Egan, Suhelen Microbiology &amp Immunology UNSW. "Production and regulation of fouling inhibitory compounds by the marine bacterium Pseudoalteromonas tunicata." Awarded by:University of New South Wales. Microbiology and Immunology, 2001. http://handle.unsw.edu.au/1959.4/17838.

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The marine surface-associated bacterium Pseudoaltermonas tunicata, produces a range of compounds that inhibit fouling organisms, including invertebrate larvae, bacteria, algal spores and fungi. In addition to these antifouling compounds P. tunicata cells produce both a yellow and a purple pigment. The aim of this study was to further characterise the antifouling activities, their regulation and relationship with pigmentation, and the ecological significance of P. tunicata and related organisms. It was discovered that the anti-algal compound was extracellular, heat sensitive, polar and betwe

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9

Bahi, Muhammad [Verfasser], Hartmut [Akademischer Betreuer] Laatsch, and Axel [Akademischer Betreuer] Zeeck. "Bandamycin as New Antifungal Agent and further Secondary Metabolites from Terrestrial and Marine Microorganisms / Muhammad Bahi. Gutachter: Hartmut Laatsch ; Axel Zeeck. Betreuer: Hartmut Laatsch." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1043991387/34.

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10

Mesguida, Ouiza. "Biocontrôle d’un champignon pathogène, Fomitiporia mediterranea, impliqué dans l'Esca, une maladie dévastatrice du bois de la vigne, en utilisant des bactéries isolées de Vitis vinifera." Electronic Thesis or Diss., Pau, 2024. http://www.theses.fr/2024PAUU3054.

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Les maladies du bois de la vigne (MDBs), notamment l'Esca, constituent un enjeu majeur pour la viticulture mondiale. Ces MDBs réduisent la durée de vie des vignobles, impactent la qualité des raisins et donc du vin, entraînant des pertes de revenus estimées à un milliard d'euros par an en France. Aucun traitement curatif n'est disponible depuis l'interdiction de l'arsénite de sodium au début des années 2000, le dernier pesticide chimique homologué pour contrôler les MDBs en Europe. Le développement de méthodes alternatives pour gérer les MDBs, telles que le biocontrôle, est par conséquent de l

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11

Teixeira, Ana Frazão. "Metabólitos secundários de frutos da Virola molissima (Poepp. ex A. DC.) Warb.: neolignanas e atividade antifúngica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-19102007-092413/.

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O uso de plantas na cura de enfermidades tem sido objeto de muitos estudos e desde épocas remotas está ligado ao desenvolvimento cultural de civilizações. Estudos anteriores em espécies de Myristicaceae descrevem a ocorrência da classe de lignóides como principal metabólito secundário. Variedades de estruturas químicas e de atividades biológicas são atribuídas aos lignóides. Estes metabólitos encontram-se acumulados em todas as partes da planta, principalmente nos frutos, onde os compostos predominantes são neolignanas. O presente trabalho foi realizado com Virola molissima que

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12

Oliveira, Ariana Reis Messias Fernandes de. "Morfoanatomia, composi??o qu?mica e atividade biol?gica do ?leo essencial de esp?cies nativas de Lippia." Universidade Estadual de Feira de Santana, 2014. http://localhost:8080/tede/handle/tede/219.

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Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2015-10-02T00:07:17Z No. of bitstreams: 1 tese_ariana_reis_17_12_2014.pdf: 4645024 bytes, checksum: bcc726ad75f2d5883fb9e1118b2a9d3d (MD5)<br>Made available in DSpace on 2015-10-02T00:07:17Z (GMT). No. of bitstreams: 1 tese_ariana_reis_17_12_2014.pdf: 4645024 bytes, checksum: bcc726ad75f2d5883fb9e1118b2a9d3d (MD5) Previous issue date: 2014-12-17<br>The aim of this study was to characterize the morphology, production, content, chemical composition and bioactive activity of essential oils of Lippia bromleyana, Lippia l

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13

Siskos, Alexandros P. "The biosynthesis of Soraphen A." Thesis, King's College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326242.

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14

Pham, Giang Nam. "Développement de nouveaux antibiotiques dirigés contre des bactéries multirésistantes à partir de microorganismes marins inexploités." Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5028.

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Abstract (sommario):

La vaste diversité biologique et chimique dans l'environnement marin en fait une ressource précieuse pour la découverte de nouveaux antibiotiques, en réponse à l'émergence de la crise des antibiotiques à l'échelle mondiale. Cependant, le taux de découverte de nouveaux médicaments d'origine marine semble insuffisant par rapport à son potentiel. Dans un effort pour contribuer à la recherche de composés prometteurs pour le développement de nouveaux antibiotiques, nous avons étudié les métabolites secondaires et l'activité biologique de quatre souches de champignons : Fusarium equiseti, Anthracocy

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15

Bach, Evelise. "Utilização de Burkholderia sp. 89 para o controle biológico de fungos fitopatogênicos e identificação de moléculas de seu metabolismo secundário envolvidas nesse processo." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/150647.

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O uso de bactérias promotoras de crescimento vegetal ou agentes de biocontrole como inoculantes agrícolas é uma alternativa importante e ecologicamente correta, com grandes benefícios na agricultura para substituir, ou ao menos suplementar, a excessiva utilização de fertilizantes e pesticidas. Neste trabalho avaliamos a capacidade de biocontrole e de competência rizosférica de três bactérias com características de promoção de crescimento vegetal (Plant growth promoting - PGP): Bacillus mycoides B38V, Paenibacillus riograndensis SBR5 e Burkholderia sp. 89. As três bactérias avaliadas apresentar

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16

Xu, Xiao-Jin. "Studies on antifungal and antitumor fungal metabolites : isolation, characterization and applications." Thesis, 1993. http://spectrum.library.concordia.ca/4338/1/MM90896.pdf.

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17

"Phytoalexins and other antifungal metabolites from crucifers: isolation, synthesis and biosynthesis." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-04-1018.

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Phytoalexins and phytoanticipins are antimicrobial natural products involved in plant defence pathways against plant pathogens and other stresses. Most cruciferous phytoalexins are indole containing compounds with various side chains (dithiocarbamates, isothiocyanate, isonitrile, acetonitriles etc.). Many phytoanticipins of crucifers are glucosinolates and their metabolites, which have diverse structures and precursors, including aliphatic, phenyl or indolyl containing amino acids. Indole glucosinolates are derived from tryptophan, which is also a biosynthetic precursor to cruciferous phytoale

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18

Tsai, Yi-Chen, and 蔡依真. "Screening antagonistic Streptomyces and antifungal metabolites analysis of Streptomyces sp. A272." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/56190156798854991220.

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碩士<br>國立中興大學<br>植物病理學系所<br>97<br>Actinomycetes are widely distributed gram-positive filamentous bacteria with varied morphology. The genus Streptomyces is the main group among actinomycetes. Many reports indicate that Streptomyces can protect crops from pathogens and promote plant growth with multiple biocontrol mechanisms. The characters of numerous seconday metabolites biosynthesis, including enzymes and antibiotics, have been in commercial use in medicine, animal feeder additives, insecticides, and plant protection. This study was aimed to screen for antagonistic actinomycete strains with p

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19

Bahi, Muhammad. "Bandamycin as New Antifungal Agent and further Secondary Metabolites from Terrestrial and Marine Microorganisms." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-000D-F047-B.

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20

Grochowski, Laura L. "Molecular genetics and enzymology of secondary metabolite biosynthesis. I, Isolation of natural product biosynthesis gene clusters from symbiotic marine organisms. II, Enzymology of blasticidin S biosynthesis." Thesis, 2004. http://hdl.handle.net/1957/29916.

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Molecular genetic and enzymological techniques have been employed to study secondary metabolite biosynthesis. These investigations have focused on two projects: the cloning and heterologous expression of biosynthetic gene clusters from unculturable marine organisms and the characterization of individual enzymes involved in the biosynthesis of the antifungal agent blasticidin S. The marine environment is proving to be a valuable source of biologically active compounds, but problems associated with sustainable harvest, laboratory culture, and organic synthesis make obtaining sufficient quantitie

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21

Shih, Hui-Nung, and 施惠儂. "Fungicides screening from the Trichoderma secondary metabolites and antifungal potency of the organic ethoxy ether functionalized imidazolium salts." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/62544144635815422578.

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碩士<br>國立東華大學<br>生命科學系<br>99<br>Secondary metabolites play a pivotal role in the antagonistic activities of some biocontrol species of Trichoderma resulting in the suppression of plant pathogens. T. koningii RIS 3-8, among other 22 strains, was the best Trichoderma spp. tested against phytopathogens, Fusarium solani, F. oxysporum, Rhizoctonia solani and Botrytis cinerea in vitro. Removing proteins by heat-treatment and protease-treatment showed proteins had no role in the antagonistic tests that lead to the secondary metabolites be the primary candidates. To discern the determinants of the T. k

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22

Harm, Gregory F. "Foliar hyperparasites of rust fungi and the genome mining of novel secondary metabolites." Thesis, 2019. http://hdl.handle.net/1959.7/uws:53790.

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Rust diseases caused by Puccinia spp. on cereal crops, such as wheat, can cause catastrophic crop losses across the globe, and have been identified as a threat to global food security. Given the prevalence, evolution and impact of rust diseases, there is a push to identify additional control methods. Hyperparasites (parasites of parasites) are a potential biological control method for rust fungi. Fungal hyperparasites also produce a variety of novel secondary metabolites (SMs), some of which are potent antifungals. SMs are produced by biosynthetic gene clusters (BGCs), and these clusters can b

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23

Silva, Joana Margarida Agarez Monteiro Cerca da. "Metabolitos secundários das macroalgas castanhas de elevado potencial para a indústria farmacêutica." Master's thesis, 2021. http://hdl.handle.net/10284/9642.

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Nos últimos anos, a procura por novos compostos para utilização pela indústria farmacêutica conduziu a um aumento dos estudos com espécies marinhas, uma vez que a sua aplicabilidade para fins terapêuticos é conhecida por parte de comunidades costeiras desde tempos remotos. O ambiente marinho tem evidenciado uma grande biodiversidade de espécies que demonstraram possuir a capacidade de sintetizar vários compostos com elevado potencial farmacológico. Assim, a indústria farmacêutica tem investido na extração, identificação e estudos de várias moléculas que constituem metabolitos de es

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24

Elazreg, Karima. "Endophytes of commercial Cranberry cultivars that control fungal pathogens." Thesis, 2020. http://hdl.handle.net/1866/24726.

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Les endophytes sont des microorganismes (généralement des bactéries et des champignons) qui vivent dans les tissus végétaux mais n'activent pas le système immunitaire/défense des plantes, contrairement aux pathogènes végétaux qui activent généralement les réponses immunitaires des plantes. Des recherches récentes ont montré que pratiquement toutes les plantes cultivées en plein champ contiennent un certain nombre d'endophytes, et que certains endophytes stimulent la croissance des plantes et renforcent la résistance contre les agents pathogènes. Les endophytes sécrètent des composés chimiques

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25

Shih, Hsin-Der, and 石信德. "Control of Crop Diseases with Streptomyces padanus PMS-702 and Identification of Fungichromin as Its Major Antifungal Metabolite Related to Suppress Plant Pathogens." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/16284521265539229273.

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博士<br>國立中興大學<br>植物病理學系<br>91<br>More than 200 strains of Actinomycetes were isolated from farmland soils and agriculture wastes in Taiwan. Among those, 98% of the strains were identified as Streptomyces spp. The other 2 % strains belonged to the genus Actinomadura, Herbidospora, Microbispora, and Streptosporangium. Thirty isolates of plant fungal pathogens and nine strains of plant bacterial pathogens were used to bioassay the antagonistic ability of Streptomyces sp. PMS-702 on potato dextrose agar plates. Acremonium diospyri, A. lactucum, Alternaria brassicicola, Athelia rolfsii (Sclerotium r

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26

Koudelková, Barbora. "Vliv sekundárních metabolitů (esenciálních olejů) na endofytické houby kolonizující listy Rhododendron tomentosum." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-332386.

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Rhododendron tomentosum is an evergreen shrub with a high content of secondary metabolites, particularly essential oils with antimicrobial effects. Diversity of endophytic fungi in this species and their possible adaptation to growth in the essential oil environment is not much explored. Therefore, the first aim of this thesis was to reveal the diversity of endophytic fungi colonising leaves of R. tomentosum on seven localities in the Czech Republic and one in Estonia. I isolated and determined (using comparison of ITS1 and ITS2 rDNA with the sequences from GenBank and morphological signs) 37

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