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You searched for subject:(Green biocides). Showing records 1 – 2 of 2 total matches.

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1. Sfecci, Estelle. Valorisation de biocides d’invertébrés marins méditerranéens : Secondary metabolites from Mediterranean marine invertebrates.

Degree: Docteur es, Chimie, 2018, Côte d'Azur

Ces travaux de thèse portent sur l’étude chimique d’espèces marines échantillonnées en Méditerranée. Dans le cadre du projet VALBIM, co-financé par la région PACA et en étroite collaboration avec la société BioPreserv à Grasse mais également avec la Mycoteca Universitatis Taurinensis (MUT) de l’Université de Turin, nous avons isolé et caractérisé 21 molécules dont 14 se sont avérées nouvelles. L’étude de l’algue Caulerpa taxifolia a conduit à la caulerpényne et à quatre nouveaux dérivés de l’acide pyruvique sulfatés. Les travaux sur l’ascidie Polysyncraton sp. ont conduit aux bolascidines A-D, quatre nouveaux métabolites de type bolaamphiphiles dont il n’existe pas à notre connaissance d’équivalent naturel ou synthétique. La première étude chimique de l’éponge Hexadella racovitzai a conduit à deux dérivés de la bromotyrosine, la psammapline A et une nouvelle molécule, la 4-Osulfatocyclobispsammapline A. Par ailleurs, trois nouvelles crambescines C1, conjointement avec une crambescine A2 déjà répertoriée, ont été isolées de Crambe crambe. L’étude du champignon marin Stachybotrys chartarum, isolé de l’éponge Aplysina cavernicola, a conduit à la satratoxine H et à deux nouveau dérivé, la 2,3-dihydrosatratoxine H et l’épi-chartarutine G, ainsi qu’à trois dérivés stachybotrylactame déjà répertoriés dans la bibliographie. Les différents métabolites ont été évalués pour leurs propriétés antibactériennes et cytotoxiques. Ces travaux ont bénéficié de nouvelles approches analytiques (calculs des spectres de dichroïsme circulaire électroniques par TDDFT, réseaux moléculaires) permettant de renforcer l’intérêt des études liées à l’écologie chimique et à la recherche de nouvelles molécules bioactives potentiellement valorisables dans différents domaines.

This PhD work focuses on the chemical study of marine species sampled in the Mediterranean Sea. As part of the VALBIM project, cofinanced by the region PACA and in close collaboration with the SME BioPreserv in Grasse but also with the Mycoteca Universitatis Taurinensis (MUT) of the University of Turin, we have isolated and characterized 21 molecules in total.14 of them were never reported before. The study of the seaweed Caulerpa taxifolia led to caulerpenyne and four new sulphated pyruvic acid derivatives. The work on the ascidian Polysyncraton sp. led to bolascidins A-D, four new metabolites which belong to the bolaamphiphile family, which, to the best of our knowledge, have no natural or synthetic equivalent. The first chemical study of the sponge Hexadella racovitzai led to two bromotyrosine derivatives, psammapline A and a new molecule, 4-O-sulfatocyclobispsammapline A. In addition, three new C1 crambescins, together with one crambescine A2 already reported, have been isolated from Crambe crambe. For all isolated marine invertebrate metabolites, the producer(s) remain(s) to be explored. The study of the marine fungus Stachybotrys chartarum, isolated from the sponge Aplysina cavernicola, led to satratoxin H and three stachybotrylactam derivatives already reported in the…

Advisors/Committee Members: Mehiri, Mohamed (thesis director).

Subjects/Keywords: Produits naturels marins; Méditerranée; Invertébrés marins; Macroalgue verte; Champignons marins; Métabolites spécialisés; Isolement; Acide pyruvique; Bolaamphiphiles; Alcaloïdes; Bromotyrosines; Biocides; Marine natural products; Mediterranean; Marine invertebrates; Green macroalgae; Marine fungi; Secondary metabolites; Isolation; Pyruvic acid; Bolaamphiphiles; Alkaloids; Bromotyrosines; Biocides

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sfecci, E. (2018). Valorisation de biocides d’invertébrés marins méditerranéens : Secondary metabolites from Mediterranean marine invertebrates. (Doctoral Dissertation). Côte d'Azur. Retrieved from http://www.theses.fr/2018AZUR4039

Chicago Manual of Style (16th Edition):

Sfecci, Estelle. “Valorisation de biocides d’invertébrés marins méditerranéens : Secondary metabolites from Mediterranean marine invertebrates.” 2018. Doctoral Dissertation, Côte d'Azur. Accessed April 02, 2020. http://www.theses.fr/2018AZUR4039.

MLA Handbook (7th Edition):

Sfecci, Estelle. “Valorisation de biocides d’invertébrés marins méditerranéens : Secondary metabolites from Mediterranean marine invertebrates.” 2018. Web. 02 Apr 2020.

Vancouver:

Sfecci E. Valorisation de biocides d’invertébrés marins méditerranéens : Secondary metabolites from Mediterranean marine invertebrates. [Internet] [Doctoral dissertation]. Côte d'Azur; 2018. [cited 2020 Apr 02]. Available from: http://www.theses.fr/2018AZUR4039.

Council of Science Editors:

Sfecci E. Valorisation de biocides d’invertébrés marins méditerranéens : Secondary metabolites from Mediterranean marine invertebrates. [Doctoral Dissertation]. Côte d'Azur; 2018. Available from: http://www.theses.fr/2018AZUR4039

2. Silva, Mara Teresa Caldeira da. Novel biocides for cultural heritage.

Degree: 2017, Universidade de Évora

Many microorganisms, influenced by environmental conditions, are the main responsible for biological contamination in built heritage. Biocides based on chemical toxic compounds have been the most often used to mitigate this problem. Thus, it is of vital importance to develop proper remediation actions based on environmentally innocuous alternatives. Bacteria of the genera Bacillus are emerging as an optimistic alternative due to their capacity to produce secondary metabolites with antagonistic activities against many fungal pathogens. This work aimed to develop ground-breaking research in the area of cultural and built heritage rehabilitation, by the development of natural and green safe biocides for biodegradation/biodeterioration treatment of Cultural Heritage. A complementary methodology, including antifungal tests and molecular approaches was used, in combination with microscopic and analytical techniques to detect, characterise and study the efficiency of the biological active compounds produced by Bacillus sp. strains. Flow cytometry allowed a comprehensive study of the physiological mechanism behind the bioactive compounds production in order to understand and improve the strategic approaches for process optimisation and scale up production. Moreover, according to the results of the toxicological tests, these compounds have proven to be a real environmental safe and innocuous alternative to the chemical biocides commonly used during the conservative interventions. Thus, they have shown a great potential for their future application in cultural and built heritage rehabilitation; Novos Biocidas para o Património Cultural Resumo: Vários microrganismos influenciados pelas condições ambientais são os principais responsáveis pela contaminação biológica do património cultural edificado. Na tentativa de mitigação destes agentes, compostos geralmente tóxicos têm sido os mais utilizados. Assim, é de enorme importância desenvolver ações de remediação dirigidas aos agentes efetivamente biodeteriogénicos, baseados em alternativas inócuas para o meio ambiente. As bactérias do género Bacillus surgem, como uma viável alternativa devido à capacidade de produzir metabolitos secundários com atividade antagonista, contra diversos fungos. Este trabalho teve como objetivo desenvolver uma investigação inovadora que possa vir a ser útil na área de reabilitação do património cultural edificado, através da produção de novos biocidas naturais e mais ecológicos. Utilizou-se uma abordagem metodológica, que incluiu testes antifúngicos e abordagens moleculares, combinadas com técnicas microscópicas e analíticas, de forma a detetar, caracterizar e estudar a eficiência de compostos biologicamente ativos produzidos por estripes de Bacillus sp.. Foram ainda utilizados os mecanismos fisiológicos por detrás da produção destes compostos, de forma a perceber e melhorar as abordagens estratégicas no processo de otimização da produção. Em testes toxicológicos, compostos produzidos por estirpes de Bacillus sp. selecionados, provaram ser uma… Advisors/Committee Members: Caldeira, Ana Teresa, Candeias, António, Teixeira, Dora.

Subjects/Keywords: Biodegradation/Biodeterioration; Bacillus sp.; Bioactive compounds; Lipopeptides; Iturin; Antifungal activity; Sporulation; Green biocides; Cultural heritage rehabilitation; Biodegradação/Biodeterioração; Bacillus sp.; Compostos bioativos; Lipopéptidos; Iturina; Atividade antifúngica; Esporulação; Biocidas ecológicos; Reabilitação do património histórico

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Silva, M. T. C. d. (2017). Novel biocides for cultural heritage. (Thesis). Universidade de Évora. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:dspace.uevora.pt:10174/21001

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Silva, Mara Teresa Caldeira da. “Novel biocides for cultural heritage.” 2017. Thesis, Universidade de Évora. Accessed April 02, 2020. https://www.rcaap.pt/detail.jsp?id=oai:dspace.uevora.pt:10174/21001.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Silva, Mara Teresa Caldeira da. “Novel biocides for cultural heritage.” 2017. Web. 02 Apr 2020.

Vancouver:

Silva MTCd. Novel biocides for cultural heritage. [Internet] [Thesis]. Universidade de Évora; 2017. [cited 2020 Apr 02]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:dspace.uevora.pt:10174/21001.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silva MTCd. Novel biocides for cultural heritage. [Thesis]. Universidade de Évora; 2017. Available from: https://www.rcaap.pt/detail.jsp?id=oai:dspace.uevora.pt:10174/21001

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.