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Dissertations / Theses on the topic 'Bacterial pigments'

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Published: 4 June 2021

Last updated: 29 January 2023

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1

Lin, Ying-Chuan. "Production, Location, and Binding of Violacein in Janthinobacterium." Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc798326/.

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Violacein is a purple pigment typically produced by species of Chromobacterium and Janthinobacterium. A soil isolate, identified as as Janthinobacterium, was studied. Maximal pigmentation ocurred at 25°C under aerobic conditions in the Keeble and Cross medium.

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2

Abusada, Gabi M. (Gabi Michael). "Studies on the Mechanism of Protection by Carotenoids Against Photodynamic Killing in Curtobacterium Flaccumfaciens Pathover Poinsettiae." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc332581/.

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The mechanism of protection by carotenoids against photodynamic killing in Curtobacterium flaccumfaciens pathover poinsettiae (C. poinsettiae) was studied using pigment mutants isolated by treatment with nitrosoguanidine and DNA gyrase inhibitors. Growth rates, pigment composition, pigment levels and the ultrastructure of the wild-type streptomycin resistant strain of G. poinsettiae (wt-str) and all mutants were compared. One mutant, NTG-1, lacked colored carotenoids, and another, NTG-2, was a slow growing mutant containing low levels (14%) of wild-type carotenoid pigments. Except for NTG-1, t

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3

Campbell, Alan L. (Alan Lee). "The Genetics of Pigmentation in Corynebacterium poinsettiae ATCC 9682." Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc330778/.

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Corynebacterium poinsettiae mutant strains blocked in carotenoid biosynthesis were obtained by treatment with the mutagen N-methyl-N1-nitro-N-nitrosoguanidine. Additional carotenoid (Crt) mutant strains were obtained from a previous study conducted in our laboratory. Fifty-nine Crt mutants affected in carotenoid biosynthesis were examined by a normal phase high performance liquid chromatography (HPLC) system. Pigment extracts of Crt mutants and C. poinsettiae wild type strains were resolved by an isocratic system with hexane:acetone:dicholoromethane, 11.35:1.73:1.00 (by vol.) as the eluting so

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4

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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5

Borrego, i. Moré Carles. "Heterogeneïtat pigmentària en bacteris fotosintètics verds: fisiologia i significació ecològica." Doctoral thesis, Universitat de Girona, 1996. http://hdl.handle.net/10803/96755.

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Green bacteria possess one of the most complexes antenna systems within the group of the photosynthetic microorganisms. One reason for this complexity is the high diversity of pigments antenna, the bacteriochlorophylls (BChls c, d or e), consisting of a mixture of various forms regularly arranged within the antenna units (the chlorosomes). This pigment diversity makes difficult the accurate analysis and identification of the different bacteriochlorophylls forms by the conventional spectrophotometrical techniques<br>Els bacteris verds posseeixen un dels sistemes antena més complexes dins el gru

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6

Tanniou, Anaëlle. "Etude de la production de biomolécules d'intérêt (phlorotannins, pigments, lipides) d' algues brunes modèles par des approches combinées de profilage métabolique et d'écophysiologie." Thesis, Brest, 2014. http://www.theses.fr/2014BRES0055/document.

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Notre étude s’inscrit dans un processus de recherche de nouveaux composés d’origine naturelle à activités biologiques avérées à partir de macroalgues brunes, avec d’éventuelles perspectives d’exploitation industrielle. Ainsi, dans un premier volet nous avons testé des méthodologies innovantes en matière d‘extraction en utilisant trois espèces d’algues brunes comme modèles. Nous avons optimisé le protocole d’extraction solide/liquide en estimant divers paramètres cruciaux qui influent sur le rendement d’extraction et sur les activités antiradicalaires des composés extraits. Soucieux de trouver

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Omer, Zahra Saad. "Bacterial-plant associations with special focus on pink-pigmented facultative mehtylotrophic bacteria (PPFMs) /." Uppsala : Dept. of Plant Pathology and Biocontrol Unit, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a456-ab.html.

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8

Torres, Ane Pamela Capucci [UNESP]. "Biomassa bacteriana como aditivo de ração de aves e peixes." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/94595.

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Made available in DSpace on 2014-06-11T19:27:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-11-05Bitstream added on 2014-06-13T19:35:09Z : No. of bitstreams: 1 torres_apc_me_araca.pdf: 261452 bytes, checksum: 991e448a142886f9718c07c6963016f3 (MD5)<br>Rubrivivax gelatinosus é uma bactéria fototrófica natural de ambientes aquáticos que apresenta a capacidade de crescer em substratos contendo diversos compostos orgânicos. Neste trabalho, a biomassa da bactéria, produzida em águas residuárias provenientes de abate e processamento de pescado, foi caracterizada em relação a cor, composi

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Sarcina, Maria. "Pigment-protein interactions within photosystem II." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313030.

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10

Fraser, Niall Johnston. "Modified pigments and mechanisms of energy transfer in LH2 complexes from purple bacteria." Thesis, University of Glasgow, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301678.

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11

Schwarzentruber, Patrick. "Microbiological characterisation of white pigment slurries : a strategy for bacteria management." Thesis, University of Warwick, 2003. http://wrap.warwick.ac.uk/73547/.

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The microbiological characterisation as well as the application of microbiocides for the storage and protection of mineral dispersions is of ever-increasing interest for scientists and industrialists and includes many challenges for the mineral slurry producer and user. Increasing conversion from dry pigment handling to water-based dispersions is taking place over a wide range of production applications, for example, papermaking filler products and coating formulations in both the paper and paint industries. The requirements for the delivery of preserved slurried products begins from the momen

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12

Jacobs, Anelet. "Investigation and comparison of adherence- and biofilm-forming capacities of yellow-pigmented Chryseobacterium, Elizabethkingia and Myroides spp. isolated from South African aquaculture systems." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/19634.

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Thesis (MSc)--University of Stellenbosch, 2007.<br>ENGLISH ABSTRACT: In the aquaculture setting, opportunistic pathogens are present as part of the normal aquatic microflora, colonizing surfaces in fish tanks as part of biofilm communities, and often causing severe economic losses to the aquacultural industry. Isolates belonging to the genera Chryseobacterium, Elizabethkingia, Myroides and Empedobacter have been isolated from diseased fish, and are responsible for causing secondary fish infections, fish- and food-product spoilage, and have been described as etiological agents of various

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Vaitkevičius, Karolis. "Effects of Vibrio cholerae protease and pigment production on environmental survival and host interaction /." Umeå : Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1474.

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McDermott, Gerry. "Structural studies on an integral membrane light-harvesting complex." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337507.

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15

Moyo, Anesu Conrad. "Biological approach to improving the evaporation rates of mine wastewater desalination brine treated in evaporation ponds." University of the Western Cape, 2021. http://hdl.handle.net/11394/7982.

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Philosophiae Doctor - PhD<br>The disposal of brine effluent from inland wastewater desalination plants is a growing global problem with adverse economic and environmental implications because of the substantial cost associated with its disposal and the potential for polluting groundwater resources. Currently, the best and most economical option for brine disposal from inland desalination plants is the use of evaporation ponds, which concentrate the liquid until getting a solid waste that can be valued or directly managed by an authorized company. The effectiveness of these ponds is ther

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Torres, Ane Pamela Capucci. "Biomassa bacteriana como aditivo de ração de aves e peixes /." Araçatuba : [s.n.], 2010. http://hdl.handle.net/11449/94595.

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Orientador: Elisa Helena Giglio Ponsano<br>Banca: Marcelo Vasconcelos Meireles<br>Banca: Otto Mack Junqueira<br>Resumo: Rubrivivax gelatinosus é uma bactéria fototrófica natural de ambientes aquáticos que apresenta a capacidade de crescer em substratos contendo diversos compostos orgânicos. Neste trabalho, a biomassa da bactéria, produzida em águas residuárias provenientes de abate e processamento de pescado, foi caracterizada em relação a cor, composição centesimal, composição microbiológica e conteúdo de pigmentos carotenóides e aminoácidos, visando avaliar seu potencial como ingrediente par

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Yang, Wenbo Ms. "Effect of Chlorine Dioxide Gas Treatment on Bacterial Inactivation Inoculated on Spinach Leaves and on Pigment Content." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429609779.

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Murphy, Julianna E. "Catalytic Effect of Iron Oxidizing Bacteria on the Production of Pigment from Acid Mine Drainage." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou149383043673114.

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Vaitkevicius, Karolis. "Effects of Vibrio cholerae protease and pigment production on environmental survival and host interaction." Doctoral thesis, Umeå universitet, Molekylärbiologi (Medicinska fakulteten), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1474.

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Only two out of more than 200 V. cholerae serogroups, classified on the basis of LPS structure, are associated with epidemic or pandemic cholera. These toxigenic serogroups carry phage-derived pathogenicity islands coding for the main virulence factors for establishment of cholera disease – cholera toxin (CTX) and toxin-coregulated pilus (TCP). The latter also serves as a bacterial surface receptor for the CTXΦ – the filamentous phage which carries the cholera toxin genes into otherwise harmless to human, environmental bacterium V. cholerae. In its natural aquatic habitat V. cholerae is subjec

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Grassi, Thiago Luís Magnani [UNESP]. "Qualidade de filés de tilápia alimentadas com pigmentante de origem bacteriana: Thiago Luís Magnani Grassi. -." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/124481.

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Made available in DSpace on 2015-07-13T12:10:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-12-16. Added 1 bitstream(s) on 2015-07-13T12:25:19Z : No. of bitstreams: 1 000836384.pdf: 412403 bytes, checksum: 5c3371fcf3a2491bbc23d94ad1d0711f (MD5)<br>O tom avermelhado de alguns peixes age como um fator distintivo em relação ao pescado convencional de carne branca, agregando valor e propiciando o surgimento de um novo produto. Por esse motivo, o estudo de fontes pigmentantes para utilização em dietas de peixes de importância econômica é assunto de considerável interesse para a aquicul

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Grassi, Thiago Luís Magnani. "Qualidade de filés de tilápia alimentadas com pigmentante de origem bacteriana / Thiago Luís Magnani Grassi. -." Araçatuba, 2014. http://hdl.handle.net/11449/124481.

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Orientador: Elisa Helena Giglio Ponsano<br>Banca:Rachel Cristina Prehl Alves<br>Banca: Silvia Helena Venturoli Perri<br>Resumo: O tom avermelhado de alguns peixes age como um fator distintivo em relação ao pescado convencional de carne branca, agregando valor e propiciando o surgimento de um novo produto. Por esse motivo, o estudo de fontes pigmentantes para utilização em dietas de peixes de importância econômica é assunto de considerável interesse para a aquicultura e a indústria de alimentos. O objetivo deste trabalho foi avaliar o efeito de diferentes fontes de carotenoides adicionados à ra

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Robert, Bruno. "Etude de la structure et des interactions au sein des complexes proteine pigments impliques dans la photosynthese bacterienne : contribution de la spectrometrie raman de resonance." Paris 6, 1987. http://www.theses.fr/1987PA066603.

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23

Cabrera, Juan Carlos. "DARK-PIGMENTED, AMOXICILLIN-RESISTANT, BACTERIAL SPECIES IN CHRONIC PERIODONTITIS MICROBIOTA IDENTIFIED WITH MATRIX ASSISTED LASER DESORPTION/IONIZATION TIME-OF-FLIGHT MASS SPECTROMETRY." Master's thesis, Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/311087.

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Oral Biology<br>M.S.<br>Dark-pigmented, gram-negative, anaerobic rods are often recovered in large numbers from the subgingival microbiome of human periodontitis, and are statistically associated with progression of chronic periodontitis. Due to their frequent expression of beta-lactamase enzymes, which hydrolyze and degrade beta-lactam class antibiotics, these species may compromise systemic periodontal antimicrobial chemotherapy involving amoxicillin, which may lead to clinical therapeutic failures in chronic periodontitis therapy. Recent studies using phenotypic methods have identified the

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Neves, Aline Aparecida Camargo das. "Análises genômicas de Methylobacterium mesophilicum SR1.6/6 com ênfase na interação com a planta hospedeira." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-04122015-174951/.

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Bactérias do gênero Methylobacterium são encontradas em associação com espécies vegetais, onde são capazes de promover o crescimento, aumentar a atividade fotossintética e reduzir o ataque de patógenos ao hospedeiro. Além de conferir estas vantagens para a planta hospedeira, estas bactérias podem também produzir biopolímeros (PHA e PHB). Desta forma, o objetivo deste trabalho foi anotar o genoma de Methylobacterium mesophilicum SR1.6/6 e avaliar o seu transcriptoma em estágios iniciais de interação com Citrus sinensis. A análise do genoma mostrou que SR1.6/6 pode produzir auxina, reduzir o est

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Hu, Qinghui. "Isolation and structural and spectral characterization of the light-harvesting pigment-protein complexes and their polypeptides from the purple bacterium Rhodocyclus tenuis /." [S.l.] : [s.n.], 1994. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10846.

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Lehmann, Rainer Patrick. "Studies on the structure and function of the bacteriochlorophyll C antenna complex of the chlorosomes from the phototrophic bacterium Chloroflexus aurantiacus : the pigment-binding function of the 5.7 kDa polypeptide /." [S.l.] : [s.n.], 1994. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10687.

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Fuentes, Quispe Ivette Alejandra. "Caracterización fisiológica y genómica de dos cepas nativas del género Shewanella con potencial biodegradador de colorantes azoicos." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2019. https://hdl.handle.net/20.500.12672/10415.

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La industria textil libera al ambiente grandes cantidades de aguas residuales que, entre otros varios contaminantes, contienen colorantes azo en su composición, los cuales son compuestos tóxicos, carcinogénicos y mutagénicos que afectan negativamente la vida acuática y la calidad del agua. El presente estudio tuvo por objetivo caracterizar a nivel fisiológico y genómico cepas nativas con potencial de degradación de colorantes azo obtenidas de un efluente de industria textil de Lima, Perú. Se aplicó el método de la microplaca a doce aislados bacterianos para su selección en base a su respuesta

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COSTA, Marília Teixeira. "Avaliação microbiana das manchas dentárias extrínsecas negras em pacientes submetidos a tratamento ortodôntico." Universidade Federal de Goiás, 2011. http://repositorio.bc.ufg.br/tede/handle/tde/1513.

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Made available in DSpace on 2014-07-29T15:25:15Z (GMT). No. of bitstreams: 1 tese mariliia teixeira costa - ciencias da saude.pdf: 592941 bytes, checksum: bbd7a80041fff15e5e5a8747d934ef5f (MD5) Previous issue date: 2011-07-04<br>Black extrinsic tooth stains appear on the smooth surfaces of teeth, parallel to the marginal gum and are considered a specific form of biofilm due to the high content of calcium, phosphate and insoluble iron salt. This study evaluated the profile of bacterial biofilms in patients with black extrinsic tooth stain with or without fixed metal braces installed. Four ba

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CHEN, LYU-AN, and 陳律安. "Study on Production and Characterization of Red Pigments From The Isolated Bacterial Strains." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/7w7s3h.

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Jehlička, J., Howell G. M. Edwards, and A. Oren. "Raman spectroscopy of microbial pigments." 2014. http://hdl.handle.net/10454/10464.

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No<br>Raman spectroscopy is a rapid nondestructive technique providing spectroscopic and structural information on both organic and inorganic molecular compounds. Extensive applications for the method in the characterization of pigments have been found. Due to the high sensitivity of Raman spectroscopy for the detection of chlorophylls, carotenoids, scytonemin, and a range of other pigments found in the microbial world, it is an excellent technique to monitor the presence of such pigments, both in pure cultures and in environmental samples. Miniaturized portable handheld instruments are availa

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YU-Li-Do and 杜尤莉. "Effect of cultural methods on production of the bacterial pigment." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/10875517843966984352.

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碩士<br>建國科技大學<br>美容科技研究所<br>102<br>Chromobacterium violaceum is a bacterium commonly found in tropical and subtropical regions. C. violaceum produces and secretes a purple color compound named violacein. The purpose of this study is to develop an efficiency method for mass production of violacein as a make-up material. Different experimental conditions, including nutrition mediums, tryptophan, UV irradiation, and co-culturing C. violaceum with other bacteria were tested, and the amounts of vioalcein were measured. The results show that upon ultraviolet radiation, C. violaceum cultured in the M9

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Maresca, Julia A. "The genetic basis for pigment variation among green sulfur bacteria." 2007. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-1876/index.html.

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Chen, Yen-Chu, and 陳彥竹. "Studies on the red pigment from a Gram (-) bacterium strain No. 25." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/96202660945635910518.

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Gonçalves, S. "Bacterial cellulose as a novel substrate for retinal pigment epithelium cells transplantation in age-related macular degeneration." Doctoral thesis, 2015. http://hdl.handle.net/1822/38486.

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Tese de Doutoramento em Engenharia Química e Biológica.<br>Bacterial cellulose (BC) has been increasingly recognized for its great potential in a number of biomedical applications, due to its unique properties such as high mechanical strength, biocompatibility and non-toxicity. The feasibility of BC as a novel substrate for retinal pigment epithelium (RPE) transplantation was addressed in this thesis. BC sheets were produced in static cultures of Gluconacetobacter xylinus bacteria, sliced into thin films and dried. Two approaches were adopted to modify the BC surface: acetylation and poly

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Tzeng, Sue-Jen, and 曾素真. "Identification and Characterization of Foliar Pantoea agglomerans and Other Yellow-pigmented Bacteria from Taiwan." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/95678644029831733060.

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碩士<br>國立中興大學<br>植物病理學系<br>89<br>柒、英文摘要 A total of one hundred and seventy five strains of yellow-pigmented bacteria were isolated from twenty-two crop species and four weed plant species at different localities in Taiwan. Among them, 106 strains were Gram negative, and the other 69 strains were Gram positive. Based on Biolog identification system, 61 strains of Gram negative bacteria were identified as species in Actinobacillus, Burkholderia, Chryseobacterium, Enterobacter, Erwinia, Flavimonas, Haemophilus, Pantoea, Pseudomonas, Sphingomonas, Stenotrophomonas, and Xanthomonas. Thirt

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Guimarães, Joana Filipa da Silva Almeida Valadas. "Bio Fermented Colors - Pigmentos de Origem Bacteriana: Uma Alternativa Sustentável no Design de Moda e Têxtil." Master's thesis, 2017. http://hdl.handle.net/10400.6/6719.

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No momento em que vivemos, torna-se indispensável um acompanhamento constante sobre os perigos que colocamos ao nosso planeta e o impacto ambiental que, cada avanço tecnológico tem sobre a forma como moldamos a vida de gerações futuras. É necessário saber gerir de forma objetiva e criteriosa, as mais recentes descobertas em diversos campos, enriquecendo a nossa qualidade de vida sem, no entanto, prejudicar a sustentabilidade dos ecossistemas que nos rodeiam. Deste modo, torna-se imprescindível criar soluções alternativas e viáveis para problemas que surgem pela contínua utilização de materiais

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Shahina, Mariyam, and 瑪麗央. "Characterization of novel pigmented-bacteria and mutagenic impact of ethyl methanesulfonate on polyphasic taxonomic markers." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/jf3n7x.

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博士<br>國立中興大學<br>土壤環境科學系所<br>102<br>Bioactive natural products from the marine resources, including microorganisms encompass potential industrial and bio-medical applications. Irrespective of the enormous difficulty in isolating and harvesting marine bacteria, naturally occurring bioactive microbial metabolites are increasingly attractive due to their broad-ranging pharmacological activities, especially those with unique color pigments. However, characterization of bioactive compounds including pigments is quite complicated and thus given least importance so far in polyphasic taxonomy, which on

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Malina, Tomáš. "Umělá světlosběrná anténa založená na agregaci bakteriochlorofylu c s vybranými pigmenty." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-415452.

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Title: Artificial light-harvesting antenna based on an aggregation of bacteriochlorophyll c with selected pigments Author: Tomáš Malina Department: Department of Chemical Physics and Optics Supervisor of the master thesis: doc. RNDr. Jakub Pšenčík, Ph.D., KCHFO MFF UK Abstract: Solar energy is one of the most important energy sources for all living organisms. The light harvesting takes place in specialised photosynthetic complexes called antennas; they typically contain pigments held by a protein scaffold. Antennas of green bacteria, chlorosomes, are unique in this respect, for they do not nee

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Yen-Lin, Ho, and 何彥璘. "Unusual UVA/B Resistance in a Yellow-pigmented Bacterium Isolated from Concrete Wall Surfaces." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/75441101570467280783.

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碩士<br>國立清華大學<br>生命科學系<br>90<br>Many concrete wall surfaces that lack nutrients, water, and solar-UV protection represent an extreme environment for life. In this study, sands were sampled from nine different weathered concrete wall surfaces for viable bacterial count. Most counts were around 104 CFU/g or less. A yellow-pigmented bacterium (THY1) that appeared to be a predominant inhabitant in the harsh concrete-surface environment was isolated. An UV irradiator that provides broad-spectrum UV radiation (encompassing UVA, UVB, and UVC) was used to compare UV radiation (UVR) resistance of differ

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Jhe-GengHsu and 許哲耕. "Investigation on the feeding strategy for the fed-batch fermentation of Halobacterium salinarum and the bacterial pigment production for the scavenging of free radicals." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/4y5uh3.

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碩士<br>國立成功大學<br>化學工程學系<br>102<br>Investigation on the feeding strategy for the fed-batch fermentation of Halobacterium salinarum and the bacterial pigment production for the scavenging of free radicals Author: Jhe- Geng Hsu Advisor: Mei- Jywan Syu Department of Chemistry engineering, National Cheng Kung University SUMMARY Halobacterium salinarum is an ancient Halobacteriaceae which is able to grow at a high salt environment. It can secrete bacterial pigments which is quite potential with antioxidant application. The purpose of this study is to investigate a efficient way to culture H. salinaru

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Gouveia, André Alexandre Grangeia. "Evaluation of the antimicrobial activity from Cerâmica Cave (Portugal) bactéria : the case study of Cupriavidus sp." Master's thesis, 2018. http://hdl.handle.net/10773/25363.

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Presently, the increasing number of multidrug resistant pathogens continues to be one of the major issues to be tackled by the scientific community. This is aggravated by the inability to find antibiotics with new chemical structures and/or modes of action. Therefore, the search for novel metabolites has expanded to the prospection of bacterial drug producer’s strains in extreme environments such as caves. Caves differ from surface environments in some of their core aspects, creating an extreme and unfavourable environment for microorganisms. The absence of light, high humidity and typi

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陳冠先. "A Study on Sex Hormones in Gingival Crevicular Fluid and Black Pigmented Bacteria in Subgingival Plaque of Pregnant Women." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/53678181023601981524.

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碩士<br>高雄醫學大學<br>牙醫學研究所<br>82<br>Gingivitis is one of the most common oral diseases, which is caused by dental plaque and by the factors produced/released from it. The black pigmented bacteria in subgingival dental plaque is thought to be the pathogens of the gingivitis. Prevotella intermedia and Porphylomonas gingivalis have been shown to be closely associated with human gingivitis. These two kinds of black pigmented bacteria can use female sex hormones such as progesterone or estradiol as a source of nutrients. In pregnant women, the concentrations of progesterone and estradiol are markely in

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Li, Yu-Wen, and 李玉雯. "Purification, Cloning, and Characterization of an Amine Oxidoreductase from the Purple Pigmented Marine Bacterium, Pseudoalteromonas sp. MA C1-2." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/08260641077688824642.

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碩士<br>國立高雄海洋科技大學<br>海洋生物技術研究所<br>101<br>The marine purple pigmented bacterium Pseudoalteromonas sp. MA C1-2 (MA C1-2) isolated from corals has previously been shown to secret two antibacterial metabolites, one having been shown to be the purple pigment, violacein, the other hydrogen peroxide. The current study aimed to identify the source of the hydrogen peroxide. Through a multi-faceted approach involving ammonium sulfate precipitation, anion exchange chromatography, SDS PAGE, and tandem MS analysis, the source of the hydrogen peroxide was narrowed down to be a amine oxidoreductase enzyme. T

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Aires, Vanessa Raquel Pinto. "Pigmentação negra em odontopediatria: revisão narrativa da literatura." Master's thesis, 2019. http://hdl.handle.net/10284/9094.

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Introdução: As pigmentações negras, um tipo de pigmentação extrínseca, são muito comummente detetadas em pacientes na consulta de medicina dentária. Estas manchas negras aderidas, apesar de serem benignas, causam desconforto aos pacientes por serem inestéticas. Nesta revisão bibliográfica serão abordadas as principais causas do aparecimento destas manchas e também os seus possíveis tratamentos. Objetivos: O objetivo do presente trabalho foi pesquisar a causa das pigmentações negras e verificar a relação que estas têm com a higiene oral, a cárie dentária, a idade do paciente e verificar se há

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