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Dissertations / Theses on the topic 'Bacitracin'

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Published: 4 June 2021
Last updated: 25 July 2025

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1

Alencar, Amanda de Araújo. "Produção de bacitracina por bacillus licheniformis (UCP1010) utilizando meio alternativo à base de soro de leite." Universidade Católica de Pernambuco, 2011. http://www.unicap.br/tede//tde_busca/arquivo.php?codArquivo=577.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A bacitracina é um dos mais importantes antibióticos polipeptídicos, produzido por Bacillus licheniformis e Bacillus subtilis, funcionando como inibidor da biossíntese da parede celular. O soro de leite é um rejeito da fabricação de queijos de alto valor nutricional, sendo considerado um poluente extremamente problemático devido à elevada carga orgânica e grande volume gerado. O presente trabalho teve como objetivo estudar o potencial biotecnológico de B. licheniformis UCP1 01 O, isolada de solo contaminado por petróleo, na produçã
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2

Gauntlett, Jonathan C., and n/a. "Biochemical and molecular characterisation of bacitracin resistance in Enterococcus faecalis." University of Otago. Department of Microbiology & Immunology, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080404.143509.

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Resistance to the antibiotic bacitracin in Enterococcus faecalis strain AR01/DGVS is conferred by the genes bcrABD that are under the control of the regulatory protein BcrR. The N-terminal domain of BcrR has similarity to the helix-turn-helix motif of DNA-binding proteins and topological modelling predicts that the C-terminal domain contains four transmembrane α-helices. These data have led to the hypothesis that BcrR is a novel transmembrane transcriptional regulator which acts to both sense bacitracin and initiate transcription of bcrABD. The transcription of bcrABD in the presence of bacitr
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3

Murphy, Tania Marcela. "Elicitation studies for enhanced production of bacitracin A by Bacillus licheniformis cultures." Thesis, University of Westminster, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502244.

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Elicitation, a successful strategy for overproduction of secondary metabolites has been reported in plant, fungal and filamentous bacteria. Based on this evidence, elicitation was assessed for its potential to enhance antibiotic production in Bacillus cultures. This work reports, for the first time, the effect of oligosaccharide elicitors, concentration and addition time through optimisation studies for the enhancement of bacitracin A production by Bacillus licheniformis cultures. The optimal elicitor type, addition time and concentration was 100 mg L-1 of oligoguluronate (OG) at 24 hours. Dif
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4

Holroyd, Christopher Paul. "A study of bacitracin production in a chemostat with and without biomass recycle." Thesis, University of Kent, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303148.

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5

Tang, Christian C. "Structure and Activity of Metallo-Peptides." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6961.

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Metal ions are ubiquitously found in all living systems and play vital roles in supporting life forms by performing an array of biological activities. Such biological activities include binding and transforming organic molecules, and also acting as active centers and cofactors for catalysis of various acid-base and redox reactions in biological system. The main focus in bioinorganic chemistry is to elucidate the structural and functional roles of metals in biological systems. Among all transition metal ions, Cu2+ and Fe3+ are especially versatile and important due to their abilities to go thro
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6

Neumüller, Andrea. "Untersuchungen zur Bacitracin-Selbst-Resistenz in Bacillus licheniformis ATCC 10716 und Grundlagen zur gerichteten Protein-Evolution von Adenylierungs-Domänen aus Peptidsynthetasen." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=96238707X.

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7

Zhu, Ziyu [Verfasser]. "Bacitracin reduces the cytotoxic effects of Clostridium difficile toxins A and B on mammalian cells and human intestinal organoids / Ziyu Zhu." Ulm : Universität Ulm, 2021. http://d-nb.info/1228439109/34.

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8

Banerjee, Sagarika. "EFFECTS OF LIVESTOCK ANTIBIOTICS ON NITRIFICATION, DENITRIFICATION, AND MICROBIAL COMMUNITY COMPOSITON IN SOILS ALONG A TOPOGRAPHIC GRADIENT." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_theses/43.

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Several types of antibiotics (roxarsone, virginiamycin, and bacitracin) are widely included in poultry feed to improve animal growth yields. Most of the antibiotics are excreted in manure which is subsequently applied to soils. One concern with this practice is that antibiotics may affect several microbially-mediated nutrient cycling reactions in soils that influence crop productivity and water quality. The main objectives of this study were to determine the effects of livestock antibiotics on nitrification, denitrification, and microbial community composition in soils along a topographic grad
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9

Francisco, Fabiane Lacerda. "Doseamento microbiológico de neomicina e bacitracina - desenvolvimento e validação de método rápido em microplacas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-28042016-110201/.

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Os ensaios microbiológicos são utilizados para avaliar a atividade antimicrobiana desde a descoberta do uso dos antibióticos. Apesar dos ensaios microbiológicos serem amplamente empregados para determinação da potência de antibióticos em formas farmacêuticas, uma vez que fornecem a medida da atividade biológica, apresentam limitações quanto a baixa reprodutibilidade e tempo de análise. O objetivo deste trabalho foi desenvolver, otimizar e validar ensaio colorimétrico rápido em microplaca para determinar a potência da neomicina e bacitracina em produtos farmacêuticos. Metodologias de análise fa
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10

Wei, Shan. "Towards a Better Understanding of Poultry Intestinal Microbiome through Metagenomic and Microarray Studies." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1357219743.

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11

Metolina, Patrícia. "Degradação do antibiótico bacitracina zí­ncica em meio aquoso através de processos oxidativos avançados." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-24092018-082606/.

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A presença de antibióticos no ecossistema representa um sério risco à saúde humana e animal em virtude do desenvolvimento crescente de resistência bacteriana. Uma vez que a maioria dos antibióticos é persistente à degradação biológica, os processos oxidativos avançados são apontados como uma das tecnologias mais efetivas para decompor esses compostos em águas residuárias. A bacitracina zíncica (Bc-Zn) é um potente antibiótico constituído por uma mistura complexa de peptídeos não-biodegradáveis, conjugados ao zinco. Apesar de ser um antibiótico amplamente consumido na medicina humana e animal,
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12

Tay, William Maung. "Metallopeptides as model systems for the study of Cu(ii)-dependent oxidation chemistry." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002464.

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13

Bernard, Rémi. "Résistance à la bacitracine chez Bacillus subtilis." Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2007. http://tel.archives-ouvertes.fr/tel-00350345.

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L'enveloppe bactérienne est une cible majeure d'un grand nombre d'antibiotiques naturels. Certains provoquent d'importantes perturbations de la membrane cytoplasmique, d'autres ciblent spécifiquement les différentes étapes enzymatiques de la voie de biosynthèse du peptidoglycane, constituant majeur de la paroi. Pour contrer l'action de ces antibiotiques, les bactéries ont développé divers systèmes de résistance leur conférant un avantage sélectif dans leur niche écologique. Le rejet de l'antibiotique est un des principaux mécanismes de résistance rencontré chez les bactéries. Il implique parfo
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14

Bernard, Rémi Pierre. "Résistance à la Bacitracine chez Bacillus subtilis." Aix-Marseille 2, 2007. http://theses.univ-amu.fr.lama.univ-amu.fr/2007AIX22028.pdf.

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L’enveloppe bactérienne est une cible majeure d’un grand nombre d’antibiotiques naturels. Certains provoquent d’importantes perturbations de la membrane cytoplasmique, d’autres ciblent spécifiquement les différentes étapes enzymatiques de la voie de biosynthèse du peptidoglycane, constituant majeur de la paroi. Pour contrer l’action de ces antibiotiques, les bactéries ont développé divers systèmes de résistance leur conférant un avantage sélectif dans leur niche écologique. Le rejet de l’antibiotique est un des principaux mécanismes de résistance rencontré chez les bactéries. Il implique parfo
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15

Descamps, Elodie Vamecq Joseph. "La protéine disulfide isomérase et l'ischémie cérébrale une voie de neuroprotection ? /." [S.l.] : [s.n.], 2009. http://tel.archives-ouvertes.fr/tel-00399737/fr.

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16

Galindo, Reyes Yeivi Susan. "Validación del método analítico microbiológico: valoración de bacitracina 50 000ui/100g en un producto terminado." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2012. https://hdl.handle.net/20.500.12672/11573.

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La valoración microbiológica de los antibióticos es un parámetro fundamental para asegurar un alto nivel de efectividad y eficiencia en los productos farmacéuticos. En el presente trabajo se desarrolla y valida un método analítico microbiológico para la valoración del antibiótico bacitracina 50 000 UI/100g en productos farmacéuticos de uso tópico. El procedimiento incluye el uso del medio N°11 (pH 6,5) como agar base, a Micrococcus luteus ATCC 10240 como microorganismo testigo y al método de difusión en agar como el diseño de valoración elegido. Se describe el proceso de validación del método
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17

El, Ghachi Meriem. "Etude du métabolisme de l'undécaprényl-phosphate impliqué dans la voie de biosynthèse du peptidoglycane chez E. Coli." Paris 11, 2006. http://www.theses.fr/2006PA114840.

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Chez les bactéries l’undécaprényl-phosphate (C55-P) est un transporteur lipidique essentiel impliqué dans la translocation des motifs monomériques disaccharides-pentapeptide du peptidoglycane au travers de la membrane cytoplasmique. Pourtant le métabolisme de C55-P restait une « boîte noire » non encore élucidée. Un gène, nommé bacA, a été identifié par criblage d’une banque d’ADN de E. Coli sur la base de résistance à la bacitracine. Nous avons démontré que bacA code pour une C55-PP phosphatase. Le caractère non essentiel du gène bacA a cependant été démontré. Ce résultat surprenant nous a co
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18

Descamps, Elodie. "La protéine disulfide isomérase et l'ischémie cérébrale : une voie de neuroprotection ?" Phd thesis, Lille 2, 2009. http://www.theses.fr/2009LIL2S009.

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Es accidents vasculaires cérébraux (AVC) représentent, dans nos contrées, une cause importante de handicap et de mortalité. Les approches thérapeutiques restent toutefois relativement impuissantes face à ce problème de santé publique. Elles reposent essentiellement sur la prévention ou la suppression de facteurs de risques tels que le tabagisme, l'hypertension ou encore l'hypercholestérolémie. L'AVC peut être hémorragique, mais dans 80% des cas son origine vasculaire est obstructive. Son traitement aigu peut dans ce cas bénéficier d'agents thrombolytiques dont l'administration est cependant so
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19

Asmat, García Iván Alessandro. "Comparación del rendimiento productivo de pollos de engorde suplementados con un fitogénico más un probiótico versus un antibiótico (zinc bacitracina)." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2013. https://hdl.handle.net/20.500.12672/14424.

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Publicación a texto completo no autorizada por el autor<br>Evalúa el efecto del rendimiento productivo de pollos de engorde suplementados con un fitogénico (aceites esenciales) más un probiótico (Enterococcus faecium, Pediococcus acidilactici, Bifidiobacterium animalis, Lactobacillus salivarius y Lactobacillus reuteri) versus un antibiótico (Zinc bacitracina). Se usaron 333 aves divididas en tres tratamientos de 111 animales con 3 repeticiones por tratamiento: 1, control; 2, antibiótico; y 3, fitogénico más probiótico. El diseño experimental es el irrestricto al azar. El trabajo tevo un tiempo
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20

Rodrigues, Ana Paula. "Preparação e caracterização de membranas de quitosana e alginato para aplicação na terapia de lesões." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266208.

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Orientador: Angela Maria Moraes<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-11T09:35:50Z (GMT). No. of bitstreams: 1 Rodrigues_AnaPaula_D.pdf: 12266653 bytes, checksum: 0091b801b742b9245223c7939d5484c2 (MD5) Previous issue date: 2008<br>Resumo: As membranas poliméricas destinadas ao tratamento de lesões cutâneas ou internas podem ser constituídas por vários tipos de polímeros, sendo a quitosana e o alginato compostos freqüentemente empregados para tal finalidade. Enquanto a quitosana é um aminopolissacarídeo
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21

Antunes, Sara Margarida Gomes. "State-of-art on gel technologies for transdermal delivery of bacitracin." Master's thesis, 2016. http://hdl.handle.net/10316/36382.

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Dissertação de mestrado em Tecnologias do Medicamento, apresentada à Faculdade de Farmácia da Universidade de Coimbra<br>Gels have consistently been studied for their role in topical and transdermal drug delivery systems as a non-invasive technique, for pharmaceutical and cosmetics application. These formulations are semi-solid three-dimensional structures, porous, with unique characteristics, such as rigidity and elasticity at the same time. Because of their high aqueous phase content, gels permit a greater dissolution of drugs through the skin and enhance skin hydration by retaining a s
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22

Charlebois, Audrey. "Étude sur le biofilm et les mécanismes de résistance à la bacitracine chez Clostridium perfringens." Thèse, 2015. http://hdl.handle.net/1866/12610.

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Clostridium perfringens est ubiquitaire dans l’environnement. Ce microorganisme peut être retrouvé dans la flore normale du tractus gastro-intestinal des mammifères et peut également causer une variété d’infections intestinales. Le phénotype de résistance à la bacitracine a déjà été rapporté chez C. perfringens mais les gènes associés n’ont pas été caractérisés. Dans cette étude, 24 des 99 isolats de C. perfringens aviaires testés ont démontré une résistance à la bacitracine. Les analyses ont révélé la présence d’un transporteur ABC ainsi que d’une undécaprénol kinase surproduite. Ces deux méc
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23

Konz, Dirk [Verfasser]. "Identifizierung und Charakterisierung des Bacitracin-Biosynthese-Operons aus Bacillus licheniformis ATCC 10716 / vorgelegt von Dirk Konz." 2004. http://d-nb.info/983848556/34.

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24

Manalu, Marison Sudianto. "Effects of the Peptide Bacitracin and Calcium on Phospholipids Membrane Molecular Dynamics Studied byFast-Field-Cycling NMR Relaxometry." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/77794200468964355001.

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碩士<br>國立中正大學<br>化學暨生物化學研究所<br>105<br>Biological membranes mostly composed of phospholipid molecules and proteins form a barrier between intra and extra-cellular environments and be able to control the material enters and exit the cell. Both in vivo and in vitro membrane destabilization can usually be induced by external agents such as bio molecules (i.e., proteins and peptides). Fast field cycling nuclear magnetic resonance relaxometry can provide valuable information because of it is sensitivity to dynamic process that occur over a broad time scale. Recorded the data for the large unilame
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25

Wagner, Björn [Verfasser]. "Chemoenzymatische Synthese von Bacitracin-Derivaten und Untersuchungen zur Optimierung der In-vitro-Zyklisierung des Surfactins / vorgelegt von Björn Wagner." 2006. http://d-nb.info/981803040/34.

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26

Neumüller, Andrea [Verfasser]. "Untersuchungen zur Bacitracin-Selbst-Resistenz in Bacillus licheniformis ATCC 10716 und Grundlagen zur gerichteten Protein-Evolution von Adenylierungs-Domänen aus Peptidsynthetasen / vorgelegt von Andrea Neumüller." 2001. http://d-nb.info/96238707X/34.

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27

Jalbert, Louis-Alexandre. "Caractérisation de la résistance à la bacitracine et évaluation in vitro de bactériophages envers les Clostridium perfringens aviaires." Thèse, 2008. http://hdl.handle.net/1866/7198.

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28

Amad, Abdulkarim Abdulmaged. "Zum Einfluss unterschiedlicher Behandlungsverfahren und Zusatzstoffe auf ernährungsphysiologische Parameter und Leistung wachsender Broiler nach Verabreichung weizenbetonter Futtermischungen." 2001. http://hdl.handle.net/11858/00-1735-0000-0006-AB8E-D.

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In mehrfaktoriellen 2 x 2 x 4 Untersuchungen im Zeitraum vom 7. - 28. Lebenstag und in Bilanzversuchen vom 15. - 20. Lebenstag mit männlichen Broilerküken (Cobb 500) wurden die Effekte der Versuchsfaktoren Zerkleinerung (Hammermühle vs. Walzenstuhl), thermische Behandlung (Konditionierung bei 70°C vs. Konditionierung/Expandierung 100°C) und Zusätze von Zink-Bacitracin bzw. Roxazym G2 (ohne Zusatz, mit Zink-Bacitracin 50 mg, mit Roxayzm G2 150 ppm und deren Zusatzkombination A+E) sowie die Interak
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29

Guiomar, Pedro Miguel Gomes. "Desenvolvimento e caracterização de uma nova formulação de Bacitracina em nanopartículas lipídicas múltiplas." Master's thesis, 2020. http://hdl.handle.net/10400.1/15157.

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O número de infeções bacterianas nos últimos anos tem vindo a aumentar acentuadamente devido a uma subida brusca na quantidade de bactérias multirresistentes. Todos os anos, um número estimado de dois milhões de pessoas sofre de infecções provenientes de agentes bacterianos. Entre estas, cerca de vinte e três mil morrem devido a complicações resultantes da resistência bacteriana. Deste modo, a procura e desenvolvimento de novos agentes antibacterianos tem vindo a tornar-se uma prioridade. No contexto desta busca, a bacitracina surge como uma alternativa. Um antibiótico esquecido e com enorme
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30

Thibodeau, Alexandre. "Effet des promoteurs de croissance bacitracine de zinc et virginiamycine sur la résistance aux antibiotiques observée chez les entérobactéries provenant de poulets à griller : étude terrain." Thèse, 2007. http://hdl.handle.net/1866/18283.

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