Anaerobiosis
Mostrando 13-24 de 359 artigos, teses e dissertações.
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13. Biosurfactant production by Bacillus subtilis with enhanced efficiency in heavy oil recovery / Produção de biossurfactante por Bacillus subtilis com elevada eficiência na mobilização de óleo pesado
Os óleos pesados (10-20 API) constituem mais da metade das reservas mundiais de petróleo, havendo previsões de que em 2025 sejam a principal fonte de petróleo no mundo. As dificuldades na exploração desse tipo de óleo estão associadas a características desfavoráveis, como densidade e viscosidade (100 a 10000 cP). Com a necessidade de melhorar o apr
Publicado em: 2008
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14. Susceptibility of strict and facultative anaerobes Isolated from endodontic infections to metronidazole and beta-lactams
Endodontic infections are mixed aerobic-anaerobic infections and several microbial groups associated to these pathologies are also involved in orofacial infections. The goal of this study was to evaluate the susceptibility of microorganisms isolated from endodontic infections to beta-lactams and metronidazole and verify the production of beta-lactamases. Cli
Journal of Applied Oral Science. Publicado em: 2007-12
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15. Eficácia do ácido peracético na desinfecção de instrumentos contaminados / Efficacy of peracetic acid in the disinfection of contaminated instruments
This research was realized to evaluate of the of peracetic or peroxiacetic acid (PAA), at 0,2%, efficacy in the disinfection of instruments contaminated by oral microbiota. A collect was realized with heat sensitive instruments used commonly in some procedures in Dentistry in four sites of the oral cavity: buccal mucosa (left and right sides), hard palate an
Publicado em: 2007
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16. Aumento da suscetibilidade de Candida albicans à clorexidina em condições de anaerobiose / Susceptibility increase of Candida Albicans to chlorhexidine under anaerobiosis condition
A mucosa bucal é o maior sítio de colonização por Candida albicans, porém outros sítios como bolsas periodontais podem abrigar este fungo. O papel da Candida na patogênese da periodontite é desconhecido, porém se encontra associada a uma microbiota complexa formada em sua maioria por bactérias. Com base na falta de informações sobre a atuação d
Publicado em: 2007
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17. Shelf-life extension and quality maintenance of fresh-cut âMenina Brasileiraâ zucchini. / Shelf-life extension and quality maintenance of fresh-cut âMenina Brasileiraâ zucchini
Fresh-cut zucchini appears as alternative to consumers that look for practicality during meals preparation. The goal of this work was to study conservation methods that extend the shelf-life and keep the quality of fresh-cut âMenina Brasileiraâ zucchini. Physiological, chemical, physical-chemical and biochemical characteristics of fresh-cut zucchini were b
Publicado em: 2007
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18. Produção de biossurfactantes por Bacillus spp. em condição anaeróbia / Anaerobic production of biosurfactants by Bacillus spp
O presente trabalho objetivou determinar as condições nutricionais e de potencial redox que estimulem o crescimento e a produção de biossurfactantes por três isolados do gênero Bacillus. Foram utilizados três isolados pertencentes à coleção de culturas do Laboratório de Biotecnologia e Biodiversidade para o Meio Ambiente (LBBMA) que possuíam cara
Publicado em: 2007
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19. Otimização das condições de cultivo de Erysipelothrix rhusiopathiae para produção de vacina contra erisipela suína
Swine erysipelas is one of the diseases responsible for the great economic losses in swine-producing areas of the world. The bacteria Erysipelothrix rhusiopathiae is the causative agent of erysipelas, and the vaccines currently available for prevention of this disease are produced with the whole broth culture containing the inactivated microorganism or its l
Publicado em: 2007
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20. Caracterização dos padrões de expressão de glucosiltransferases B e C, da proteina ligante de glucano B e de possiveis genes reguladores em genotipos distintos de Streptococcus mutans / Expression analysis of glucosyltransferases B and C, glucan-binding protein B and their putative regulatory genes in distinct genotypes of Streptococcus mutans
Streptococcus mutans, the main pathogen of dental caries, have the capacity to accumulate in the dental biofilm in the presence of sucrose, under highly acidic conditions that are responsible for teeth demineralization. The glucosyltransferases B (GtfB) and C (GtfC) produced by S. mutans are essential in this process, because catalyze the synthesis of water-
Publicado em: 2006
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21. Fisiologia de Bacillus subtilis R14 sob condiÃÃes restrita e irrestrita de oxigÃnio: produÃÃo de compostos bioativos e esporulaÃÃo
Several strains of Bacillus subtilis produce lipopeptides, which are amphiphilic compounds with surfactant and antimicrobial activities. Production of lipopeptide, sporulation and competence in B. subtilis are interconnected through a complex array of controlling elements. The aims of this study were to evaluate the activity of B. subtilis R14 against severa
Publicado em: 2005
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22. Papel da redutase do nitrato em soja [Glycine max(L.) Merr. Cv IAC-17] sob condições de hipoxia do sistema radicular / The nitrate role of the reductase in soybean [Glycine max(L.) Merr. Cv IAC-17] under hipoxic conditions of the root system
A soja [Glycine Max (L.) Merr.] tem sido um dos modelos mais usados entre as plantas cultivadas para estudar os efeitos de tolerância à hipóxia, já que é tida como uma planta com certo grau de tolerância ao estresse de oxigênio e sua importância também tem um caráter econômico bastante relevante. Condições de hipóxia são comuns na natureza, po
Publicado em: 2005
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23. The influence of oxygen supply on the production of acetaldehyde by Zymomonas mobilis
The influence of oxygen supply rate on the growth and the production of both ethanol and acetaldehyde by the aerotolerant fermentative bacterium Z. mobilis is discussed in this work. The results showed similar values of cell mass yield (0.043 g/g) for the five different levels of initial volumetric oxygen transfer coefficient (K La) studied. The maximum spec
Brazilian Journal of Chemical Engineering. Publicado em: 2003-06
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24. The pepR Gene of Lactobacillus sakei Is Positively Regulated by Anaerobiosis at the Transcriptional Level
Lactobacillus sakei is a lactic acid bacterium belonging to the natural flora of meat products. It constitutes the main flora of vacuum-packed meat and is largely used in western Europe as a starter for the manufacturing of fermented sausages. This species is able to grow both under aerobiosis and anaerobiosis. In many technological processes involving it, o
American Society for Microbiology.