Anaerobiosis
Mostrando 1-12 de 359 artigos, teses e dissertações.
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1. Evaluation of a Probiotic and a Competitive Exclusion Product Inoculated In Ovo on Broiler Chickens Challenged with Salmonella Heidelberg
ABSTRACT The present study evaluated a probiotic and a competitive exclusion product injected in ovo on day 18 of incubation together with Marek's disease vaccine in eggs of 56-week-old broiler breeders. Three experiments were carried out. The first trial evaluated the effect of treatments on hatchability, cecal colonization of Salmonella Heidelberg (SH), an
Rev. Bras. Cienc. Avic.. Publicado em: 2017-03
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2. Evaluation of culture media for selective enumeration of bifidobacteria and lactic acid bacteria
The purpose of this study was to test the suitability of Transgalactosylated oligosaccharides-mupirocin lithium salt (TOS-MUP) and MRS-clindamycin-ciprofloxacin (MRS-CC) agars, along with several other culture media, for selectively enumerating bifidobacteria and lactic acid bacteria (LAB) species commonly used to make fermented milks. Pure culture suspensio
Braz. J. Microbiol.. Publicado em: 2014-09
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3. Endo-and exoglucanase activities in bacteria from mangrove sediment
The mangrove ecosystem is an unexplored source for biotechnological applications. In this unique environment, endemic bacteria have the ability to thrive in the harsh environmental conditions (salinity and anaerobiosis), and act in the degradation of organic matter, promoting nutrient cycles. Thus, this study aimed to assess the cellulolytic activities of ba
Braz. J. Microbiol.. Publicado em: 2013-09
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4. Antimicrobial capacity of Aloe vera and propolis dentifrice against Streptococcus mutans strains in toothbrushes: an in vitro study
OBJECTIVES: This study evaluated in vitro the efficiency of Aloe vera and propolis dentifrice on reducing the contamination of toothbrush bristles by a standard strain of Streptococcus mutans (ATCC 25175; SM), after toothbrushing. MATERIAL AND METHODS: Fifteen sterile toothbrushes were randomly divided into 5 toothbrushing groups: I (negative control): witho
Journal of Applied Oral Science. Publicado em: 2012-02
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5. Análise microbiológica comparativa da ação de diferentes agentes descontaminantes sobre superfícies de titânio / Microbiological comparison of different decontaminant agents on rough and smooth titanium surfaces: microbiological analysis
Actually, the titanium implants are a successful option of treatment in Dentistry. However, failures are possible to occur due to surface exposition to oral environment immediately or lately after its implantation. The titanium implants surfaces can be infected by bacteria and its products similarly to dental roots surfaces. The contaminants turn the inflamm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2011
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6. Requirement for cobalamin by Salmonella enterica serovars Typhimurium, Pullorum, Gallinarum and Enteritidis during infection in chickens
Salmonella enterica serovar Typhimurium synthesizes cobalamin (vitamin B12) only during anaerobiosis. Two percent of the S. Typhimurium genome is devoted to the synthesis and uptake of vitamin B12 and to B12-dependent reactions. To understand the requirement for cobalamin synthesis better, we constructed mutants of Salmonella serovars Enteritidis and Pulloru
Braz. J. Microbiol.. Publicado em: 2011-12
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7. Microbiota associated with chronic osteomyelitis of the jaws
Chronic osteomyelitis of maxilla and mandible is rare in industrialized countries and its occurrence in developing countries is associated with trauma and surgery, and its microbial etiology has not been studied thoroughly. The aim of this investigation was to evaluate the microbiota associated with osteomyelitis of mandible or maxilla from some Brazilian pa
Brazilian Journal of Microbiology. Publicado em: 2010-12
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8. Occurrence of Aggregatibacter actinomycetemcomitans in Brazilian indians from Umutina Reservation, Mato Grosso, Brazil
Aggregatibacter actinomycetemcomitans is associated with periodontal disease, especially localized aggressive periodontitis, produces a potent leukotoxin and its distribution is influenced by ethnic characteristics of the population. Objective: Using culture and polymerase chain reaction (PCR) techniques, this study evaluated the occurrence of this microorga
Journal of Applied Oral Science. Publicado em: 2009-10
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9. Influence of preventive dental treatment on mutans streptococci counts in patients undergoing head and neck radiotherapy
The aim of this study was to evaluate the influence of chlorhexidine gluconate, sodium fluoride and sodium iodine on mutans streptococci counts in saliva of irradiated patients. MATERIAL AND METHODS: Forty-five patients were separated into three experimental groups and received chlorhexidine (0.12%), sodium fluoride (0.5%) or sodium iodine (2%), which were u
Journal of Applied Oral Science. Publicado em: 2009
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10. Aerobic and anaerobic biodegradation of petroleum from Pampo Sul Field, Campos Basin, RJ, Brazil / Biodegradação aerobia e anaerobia de petroleo do Campo Pampo Sul, Bacia de Campos, RJ
The main purpose of this thesis was the simulation of petroleum biodegradation processes under reservoir aerobic, anaerobic or mixed conditions. The biodegradation experiments were first adapted to the laboratory scale in order to simulate different reservoir conditions taking care to select the best parameters to accelerate million times the biodegradation
Publicado em: 2009
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11. Mechanisms of synthesis and degradation of radical nitric oxide by mitochonderia of Arabidopsis thaliana / Mecanismos de sintese e degradação do radical oxido nitrico pela mitocondria de Arabidopsis thaliana
The objective of this work was to study the mechanisms of synthesis and degradation of NO by plant mitochondria, with emphasis on the influence of the NAD(P)H dehydrogenases and the alternative oxidase (AOX) in these processes. The experiments were carried out with mitochondria isolated from cells in culture of the model plant Arabidopsis thaliana. Initially
Publicado em: 2008
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12. Dry material losses and qualitative evaluation of corn grain stored in hermetic units / Determinação da perda de matéria seca e avaliação qualitativa de grãos de milho armazenados em bolsas herméticas
A significant increase in the grain sector has been observed over the last few years, leading to the expansion of the balance of trade. However, in various Brazilian States, storage systems are composed of old structures, precarious for storage which end up compromising the quality of the product during storage. In order for the sector to increase exports an
Publicado em: 2008