BACKGROUND: This work studied how the exposure to an unusual substrate forced a change in microbial populations during anaerobic fermentation of crude glycerol, a by-product of biodiesel production, with freshwater sediment used as an inoculum. RESULTS: The microbial associations almost completely (99.9%...
Abstract In this study, the development and assessment of a modified, efficient, and cost-efficient protocol for mDNA (metagenomic DNA) extraction from contaminated water samples was attempted. The efficiency of the developed protocol was investigated in comparison to a well-established commercial kit (E...
Métodos Analíticos de la Preparación de la Muestra/economía,
Métodos Analíticos de la Preparación de la Muestra/métodos,
Bacterias/clasificación,
Bacterias/genética,
Bacterias/aislamiento & purificación,
ADN Bacteriano/genética,
ADN Bacteriano/aislamiento & purificación,
Agua Dulce/química,
Agua Dulce/microbiología,
Metagenómica/economía,
Metagenómica/métodos,
Filogenia,
Análisis de Secuencia de ADN
Zambrano, Cristina G;
Fonseca, Anelise O. S;
Valente, Júlia S. S;
Braga, Caroline Q;
Sallis, Elisa S. V;
Azevedo, Maria Isabel;
Weiblen, Carla;
Santurio, Janio M;
Botton, Sonia A;
Pereira, Daniela Isabel B.
Foram coletadas 186 amostras de água de ambientes pantanosos em 13 municípios das regiões Sul, Central e Oeste do Rio Grande do Sul, Brasil, com o objetivo de isolar e caracterizar espécies de Pythium e avaliar a sua patogenicidade empregando coelhos como modelo experimental. Em 11,8% (n=22) das águ...
Abstract INTRODUCTION: This study quantified Mycobacterium leprae bacilli in environmental water samples from five municipalities in the State of Ceará by quantitative polymerase chain reaction (qPCR) and compared the identified genotypes with those obtained from leprosy patient biopsies. METHODS: We ...
Abstract The biodegradation of synthetic dyes by fungi is emerging as an effective and promising approach. In the present study, freshwater fungal strains isolated from submerged woods were screened for the decolorization of 7 synthetic dyes. Subsequently, 13 isolates with high decolorization capability ...
Abstract:Sulfate-reducing bacteria (SRB) and methanogenic archaea (MA) share common niches in coastal sediments during the terminal phases of the anaerobic mineralization of organic matter. The purpose of this study was to analyze the spatial - temporal variation of SRB and MA in the sediments of a tropi...
Acetatos/metabolismo,
Análisis de Varianza,
Archaea/aislamiento & purificación,
Archaea/metabolismo,
Agua Dulce/microbiología,
Sedimentos Geológicos/microbiología,
Golfo de México,
Microbiota,
Lluvia,
Valores de Referencia,
Análisis Espacio-Temporal,
Bacterias Reductoras del Azufre/aislamiento & purificación,
Temperatura,
Factores de Tiempo,
Clima Tropical
Abstract Microturbellarians typically belong to the benthos and may occur in a wide variety of environments. They are abundant in freshwater and marine ecosystems and may occur in moist terrestrial habitats. However, turbellarians are seldom taken into account in studies of biodiversity. Most studies on ...
Biodiversidad,
Brasil,
Fenómenos Ecológicos y Ambientales,
Ecosistema,
Agua Dulce/análisis,
Agua Dulce/microbiología,
Hidrobiología/métodos,
Hidrobiología/estadística & datos numéricos,
Invertebrados/clasificación,
Ríos,
Turbelarios/clasificación,
Turbelarios/fisiología
Abstract Considering the importance of lignocellulose macrophyte-derived for the energy flux in aquatic ecosystems and the nutrient concentrations as a function of force which influences the decomposition process, this study aims to relate the enzymatic activity and lignocellulose hydrolysis in different...
Araceae/metabolismo,
Bacterias/enzimología,
Proteínas Bacterianas/metabolismo,
Celulasa/metabolismo,
Agua Dulce/química,
Lignina/metabolismo,
Paspalum/metabolismo,
Araceae/crecimiento & desarrollo,
Araceae/microbiología,
Brasil,
Carbono/metabolismo,
Celulosa/genética,
Celulosa/metabolismo,
Ecosistema,
Agua Dulce/microbiología,
Paspalum/crecimiento & desarrollo,
Paspalum/microbiología
Abstract Fecal bacteria are considered to be a potential reservoir of antimicrobial resistance genes in the aquatic environment and could horizontally transfer these genes to autochthonous bacteria when carried on transferable and/or mobile genetic elements. Such circulation of resistance genes constitut...
Antibacterianos/farmacología,
Escherichia coli/genética,
Escherichia coli/aislamiento & purificación,
Agua Dulce/microbiología,
Integrones,
Brasil,
Escherichia coli/efectos de los fármacos,
Escherichia coli/metabolismo,
Proteínas de Escherichia coli/genética,
Proteínas de Escherichia coli/metabolismo,
Variación Genética,
Filogenia
Estudios realizados han demostrado una marcada asociación entre la contaminación del medio y la presencia de enfermedades de riesgo ambiental dentro de la ciudad, además de daño al medio ambiente en general por los desechos sólidos y residuales líquidos. En Ciudad de La Habana los municipios más v...
