Pcr Dgge
Mostrando 13-24 de 256 artigos, teses e dissertações.
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13. The effect of heavy metal contamination on the bacterial community structure at Jiaozhou Bay, China
Abstract In this study, determination of heavy metal parameters and microbiological characterization of marine sediments obtained from two heavily polluted sites and one low-grade contaminated reference station at Jiaozhou Bay in China were carried out. The microbial communities found in the sampled marine sediments were studied using PCR-DGGE (denaturing gr
Braz. J. Microbiol.. Publicado em: 2017-03
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14. Bacterial Diversity in the Digestive Tracts of Four Indian Air-Breathing Fish Species Investigated by PCR Based Denaturing Gradient Gel Electrophoresis
ABSTRACT An investigation was conducted to identify the allochthonous microbiota (entire intestine) and the autochthonous microbiota in proximal intestine (PI) and distal intestine (DI) of four species of Indian air-breathing fish (climbing perch; Anabas testudineus, murrel; Channa punctatus, walking catfish; Clarias batrachus and stinging catfish; Heteropne
Braz. arch. biol. technol.. Publicado em: 02/12/2016
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15. Evaluation of bacterial diversity recovered from petroleum samples using different physical matrices
ABSTRACT Unraveling the microbial diversity and its complexity in petroleum reservoir environments has been a challenge throughout the years. Despite the techniques developed in order to improve methodologies involving DNA extraction from crude oil, microbial enrichments using different culture conditions can be applied as a way to increase the recovery of D
Braz. J. Microbiol.. Publicado em: 2016-09
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16. Distribuição das comunidades de Arquéias e Bactérias em um reservatório subtropical.
Resumo: Objetivo As comunidades microbianas desempenham papel crucial nos processos ambientais como na mineralização de matéria orgânica e ciclagem de nutrientes em ambientes aquáticos. No entanto, apesar da importância ecológica de archaea e bactéria em ambientes aquáticos, a estrutura destas comunidades permanece pouco estudada. Métodos Neste s
Acta Limnol. Bras.. Publicado em: 2015-12
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17. Bacaba beverage produced by Umutina Brazilian Amerindians: Microbiological and chemical characterization
Bacaba chicha is a beverage prepared by the indigenous Umutina people from the bacaba fruit (Oenocarpus bacaba), a purple berry that is rich in fat and carbohydrates, as well as a source of phenolic compounds. In this study, samples of bacaba chicha beverage were collected, and the microbial community was assessed using culture-dependent and -independent tec
Braz. J. Microbiol.. Publicado em: 27/10/2015
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18. Comunidades de Fungos Micorrízicos Arbusculares Por Pcr-dgge Na Cultura Da Mandioca, Após Cultivo De Plantas De Cobertura
RESUMO A mandioca é uma planta altamente micotrófica, e o sistema de pré-cultivo pode influenciar a densidade de propágulos de fungos micorrízicos arbusculares (FMAs) e a composição de suas comunidades. O objetivo deste trabalho foi avaliar a ocorrência e estrutura de comunidades de FMAs por reação em cadeia da polimerase (PCR) e eletroforese em ge
Rev. Bras. Ciênc. Solo. Publicado em: 2015-10
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19. Characterization of pectinase activity for enology from yeasts occurring in Argentine Bonarda grape
Pectinolytic enzymes are greatly important in winemaking due to their ability to degrade pectic polymers from grape, contributing to enhance process efficiency and wine quality. This study aimed to analyze the occurrence of pectinolytic yeasts during spontaneous fermentation of Argentine Bonarda grape, to select yeasts that produce extracellular pectinase
Braz. J. Microbiol.. Publicado em: 2015-09
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20. Mudanças Iniciais na Diversidade Metabólica e na Estrutura da Comunidade Bacteriana do Solo em Cana-de-açúcar, em Dois Sistemas de Manejo de Colheita
A queima da cana-de-açúcar previamente à colheita é amplamente utilizada no Brasil. Entretanto, em razão das restrições ambientais, a colheita sem queima vem ganhando espaço. Consequentemente, espera-se que o acúmulo de resíduos da cultura na superfície do solo altere a comunidade microbiana, iniciando mudanças na diversidade metabólica do solo
Rev. Bras. Ciênc. Solo. Publicado em: 2015-06
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21. Evaluation of the microbial diversity in sequencing batch reactor treating linear alkylbenzene sulfonate under denitrifying and mesophilic conditions using swine sludge as inoculum
The objective of this study was to evaluate the degradation of Linear Alkylbenzene Sulfonate (LAS) in anaerobic sequencing batch reactor (ASBR) under denitrifying conditions using swine sludge as inoculum. The reactor was operated for 104 days with synthetic substrate containing nitrate, and LAS was added later (22 mg/L). Considering the added mass of the LA
Braz. arch. biol. technol.. Publicado em: 06/03/2015
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22. Composição diferencial das comunidades bacterianas na rizosfera de variedas de cana-de-açúcar
A cultura da cana-de-açúcar é de extrema importância no cenário agrícola nacional. No entanto, pouco se sabe sobre a estruturação das comunidades microbianas associadas aos solos e às rizosferas de tais plantas. O objetivo deste trabalho foi avaliar a estrutura e diversidade das comunidades de bactérias associadas ao solo e à rizosfera de seis var
Rev. Bras. Ciênc. Solo. Publicado em: 2014-12
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23. Microbial dynamics during azo dye degradation in a UASB reactor supplied with yeast extract
The present work aimed to investigate the microbial dynamics during the anaerobic treatment of the azo dye blue HRFL in bench scale upflow anaerobic sludge bed (UASB) reactor operated at ambient temperature. Sludge samples were collected under distinct operational phases, when the reactor were stable (low variation of color removal), to assess the effect of
Braz. J. Microbiol.. Publicado em: 2014-12
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24. A procedure to evaluate the efficiency of surface sterilization methods in culture-independent fungal endophyte studies
Extraneous DNA interferes with PCR studies of endophytic fungi. A procedure was developed with which to evaluate the removal of extraneous DNA. Wheat (Triticum aestivum) leaves were sprayed with Saccharomyces cerevisiae and then subjected to physical and chemical surface treatments. The fungal ITS1 products were amplified from whole tissue DNA extractions. A
Braz. J. Microbiol.. Publicado em: 2014-09