Microbial Activity
Mostrando 25-36 de 1156 artigos, teses e dissertações.
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25. POTENTIAL OF AUTOCHTHONOUS SULFATE-REDUCING MICROBIAL COMMUNITIES FOR TREATING ACID MINE DRAINAGE IN A BENCH-SCALE SULFIDOGENIC REACTOR
Abstract Biological acid mine drainage treatment depends significantly on inoculum origin, pH, COD/sulfate ratio, and carbon source. In this study, the performance and microbial diversity of anaerobic batch reactors used for sulfate reduction was evaluated. A medium COD/sulfate ratio of 1.14 ± 0.10 was used, and the evaluation was performed in two steps: Ph
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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26. ANTIBACTERIAL ACTIVITY OF ZINC OXIDE NANOPARTICLES SYNTHESIZED BY SOLOCHEMICAL PROCESS
Abstract ZnO-NPs can be obtained through various methods, resulting in nanoparticles with different size and morphology, which directly influences their antimicrobial potential. The objective of this work was to evaluate the antibacterial activity of ZnO-NPs obtained by a solochemical process against important human foodborne pathogens: Staphylococcus aureus
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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27. SYNTHESIS AND CHARACTERIZATION OF FRUCTOSYLTRANSFERASE FROM Aspergillus oryzae IPT-301 FOR HIGH FRUCTOOLIGOSACCHARIDES PRODUCTION
Abstract Fructooligosaccharides (FOS) are mainly produced by microbial fructosyltransferases (FTase, E.C.2.4.1.9), and Aspergillus oryzae IPT-301 has shown high fructosyl transferring and low hydrolytic activities, which leads to high FOS production yields, but the main operating parameters for its best performance have been scarcely studied. Thus, this work
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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28. EFFECTIVENESS OF PHOSPHORUS REMOVAL IN AN SBR USING CO-PRECIPITATION WITH FERRIC CHLORIDE, AND ITS EFFECTS ON MICROBIAL ACTIVITY
Abstract The present study evaluated the phosphorus removal in a Sequencing Batch Reactor (SBR - 2,500L) used to treat the wastewater from an office building in two steps: phase I-Enhanced biological phosphorus removal (EBPR) and phase II-co-precipitation using FeCl3 as precipitant. The raw sewage presented a high organic load variation ranging from 0.11 (ph
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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29. Soil Microbial Biomass as an Edge Effect Indicator in Semi-Deciduous Seasonal Forest Fragments
ABSTRACT This work had the objective to evaluate the activity and microbial biomass of the soil as an indicator of edge effect in Semi-Deciduous Seasonal Forest fragments. Three fragments of different sizes (small, medium and large) located in the Southwest region of Bahia state were evaluated, in which three sampling ranges were defined in each, and soil sa
Floresta Ambient.. Publicado em: 12/09/2019
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30. Effect of Bulgarian propolis on the oral microflora in adolescents with plaque-induced gingivitis
ABSTRACT We compared the effect of two therapeutic approaches (marketed toothpaste and addition of Bulgarian propolis extract to the toothpaste) on gingival inflammation, plaque formation and oral microbial flora on Bulgarian adolescents with moderate plaque-induced gingivitis. The participants were divided randomly into two groups of 35 students. The first
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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31. QUEIJO ARTESANAL PRODUZIDO NO SUL DO RIO GRANDE DO SUL: AVALIAÇÃO FÍSICO-QUÍMICA, MICROBIOLÓGICA E SUSCETIBILIDADE A ANTIMICROBIANOS DE ISOLADOS DE STAPHYLOCOCCUS COAGULASE POSITIVA
Resumo Objetivando o conhecimento do queijo colonial artesanal produzido na região Sul do Rio Grande do Sul, foram analisadas 30 amostras adquiridas no comércio local e feiras quanto às características físico-químicas, além das análises microbiológicas exigidas pela Agência Nacional de Vigilância Sanitária (ANVISA), isolamento de Yersinia enteroc
Ciênc. anim. bras.. Publicado em: 22/08/2019
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32. Inibição do crescimento de microrganismos patogênicos induzida por butenolídeos análogos aos cadiolídeos
The increasing number of antibiotic resistant microorganisms requires the development of new drugs. In this context, natural cadiolides are promising leads as they present potent antimicrobial activity and low cytotoxicity. In this work we report the synthesis of 21 new cadiolide analogues. The synthesis involved a Diels−Alder cycloaddition/ cycloreversion
Quím. Nova. Publicado em: 15/08/2019
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33. Effects of trees and nitrogen supply on the soil microbiological attributes on integrated crop-livestock systems
ABSTRACT The diversification of plants, as an association between trees and the warm-season grasses, supports soil biodiversity and thus, soil quality. However, based on the prevailing climatic conditions, management techniques employed and because of the several combinations possible in such associations, variations may be observed in this type of respons
Rev. Ceres. Publicado em: 12/08/2019
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34. Chemical attributes and microbial activity of soil cultivated with cassava under different cover crops
RESUMO O aporte de resíduos vegetais no solo proporcionado pelos sistemas conservacionistas de manejo aumenta a quantidade de substrato, altera a fertilidade e aumenta a atividade biológica do solo. O objetivo deste estudo foi avaliar a influencia dos sistemas de manejo nos atributos químicos e na atividade microbiana do solo sob cultivo de mandioca. Com
Rev. bras. eng. agríc. ambient.. Publicado em: 15/07/2019
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35. Does Crop-Livestock-Forest Systems Contribute to Soil Quality in Brazilian Savannas?
ABSTRACT In this paper we discuss the impact on conversion degraded pasture areas into an integrated crop, livestock and forest system (ICLFS). We collected 30 soil samples at 0-0.1 m depth in five agroforestry systems, degraded pasture and native areas along Brazilian Cerrado biome. We analyzed the influence of chemical variables on microbial biomass carbon
Floresta Ambient.. Publicado em: 01/07/2019
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36. Antibacterial and cytotoxicity activities and phytochemical analysis of three ornamental plants grown in Mexico
Abstract: This study evaluates the antibacterial, cytotoxic activities, and phytochemical composition, of Callistemon citrinus, Hibiscus rosa-sinensis and Plumbago auriculata leaves and flowers, three ornamental plants in Mexico. However, in other countries offers a range of other uses. Ethanol extracts of C. citrinus leaf and flower presented stronger antib
An. Acad. Bras. Ciênc.. Publicado em: 19/06/2019