Showing papers in "Brazilian Journal of Microbiology in 2012"

TL;DR: The major factors affecting the production of GABA by microbial fermentation are temperature, pH, fermentation time and different media additives, therefore, these factors are summarized to provide the most up-dated information for effective GABA synthesis.

TL;DR: The results showed that bacteria might be involved in developing microbial communities under salt stress and helpful in colonizing of bacterial strains to plant roots and soil particles and suggest the feasibility of using above strains in improving plant growth and soil fertility under salinity.

TL;DR: The results of this work indicate that the cultivar of the plant may contribute to the structure of the endophytic community associated with the common bean, and is the first report ofendophytic bacteria from the leaves of P. vulgaris cultivars.

TL;DR: It is concluded that these halophilic isolates are not only diverse in phylogeny but also in their enzyme characteristics and may be potentially useful for catalysis under harsh operational conditions encountered in industrial processes.

TL;DR: The industrial applications of thermophilic cellulases, their cost of production and challenges in cellulase research are discussed, especially in the area of improving process economics of enzyme production.

TL;DR: The results showed that, despite the ability of metal tolerant strains to survive and grow in the presence of these elements, the interactions with these metals may result in metabolic or phisiological changes in this group of bacteria.

TL;DR: Scanning Electronic Microscopy and infrared spectrum analyses showed that significant changes occurred in the structure of wheat straws after pretreatment, which is favorable for the hydrolysis and saccharification.

TL;DR: Twenty-seven thermophilic and thermotolerant fungal strains were isolated from soil, decaying organic matter and sugarcane piles based on their ability to grow at 45°C on medium containing corn straw and cardboard as carbon sources to study xylanase and cellulases under solid state fermentation (SSF).

TL;DR: It is demonstrated that Escherichia coli were more sensitive even though the essential oil exerted a satisfactory action in three cases, and clove essential oil can be considered as a potential antimicrobial agent for external use.

TL;DR: The present findings suggested the enzyme to be thermophilic alkaline lipase, which is stable in the pH range of 8–11 with 90% retention of activity at pH 11 and stable in acetone followed by ethanol.

TL;DR: How a combination of new molecular biology methods and isolation studies are being developed to monitor and conserve mangrove ecosystems and their associated microbial communities are having a global impact and it is hoped they will help to protect and re-establish mangroves ecosystems.

TL;DR: Antibiotic-resistance of the representative strain PY50 was assessed by the Kirby-Bauer disk diffusion method, and the results showed it was susceptible and moderately susceptible to 13 and 4 of the 21 antimicrobial agents tested.

TL;DR: In this article, the authors evaluated selected chemical and microbiological treatments for the conversion of certain local agro-industrial wastes (rice straw, corn stalks, sawdust, sugar beet waste and sugarcane bagasse) to ethanol.

TL;DR: Based on information available in the literature, studies that point to a negative effect of salinity increase on hydrocarbonoclastic activity while several others report an opposite tendency are presented.

TL;DR: The study demonstrates the pathogenic potential of Aeromonas, associated with ornamental fish culture systems suggesting the emerging threat to public health.

TL;DR: Results show that bioactive compounds and Tyrosol produced by D. helianthi have a biotechnological potential.

TL;DR: In vitro experiments showed that Trichoderma isolates can significantly inhibit mycelium growth of pathogen in vitro by producing volatile and nonvolatile metabolites and light microscopic observations showed no evidence of mycoparasitic behaviour of the tested isolates of Trichodma spp.

TL;DR: The results highlight the high genetic variability associated with Bradyrhizobium microsymbionts of a variety of legumes and the MLSA approach has proved to represent a rapid and reliable method to be employed in phylogenetic and taxonomic studies, speeding the identification of the still poorly known diversity of nitrogen-fixing rhizobia in the tropics.

TL;DR: This comprehensive analysis of QRDRs in gyrA and parC genes, covering commonly isolated Enterobacteriaceae in Brazil is the largest reported up to now.

TL;DR: With the aim of increasing the knowledge about endophytic fungi, a group of microorganisms with high biotechnological potential and a valuable source of useful metabolites, a survey in leaves of mangrove plants was performed at the Itamaracá Island, PE, Brazil.

TL;DR: In this paper, the effects of the active film on the spoilage, pathogenic microorganism counts, pH, and color of the refrigerated chicken breast cuts were analyzed.

TL;DR: In this paper, seven thermophilic strains of actinomycete were isolated from the mushroom compost and identified as novel species of Streptomyces through morphological characterization and 16S rRNA gene sequence.

TL;DR: Yeasts isolated from soil contaminated with petroleum oil hydrocarbons showed potential for the production of biosurfactants in conventional sources of carbon as well as in agroindustrial residue, especially in glycerol.

TL;DR: A state-of-the-art overview of these shrimp viruses, with emphasis on distribution, pathology, morphology, and genomic organization, in addition to current diagnostic methods and intervention practices are provided.

TL;DR: This study was designed to determine the ratio between the density of Escherichia coli and other Thermotolerant Coliforms (TtC) bacteria from freshwater samples collected for a two-year period of monitoring and pointed out that a mandatory standard of 1000 thermotolerant coliforms would correspond to 800 E. coli based standards will represent a major improvement for the monitoring of freshwater quality.

TL;DR: In this article, the authors assessed the activity of the lignocellulolytic enzymes produced by two P. ostreatus strains (PLO 2 and PLO 6).

TL;DR: A significant positive correlation between percentage growth inhibition of test fungus and lytic enzymes – (chitinase, β-1,3-glucanase and protease) in the culture medium of antagonist treatment established a relationship to inhibit growth of fungal pathogen by increasing the levels of these enzymes.

TL;DR: The study suggests a possible incorporation of effective phytochemicals in combination therapies for MRSA infections.

TL;DR: Results indicated that the higher levels of EPS were correlated with the level of cell growth when glucose concentration was studied, and these results are beneficial to further study for enhancing the production of Ganoderma lucidum polysaccharides in large scale commercialized production.

TL;DR: Diagnostic methods, such as in-house urease test, culture and Polymerase Chain Reaction (PCR), for the detection of H. pylori in gastric biopsy specimens of 144 dyspeptic patients were evaluated, showing that the combination of two or more methods may improve the accuracy of the H. Pylori detection.