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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://www.readbyqxmd.com/read/28793033/a-contribution-for-the-limnological-knowledge-of-basaltic-knickzones
#1
E M Brambilla, A M C Ruocco, M G Nogueira
The knickzones are defined as locally steep riverbed segments, such as a convex reach in a concave-up longitudinal profile. They are worldwide distributed and geologically well studied, but despite their distinctiveness as a particular kind of macrohabitat there is a notorious lack of ecological knowledge. In this context, this research proposal aims to provide a physical description, in terms of kind of habitats, and a limnological characterization of a basaltic knickzone. Information is based on a case study carried out in the Sapucaí-Mirim River, Southeast Brazil...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793032/protein-from-hevea-brasiliensis-hev-b-13-latex-attenuates-systemic-inflammatory-response-and-lung-lesions-in-rats-with-sepsis
#2
L A Araújo, P R Melo-Reis, F Mrue, C M Gomes, M A P Oliveira, H M Silva, M M Alves, N J Silva-Júnior
Sepsis induces a severe systemic inflammatory response that may result in multiple organ dysfunction and death. Studies using a protein derived from natural Hevea brasiliensis (rubber tree) latex, denominated Hev b 13, have demonstrated important anti-inflammatory effects, but no data have been published regarding its effects on sepsis. The aim of this study was to investigate the effects of Hev b 13 on the inflammatory response and lung lesions of septal rats. Male Wistar rats were submitted to cecal ligation and puncture (CLP), randomized into groups and treated with subcutaneously administered doses of 0...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793031/airborne-fungi-in-an-intensive-care-unit
#3
C L Gonçalves, F V Mota, G F Ferreira, J F Mendes, E C Pereira, C H Freitas, J N Vieira, J P Villarreal, P S Nascente
The presence of airborne fungi in Intensive Care Unit (ICUs) is associated with increased nosocomial infections. The aim of this study was the isolation and identification of airborne fungi presented in an ICU from the University Hospital of Pelotas - RS, with the attempt to know the place's environmental microbiota. 40 Petri plates with Sabouraud Dextrose Agar were exposed to an environment of an ICU, where samples were collected in strategic places during morning and afternoon periods for ten days. Seven fungi genera were identified: Penicillium spp...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793030/mosquito-species-occurrence-in-association-with-landscape-composition-in-green-urban-areas
#4
F R G Montagner, O S Silva, S M Jahnke
Aedes aegypti prefers densely populated habitats, but has been shown to explore less anthropogenic environments. We investigated composition of the abundance of mosquitoes in forested areas and assessed relationships between species occurrences and different types of land use and land cover at three spatial scales (100m, 500m and 1000m). Mosquitoes were collected from October 2012 to March 2013 using oviposition traps. We collected 4,179 mosquitoes in total including at least 10 species. Aedes albopictus and Limatus durhami were eudominant species, representing 90% of all collected individuals...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793029/chemical-composition-antimicrobial-and-antioxidant-potential-of-the-essential-oil-of-guarea-kunthiana-a-juss
#5
J A Pandini, F G S Pinto, M C Scur, C B Santana, W F Costa, L G Temponi
The essential oils are extracted from plant compounds and can present activities antimicrobial and antioxidant properties. The goals of the present study were: (a) to determine the chemical composition of the essential oil of Guarea kunthiana A. Juss using the method of gas chromatography coupled to mass spectrometry (GC-MS); (b) to evaluate the antimicrobial potential of this oil using the broth microdilution method against different microorganisms: five Gram-negative bacteria, four Gram-positive bacteria and a yeast and (c) to determine the antioxidant activity of the oil using the DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical assay...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28793028/alternative-food-sources-for-the-ladybird-brumoides-foudrasii-mulsant-coleoptera-coccinellidae
#6
M S de Lima, J W S Melo, R Barros
The predator Brumoides foudrasii (Mulsant) (Coleoptera, Coccinellidae) has been naturally found in plants infested by mealybugs. In this study, the striped mealybug Ferrisia dasylirii (Cockerell) (Hemiptera, Pseudococcidae) and Anagasta kuehniella Zeller (Lepidoptera, Pyralidae) eggs were evaluated as diets for the development and reproduction of B. foudrasii. Brumoides foudrasii immatures developed faster when fed with A. kuehniella eggs than when fed with F. dasylirii. However, the survival and longevity of B...
July 27, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699970/reduction-of-doxorubicin-induced-genotoxicity-by-handroanthus-impetiginosus-in-mouse-bone-marrow-revealed-by-micronucleus-assay
#7
M F G Boriollo, T A Silva, M F Rodrigues-Netto, J J Silva, M B Marques, C T S Dias, J F Höfling, M C C Resck, N M S Oliveira
Handroanthus impetiginosus has long been used in traditional medicine and various studies have determined the presence of bioactive chemical compounds and potential phytotherapeutics. In this study, the genotoxicity of the lyophilized tincture of H. impetiginosus bark (THI) was evaluated in mouse bone marrow using micronucleus assays. The interaction between THI and genotoxic effects induced by the chemotherapeutic agent, doxorubicin (DXR), was also analyzed. Experimental groups were evaluated 24 to 48 h after treatment with N-nitroso-N-ethylurea (NEU; 50 mg/kg), DXR (5 mg/kg), sodium chloride (NaCl; 150 mM), and THI (0...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699969/the-effect-of-size-and-density-on-nut-removal-in-syagrus-loefgrenii-glassman-arecaceae-in-the-brazilian-cerrado
#8
J Ragusa-Netto
In this study I tested the effect of Syagrus loefgrenii nut size and number on the intensity of removal by rodents across seasons. Trials were performed in which piles of either small or large endocarps (1, 3, 6, 12, and 25) were subjected to removal by rodents in the Cerrado (Brazilian savanna). Despite of variations in the intensity of removal, always this process decrease conform endocarp number. Also, mean proportion of endocarp removal was unrelated to year period, initial number, and size of endocarps...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699968/phytochemistry-antioxidant-potential-and-antifungal-of-byrsonima-crassifolia-on-soil-phytopathogen-control
#9
B S Andrade, R Matias, B O Corrêa, A K M Oliveira, D G F Guidolin, A R Roel
The use of chemical defensives to control fungal diseases has by consequence to impact negatively over the environment and human health, this way, the use of plant extracts with antifungal properties along with proper cultural management makes viable an alternative plant production control, specially for familiar and organic cultures. The objective of this study was to perform phytochemical and antioxidant analysis of Byrsonima crassifolia (canjiqueira) barks and evaluate its antifungal potential over Fusarium solani and Sclerotinia sclerotiorum mycelial growth...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699967/accumulation-of-copper-by-the-aquatic-macrophyte-salvinia-biloba-raddi-salviniaceae
#10
F Freitas, S Lunardi, L B Souza, J S C von der Osten, R Arruda, R L T Andrade, L D Battirola
Aquatic macrophytes have properties and mechanisms which are useful for the removal of substances in solution, commonly used in phytoremediation processes in aquatic environments. This study evaluated the performance of copper (Cu) accumulation by Salvinia biloba Raddi (Salviniaceae) in different metal concentrations (1, 3 and 5 µg mL-1), as well as the control treatment, measured at intervals of 0, 7 and 14 days under laboratory conditions, with control as to pH and luminosity. After the experiment, the S...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699966/proteomic-profile-of-piper-tuberculatum-piperaceae
#11
F Cotinguiba, S N López, I G F Budzinski, C A Labate, M J Kato, M Furlan
Piper tuberculatum (Piperaceae) is a species that accumulates especially amides as secondary metabolites and several biological activities was previously reported. In this article, we report a proteomic study of P. tuberculatum. Bidimensional electrophoresis (2D SDS-PAGE) and mass spectrometry (ESI-Q-TOF) were used in this study. Over a hundred spots and various peptides were identified in this species and the putative functions of these peptides related to defense mechanism as biotic and abiotic stress were assigned...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699965/bacterial-degradation-of-dissolved-organic-matter-released-by-planktothrix-agardhii-cyanobacteria
#12
L P Tessarolli, I L Bagatini, I Bianchini-Jr, A A H Vieira
Although Planktothrix agardhii often produces toxic blooms in eutrophic water bodies around the world, little is known about the fate of the organic matter released by these abundant Cyanobacteria. Thus, this study focused in estimating the bacterial consumption of the DOC and DON (dissolved organic carbon and dissolved organic nitrogen, respectively) produced by axenic P. agardhii cultures and identifying some of the bacterial OTUs (operational taxonomic units) involved in the process. Both P. agardhii and bacterial inocula were sampled from the eutrophic Barra Bonita Reservoir (SP, Brazil)...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699964/antifungal-susceptibility-profile-of-diferent-yeasts-isolates-from-wild-animals-cow-s-milk-with-subclinical-mastitis-and-hospital-environment
#13
J F Mendes, C L Gonçalves, G F Ferreira, I A Esteves, C H Freitas, J P V Villarreal, J R B Mello, M C A Meireles, P S Nascente
Yeast infections have acquired great importance due to increasing frequency in immunocompromised patients or patients undergoing invasive diagnostic and therapeutic techniques, and also because of its high morbidity and mortality. At the same time, it has been seen an increase in the emergence of new pathogenic species difficult to diagnose and treat. The aim of this study was to determine the in vitro susceptibility of 89 yeasts from different sources against the antifungals amphotericin B, voriconazole, fluconazole and flucytosine, using the VITEK® 2 Compact system...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28699963/nitrogen-and-phosphorus-flux-from-the-production-of-nile-tilapia-through-the-application-of-environmental-indicators
#14
J A S Osti, M A B Moraes, C F Carmo, C T J Mercante
We aimed in this study utilize environmental indicators as a quantitative method to evaluate and discuss the nitrogen (TN) and phosphorus (TP) flux by a production stage grow-out (termination) of Nile tilapia (Oreochromis niloticus) in fishpond. The TN and TP load, the mass balance, the input of TN and TP via feed and the converted nutrients in fish biomass are the environmental indicators applied in this study. During the production cycle (128 days), the system exported 15,931 g TN and 4,189 g TP that were related to the amount of feed supplied (r Pearson = 0...
July 10, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28678977/distribution-and-density-of-the-bivalve-anomalocardia-brasiliana-in-the-estuarine-region-of-northeastern-brazil
#15
A M L Rodrigues Maia, E Medeiros, G G Henry-Silva
The objective of this study was to analyze the density and distribution of the bivalve Anomalocardia brasiliana in beaches in the estuarine region of the semiarid in Rio Grande do Norte State, Barra and Pernambuquinho (04°56.978'S and 37°08.961'W and 04°56.792'S and 37°09.375'W, respectively). Samples were collected monthly during 37 months using five transects (300 m long and 400 m apart) laid perpendicularly to the beach line toward the sea. Seven collection points, 50 m apart, were set in each transect, and shellfish and sediment samples were collected...
June 26, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28658392/maize-plants-produce-direct-resistance-elicited-by-tetranychus-urticae-koch-acari-tetranychidae
#16
P D Paulo, C G Lima, A B Dominiquini, M A M Fadini, S M Mendes, C G S Marinho
Plants can be attacked by a wide variety of herbivores. Thus, developing protective mechanisms for resistance against these agents is an advantage for survival and reproduction. Over the course of evolution, many resistance mechanisms against herbivory have been developed by the plants. Induced direct and indirect resistance mechanisms can manifest in plants after herbivore attack. The two-spotted spider mite Tetranychus urticae is not a pest of maize crops (Zea mays), despite being reported infesting plants that may have resistances against this herbivore...
June 26, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28658391/escherichia-coli-is-not-a-suitable-fecal-indicator-to-assess-water-fecal-contamination-by-otters
#17
M Oliveira, D Freire, N M Pedroso
The detection of pathogenic microorganisms in aquatic environments is extremely relevant in terms of public health. As these laboratorial methodologies are usually difficult, expensive and time-consuming, they are frequently replaced by the assessment of fecal indicator bacteria, such as Escherichia coli. This study aimed to assess the presence of E. coli in fecal samples from Neotropical otters, to evaluate its potential as fecal indicator to be applied to the determination of water microbiological quality in areas where otters' populations are high...
June 26, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28658390/foliar-phenolic-compounds-of-ten-wild-species-of-verbenacea-as-antioxidants-and-specific-chemomarkers
#18
J A Ávila-Reyes, N Almaraz-Abarca, A I Chaidez-Ayala, D Ramírez-Noya, E A Delgado-Alvarado, R Torres-Ricario, N Naranjo-Jiménez, R E Alanís-Bañuelos
The family Verbenaceae hosts important species used in traditional medicine of many countries. The taxonomic controversies concerning the specific delimitation of several of its species make it difficult to guarantee the botanical origin of herbal preparations based on species of this family. To contribute to the development of both specific chemomarkers and a quality control tool to authenticate the botanical origin of herbal preparations of Verbenacea species, we determined the foliar HPLC-DAD phenolic profiles and the antioxidant properties of 10 wild species of this family occurring in Mexico...
June 26, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28658389/cry-protein-in-the-predatory-mite-neoseiulus-californicus-and-spider-mite-tetranychus-urticae-prey-fed-with-transgenic-maize
#19
P D Paulo, M A M Fadini, A B Dominiquini, S M Mendes, C G S Marinho
No abstract text is available yet for this article.
June 26, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28658388/aquatic-macrophyte-mats-as-dispersers-of-one-invasive-plant-species
#20
T S Michelan, M S Dainez, S M Thomaz
No abstract text is available yet for this article.
June 26, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
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