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Search Results: 1 - 10 of 175177 matches for " Daniel F. Buss "
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Sustaining Life: How Human Health Depends on Biodiversity; Eric Chivian & Aaron Bernstein - DOI: 10.3395/reciis.v3i2.262en
Daniel F. Buss
RECIIS : Electronic Journal of Communication, Information & Innovation in Health , 2009,
Abstract:
Application of rapid bioassessment protocols (RBP) for benthic macroinvertebrates in Brazil: comparison between sampling techniques and mesh sizes
Buss, Daniel F.;Borges, Erika L.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000300007
Abstract: this study is part of the effort to test and to establish rapid bioassessment protocols (rbp) using benthic macroinvertebrates as indicators of the water quality of wadeable streams in south-east brazil. we compared the cost-effectiveness of sampling devices frequently used in rbps, surber and kick-net samplers, and of three mesh sizes (125, 250 and 500 μm). a total of 126,815 benthic macroinvertebrates were collected, representing 57 families. samples collected with kick method had significantly higher richness and bmwp scores in relation to surber, but no significant increase in the effort, measured by the necessary time to process samples. no significant differences were found between samplers considering the cost/effectiveness ratio. considering mesh sizes, significantly higher abundance and time for processing samples were necessary for finer meshes, but no significant difference were found considering taxa richness or bmwp scores. as a consequence, the 500 μm mesh had better cost/effectiveness ratios. therefore, we support the use of a kick-net with a mesh size of 500 μm for macroinvertebrate sampling in rbps using family level in streams of similar characteristics in brazil.
Leptospirosis: A Silent Epidemic Disease
Maria Cristina Schneider,Michel Jancloes,Daniel F. Buss,Sylvain Aldighieri,Eric Bertherat,Patricia Najera,Deise I. Galan,Kara Durski,Marcos A. Espinal
International Journal of Environmental Research and Public Health , 2013, DOI: 10.3390/ijerph10127229
Abstract: This special issue of International Journal of Environmental Research and Public Health is dedicated to leptospirosis, an endemic zoonotic disease that is a cause of many acute undifferentiated fevers, especially in tropical countries [1,2]. While it can be debated whether leptospirosis is an emerging disease, it is evident that it is becoming an emerging public health problem. It is recognized as a disease of epidemic potential that has a significant health impact in many parts of the world.
Bases conceituais para a aplica??o de biomonitoramento em programas de avalia??o da qualidade da água de rios
Buss, Daniel Forsin;Baptista, Darcílio Fernandes;Nessimian, Jorge Luiz;
Cadernos de Saúde Pública , 2003, DOI: 10.1590/S0102-311X2003000200013
Abstract: biomonitoring is defined as the systematic use of biological responses to assess environmental changes, usually anthropogenic impacts. in this article we present the conceptual basis and a brief history of biomonitoring as an assessment tool for environmental health. considering the drawbacks of physical and chemical parameters to assess environmental quality, we pinpoint the need to integrate these analyses with information provided by biological monitoring. the application of biomonitoring in brazil would help watershed managers and policy-makers to reduce costs, increase the efficiency of analyses, and simplify the results, allowing community participation through volunteer monitoring programs.
Bases conceituais para a aplica o de biomonitoramento em programas de avalia o da qualidade da água de rios
Buss Daniel Forsin,Baptista Darcílio Fernandes,Nessimian Jorge Luiz
Cadernos de Saúde Pública , 2003,
Abstract: Biomonitoramento pode ser definido como o uso sistemático das respostas de organismos vivos para avaliar as mudan as ocorridas no ambiente, geralmente causadas por a es antropogênicas. Neste artigo s o apresentadas as bases conceituais e um breve histórico da utiliza o do biomonitoramento como ferramenta de avalia o da saúde dos ecossistemas de rios. Busca ainda fornecer subsídios para uma análise integrada da qualidade da água, pois as metodologias tradicionais de avalia o, baseadas em características físicas, químicas e bacteriológicas, n o s o suficientes para atender aos usos múltiplos da água, sendo particularmente deficientes na avalia o da qualidade estética, de recrea o e ecológica do ambiente. Visando colaborar com os gestores de bacias hidrográficas, a aplica o do biomonitoramento no Brasil contribui para a redu o de custos, o aumento da eficiência de análise e a simplifica o dos resultados, permitindo a participa o comunitária por intermédio de grupos de voluntários.
Epidemiologic Investigation of Immune-Mediated Polyradiculoneuropathy among Abattoir Workers Exposed to Porcine Brain
Stacy M. Holzbauer,Aaron S. DeVries,James J. Sejvar,Christine H. Lees,Jennifer Adjemian,Jennifer H. McQuiston,Carlota Medus,Catherine A. Lexau,Julie R. Harris,Sergio E. Recuenco,Ermias D. Belay,James F. Howell,Bryan F. Buss,Mady Hornig,John D. Gibbins,Scott E. Brueck,Kirk E. Smith,Richard N. Danila,W. Ian Lipkin,Daniel H. Lachance,P. James. B. Dyck,Ruth Lynfield
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0009782
Abstract: In October 2007, a cluster of patients experiencing a novel polyradiculoneuropathy was identified at a pork abattoir (Plant A). Patients worked in the primary carcass processing area (warm room); the majority processed severed heads (head-table). An investigation was initiated to determine risk factors for illness.
A Comprehensive Look at LH72 in the Context of Supergiant Shell LMC-4
Knut A. G. Olsen,Sungeun Kim,Jeremy F. Buss
Physics , 2001, DOI: 10.1086/321092
Abstract: Stellar spectroscopy, UBV photometry, H$\alpha$ imaging, and analysis of data from the ATCA \ion{H}{1} survey of the LMC are combined in a study of the LMC OB association LH 72 and its surroundings. LH 72 lies on the rim of a previously identified \ion{H}{1} shell, SGS-14, and in the interior of LMC-4, one of the LMC's largest known supergiant shells. Our analysis of the \ion{H}{1} data finds that SGS-14 is expanding with velocity $v_{exp}\sim15$ km s$^{-1}$, giving it an expansion age of $\sim$15 Myr. Through the stellar spectroscopy and photometry, we find similar ages for the oldest stars of LH 72, $\sim15-$30 Myr. We confirm that LH 72 contains an age spread of $\sim15-$30 Myr, similar to the range in ages of stars derived for the entire surrounding supergiant shell. Combining analysis of the O and B stars with H$\alpha$ imaging of the \ion{H}{2} region DEM 228, we find that DEM 228 accounts for only 60% of the available ionizing Lyman continuum photons. Comparing the distribution of ionized gas with that of the \ion{H}{1}, we find that DEM 228 and LH 72 are offset by $\sim1-2\arcmin$ from the peak 21-cm emission, towards the interior of SGS-14. Taken together, these results imply that SGS-14 has cleared its interior of gas and triggered the formation of LH 72. On the basis of our results, we suggest that LMC-4 was not formed as unit but by overlapping shells such as SGS-14, and that LH 72 will evolve to produce a stellar arc similar to others seen within LMC-4.
Spatial and temporal organization of aquatic insects assemblages in the longitudinal gradient of a tropical river
BAPTISTA, D. F.;DORVILLé, L. F. M.;BUSS, D. F.;NESSIAMIAN, J. L.;
Revista Brasileira de Biologia , 2001, DOI: 10.1590/S0034-71082001000200012
Abstract: the distribution and abundance of aquatic insects were studied in the longitudinal gradient of the watershed of macaé river, a coastal atlantic forest river in south-eastern brazil. sampling stations were selected in the first, second, fourth, fifth, and sixth orders and sampled in april, july, and october 1995. this represented the end of the rainy season, the dry season, and the beginning of another rainy season, respectively. in each month four samples were collected using a surber sampler from each of the following substrates: sand, litter deposited in pool areas, litter in riffle areas, and stones. a total of 46,431 specimens of aquatic insects belonging to ten orders were obtained. the data were analyzed by the multivariate methodologies of correspondence analysis (ca) and cluster analysis (upgma) using the similarity index of morisita, for all three months. both showed a significant faunal disrupture in the river, which can be divided in two sections: the upper one, from first to fourth orders, and the lower section, including fifth and sixth orders. the same results were obtained with presence-absence matrices, using jaccard similarity index, showing that the changes are not only due to quantitative differences. a mantel test was used to compare the assemblage composition temporally and no difference was detected between the three months. moreover, a canonical correspondence analysis (cca) was applied to the data to check which of the 14 physical and chemical variables significantly explained macroinvertebrate community variation. the most significant variables were conductivity, cpom, and ph for the upper stations (1st, 2nd and 4th orders), and alkalinity, fpom, and hco3 for the lower stations (5th and 6th orders).
Diversity and habitat preference of aquatic insects along the longitudinal gradient of the Macaé River basin, Rio de Janeiro, Brazil
BAPTISTA, D. F.;BUSS, D. F.;DORVILLé, L. F. M.;NESSIMIAN, J. L.;
Revista Brasileira de Biologia , 2001, DOI: 10.1590/S0034-71082001000200007
Abstract: diversity and habitat preference of macroinvertebrates were studied in macaé river basin, rio de janeiro state, brazil, along its longitudinal gradient. we selected stream reaches corresponding to 1st, 2nd, 4th, 5th and 6th orders. a surber sampler was used to collect four macroinvertebrates samples of each substrate (sand, litter in pool areas, stones, and litter in riffle areas) during the three sampling periods, defined based on the rain regime: april (end of the rainy season), july (dry season), and october (beginning of the rainy season). we identified 46,431 specimens corresponding to 117 taxa. analysis of diversity numbers (both for family or genus level) indicated that all insect taxonomic orders had higher numbers on 2nd order stream reach, except for ephemeroptera, on 4th order. however when considering morph-species taxonomic level, the higher diversity number occurred on 4th order stream. the highest richness and diversity numbers were found at the dry season. considering habitat preference, both litter in pool areas and litter in riffle areas had the highest faunal richness.
Spatial and temporal organization of aquatic insects assemblages in the longitudinal gradient of a tropical river
BAPTISTA D. F.,DORVILLé L. F. M.,BUSS D. F.,NESSIAMIAN J. L.
Revista Brasileira de Biologia , 2001,
Abstract: The distribution and abundance of aquatic insects were studied in the longitudinal gradient of the watershed of Macaé River, a coastal Atlantic Forest river in South-eastern Brazil. Sampling stations were selected in the first, second, fourth, fifth, and sixth orders and sampled in April, July, and October 1995. This represented the end of the rainy season, the dry season, and the beginning of another rainy season, respectively. In each month four samples were collected using a Surber sampler from each of the following substrates: sand, litter deposited in pool areas, litter in riffle areas, and stones. A total of 46,431 specimens of aquatic insects belonging to ten orders were obtained. The data were analyzed by the multivariate methodologies of Correspondence Analysis (CA) and Cluster Analysis (UPGMA) using the similarity index of Morisita, for all three months. Both showed a significant faunal disrupture in the river, which can be divided in two sections: the upper one, from first to fourth orders, and the lower section, including fifth and sixth orders. The same results were obtained with presence-absence matrices, using Jaccard similarity index, showing that the changes are not only due to quantitative differences. A Mantel test was used to compare the assemblage composition temporally and no difference was detected between the three months. Moreover, a Canonical Correspondence Analysis (CCA) was applied to the data to check which of the 14 physical and chemical variables significantly explained macroinvertebrate community variation. The most significant variables were conductivity, CPOM, and pH for the upper stations (1st, 2nd and 4th orders), and alkalinity, FPOM, and HCO3 for the lower stations (5th and 6th orders).
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