Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Rodrigo Studart Corrêa,Benício de Melo Filho,Gustavo Macedo de Mello Baptista
CERNE , 2007,
Abstract: Approximately 0.6% of the Brazilian Federal District′s territory have been degraded by mining. The evaluation of plantsuccession on such sites can be a useful tool to define strategies for reclamation. Thus, woody species of fifteen exploited sites,abandoned to succession for 20 - 47 years, were surveyed. All woody plants present on the sites were identified and counted for theevaluation of frequency, density and dominance of plant species naturally established on the mined spoils. Results show a plant densitybelow 5% and a species density below 15% compared to values measured in native areas. Ten out 98 species found on the mined areasaccounted for 52.9% of woody plants dominance. Capacity of re-growing from roots of some Savanna species is shaping thecommunities and the succession on exploited sites. About of native species found on the mined areas are able to re-grow from roots,and they made up to 89% of dominance and 96% of plant s density. Results point out to the need of boosting ecological successionthrough revegetation works on mined areas in the Brazilian Federal District.
Estimating cocaine consumption in the Brazilian Federal District (FD) by sewage analysis
Maldaner, Adriano O.;Schmidt, Luciana L.;Locatelli, Marco A. F.;Jardim, Wilson F.;Sodré, Fernando F.;Almeida, Fernanda V.;Pereira, Carlos Eduardo B.;Silva, Cristiano M.;
Journal of the Brazilian Chemical Society , 2012, DOI: 10.1590/S0103-50532012000500011
Abstract: this is the first report on the occurrence of cocaine (coc) and benzoylecgonine (be) residues in six samples collected from different wastewater treatment plants (wtp) located in the brazilian federal district (fd). concentrations of be in the influent sewage were used to calculate cocaine consumption (kg year-1 per 1000 inhabitants) for each region attended by the wtp from two sampling campaigns (march and june, 2010). among the wtp studied, samples from samambaia showed higher concentrations (from 3866 to 2477 ng l-1 of be and 805 to 579 ng l-1 of coc) and doses per inhabitants (more than 13 doses inhabitant-1 per year). the extrapolation to the whole fd population points out to an annual consumption reaching 1.0 ton of free base cocaine, or 1.1 tons of cocaine hydrochloride. the work also addresses the influence of the cocaine presentation form (free base or hydrochloride) and the integration with chemical profiling results in a more realistic estimate, mainly concerning the viewpoints of forensics and law enforcement.
Raquel álvares Le?o,Mariana Martins Medeiros,Rodrigo ávila de Paula,Rodrigo Studart Corrêa
Revista Sociedade & Natureza , 2005,
Abstract: Mining activities for urbanization purposes have been practiced in the BrazilianFederal District for the last fifty years. Exploitation of sand, clay, stones, calcareous rocks,and gravel deposits resulted in 0.6% of the territory degraded by mining. Deposits explored inthe last ten years have been reclaimed as demanded by local laws.The natural restoration of areas degraded by mining explotation is unpraticable,because the seed-bed and seedlings-bed is very injuried. Also the superficial layers of soil aretaken off, causing loss of microorganism like fungi, which contributes for environmental’squality improvement for the vegetation reestablishment (Vargas & Hungria, 1997).Fortunatelly, environmental laws oblige miners to replace these superficial layers of soil(CREA-DF Cursos, 2004).The recovering of a degradaded area doesn’t necessarily mean restoration. Restorationonly happens when the damage is minimal, for example, a glade opened by the death of a tree(Fonseca et al., 2001). When an area is hardly damaged, the vegetal climax community,resulting from secondary succession, will never be the same as the one standed there before(CREA-DF Cursos, 2004; Fonseca et al., 2001). In the case of areas degraded by mining,human intervention is necessary, because the vegetation has lost its resilience, and is not ableto commence a secondary succession by itself.
How many species of cladocerans (Crustacea, Branchiopoda) are found in Brazilian Federal District? Quantas espécies de cladóceros (Crustacea, Branchiopoda) s o encontradas no Distrito Federal?  [cached]
Francisco Diogo Rocha Sousa,Lourdes Maria Abdu Elmoor-Loureiro
Acta Limnologica Brasiliensia , 2012,
Abstract: AIM: This study aimed provides a checklist of cladocerans and also an evaluation of richness and species composition in the Federal District, Brazil. METHODS: Checklist of cladocerans was obtained evaluating data from the literature, from taxonomic collection (Elmoor-Loureiro's collection) and from fauna surveys conducted over more than three decades in different types of aquatic environments. RESULTS: The 57 water bodies studied showed 56 species, of which 14 are new records. The number of species contained in the list displayed corresponds to 85% of what was expected for richness estimators. The highest number of species was observed in the lentic water bodies (52), which also presented the specific composition of fauna (R = 0.110; p = 0.016), possibly because there were samples taken among the aquatic vegetation. According to our understanding, some species may be subject to local extinctions because they inhabit water bodies located exclusively in urban areas, which can lead to a decline in richness. CONCLUSION: Thus, the results of this study can assist in monitoring aquatic environments and in selection of new areas for surveys of cladocerans in the Federal District. OBJETIVO: Este estudo objetivou fornecer uma checklist de cladóceros e também uma avalia o da riqueza e composi o de espécies no Distrito Federal, Brasil. MéTODOS: A checklist de cladóceros foi obtida utilizando dados encontrados na literatura, dados de cole o (cole o de Elmoor-Loureiro) e dados de levantamentos faunísticos realizados por mais de três décadas em diferentes tipos de ambientes aquáticos. RESULTADOS: Os 57 corpos d'água avaliados apresentaram 56 espécies das quais 14 s o novos registros. O número de espécies contido na lista apresentada corresponde a 85% do esperado por estimadores de riqueza. O maior número de espécies foi observado no conjunto de corpos d'água lênticos (52), que também apresentou composi o específica de fauna (R = 0.110; p = 0.016), possivelmente, por amostragens realizadas entre a vegeta o aquática. Segundo nosso entendimento, algumas espécies podem estar sujeitas a extin es locais por habitarem corpos d'água localizados exclusivamente em áreas urbanas, o que pode levar ao declínio da riqueza. CONCLUS O: Desta maneira, os resultados deste estudo podem auxiliar no monitoramento de ambientes aquáticos e na sele o de novas áreas para levantamentos da fauna de cladóceros no Distrito Federal.
Infant mortality in the Federal District, Brazil: time trend and socioeconomic inequalities
Monteiro, Renata Alves;Schmitz, Bethsáida de Abreu Soares;
Cadernos de Saúde Pública , 2007, DOI: 10.1590/S0102-311X2007000400004
Abstract: this study examined the trend in the infant mortality rate in the federal district of brazil (or greater metropolitan brasilia, the national capital) from 1990 to 2000, analyzing the rate according to 5 administrative areas stratified by mean family income, from 1996 to 2000. an ecological time-series study was conducted using the information systems on live births and mortality, produced by the brazilian ministry of health. the infant mortality rate (imr) decreased by 45.2% from 1990 to 2000, from 26.3 per 1000 live births to 14.4, or a mean annual reduction of 5.34% (r2 = 0.9397; p < 0.0001). during this period there was a higher proportion of neonatal deaths. however, a higher percentage change occurred in the post-neonatal period (-59.0%, r2 = 0.8452, p < 0.0001). investigation of the imr in the various areas of the federal district showed a reduction in differences among the regions with respect to the component rates; however, substantial disparities persisted in relation to the income variable. the results suggest the need for effective interventions in the determinants of neonatal and post-neonatal mortality in order to improve maternal and infant health in all socioeconomic groups in the federal district.
Leishmania (Viannia) braziliensis is the main species causing cutaneous leishmaniasis in the Federal District of Brazil
Santos, GM;Kückelhaus, SA;Roselino, AM;Chaer, WK;Sampaio, RNR;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2012, DOI: 10.1590/S1678-91992012000300012
Abstract: the first autochthonous case of american cutaneous leishmaniasis was reported in the federal district in 1980, and the species involved in this type of leishmaniasis was unknown. this study aimed to identify the species that causes the disease in the federal district and to investigate its clinical and epidemiological aspects. between 2000 and 2007, 71 autochthonous cases of leishmaniasis were reported in the federal district. leishmania species were identified by means of direct immunofluorescence reactions using monoclonal antibodies and restriction fragment length polymorphism. the species of 40 (56.33%) out of 71 samples were identified. thirty-six (90%) were identified as leishmania (viannia) braziliensis and four (10%) were identified as leishmania (leishmania) amazonensis. in this area, the disease had clinical and epidemiological characteristics similar to those found in other brazilian regions.
Prácticas alimentarias y razones para cambios en la alimentación de la población adulta de Brasilia Food intake habits and reasons for behavioral changes in Brazilian adult population in Brasilia, federal district
Maria Cristina Sebba Marinho,Edgar Merchán-Hamann,Ana Carolina da Cunha Floresta
Revista Cubana de Salud Pública , 2005,
Abstract: Este estudio transversal tuvo como objetivo conocer las prácticas y cambios alimentarios en la población del Distrito Federal (DF) así como sus determinantes. Se utilizó una muestra aleatoria de 500 participantes con más de 15 a os para la realización de entrevistas domiciliarias en el plano piloto (área central), 6 ciudades satélites y en una invasión irregular (Vila Estructural). En los domicilios, fue sorteada una persona con más de 15 a os. Entre los entrevistados, predominó el sexo femenino (64,4 %). La edad promedio fue de 35 a os (mediana = 31); los que estudiaron la primaria completa representan un 39 % y los de nivel universitario el 24,8 %. El 39 % ganan hasta 4 salarios mínimos. Predominó el consumo diario de arroz, fríjol, pan, frutas, legumbres y verduras. El consumo diario de carne bovina fue de 11,6 %. El 37 % relatan cambios alimentarios, y entre ellos, el 32,6 % lo atribuyeron a la pérdida de peso, el 25,4 % a la preocupación con la salud y el 20 % a la reeducación alimentaria. El salario y la escolaridad estuvieron asociados a cambios alimentarios This cross-sectional study was aimed at assessing food-intake patterns in the population of the Brasilia, federal district, as well as their determinants. A random sample of 500 participants aged over 15 years was used to make household-based interviews in such places as Plano Piloto (central Brasilia), six peripheral cities and a temporary slum (Vila Estructural). An over 15 years-old person was randomly selected in each household. Among the interviewed persons, females were predominant (64.4%); average age was 35 years (median=31); those who finished elementary school accounted for 39% and those who had university degree represented 24.8% of the total. 39% earned up to 4 minimal salaries. Daily food preferences were rice, beans, bread, fruits and vegetables. Bovine meat was eaten daily by 11,6%. 37% of individuals stated recent food intake changes; the main reason for this in 32.6% of them was loss of weight, in 25,4% was concern about their health status and in 20% was food-intake re-education. Salary and schooling were associated to food-intake changes
Fiscal reform and federal relations: Brazilian deadlocks
Aguirre, Basilia Maria Baptista;Dias, Guilherme Leite da Silva;
Revista de Economia Política , 2009, DOI: 10.1590/S0101-31572009000100003
Abstract: brazilian fiscal reform got to deadlocks because proposals tried to avoid considering federal relations. there are two main types of federal relations: the competitive and the cooperative. in both types is possible to observe coordination mechanisms. brazilian federalism is a mixture of both types what leads to difficulties finding solutions. we argue that is more important to find mechanisms to facilitate cooperation than to discuss the qualities of any alternative fiscal structure. fiscal reforms brings along a great deal of uncertainty. so it is important to discuss the reform timing and the compensation mechanisms before hand.
Globalization and the Political Economy of the Brazilian Federal University
Joao dos Reis Silva Júnior, Eric K. Spears, Alan Victor Pimenta
Open Access Library Journal (OALib Journal) , 2014, DOI: 10.4236/oalib.1100776
Abstract: The purpose of this research is to explain how Brazilian higher education becomes a commodity of global capitalism through a focus on institutional culture change, which transforms academic independence toward a model of corporate-sponsored applied research. Brazilian federal universities are invested in S.T.E.M. education and are instruments in the country’s twenty-first century hegemonic aspirations. This national development strategy has ramifications for the humanities, fine arts, and social sciences. Applied science and public-private partnerships (PPP) have irreversibly changed the trajectory of the Brazilian public university and its relationship to global capitalism. This research examines these changes to higher education and Brasília’s broader political agenda through a critical political economy perspective.
Identification and rearing of four thrips species vectors of Tospovirus in the Federal District, Brazil
Nagata, Tatsuya;Mound, Laurence A.;Fran?a, Felix H.;ávila, Antonio C. de;
Anais da Sociedade Entomológica do Brasil , 1999, DOI: 10.1590/S0301-80591999000300022
Abstract: the disease caused by the viruses belonging to the genus tospovirus is a serious problem in horticultural and ornamental crops in brazil. in the field, this virus group is transmitted by the insect vector, thrips. little is known about the thrips species occurring in brazil, and which species are important for the dissemination of these diseases. for the study of epidemiology of this virus group, different thrips populations, which may have the capacity to be vectors of tospoviruses, were collected in the federal district. four species were identified: frankliniella occidentalis pergande, f. schultzei trybom, thrips palmi karny and t. tabaci lindeman. this is the first report of the occurrence of f. occidentalis and t. palmi in the federal district. a methodology for the rearing of these four thrips is described in this report.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.