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Search Results: 1 - 10 of 2116 matches for " Dione Mari;Yabroudi "
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Aplica??o de processos físico-químicos como alternativa de pré e pós-tratamento de lixiviados de aterros sanitários
Queiroz, Luciano Matos;Amaral, Mailer Sene;Morita, Dione Mari;Yabroudi, Suher Carolina;Sobrinho, Pedro Alem;
Engenharia Sanitaria e Ambiental , 2011, DOI: 10.1590/S1413-41522011000400012
Abstract: the aim of this article was evaluate the implementation of the ammonia stripping as a pretreatment for landfill leachate and the use of the coagulation-flocculation-sedimentation process for the removal of refractory organic compounds present in a landfill leachate pretreated in an activated sludge system. the rates of ammonia nitrogen removal ranged between 3.5 and 3.6 mg nh3-n.l-1.h-1in a lab scale reactor (working volume of 20 l) equipped with a mechanical stirrer and 3.2 and 3.3 mg nh3-n.l-1.h-1in a lab scale aerated column (working volume of 10 l). it was possible to achieve removals above 90% of refractory organic compounds (measured as apparent color) applied coagulant dosage about 400 mg fe+3.l-1 and 400 mg al+3.l-1.
Tratabilidade de solos tropicais contaminados por resíduos da indústria de revestimentos ceramicos
Oliveira, Luciana Pena de;Morita, Dione Mari;
Engenharia Sanitaria e Ambiental , 2008, DOI: 10.1590/S1413-41522008000100013
Abstract: the aim of this research was to evaluate different leaching processes to the removal of lead (pb) and zinc (zn) from tropical soil contaminated by inappropriate past deposition of wastes from ceramic tile industries of santa gertrudes (s?o paulo, brazil). three soil washing processes were investigated: with concentrated sulphuric acid, with a 30% solution of hydrogen peroxide and with 0.1m solution of hydrochloric acid. the results indicated that the treatment with hydrogen peroxide did not remove pb and zn significantly; the washing with concentrated sulphuric acid caused a 50% reduction of zn contents and the 0.1m solution of hydrochloric acid reduced pb and zn contents in 15% and 10%, respectively. the zn content remaining in the soil processed with concentrated sulphuric acid was 117 mg/kg and the pb and zn contents remaining in the soil processed with 0.1m solution of hydrochloric acid were 806 mgpb/kg and 213 mgzn/kg, respectively, values which are lower than intervention ones established by s?o paulo state environmental protection agency.
Avalia??o da eficácia dos critérios de recebimento de efluentes n?o domésticos em sistemas de coleta e transporte de esgotos sanitários em S?o Paulo
Delatorre Junior, Irineu;Morita, Dione Mari;
Engenharia Sanitaria e Ambiental , 2007, DOI: 10.1590/S1413-41522007000100008
Abstract: in this research work, some characteristics of non-household effluents which are conveyed into the sanitary sewerage system of s?o paulo?s metropolitan region (spmr?s sewerage system) were correlated to maintenance data. measurements of inferior limit of explosion and sulfide concentrations in the sewage mains and interceptor lines were also conducted. the results led us to conclude that the current non-domestic effluent collection criteria in spmr?s severage system are not effective with regard to physical and operational interferences. auxiliary products, raw materials and the production process flux itself must be taken into consideration in the analysis made to evaluate whether or not such effluents can be conveyed into the severage system. there must be communication among the sectors involved in the operation of spmr?s sewerage system and the responsible sewerage company in charge should monitor the inferior limit of explosion at all times.
Biodegrada??o de alcoóis, ftalatos e adipatos em um solo tropical contaminado
Ferreira, Ieda Domingues;Morita, Dione Mari;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000800013
Abstract: the adipic and phthalic acid esters are plasticizers, have low water solubility, high partition octanol/water coefficients (kow) and accumulate in soil and sediments. these compounds are considered teratogenic, carcinogenic and endocrine disruptors chemicals. this study evaluated the bioremediation of tropical soil contaminated with plasticizers process wastes, in aerobic conditions, with and without introduction of acclimated bacteria. it was selected 200 kg of contaminated tropical soil for the biodegradation study. the plasticizers concentrations in soil ranged between 153 mgdoa/kg up to 15552 mgdidp/kg and after 90 days of biodegradation, the lower removal efficiencies were 72% with a 1-2 log simultaneous bacterial growth.
Biorremedia??o de solo contaminado por isobutanol, Bis-2-etil-hexilftalato e Di-isodecilftalato
Ferreira, Ieda Domingues;Morita, Dione Mari;
Revista Brasileira de Ciência do Solo , 2012, DOI: 10.1590/S0100-06832012000200033
Abstract: although phthalates are among the most common pollutants found in the environment, there are little data about bioremediation of tropical soils contaminated with phthalates. for this reason, the purpose of this study was to evaluate the bioremediation of an industrially used soil contaminated with di-(2-ethylhexyl) phthalate (dehp), diisodecyl phthalate (didp) and isobutanol, in s?o paulo state. the bioremediation was based on indigenous soil microorganisms and inoculum adapted in a slurry phase reactor. the reactor was monitored for 120 days and the moisture content adjusted. the results showed that biodegradation of phthalates followed first-order kinetics, and bioremediation occurred in a ph range of 7.4 to 8.4, at temperatures from 17 to 25 oc and the phthalate removal efficiency was above 70 %. the final dehp concentration was below 4.0 mg kg-1 dry soil, which is the threshold established by brazilian law, for soil in residential areas.
Viabilidade da aplica??o do método respirométrico de Bartha para determina??o da biodegrada??o de poluentes ou resíduos em latossolos
Mello, Gabriela Sá Leit?o de;Morita, Dione Mari;Manfredini, Sidneide;Rivera, Irma Nelly Gutierrez;
Engenharia Sanitaria e Ambiental , 2007, DOI: 10.1590/S1413-41522007000100009
Abstract: one of the major parameters that influence the feasibility of using bioremediation in contaminated sites is the biodegradability of the compounds of concern. the bartha's respirometric method, adapted from a dutch norm, is a common method used in brazil to determine such biodegradability. however, tropical soils present different characteristics as compared to soils from regions of temperate climate. in this research, its applicability was studied for a latosoil, which is the predominant soil type in s?o paulo state, brazil. based on the results of this study, it can be concluded that abiotic reactions in latosoil generated carbonic gas in significant concentrations. furthermore, this research verified the difficulty of sterilizing the soil, which would make it difficult to evaluate the removal of contaminants by other mechanisms or the biodegradation by exogenous microorganisms. therefore, the application of bartha?s respirometric method is not recommended to determine the biodegradability of pollutants in latosoils.
Epidemiology of Non-Typhoidal Salmonella (NTS) in Humans and Animals in the Gambia and Senegal
Dione, M.
Tropicultura , 2010,
Abstract: Non-Typhoidal Salmonella (NTS) species are important food-borne pathogens. Although acute gastroenteritis is the most common clinical symptom, complications can occur resulting in bacteraemia with or without focal infections. Food products, especially food of animal origin such as poultry are associated with the transmission to humans. In Africa, NTS are among the most common cause of bloodstream infections in children younger than 5 years. Epidemiological data on NTS are lacking in Africa both for human and animal infections. Therefore, a study providing a better understanding of the factors that lead to the emergence of NTS is a prerequisite for the design of improved intervention strategies to control these pathogens. The aim of this thesis was to study the epidemiology of NTS pathogens in humans and animals in The Gambia and Senegal. Chapter 1 reviews the current status of knowledge on NTS infections in Africa with focus on The Gambia and Senegal. It also provides the background against which these studies were conducted. Chapter 2 describes the prevalence of NTS along the poultry production chain in Casamance, Senegal. Fifty seven randomly selected broiler farms, 42 street restaurants and 285 chicken carcasses were studied. The following farm prevalences were reported: 35.1, 38.6 and 29.8% in chicken faeces, on carcass skin, and in muscles, respectively. NTS were found in chicken meat servings of 14.3% of the 42 street restaurants and in 40.4% of the 285 chicken carcasses examined. The most prevalent serotypes among the eighteen identified were Salmonella Brancaster (57.9%), Salmonella Goelzau (10.7%), Salmonella Kentucky (8.4%), and Salmonella Hadar (7.3%). The following serotypes were for the first time identified in Senegal: Salmonella Bandia, Salmonella Bessi, Salmonella Brunei, Salmonella Hull, Salmonella Istanbul, Salmonella Javiana, Salmonella Magherafelt, Salmonella Molade, Salmonella oxford, Salmonella Poona, Salmonella Rubislaw, Salmonella Tamale, Salmonella Zanzibar and Salmonella Goelzau. The prevalence of NTS on skin and in muscle was significantly associated with the detection of Salmonella in feces (P≤ 0.001). The high levels of contamination of skin and muscle can be attributed to poor hygiene at the farm level and the non-hygienic handling of chicken carcass meat during and after slaughtering. This conclusion is supported by the fact that some serotypes are present both on the farm (as found in feces) and in carcasses (on skin and meat). Food can also become contaminated through environmental contact, because hygienic measures appli
Tratamiento para la infección latente por tuberculosis en ni os: recomendaciones internacionales y para Colombia Latent Tuberculosis Infection Treatment in Children: international recommendation and to Colombia
Dione Benjumea
Infectio , 2012,
Abstract: Mediante una revisión narrativa de la literatura, se pretende discutir las recomendaciones vigentes para Colombia con relación al tratamiento para infección latente por tuberculosis (LTBI: latent tuberculosis infection), según las guías y hallazgos internacionales. Los ni os menores de 5 a os en contacto con pacientes con tuberculosis (TB) pulmonar bacilífera tienen un riesgo mayor de desarrollar TB. El tratamiento con isoniazida ha demostrado disminuir este riesgo y está indicado durante al menos 6 meses. Las guías para el tratamiento de LTBI de la Organización Mundial de la Salud y los Centros para el Control y la Prevención de Enfermedades indican tratamiento a menores de 5 a os en contacto con pacientes con TB pulmonar bacilífera, una vez se ha descartado TB activa, independientemente del estado de vacunación con bacilo de Calmette-Guérin. La norma colombiana considera, además de la vacuna bacilo de Calmette- Guérin, el resultado de la prueba de tuberculina. Existe el temor de la posible generación de cepas resistentes de Mycobacterium tuberculosis por el uso de monoterapia. Se recomienda el seguimiento estricto durante el tratamiento para mitigar la aparición de efectos adversos y de cepas resistentes. Los menores de 5 a os en contacto con pacientes con TB pulmonar bacilífera en Colombia deberían recibir tratamiento para LTBI con isoniazida, según los estándares internacionales de diagnóstico de la TB activa, y seguimiento del tratamiento para LTBI. By mean a narrative review of literature, it is pretended to discuss the actual Colombian recommendations in relation with latent tuberculosis infection (LTBI) treatment, according to international guidelines and findings. Children under 5 years old in contact with pulmonary tuberculosis (TB) patients have a greater risk to develop tuberculosis. Isoniazid treatment had demonstrated to diminish that risk, and it is indicated for at least 6 months. The WHO and CDC guidelines for LTBI treatment indicate treatment to under 5 years old children in contact with bacilliferous pulmonary TB patients, once has been discarded active TB, regardless the BCG vaccination state. The Colombian policy consider besides the vaccine BCG, the result of the tuberculin skin test. There is an pprehensiveness about the possibility of resistant strain generation of M. tuberculosis due to monotherapy use. During the treatment, it is recommended the strict follow-up, to mitigate the adverse effects and resistant strain appearance. Children under 5 years old in contact with bacilliferous pulmonary TB patients in Colombia should rece
Youth homicides and socio-spatial segregation in Londrina Homicídios de jovens e segrega o socioespacial em Londrina
Dione Lolis
Semina : Ciências Sociais e Humanas , 2010,
Abstract: O presente artigo analisa o quadro atual de violência homicida no País, bem como os fatores de risco e de vulnerabilidade de jovens residentes em Londrina (PR) a esse tipo de violência. Mostra também a incidência de mortes nos grupos jovens que residem em territórios de exclus o das capitais, das regi es metropolitanas e, num movimento mais recente, nas cidades do interior, como encontramos em Londrina. Além, disso, apresenta dados de pesquisa em que se avalia que a segrega o socioespacial e os tra os que assume na cidade s o os aspectos centrais de risco e de vulnerabilidade de jovens à violência homicida. E, nesse intrincado contexto social em que vivem os jovens que mais sofrem esse tipo de violência, os componentes simbólicos importam tanto quanto os aspectos objetivos para desvendar o lugar destinado ao jovem na agenda das políticas públicas. Esses aspectos podem contribuir para a formula o de propostas que visem à redu o dos níveis de morte violenta. This article examines the current state of murderous violence in the country, as well as risk factors and vulnerability of young people living in Londrina (PR) to this type of violence. The article also shows the incidence of deaths in younger age groups who live in areas of exclusion of the capitals, metropolitan areas and lately, in smaller cities, as found in Londrina. In addition, it presents research data showing that socio-spatial segregation and the features it introduces in the city are key aspects of risk and vulnerability of youth in homicidal violence. In this intricate social context in which young people who suffer the most with this type violence live, the symbolic components matter as much as the objective aspects to reveal the place destined for young people in the public policy agenda. These aspects may contribute to the formulation of proposals aimed at reducing levels of violent death.
Determination of an Equivalent Loading Circle Which May Represent the Loading of the Dual Wheels  [PDF]
Baye Birane Thiam, Fatou Samb, Adama Dione
Open Journal of Civil Engineering (OJCE) , 2018, DOI: 10.4236/ojce.2018.82018
Abstract: This work aims to look for a simplifying surface that can represent the effect of the dual wheels on the variation of the stress and deformation state prevailing during the passage of traffic loads. This was facilitated by the results of Thiam (2016) [4] obtained on the distribution of the vertical contact stress in the space described by the dual wheels. The analysis of the results of this study, on all the loading circles considered, shows that the radius loading circle equal to 0.181 m makes it possible to most probably represent the effect of the dual wheels. With this new surface, the effect of the dual wheels can be determined in 2D. The choice of this load is confirmed by a study in case of overload. Thus, the single axle with dual wheels is represented by a simplified diagram equipped on each side by a disk of radius 0.181 m. These results are obtained using a numerical simulation under Cast3M with a gravelly lateritic pavement.
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