Allium Cepa Test
Mostrando 25-36 de 40 artigos, teses e dissertações.
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25. Efeitos citotoxicos e genotoxicos no meristema radicular de Allium cepa exposta a agua do Rio Paraiba do Sul - estado de São Paulo - regiões de Tremembe e Aparecida / Citotoxic and genotoxic effects in the root meristem of Allium cepa exposed to the water of the Paraiba do Sul river - São Paulo state - regions of Tremembe and Aparecida
One of the main sources of pollution of fresh water ecosystems refers to the discharge of industrial and urban wastes. Untreated sewage is considered an important cause to the deterioration of water quality in developing countries. Environmental pollutants have caused a decrease in water quality, inducing harmful effects in organisms which are in direct or i
Publicado em: 2009
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26. Análise da genotoxicidade das águas da Lagoa da Extremoz - RN
The contamination of the waters resources for wastewater from industrial, agricultural, and domestic sources is a serious environment problem, compromising its use for human consumption and agriculture. The Extremoz-RN Lake is an important freshwater source for the supply of the city of Natal, supplying a population of approximately 160,000 habitants. This a
Publicado em: 2008
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27. Ecotoxicologia de um sistema florestal de eucalipto tratado com lodo de esgoto / Ecotoxicology of eucalyptus forest system treated with sewage sludge
The application of sewage sludge in forest systems quests the improvement of the production, favoring the physical, chemistries and biological characteristics of the soil and of the plants. However, the sludge can contain pathogen and, organic and inorganic toxics elements, and the effect of these pollutants in the soil and in the plant is still unknown. It
Publicado em: 2008
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28. Cytotoxic and genotoxic potential of surface water from the Pitimbu river, northeastern/RN Brazil
In this study, the onion (Allium cepa) root test was used to evaluate the genotoxicity of the Pitimbu River (Natal city, Brazil) surface water. The water was collected at five sampling sites along the river and one sample was obtained after the treatment (flocculation, chlorination and pH correction) of the river water for human consumption. All raw river wa
Genetics and Molecular Biology. Publicado em: 2007-03
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29. Avaliação da genotoxicidade das águas do lençol freático sob a Universidade Federal do Rio Grande do Norte
The groundwater represents the most important freshwater supply of planet. Dailly, in all world a great amount of toxic and genotoxic material reaches the aquatic systems, mainly the aquifers. The Barreiras aquifer through of five water wells is responsible for the supplying of Universidade Federal do Rio Grande do Norte (UFRN). All water wells are polluted
Publicado em: 2007
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30. Avaliação da genotoxicidade das águas sueprficiais da Barragem Engenheiro Armando Ribeiro Gonçalves, Assu/RN
A contaminação de reservatórios de água é um dos principais problemas da atualidade. A Barragem Engenheiro Armando Ribeiro Gonçalves (EARG), (0608S; 3707W) localizada no estado do Rio Grande do Norte, é a segunda maior barragem do nordeste brasileiro, responsável pelo abastecimento doméstico de aproximadamente 415 mil habitantes do semi-árido brasi
Publicado em: 2007
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31. PurificaÃÃo da lectina de sementes de Moringa oleifera(WSMoL) e avaliaÃÃo da genotoxidade
The work reports the isolation and characterization of Moringa oleifera seed lectin (WSMoL). Its effects on water turbidity as well as genotoxic/mutagenic potential of water treated with different concentrations of M. oleifera seeds (MoW1, MoW2, MoW3 and MoW4) or WSMoL were also discussed. WSMoL, agglutinated different erythrocytes, was mainly active at pH 6
Publicado em: 2007
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32. Análise da presença de agentes mutagênicos nas águas do Rio Pitimbú/RN
The Pitimbu River is located at the oriental portion of the State of Rio Grande do Norte, including three importants cities named Macaíba, Parnamirim e Natal. Although its high importance as a water source, which supplys great part of the South Zone of the Natal city, this river receives a large quantity of domestic and industrial waste water without treatm
Publicado em: 2006
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33. Effects of Pterocaulon polystachyum DC. (Asteraceae) on onion (Allium cepa) root-tip cells
In Brazil leaf infusions of the plant Pterocaulon polystachyum DC (Asteraceae) are used to treat digestive problems. We used plants from six P. polystachyum populations to prepare fresh aqueous leaf infusions at the concentration normally used in Brazil (2.5 g L-1) and at twice (5 g L-1) and four times (10 g L-1) this concentration. We rooted onion bulbs in
Genetics and Molecular Biology. Publicado em: 2006
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34. The role of fine particulate matter composition of PM2,5 and ROFA in the cell mutagenic potential and toxicity: a vegetable and animal bioassay study / Efeito da composição do material particulado fino, PM2,5 e residual oil fly ash (ROFA), como determinante do potencial mutagênico e tóxico celular: um estudo em bioensaios vegetais e animais
The association between atmospheric particulate matter (PM) and adverse human health effects have been consistently reported in epidemiological and experimental studies however, the ability to define the most important components involved in PM toxicity is hindered by its complex composition. In the present study we decided to further explore the effects of
Publicado em: 2006
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35. Genotoxicity evaluation of domestic sewage in a municipal wastewater treatment plant
An evaluation of the genotoxicity of domestic sewage was carried out in a municipal wastewater treatment plant. The study was carried out using Allium cepa root tip cells through cytological parameters such as aberrant cells in anaphase-telophase and the mitotic index, and the fish species Oreochromis niloticus and Tilapia rendalli, through the index of micr
Genetics and Molecular Biology. Publicado em: 2005
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36. Estudos ecotoxicológicos da água e do sedimento do rio Corumbataí, SP. / Ecotoxicologic studies of water and sediment in the Corumbataí River, SP, Brazil.
The River Corumbataí possesses regional significance therefore its water has potential to supply the cities of Analândia, Corumbataí, Rio Claro and Piracicaba, in state of São Paulo, Brazil. The consumption for ends of domestic supplying, recreation, irrigation and protection of aquatic life demands that the standards of quality of its water are attended
Publicado em: 2005