Microcystin Toxicity
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Antimycobacterial and cytotoxicity activity of microcystins
Background The present work aimed to evaluate the antimycobacterial activity and cytotoxicity of Microcystis aeruginosa toxins, the MC-LR variant and purified extract of [D-Leu1] microcystin-LR. Methods The antimicrobial activity of M. aeruginosa extract and microcystin was evaluated by resazurin microtiter assay against Mycobacterium tuberculosis, M. terra
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 31/03/2015
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2. Validação de método analítico livre de acetonitrila para análise de microcistinas por cromatografia líquida de alta eficiência
Blooms of cyanobacteria represent a public health risk due to their cyanotoxins such as microcystins. Liquid chromatography techniques to separate and quantify microcystins invariably use acetonitrile as the organic component of the mobile phase. The price and availability of acetonitrile together with its elevated toxicity encourage the validation of aceton
Quím. Nova. Publicado em: 2013
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3. Microcystin-XR degradation by bacteria isolated from public water supply system / Degradação da microcistina-XR por bactérias isoladas de sistema de abastecimento público de água
Microcystins are potent hepatotoxins and tumor promoters found in freshwaters that cause public health risks and thus represent a serious problem for water treatment plants. The cyanobacterium genus Microcystis is the most known toxin-producer and the most common bloom-forming in water reservoirs used for public supply. However, some bacteria are able to use
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
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4. Desenvolvimento de metodologia para controle das larvas de Limnoperna fortunei com o uso de radiação ultravioleta e seus impactos sobre Microscystis aeruginosa potencialmente presentes na água superficial
L. fortunei (Dunker, 1857), commonly known as golden mussel comes from Southeast Asia. It might have been unintentionally introduced in our water sources through ballast water, with the first records in 1991, in Rio de la Plata, near Buenos Aires, Argentina, South America. In Brazil it was first seen in 1998, in Jacuí Delta, opposite Porto Alegre¿s harbor.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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5. Tratamento de água para consumo humano de reservatório eutrofizado através de pré e interoxidação, adsorção em carvão ativado e dupla filtração / Drinking water treatment of eutrophic reservoir by pre and interoxidation, activated carbon adsorption and double filtration
Disordered basins occupation provoked acceleration of eutrophication, which besides purely aesthetic and landscaping problems, results in occurrence of high phytoplankton densities with potentially toxic cyanobacteria dominance. Alongside physical aging and consequent deterioration of installations, usual treatment technologies do not provide adequate condit
Publicado em: 2011
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6. Estudo da estrutura da comunidade zooplanctônica e sua relação com as cianobactérias em três reservatórios do médio rio Tietê, SP / Zooplankton structure and its relationships with cyanobacteria in three reservoirs of middle Tietê river, São Paulo State, Brazil
Cyanobacteria blooms are increasingly being detected in São Paulo state reservoirs, particularly in those of middle Tietê river basin. The presence of cyanobacteria can cause deterioration of water quality in these systems due to its potential toxicity to the aquatic biota, and also risks to human health. The aim of the present srtudy was to analyse the st
Publicado em: 2010
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7. Efeitos deletérios de microcistina em matrinxã (Brycon cephalus) e tilápia nilótica (Oreochromis niloticus). / Deleterious effects of microcystin on matrinxã (Bryan cephalus) and Nile tilapia (Oreochromis niloticus)
The aim of this study was to evaluate the water quality in fish earthpond with blooms of cyanobacterias and acute toxicity (DL50 - 24 hs) of microcystin in species (Brycon cephalus) and tilapia nilotica (Oreochromis niloticus) as well as histological changes in gills, kidney and liver in fish. Water quality monitoring was carryed out in a pisciculture in Esp
Publicado em: 2010
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8. Estudo das interações fitoplâncton-protozooplâncton no reservatório de Barra Bonita, SP, com ênfase na toxicidade de microcistinas
The increasing eutrophication of aquatic environments, resulting from the human activities, is related to cyanobacterial blooms that are described, all over the world, as the agents causing toxicity and death in humans, domestic and wild animals. Recently, studies are being conducted aiming to prove the possibility of the biotransference of the cyanobacteria
Publicado em: 2009
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9. Interação entre Cylindrospermopsis raciborskii e Microcystis aeruginosa: implicações no crescimento de culturas e na produção de microcistinas / Interaction between Cylindrospermopsis raciborskii and Microcystis aeruginosa: implications in cultures growth and microcystins production
Cyanobacteria play important ecological role in many terrestrial and aquatic ecosystems. However, they become a public health problem when synthesize secondary toxic compounds, known as cyanotoxins, which may act on several organisms. Impacted aquatic systems favor their growth and these microorganisms can become dominant due to mechanisms that confer them a
Publicado em: 2009
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10. Degradation study of [D-Leu]-Microcytin-LR using solar heterogeneous photocatalysis / Estudo da degradação da [D-Leu]-Microcistina-LR por fotocatálise heterogênea solar
Um dos bens mais preciosos da Humanidade é a água. Embora ela seja abundante no planeta, grande parte é imprópria para o consumo humano. E, devido ao crescimento populacional intenso, à concentração urbana e à poluição dos corpos dágua superficiais e subterrâneos, a quantidade de água em condições para consumo vem se reduzindo em taxas alarman
Publicado em: 2009
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11. Colorimetric Immuno-Protein Phosphatase Inhibition Assay for Specific Detection of Microcystins and Nodularins of Cyanobacteria
A novel immunoassay was developed for specific detection of cyanobacterial cyclic peptide hepatotoxins which inhibit protein phosphatases. Immunoassay methods currently used for microcystin and nodularin detection and analysis do not provide information on the toxicity of microcystin and/or nodularin variants. Furthermore, protein phosphatase inhibition-base
American Society for Microbiology.
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12. Toxicity and toxins of natural blooms and isolated strains of Microcystis spp. (Cyanobacteria) and improved procedure for purification of cultures.
All samples of cyanobacterial blooms collected from 1986 to 1989 from Lake Kasumigaura, Ibaraki Prefecture, Japan, were hepatotoxic. The 50% lethal doses (LD50s) of the blooms to mice ranged from 76 to 556 mg/kg of body weight. Sixty-eight Microcystis cell clones (67 Microcystis aeruginosa and 1 M. viridis) were isolated from the blooms. Twenty-three strains