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Gonçalves-Soares, Daniela; Zanette, Juliano; Yunes, João Sarkis; Yepiz-Plascencia, Glória; Bainy, Afonso Celso Dias
(2012)
Microcystin (MC) produced during cyanobacteria blooms is notably toxic to human and wildlife. Conjugation with reduced glutathione (GSH) by glutathione S transferase (GST) and the antioxidant enzymes defenses (e.g. catalase, ...
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Yunes, João Sarkis
(2009)
Florações da cianobactéria Microcystis são regulares e recorrentes na lagoa dos Patos e seu estuário (RS). Embora o primeiro registro científico seja datado de 1987, informações de antigos moradores das margens indicam que ...
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Amado, Lílian Lund; Garcia, Márcia Longaray; Ramos, Patrícia Baptista; Yunes, João Sarkis; Monserrat, José María
(2011)
We evaluated the effects of aqueous extracts of the cyanobacterium-producing microcystin (MC), Microcystis aeruginosa (strain ST9501), on detoxification capacity and glutathione (GSH) synthesis in liver, brain,
gill, and ...
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Amado, Lílian Lund; Garcia, Márcia Longaray; Ramos, Patrícia Baptista; Yunes, João Sarkis; Monserrat, José María
(2011)
We evaluated the effects of aqueous extracts of the cyanobacterium-producing microcystin(MC), Microcystis aeruginosa (strain RST9501), on detoxification capacity and
glutathione (GSH) synthesis in liver, brain,
gill, ...
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Bif, Mariana Bernardi
(2015)
O gênero Trichodesmium ocorre nos oceanos tropicais e subtropicais do planeta e atua diretamente no ciclo do nitrogênio e do carbono. Por ser diazotrófico, Trichodesmium consegue estabelecer populações em regiões oligotróficas, ...
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Lobo, Felipe de Lucia; Barbosa, Cláudio Clemente Faria; Novo, Evlyn Márcia Leão de Moraes; Yunes, João Sarkis
(2009)
This paper proposes an approach for using remote sensing data for identification and
mapping of cyanobacterial blooms; Methods: It uses two sets of spectra (empirical and theoretical) as reference to classify the areas ...
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Amado, Lílian Lund; Garcia, Márcia Longaray; Ramos, Patrícia Baptista; Freitas, Ricardo Franco; Zafalon, Bruna; Ferreira, Josencler Luis Ribas; Yunes, João Sarkis; Monserrat, José María
(2009)
Determination of total antioxidant capacity, instead of the measurements of limited
number of antioxidants, is very important for the understanding of how antioxidants
interact with reactive oxygen species (ROS). Several ...
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Leão, Janaina de Castro; Monserrat, Laura Alicia Geracitano; Amado, Lílian Lund; Monserrat, José María; Yunes, João Sarkis
(2008)
Oxidative stress induced by microcystins was evaluated in an estuarine worm, Laeonereis acuta (Nereididae).Ten organisms were
exposed to lyophilized cells of a toxic Microcystis aeruginosa strain RST9501
( 2 lg/mL ...
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Kist, Luiza Wilges; Fritsch, Rachel Seemann; Yunes, João Sarkis; Bonan, Carla Denise; Bogo, Maurício Reis
(2012)
Microcystins (MCs) are toxins produced by
cyanobacteria during the blooms that could
accumulate in aquatic animals and be relocated
to higher trophic levels. Adenosine triphosphate
(ATP) acts as an excitatory ...
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Leão, Janaina de Castro; Giordano, Sheila Bueno; Yunes, João Sarkis
(2010)
Microcystins (MCYST), common cyanobacterial hepatotoxins, have been observed in the Patos Lagoon and the estuary over the last three decades. Anthropogenic pollution associated to the environmental features has promoted ...
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Becker, Vanessa; Ihara, Priscilla Mieko; Yunes, João Sarkis; Huszar, Vera Lúcia de Moraes
(2010)
Cyanobacterial blooms and the accompanying
production of cyanotoxins are a serious global problem. Toxic blooms of Anabaena species are common in lagoons and reservoirs of southern Brazil. Worldwide, species of the
genus ...
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Ferreira, Ana Helena Ferreira; Minillo, Alessandro; Silva, Luciano de Mello; Yunes, João Sarkis
(2004)
O presente trabalho visou o estudo de Anabaena spiroides na Lagoa dos Patos e dos fatores ambientais favoráveis ao seu aparecimento. Durante 15 meses e em cinco pontos de amostragem ao longo do estuário, foram medidos ...
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Chaves, Priscila Freitas; Rocha, Sabrina de la; Dutra, Amanda; Yunes, João Sarkis
(2009)
Cianobactérias são microorganismos procariontes e autotróficos encontrados em diversos habitats. A disponibilidade de nitrogênio e fósforo e de condições ideais de temperatura e de pH nas águas favorecem as florações. No ...
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Ramos, Patricia Baptista; Diehl, Felipe; Santos, Juliane Marques dos; Monserrat, José María; Yunes, João Sarkis
(2014)
Saxitoxins (STXs) are neurotoxins produced by cyanobacteria such as Cylindrospermopsis raciborskii.
During bloom events, the production of these compounds causes contamination on public water supply
sources. STXs block ...
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Werlang, Chariane Camila
(2020)
Os fatores que influenciam a dinâmica do fitoplâncton na região Sul-Sudeste do
talude continental e plataforma interna do sudoeste do Atlântico Sul são
relativamente conhecidos, mas a maneira como estes afetam a produção ...
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Yunes, João Sarkis; Cunha, Nérile Troca da; Conte, Stella Maris; Giordani, Áurea Terezinha; Rabelo, Ivone Marlí Mendes; Bendati, Maria Mercedes; Maizonave, Carmem Rosália Marodin; Granada, Gilcléa Lopes; Hein, Renato Priori
(2000)
Um programa de cooperação entre a Unidade de Pesquisas em Cianobactérias (UPC) da FURG (RS, Brasil) e as empresas de saneamento de nível estatal: CORSAN (para o Rio Grande do Sul) e municipais, como DMAE (Porto Alegre-RS), ...
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Lobo, Felipe de Lucia; Yunes, João Sarkis; Barbosa, Cláudio Clemente Faria; Londe, Luciana de Resende; Pereira Filho, Waterloo; Theil, Cristina Iepsen; Novo, Evlyn Márcia Leão de Moraes
(2009)
Remote sensing techniques using hyperspectral data can retrieve some pigment optical properties of cyanobacteria bloom and enhance the spatial monitoring models. In this way, the laboratory experiment reported here was ...
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Yunes, João Sarkis; Rocha, Sabrina de la; Giroldo, Danilo; Silveira, Savênia Bonoto da; Comin, Rubens; Bicho, Mirian da Silva; Melcher, Silvia Susanne; Sant'anna, Célia Leite; Vieira, Armando Augusto Henriques
(2009)
Raphidiopsis brookii P. J. Hil(cyanobacteria) was isolated from a small subtropical eutrophic pond (Biguá Pond) located in the grounds of Rio Grande University in the extreme south of Brazil, following a toxic bloom of ...
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Votto, Ana Paula de Souza; Renon, Viviane Plasse; Yunes, João Sarkis; Rumjanek, Vivian Mary Barral Dodd; Capella, Marcia Alves Marques; Moura Neto, Vivaldo; Freitas, Marta Sampaio de; Monserrat, Laura Alicia Geracitano; Monserrat, José María; Trindade, Gilma Santos
(2007)
Multidrug resistance (MDR) is an obstacle in cancer treatment. An understanding of how tumoral cells react to oxidants can help us elucidate the cellular mechanism involved in resistance. Microcystins are cyanobacteria ...
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Guimarães, Pablo Santos
(2015)
Nas últimas décadas comunidades de tapetes microbianos têm sido descritas nos mais diversos ambientes do hemisfério Norte, enquanto que a escassez de relatos para a América do Sul reflete a falta de estudos e grupos dedicados ...