Results 181 to 190 of about 10,044 (214)

Methods for determining microcystins (peptide hepatotoxins) and microcystin-producing cyanobacteria

Water Research, 2006
Episodes of cyanobacterial toxic blooms and fatalities to animals and humans due to cyanobacterial toxins (CBT) are known worldwide. The hepatotoxins and neurotoxins (cyanotoxins) produced by bloom-forming cyanobacteria have been the cause of human and animal health hazards and even death.
Lalita N, Sangolkar, Sarika S, Maske, Tapan, Chakrabarti   +2 more
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Distribution of Microcystin-Producing and Non-Microcystin-Producing Microcystis sp. in European Freshwater Bodies: Detection of Microcystins and Microcystin Genes in Individual Colonies

Systematic and Applied Microbiology, 2004
Microcystis is a well-known cyanobacterial genus frequently producing hepatotoxins named microcystins. Toxin production is encoded by microcystin genes (mcy). This study aims (i) to relate the mcy occurrence in individual colonies to the presence of microcystin, (ii) to assess whether morphological characteristics (morphospecies) are related to the ...
Lorena, Via-Ordorika, Jutta, Fastner, Rainer, Kurmayer, Michael, Hisbergues, Elke, Dittmann, Jiri, Komarek, Marcel, Erhard, Ingrid, Chorus   +7 more
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Accurate LC-MS analyses for microcystins using per-15N-labeled microcystins

Analytical and Bioanalytical Chemistry, 2011
Per-(15)N-labeled microcystins were prepared for use as surrogates for accurate liquid chromatography-mass spectrometry analysis. Two strains of Microcystis aeruginosa were cultured in (15)NO(3)-containing TS-15 medium. To change from the incorporation of (14)N to (15)N into all cell components, cells of Microcystis aeruginosa were precultured in Na(15)
Tomoharu, Sano, Hiroo, Takagi, Kimiyo, Nagano, Masataka, Nishikawa, Kunimitsu, Kaya   +4 more
openaire   +2 more sources

Decomposition of Microcystin-LR, Microcystin-RR, and Microcystin-YR in Water Samples Submitted to in Vitro Dissolution Tests

Journal of Agricultural and Food Chemistry, 2004
The presence of cyanobacterial toxins (microcystins) in waters and food increases the risk of toxicity to animal and human health. These toxins can degrade in the human gastrointestinal tract before they are absorbed. To evaluate this possible degradation, water samples spiked with known concentrations of microcystins MC-LR, MC-RR, and MC-YR, which are
Isabel M, Moreno, Judith, Maraver, Esther C, Aguete, Manel, Leao, Ana, Gago-Martínez, Ana M, Cameán   +5 more
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the toxicology of microcystins

Toxicon, 1998
Microcystins are a family of more than 50 structurally similar hepatotoxins produced by species of freshwater cyanobacteria, primarily Microcystis aeruginosa. They are monocyclic heptapeptides, characterised by some invariant amino acids, including one of unusual structure which is essential for expression of toxicity.
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Bioaccumulation of Microcystins in Lettuce

Journal of Phycology, 2012
The contamination of lettuce (Lactuca sativa L.) by water‐borne crude extracts of the cyanobacterium microcystin‐producing Microcystis aeruginosa (Kützing) Kützing was investigated. The aim of the study was to determine whether bioaccumulation of microcystins occurs in lettuce foliar tissue when sprayed with solutions containing microcystins at ...
Hereman, Talita Caroline, Bittencourt-Oliveira, Maria do Carmo   +1 more
openaire   +3 more sources

Effects of microcystins on fish

Environmental Toxicology and Chemistry, 2006
Abstract Microcystins (MCs) are hepatotoxic heptapeptides released into water during or on senescence of cyanobacterial blooms. This review details the different effects of the MCs on fish and discusses their potential consequences in aquatic food webs.
Malbrouck, Christelle, Kestemont, Patrick   +1 more
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Microcystin Dynamics in Aquatic Organisms

Journal of Toxicology and Environmental Health, Part B, 2009
Eutrophication of surface water has increased significantly during the past decade, resulting in increased occurrences of toxic blooms. Cyanotoxins have become a global health threat to humans, wild animals, or domestic livestock. Hepatotoxic microcystins (MC) are the predominant cyanotoxins, which accumulate in aquatic organisms and are transferred to
José C, Martins, Vítor M, Vasconcelos
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Allelopathic interactions between microcystin-producing and non-microcystin-producing cyanobacteria and green microalgae: implications for microcystins production

Journal of Applied Phycology, 2014
Most mixed culture studies on the allelopathic interactions between toxic and nontoxic cyanobacteria with phytoplankton species rarely investigate the role of microcystins (MC) production and regulation in the course of the studies. This study investigated the interactions between intact cells of toxic (Microcystis aeruginosa (Kutzing) Kutzing) and ...
Maria do Carmo Bittencourt-Oliveira, Mathias Ahii Chia, Helton Soriano Bezerra de Oliveira, Micheline Kézia Cordeiro Araújo, Renato José Reis Molica, Carlos Tadeu Santos Dias   +5 more
openaire   +1 more source

Microcystins: Toxicological Profile

2015
Cyanobacteria are ubiquitous photosynthetic prokaryotic organisms, which can form blooms and scums in surface water, characterized by a wide morphological variability. Different cyanobacteria strains, i.e., Microcystis, Planktothrix and Anabaena spp., produce microcystins (MCs), a group of more than 100 different structural variants of toxic cyclic ...
Susanna Vichi, Franca M. Buratti, Emanuela Testai   +2 more
openaire   +1 more source