Results 221 to 230 of about 23,887 (275)

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
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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
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Microcystin Elimination During Sediment Contact

Environmental Science & Technology, 2009
Microcystins (MCYSTs) are a group of structurally similar toxic peptides produced by cyanobacteria ("blue-green algae") which occur frequently in surface waters worldwide. Reliable elimination is necessary when using these waters as drinking water sources.
Grützmacher, Gesche, Wessel, Gabriele, Klitzke, Sondra, Chorus, Ingrid   +3 more
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Toxicology and Evaluation of Microcystins

Therapeutic Drug Monitoring, 2000
This paper reviews the toxicity and tumor-promoting properties of microcystins. Methods for screening and/or identification of microcystins in environmental samples are discussed and compared. Specific emphasis is placed on newly developed extraction/detection methods, e.g., solid phase microextraction (SPME) technique, and capillary electrophoresis ...
P K, Lam, M, Yang, M H, Lam
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Electrochemical Degradation of Microcystin-LR

Journal of Environmental Science and Health, Part A, 2005
Microcystin-LR present in drinking water sources poses a considerable threat to human health. Conventional oxidation treatment systems, such as photocatalysis and ferrate oxidation, demonstrated the formation of by-products detectable in the treated microcystin-LR solution.
Chuanping, Feng, Norio, Sugiura, Yuzuru, Masaoka, Takaaki, Maekawa   +3 more
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Chromatography of microcystins

Analytica Chimica Acta, 1997
Abstract This review deals with the analytical and preparative chromatography of microcystins and nodularins, cyclic peptide liver toxins and tumor promoters from cyanobacteria. The chemistry of the toxins, extraction from various matrices, separation on different stationary phases, and detection of intact and derivatized toxins are considered.
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Microcystin-LR Adsorption by Activated Carbon

Journal of Colloid and Interface Science, 2001
We use a selection of wood-based and coconut-based activated carbons to investigate the factors controlling the removal of the hepatotoxin microcystin-LR (m-LR) from aqueous solutions. The wood carbons contain both micropores and mesopores. The coconut carbons contain micropores only.
Phillip, Pendleton, Russell, Schumann, Shiaw Hui, Wong   +2 more
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Microcystin in Missouri reservoirs

Lake and Reservoir Management, 2009
Abstract During summers (May–Aug) 2004–2006, 177 Missouri reservoirs were sampled monthly at open pelagic locations to assess regional patterns in microcystin concentration, frequency of occurrence over successive summer seasons and relations with environmental factors. Microcystin was detected in 58% of Missouri reservoirs and 23% of samples (n = 1402)
Jennifer L. Graham, John R. Jones
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Automated purification of microcystins

Journal of Chromatography A, 1996
Abstract A simplified method for the concentration and purification of microcystins was developed. A 3-1 volume of cyanobacterial scum (equivalent to 124 g dry mass of cells) collected from Rutland and Water, Leicestershire, in 1989 was extracted in methanol and centrifuged and the supernatant was retained. This was diluted to ca.
Christine Edwards, Linda A. Lawton, Sadie M. Coyle, Paul Ross   +3 more
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