detect microcystin Articles | Environmental XPRT

Biodegradation of microcystin [Dha7]MC-LR by a novel microcystin-degrading bacterium in an internal airlift loop bioreactor

Cyanobacterial hepatotoxin microcystins are a health problem found in bodies of water in Thailand. Bacteria capable of biodegrading microcystin [Dha7]MC-LR were isolated from the Bueng Nong Khot reservoir in Khon Kaen, Thailand. The bacterium Novosphingobium isolate KKU25s was shown to degrade [Dha7]MC-LR at a concentration of 25 μg l−1 at 30 °C within 24 h. ...

Sep. 21, 2015

By IWA Publishing

Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA

Despite historical observations of potential microcystin‐producing cyanobacteria (including Leptolyngbya, Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina during 1993‐2011, fluvial cyanotoxin occurrence has not been systematically assessed in the southeastern United States (USA). To begin to address this data ...

Feb. 4, 2016

By John Wiley & Sons, Ltd.

Comparison of different anion-exchange chromatography resins for the purification of cyanobacterial microcystins

For the first time, different types of diethylaminoethyl (DEAE) anion-exchange resins, widely used in previous studies, were investigated to determine the most effective resin for the purification of microcystins (MCs). MCs were extracted from freeze-dried Microcystis aeruginosa cells that had been harvested from the Bueng Nong Khot reservoir, Khon Kaen, Thailand. The toxins were precipitated ...

Jul. 18, 2015

By IWA Publishing

Maternal repeated oral exposure to microcystin‐LR affects neurobehaviors in developing rats

Microcystins are toxic peptides secreted by certain waterblooms of toxic cyanobacteria. The most widely studied microcystin is microcystin‐LR (MC‐LR), which exhibits hepatotoxicity and neurotoxicity. However, limited information is available regarding the effects on offspring following maternal exposure. The present study is to observe the effects of progestational exposure to MC‐LR on ...

Oct. 15, 2014

By John Wiley & Sons, Ltd.

Occurrence of toxic cyanobacteria and microcystin toxin in domestic water storage reservoirs, Egypt

Residents in many developing countries store treated drinking water in tanks or reservoirs because of intermittent and infrequent water supplies. Many studies have focused on bacterial contamination of domestic reservoir waters, the cyanobacterial and algal contamination is largely unexplored. Therefore, the present study investigates toxic cyanobacteria and their microcystin (MC) toxins in ...

Apr. 13, 2016

By IWA Publishing

Quantitative analysis of glutathione and cysteine S-conjugates of microcystin-LR in the liver, kidney and muscle of common carp (Cyprinus carpio) in Lake Taihu

Tissue distribution of microcystin (MC)-LR-GSH, MC-LR-Cys and MC-LR of omnivorous fish in Lake Taihu was investigated. MC-LR and MC-LR-Cys were detected in liver, kidney and muscle. The concentration of MC-LR in liver and kidney was 0.052 μg g−1 DW and 0.067 μg g−1 DW, respectively. MC-LR-Cys appeared to be an important metabolite with average contents of 1.104 μg g−1 DW and ...

Dec. 8, 2016

By IWA Publishing

Comparison of <italic>Microcystis aeruginosa</italic> (PCC7820 and PCC7806) growth and intracellular microcystins content determined by liquid chromatography–mass spectrometry, enzyme-linked immunosorbent assay anti-Adda and phosphatase bioassay

Comparison of Microcystis aeruginosa (PCC7820 and PCC7806) growth and intracellular microcystins content determined by liquid chromatography–mass spectrometry, enzyme-linked immunosorbent assay anti-Adda and phosphatase bioassay

Cyanobacteria are able to produce several metabolites that have toxic effects on humans and animals. Among these cyanotoxins, the hepatotoxic microcystins (MC) occur frequently. The intracellular MC content produced by two strains of Microcystis aeruginosa, PCC7806 and PCC7820, and its production kinetics during the culture time were studied in order to elucidate the conditions that favour ...

Mar. 19, 2014

By IWA Publishing

Calibration of a passive, in situ, integrative sampler for monitoring of microbial biotoxins in aquatic environments

In this work, an integrative passive sampler based on a silicone membrane filled with a suspension of γ-Fe2O3 at pH 3.5 was developed. The novel device was calibrated for the measurement of microcystin concentrations in water. Laboratory calibration studies of the passive sampling devises under controlled conditions of temperature, water turbulence, and analyte concentration were ...

Jul. 7, 2015

By IWA Publishing

Fecal contamination and Microcystis in drinking-water sources of rural Cambodia using PCR and culture-based methods

Rural communities within low-income countries frequently rely on a range of drinking-water sources, and each water source varies in its potential for biological contamination. The extent and source of biological contamination in primary drinking sources within Kien Svay, Kandal, Cambodia, were determined by fecal indicator bacteria (FIB) measurements, 16S rDNA genetic markers for human and ...

Jun. 30, 2016

By IWA Publishing

Cyanobacteria and bacteria co-occurrence in a wastewater treatment plant: absence of allelopathic effects

Fifty-one cyanobacteria strains, belonging to Phormidium autumnale, Planktothrix mougeotii, Limnotrix sp. and Synechocystis sp. species, were isolated during a twelve months period, from a Wastewater Treatment Plant (WWTP) located in the north of Portugal. Isolated strains and environmental samples were analyzed by Polymerase Chain Reaction (PCR) ...

Oct. 1, 2010

By IWA Publishing

Behaviour of cyanobacterial bloom material following coagulation and/or sedimentation

The global increase in detection of cyanobacteria and their metabolites has prompted greater emphasis in optimizing water treatment options for their effective removal. In particular, conventional coagulation and clarification processes have been shown to be effective in removing whole cyanobacterial cells, and consequently a majority of the metabolites. However, the resultant ...

Aug. 29, 2013

By IWA Publishing

What’s in Your Water

Water can be said to be the essence of life. Indeed, in many indigenous cultures, water is strongly linked to a people’s cultural identity. With the unfortunate news about the amount of lead found in Flint, Michigan’s public water system, perhaps more scrutiny and resources will be designated to improve and monitor this vital resource. But before you pour water into your glass, ...

Nov. 11, 2016

By Precision Measurement Engineering, Inc. (PME)

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