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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 67 for “"Microcystis"”.
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Implications of Microcystin Production in Microcystis aeruginosa PCC 7806
… of the most common bloom-forming cyanobacterium Microcystis aeruginosa. In a first attempt, the effect of elevated light intensity on microcystin production and its binding to cellular proteins was studied. Therefore, conventional microcystin quantification techniques were combined with …
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The roles of secondary metabolites in microcystis inter-strain interactions
… and potentially harmful cyanobacteria, the genus Microcystis represents a most diverse taxon, on the genomic as well as on morphological and secondary metabolite levels. Microcystis communities are composed of a variety of diversified strains. The focus of this study lies on potential interactions …
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ISOLATION OF ELECTRON TRANSPORT COMPONENTS FROM MICROCYSTIS AERUGINOSA AND OSCILLATORIA SP
… transport chain, were isolated and purified from Microcystis aeruginosa. Cytochrome c 553 was purified from Oscillatoria sp. for reasons of comparison. Finally, cytochrome c550, an enigmatic haem protein whose function is unclear, was also purified from M- aeruginosa. A newly developed …
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Chlorine dioxide impacts on microcystis aeruginosa cell stress, growth and microcystin production
… tested to inhibit a toxin-producing strain of Microcystis aeruginosa. Through a series of experiments, ClO2 was exposed to M. aeruginosa, and the production of microcystin was monitored. The first experiment, batches of M. aeruginosa were exposed to ClO2 (0-10 mg/L) for 30 minites. Chlorophyll …
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Pathways of Transport of Microcystin-LR from Microcystis aergonisa to the Benthic Environment
… concern that affect humans and wildlife. <em>Microcystis aeruginosa </em>(<em>Microcystis)</em> is a freshwater photosynthetic cyanobacterium that is planktonic during warm months but has an overwintering benthic phase. <em>Microcystis </em>create toxins, including microcystins that can lead …
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Population structure of the cyanobacterium Microcystis mediated by history, grazing and interstrain interactions
… widespread toxic bloom forming cyanobacteria is Microcystis (order Chroococcales), which has received much scientific attention. Studies based on several molecular markers have shown that naturally occurring Microcystis populations are generally composed of several genotypes. Although these …
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DYNAMICS OF MICROCYSTIS-INFECTING CYANOPHAGES IN TROPICAL FRESHWATERS THROUGH QPCR AND NEXT GENERATION SEQUENCING
… there are two approaches, (1) to focus on Microcystis cyanobacteria and its associated Ma-LMM01-type cyanophages and (2) to use Next-Generation Sequencing (NGS) to further our understanding on the viral community and diversity. Results from this thesis study showed the influence of …
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Die raum-zeitliche Variation von Microcystis spp. (Cyanophyceae) und Microcystinen in der Talsperre Quitzdorf (Sachsen)
… eine Schlüsselrolle. MCYST werden u.a. von Microcystis KÜTZING EX LEMMERMANN 1907 gebildet. Erkenntnisse zur ökophysiologischen Funktion der MCYST, die zweifelsfrei bei den Produzenten selbst zu suchen ist, liegen bisher kaum vor. Mit Hilfe von Freilanduntersuchungen sollten im Rahmen der …
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Developing new approaches for monitoring and controlling the toxic cyanobacterium Microcystis through flow-cytometric analysis
… cyanobacteria, where bloom-forming genera like Microcystis can cause anoxic environments, damage filtration systems and produce potent toxins. As future projections of climate change and anthropogenic nutrient loading continue to favour the growth of Microcystis it adds further stress to an …
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Assessing the use of Viviparus georgianus snails as a means for biomanipulation of cyanobacterial species Microcystis aeruginosa
… biomanipulation of the cyanobacterial species Microcystis aeruginosa. We assessed this by using chlorophyll a (chl-a) as a measure for cyanobacteria in the upper and lower water columns of an ex-situ microcosm experimental system with and without the presence of snails, over an approximate …
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The Role of Nitrogen and Phosphorus in the Growth, Toxicity, and Distribution of the Toxic Cyanobacteria, Microcystis aeruginosa
<p><em>Microcystis aeruginosa</em> is among the most common harmful algal-blooming species in the world. Potent microcystins released by <em>M. aeruginosa </em> have been linked to liver failure and death in aquatic mammals, like the endangered California sea otter, and provide a serious public …
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An investigation on the effects of cyanopeptides on the growth and secondary metabolite production of Microcystis aeruginosa PCC7806.
… metabolite production characteristics of Microcystis aeruginosa PCC7806. The technique of labelling secondary metabolites with 15N was successfully employed in differentiation and quantification of ex-novo and de-novo metabolites. The effect of exogenous cyanopeptides such as microcystins, …
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The effect of phosphorus and nitrogen limitation on viral infection in microcystis aeruginosa NIES298 using the cyanophage Ma-LMM01
… host-phage system: Ma- LMM01 (phage) and <em>Microcystis aeruginosa</em> strain NIES298 (host), both of which originate from a eutrophic lake in Japan. The effect of phosphate and nitrogen limitation on phage and host replication was evaluated through modification of <em>M. aeruginosa</em> …
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The growth promoting effect of 2,4-Dichlorophenoxyacetic acid (2,4-D) and 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) on Microcystis aeruginosa
Microcystis aeruginosa is known widely for the obnoxious nature of its bloom. Problems resulting from blooms of the alga include: death of fish and other aquatic life, clogging of filter systems in water treatment plants, taste and odor problems, and death of cattle and water fowl via extracellular …
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Factors Affecting Phytoplankton Biodiversity and Toxin Production
… limits and high numbers of the cyanobacterium, Microcystis, research was continued to ascertain the impact of Microcystis on algal biodiversity. A series of beakers was inoculated with Microcystis, in addition to the genera of algae that were most commonly seen throughout our study sites, and a …
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Phytoplankton community structure and cyanobacterial blooms in reservoirs in the semi-arid highlands of Tigray, Ethiopia
… by a single genus of cyanobacteria (mostly Microcystis), chlorophytes, euglenophytes, cryptophytes or dinophytes. Similarly the bacterial community richness in the studied reservoirs was also low. Lower bacterial taxon richness was encountered in reservoirs with Microcystis blooms than …
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Flow Cytometric Analysis for Cyanobacteria in 36 New Jersey Freshwater Bodies
… IU 625), <em>Cylindrospermum</em> spp. and <em>Microcystis aeruginosa</em> (<em>M. aeruginosa</em>) were utilized as references. Polymerase chain reaction (PCR)-based assay was performed for the validation of the flow cytometric analysis. The results revealed 17 out of the 36 sites showed all …
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