Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 35 for “"Microcystis aeruginosa"”.
-
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 …
-
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 …
-
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 …
-
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 …
-
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 …
-
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, …
-
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> …
-
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 …
-
The toxicity of microcystin-LR in swine and mice
… hepatotoxin produced by the cyanobacterium Microcystis aeruginosa. One gilt given whole M. aeruginosa cells ig containing 0.3% MCLR and des-methyl MCLR at 2.1 g/kg had severe panlobular hepatic necrosis and hemorrhage when euthanatized at 32.5 hr postdosing.
-
Effets de la pollution lumineuse sur l'écophysiologie de Microcytis aeruginosa
… Dans cette étude, une cyanobactérie, Microcystis aeruginosa , a été cultivée en turbidostat en absence et en présence d'éclairage nocturne tel qu'observé à la surface d'un lac urbain éclairé. Plusieurs mesures ont été réalisées des intervalles de deux heures sur trois périodes de 48h …
-
Toxicopathology of microcystin-LR in vivo and in vitro
… (MCLR), produced by the blue-green alga Microcystis aeruginosa, causes death of livestock and is a public health hazard. The mechanism of MCLR toxicity was investigated using the rat. Changes in serum chemistry parameters and morphology caused by MCLR were characterized in vivo and in …
-
Nutrient Controls Over Cyanobacterial Synthesis of the Neurotoxin β-N-Methylamino-L-Alanine (BMAA) and Its Potential Accumulation in the Blue Crab (<i>Callinectes Sapidus</i>)
… species thought to produce BMAA —<em>Microcystis aeruginosa</em>, <em>Synechococcus bacillaris</em>, and <em>Nostoc sp</em>. —were grown in nutrient replete cultures to examine its synthesis and cellular distribution over a growth cycle. Production of BMAA was also examined in nutrient …
-
Theoretical copper sulfate dosing;the effect of alkalinity and humic acid on ionic copper toxicity to algae
… studies with Selenastrum capricornutum and Microcystis aeruginosa. The goal was to give practical information for water treatment plants operators who often must apply copper sulfate for algae control in impoundments. Research focused on the theoretical relationships involved in copper …
-
Geochemical and limnological aspects of phosphorous contamination in the Noordhoek Valley, Cape Peninsula
… occurrence of toxic cyanobacteria of the species Microcystis aeruginosa was reported for the two main water bodies within the wetland. The objective of this study was to conduct an investigation of geochemical and limnological aspects of phosphorus contamination within the wetland. The …
-
Development of optical bio-sensing methods for detection of toxins produced by algae.
… of the MC-LR toxin produced naturally by algae microcystis aeruginosa was evaluated using calibration data obtained for solutions spiked with known concentrations of MC-LR. The role of environmental factors (temperature, pH, nutrition contents, and salinity) on the efficiency of production of …
-
Removal of organic compounds from aquatic environments by advanced oxidation processes.
… bench-scale experiments for the removal of Microcystis aeruginosa cells and microcystins. A common way of verifying the effects of light-driven treatments on cyanobacteria is by performing lab-scale experiments, where cyanobacteria are cultured in growth media. In the current study, six …
-
The phytoplankton communities of nine lakes, Waikato, New Zealand: a comparative study of floristics, seasonal dynamics and the influence of herbivory
… selected species (e.g., Botryococcus braunii and Microcystis aeruginosa). Unpredictable sequences of domination, one class replacing another after brief periods of importance, were recorded in lakes where ephemeral periods of summer stratification alternated with either equally short periods of …
Page 1 of 2