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Blue-green algae in Chaohu Lake Outbreak Occasional, Cyanobacteria protein can be crosslinked with antibodies and other proteins through traditional protein crosslinking technology, it is very important to explore effective and fast way for detecting the existence of cyanobacteria. We try to detect the small change of mass through the piezoelectric sensor based on the principle of antigen and antibody...
In a context of climate change, extreme conditions may be becoming more frequent. For instance, ecologically disruptive or harmful algal blooms in the marine environment show signs of increased frequencies. Some of these blooms are also optical extremes with intense manifestations in the satellite ocean colour record but often without correct derived metrics related to their occurrence, in some cases...
The presence of cyanobacterial blooms in fresh water has increased due to the accelerated eutrophication of surface water sources. Catastrophic impact to local human and wildlife ecosystems from blooms is linked to the release of hepatotoxins, such as microcystins, into fresh water sources. Therefore, a low-cost, reliable, and highly sensitive method for low concentration detection of microcystins...
HICO, Hyperion and MERIS have already demonstrated the capabilities of hyperspectral sensors to gather information on optical properties in inland waters. With the advent of Sentinel-2, Sentinel-3, EnMap, PRISMA and HyspIRI we expect that application of remote sensing techniques for inland water quality assessment will progress even more. Some clear advantages rely on: 1) improved spatial resolution...
Consistent and accurate information on inland water quality over wider areas of the Australian continent are required to assess current condition and trends in response to key environmental and climatic impacts. Optical remote sensing offers a method to objectively assess this over multiple spatial scales provided retrieval algorithms are accurate. Here, we present the results of initial research...
The objective of this study is to map Cyanobacteria Bloom in brackish Lakes Shinji and Nakaumi using satellite data such as MODIS. The 10 satellite sensor data such as QuickBird, ALOS AVNIR-2, and MODIS from November to December, 2010 were collected in these lakes. Cyanobacteria bloom was distinguished by viewing from satellite data. Furthermore, it was judged quantitatively by Rayleigh corrected...
A cascade biological pretreatment reactor(CBPR) was used to improve the removal rates of ammonia, small molecule organic compounds and microcystins from eutrophic raw water. The pilot-scale installation was run continually based on the conventional water treatment process(CWTP) and the process combined with biological pretreatment(BPTP). The effluents of each reactor were analyzed. The results show...
Static tests were conducted to study and analyse the growing situation of M. aeruginosa and variation of dissolved total phosphorus in medium under laboratory condition. The results shows that the higher is the concentration of exogenous phosphorus, the longer log phase does M. aeruginosa have. The limiting concentration of phosphorus for growth of M.aeruginosa is 0.1mg/L. As cultured with different...
Microcystins (MCs), produced by cyanobacteria(blue-green algae), are one of the most hazardous hepatotoxic toxins found in natural environment. Under the background of algae removal and growth inhibition by ultrasonic irradiation and microcystins degradation by Ultraviolet(UV) radiation, experiments were conducted to investigate the degradation of microcystins in order to evaluate the efficiency and...
In this paper, we try to establish newly technique that the components of the biological clock are reconstituted into the liposome. In other words, we try to produce a nano size clock, capsulated into the liposome, made by protein molecules. The circadian clock is a basic cellular system found in almost all organisms. This clock generates self-sustained oscillations under constant conditions with...
This paper uses statistic and nonlinear regression approaches to describe and evaluate the changes of the cyanobacteria growth in the Guishui lake in Beijing remote suburb. The results show that high ratios of TN/TP (>20), and low concentrations of TP (<;0.3 mg/L), and COD (<;30 mg/L) may constrain the growths of the cyanobacteria in the lake. The cyanobacteria growths are positively related...
This study compared the whole composition of microbial community in continuous-flow (MBR) and batch-fed (discontinuous) (MSBR) aerobic membrane bioreactors using high-density universal 16S rRNA Microarray, which includes 506,944 probes targeted to 8935 clusters in 16S rRNA gene sequences. The Microarray results shown both MBR and MSBR had high microbial diversity. 1126 and 1002 bacterial subfamilies...
Drinking waters worldwide have experienced an increase in the occurrence of harmful algal blooms. Nutrients variance is hypothesised to be the main factor that causes algae populations outbreaks. The effects of trace nutrients and their interaction on the proliferation of planktonic algae colony, is one of the most complex factor in the formation process of algae blooms, and in addition the factor...
During the last two years, data sets from three groups and twelve sampling points were used to investigate historical changes between the concentration of the cyanobacteria and the concentrations of total nitrogen (TN), total phosphorus (TP), TN/TP, chemical oxygen dawdling (COD), NO3-, pH, and Chl-a in a shallow temperate zone lake (Guishui Lake, Beijing). The aim of this paper was to evaluate changes...
In this paper, we try to establish newly technique that the components of the biological clock are reconstituted into the liposome. In other words, we try to produce a nano size clock, capsulated into the liposome, made by protein molecules. The biological clock is a basic cellular system found in almost all organisms. This clock generates self-sustained oscillations under constant conditions with...
Spectrally resolved imaging was applied to study the growth dynamics of phototrophic biofilms comprizing a mixture of one cyanobacterial and one diatom species. Linear spectral unmixing was combined with liquid chromatography to quantitatively discriminate the areal biomass densities of the two populations. The grown biofilms exhibited highly heterogeneous distribution with patches of 1-2 mm in size,...
Microcystin-LR (MC-LR) is a heptapeptidic toxin produced by cyanobacteria. However, the genotoxic effects of MC-LR are still contrary. This study is focused on the DNA damage induced by MC-LR in human-hamster hybrid AL cell line, which is sensitive to various toxic factors. Our present data showed that MC-LR at a concentration of 0.1 mug/ml had slight effect on the celluar ATP contents and the colony...
Solid-phase extraction procedure was successfully used to purify microcystin-LR from cultured cyanobacteria. The method involved collection of cells by flocculation with polyaluminium chloride, extraction of harvested cells by 50% aqueous methanol, clean-up by liquid-liquid extraction with dichloromethane, and purification by solid-phase extraction. More than 8 mg of microcystin-LR with a purity of...
Life on earth is strongly regulated by the day-night cycle, widely known as diurnal cycle. Accordingly, many organisms have developed an internal time keeping mechanism; circadian clock, in order to maintain these rhythms even with short term modification of the external light patterns. In previous studies, different biological processes have been identified as either diurnal or circadian controlled...
After water storage of Laohutan reservoir, nitrogen (TN), total phosphorus (TP) and ammonia nitrogen (NH3-N) are the main pollutants. In the first month of water collection, the vertical distribution of TN, TP and NH3-N concentrations is increased distinctly from the surface layer to the bottom layer. It shows that the reservoir water quality is affected by pollutants released from submersed soil...
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