algae sampling Articles
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Sorption of heavy metals in the biomass of alga
Palmaria palmata Sorption of heavy metals by the sea alga Palmaria palmata was investigated in laboratory conditions. The sorption process of the analytes was carried out with constant flow of the solutions through the algae samples. The Langmuir isotherm model was used to describe equilibria. The experiments confirmed that 50 min of exposure of algae with little heavy metal contamination in contaminated waters ...
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Algae Enumeration and Identification
Algae Enumeration and Identification Algae are ubiquitous in virtually all aquatic environments and are important bioindicators of water quality. They are frequently used to assess and monitor the health of aquatic systems. On the other hand, they are also responsible for imparting undesirable flavors to potable water supplies and pose potential health threats, particularly during algal blooms. ...
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Comparison in growth, lipid accumulation, and nutrient removal capacities of
Chlorella sp. in secondary effluents under sterile and non-sterile conditionsThe growth, lipid accumulation and nutrient removal characteristics of an oleaginous microalga Chlorella sp. HQ in two types of secondary effluents (named as X and Q) before/after sterilization were evaluated. The results show that the algal growth rates under sterilization were higher than those under non-sterilization. However, sterilization caused a significant decrease in algal lipid and ...
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Diatoms as bioindicators of pollution in the Mantaro River, Central Andes, Peru
Semi-quantitative analysis of two algal samples from the Mantaro River taken few kilometres downstream from La Oroya city at Junin, Peru, contained both organic-pollution tolerant and morphologically abnormal diatom associations. The organic pollution is inferred by elevated percentages of Nitzschia palea, Gomphonema parvulum and the Achnanthidium minutissimum complex; the total assemblage ...
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Effects of electrolysis stress on the growth of Microcystis aeruginosa
As a result of electrolysis, biomass was controlled to some extent and the protein content per gram wet algae decreased. The viability of the algae was measured by the flow cytometry. Without taking into account the consumption of substrate, Microcystis aeruginosa growth kinetics was demonstrated that the electrolysis would inhibit the algal growth. At the same time, photosynthetic efficiency ...
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Laboratory algal bioassays using PAM fluorometry: Effects of test conditions on the determination of herbicide and field sample toxicity
Pulse Amplitude Modulation (PAM) fluorometry, based on chlorophyll a fluorescence, is a frequently used technique in algal bioassays to assess toxicity of single compounds or complex field samples. It is known that several test conditions can influence the test results and since a standardized test protocol is currently lacking, it is difficult to link the results of different studies. ...
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Test organisms behaviour on municipal and industrial wastewater quality assessment
Industrial wastewaters quality became a target for the environmental toxicity assessment nowadays. When there are issues with complex effluents for which many chemicals cannot be quantified and/or interactive effects are likely to be significant, the use of bioassays with different test species becomes a more reliable way in the assessment of toxicity. Ecotoxicity evaluation of the several ...
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Two cyanobacterial strains can be distinguished from each other and other eukaryotic algae by spectral absorption method
Spectral absorption method based on two step linear regression analyses (TSLR) was applied for detection of two strains of cyanobacterium, Microcystis (blue-green algae) from eukaryotic algae. Both blue-green algae, algae and dissolved organic carbon (DOC) were considered from freshwater bodies in Kanto region, Japan. The results show that blue-green species can be detected from other algal ...
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All clear in lake Twiste
Danger over for swimmers: what appears to be disgusting, is purely natural – algae Lake Twiste is clean and free of blue-green algae even if at the moment there is a large amount of filamentous algae present. However, this is not a problem and completely natural, Andreas Gründel, Environmental Engineer from the Hessen State Authority for the Environment and Geology explained. A bather ...
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Phosphate release from waste stabilisation pond sludge: significance and fate of polyphosphate
Net phosphorus removal from waste stabilisation pond (WSP) systems is governed by the rate of phosphorus incorporation into the sludge layer and the rate of phosphorus release from this sludge back to the overlying wastewater. Luxury uptake of phosphorus by microalgae has been shown to occur under WSP conditions in the laboratory; however, the significance of this mechanism and the fate of ...
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PCR amplification and DNA sequence of
mcy A gene: The distribution profile of a toxigenicMicrocystis aeruginosa in the Hartbeespoort Dam, South AfricaUsing new polymerase chain reaction (PCR) primers, a once known to be under-transcribed microcystin synthetase A (mcyA) gene from the only known toxigenic cyanobacterium Microcystis aeruginosa dominating the Hartbeespoort Dam was consistently amplified from genomic DNA extracted from a set of algal and cell free water samples collected across this dam. In addition to this, five more mcy genes ...
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Map of the Month - June
Welcome to Edinburgh Instruments monthly blog celebrating our work in Raman, Photoluminescence, and Fluorescence Lifetime Imaging. Every month we will highlight our pick for Map of the Month to show how our spectrometers can be used to reveal all the hidden secrets in your samples. June Diatoms are light absorbing algae which, through carbon fixation, produce over 20% of the air we breathe. Their ...
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Comparison of the Conventional Algal Assay and the Algaltoxkit FTM Microbiotest for Toxicity Evaluation of Sediment Pore Waters
Abstract : Conventional algal tests have not been utilized to their full potential for routine toxicity assessments. This is mainly due to the complexicity of these assays and the fact that many operators are still encountering practical difficulties. In view of the need for a cost-effective alternative to standard algal assays for routine testing, a new culture/maintanance free algal test was ...
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Characterizing the properties of dissolved organic matter isolated by XAD and C-18 solid phase extraction and ultrafiltration
The properties of aquatic dissolved organic matter (DOM) isolated by solid phase extraction (SPE) C-18 cartridges, ultrafiltration, and XAD chromatography are compared. Samples taken from the Suwannee River, Georgia, USA and McDonalds Branch in the Pine Barrens, New Jersey, USA were chosen to represent waters where DOM originates from predominantly terrestrially-derived (allochthonous) ...
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Spray drying of microalgae biomass for biofuel production
BUCHI Mini Spray Dryer B-290: Yield and total yield determination in spray dried microalgaes Recently, microalgal biomass has been recognized as a promising alternative source of raw material for biofuel production. Algal biomass has several advantages that may help to meet the need for the global demand of transport fuels, such as rapid growth rate, high lipid content, small land usage, and ...
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Control and monitor Algae in a Lake - Case Study
As part of the Clearwater PMPC project, 2 MPC Buoys were deployed in the Skrzyneckie Małe Lake to test the performance of this unique technology. The Challenge: Control and Monitor Toxic Algal Blooms The ClearWaterPMPC project was initiated by LG Sound and funded by "Research for SMEs" within the EU 7th Framework Programme. The goal of the ClearWaterPMPC (Predicting, Monitoring,Preventing, ...
By LG Sonic
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Odorant screening and possible origin analysis of odor episodes in one reservoir in northern China
Odorous drinking water problem occurred repeatedly in one city in northern China in recent years. The uniqueness of this odor episode lay in two aspects: (1) the odorous chemicals were quite different from common odorants, such as geosmin and 2-MIB; and (2) it occurred repeatedly in different seasons during a time span of more than 2 years. The screening of odorants was the first and one of ...
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Heavy metals, PAHs and toxicity in stormwater wet detention ponds
Concentrations of 6 different heavy metals and total polycyclic aromatic hydrocarbons (PAHs) were determined in stormwater runoff and in the pond water of two Danish wet detention ponds. The pond water samples were analyzed for toxic effects, using the algae Selenastrum capricornutum as a test organism. Stormwater and pond water from a catchment with light industry showed high levels of heavy ...
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Finding the needle in the hay stack - tracing seabed gas seepages using hullborne multibeam echo sounder, and AUV based sonar and optical systems case study
Scientific objective A better understanding of the shallow geological systems in the Barents Sea with particular attention to fluid flow Specific objectives Identify regional spatial distribution of gas flares within an area of 3000 km2 in the Barents Sea Identify and describe associated structures (i.e. pockmarks, carbonate reefs) using geomorphology Document associated structures with ...
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Nitrogen and phosphorus pollution alter the mutual relationship between corals and algae
phosphorus pollution change the relationship between the pistillata and the algae living inside its tissues, a recent study has found. The researchers say the pollutants, mainly from urban and agricultural discharges, affect algae photosynthesis and the essential transfer of carbon from algae to the coral. Nitrogen and phosphorus pollution change the relationship between the tropical coral ...
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