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PubMed Journals Articles About "Important Process Fueling Harmful Algal Blooms Investigated Canadian" - Page: 3 RSS

03:20 EST 13th December 2018 | BioPortfolio

Important Process Fueling Harmful Algal Blooms Investigated Canadian PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Important Process Fueling Harmful Algal Blooms Investigated Canadian articles that have been published worldwide.

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Showing "important process fueling harmful algal blooms investigated Canadian" PubMed Articles 51–75 of 40,000+

The Metabolic Capability and Phylogenetic Diversity of Mono Lake During a Bloom of the Eukaryotic Phototroph strain ML.

Algal blooms in lakes are often associated with anthropogenic eutrophication; however, they can occur without the human introduction of nutrients to a lake. A rare bloom of the alga Picocystis strain ML occurred in Spring of 2016 at Mono Lake, a hyperalkaline lake in California, which was also at the apex of a multi-year long drought. These conditions presented a unique sampling opportunity to investigate microbiological dynamics and potential metabolic function during an intense natural algal bloom. We con...


Growth and Toxin Production of spp. Can Be Regulated by Quorum-Sensing Bacteria.

spp. are the major culprit responsible for global ciguatera fish poisoning (CFP). At present, the effects of microbiological factors on algal proliferation and toxin production are poorly understood. To evaluate the regulatory roles of quorum-sensing (QS) bacteria in the physiology of , co-culture experiments with screened QS strains were conducted in this study. Except for the growth-inhibiting effect from the strain , the algal host generally displayed much higher growth potential and toxin production abi...

Molecular recognition of the beta-glucans laminarin and pustulan by a SusD-like glycan binding protein of a marine Bacteroidetes.

Marine bacteria catabolize carbohydrate polymers of algae, which synthesize these structurally diverse molecules in ocean surface waters. Although algal glycans are an abundant carbon and energy source in the ocean, the molecular details that enable specific recognition between algal glycans and bacterial degraders remain largely unknown. Here we characterized a surface protein, GMSusD from the planktonic Bacteroidetes-Gramella sp. MAR_2010_102 that thrives during algal blooms. Our biochemical and structura...


Child maltreatment and adult multimorbidity: results from the Canadian Community Health Survey.

This study investigated associations between three types of child maltreatment (exposure to intimate partner violence, sexual, and physical abuse) and multimorbidity (chronic physical conditions, pain conditions, and mental disorders) in adults.

Physical literacy levels of Canadian children aged 8-12 years: descriptive and normative results from the RBC Learn to Play-CAPL project.

The current physical literacy level of Canadian children is unknown. The Royal Bank of Canada (RBC) Learn to Play - Canadian Assessment of Physical Literacy (CAPL) project, which is anchored in the Canadian consensus statement definition of physical literacy, aimed to help establish the current physical literacy level of Canadian children.

Microbial Community Structure and Associations During a Marine Dinoflagellate Bloom.

Interactions between microorganisms and algae during bloom events significantly impacts their physiology, alters ambient chemistry, and shapes ecosystem diversity. The potential role these interactions have in bloom development and decline are also of particular interest given the ecosystem impacts of algal blooms. We hypothesized that microbial community structure and succession is linked to specific bloom stages, and reflects complex interactions among taxa comprising the phycosphere environment. This inv...

Spatio-temporal patterns of Ulva prolifera blooms and the corresponding influence on chlorophyll-a concentration in the Southern Yellow Sea, China.

The world's largest macroalgal blooms (MABs) caused by the Ulva prolifera outbreaks have occurred every summer since 2007 in the Southern Yellow Sea, China. Accumulating evidence showed that MABs may deteriorate the regional marine environment and influence the growth of some primary producers such as phytoplankton. In this study, we investigated the spatio-temporal patterns of U. prolifera green tides and chlorophyll-a concentration in the Southern Yellow Sea in 2015 using satellite images obtained from HJ...

Microcystin-LR affects the hypothalamic-pituitary-inter-renal (HPI) axis in early life stages (embryos and larvae) of zebrafish.

Frequencies and durations of blooms of cyanobacteria are increasing. Some cyanobacteria can produce cyanotoxins including microcystins (MCs). MCs are the most common toxic products of hazardous algal blooms (HABs), with the greatest potential for exposure and to cause toxicity. Recently, MCs have been shown to disrupt endocrine functions. In this study, for the first time, effects of MC-LR on the hypothalamic-pituitary-inter-renal (HPI) axis during early embryonic development (embryos/larvae) of zebrafish (...

Trends in cannabis use over time among Canadian youth: 2004-2014.

Cannabis is the most commonly used illicit substance among Canadian youth. The current study examined national trends in cannabis use among Canadian youth from 2004/05 to 2014/15 using nationally representative data from the Canadian Student Tobacco, Alcohol and Drugs Survey (CSTADS). Data were collected from students in Grades 7 to 12 as part of the Canadian Student Tobacco, Alcohol and Drugs Survey (formerly the Youth Smoking Survey) using a repeat-cross sectional survey across 6 biennial survey waves bet...

The dual function of the algal treatment: Antibiotic elimination combined with CO fixation.

The study provided an algal treatment to achieve dual function with antibiotic elimination and CO fixation simultaneously. Two widely used antibiotics, cefradine and amoxicillin were selected as the target compounds. First of all, we assessed the influence of light intensity on algal growth and antibiotic removal efficiency to obtain the optimal light intensity. Secondly, after the algal antibiotic treatment, the CO capture capacities at varied CO volume concentrations were assessed and compared. Significan...

CH Fluxes During the Algal Bloom in the Pengxi River.

Emissions of greenhouse gases in the Three Gorges Reservoir have been attracting attention in the recent years. This study was conducted to reveal the CH emission and removal during the process of algal growth at different nitrogen and phosphorus concentrations in the Pengxi River in the Three Gorges Reservoir. In-situ field experiments were conducted in the Gaoyang Lake in Pengxi River. From April 22nd, 2016, to May 9th, 2016, different concentrations of nitrogen and phosphorus were added to different expe...

Improving patient outcomes and radiotherapy systems: A pan-Canadian approach to patient-reported outcome use.

Standardized collection and use of clinical patient-reported outcomes (PRO) have potential to benefit the care of individual patients and improve radiotherapy system performance. Its centralized health-care system makes Canada a prime candidate to take a leader and collaborator role in international endeavors to promote expansion of patient-reported outcome collection and use in radiotherapy. The current review discusses the development of a pan-Canadian approach to PRO use, through a quality improvement in...

Knowledge brokering: (mis)aligning population knowledge with care of fat bodies.

Two prominent Canadian knowledge brokers aim to influence how primary care clinicians address obesity, through the dissemination of texts: the Canadian Task Force on Preventive Health Care (guideline) and the Canadian Obesity Network (5As). While written for the same clinician and adult patient population, the recommendations differ. This analysis highlights active decisions that produced the difference.

Towards equity-focused intersectoral practice (EquIP) in children's environmental health and housing: the transformational story of RentSafe.

This paper chronicles the transformational process through which a national intersectoral collaboration, the Canadian Partnership for Children's Health and Environment (CPCHE), came to embrace a more upstream, equity-based focus in its mandate to advance children's environmental health.

Sexual orientation and alcohol-related harms in Canadian youth.

To determine associations between experiencing alcohol-related harm, sex, and sexual orientation among Canadian high school students.

Simple and practical on-site treatment of high microcystin levels in water using polypropylene plastic.

Microcystin (MC) is a hepatotoxin produced by various cyanobacteria during harmful algal blooms (HAB's) in freshwater environments. Advanced treatment methods can remove MC from drinking water, but are costly and do not address recreational water exposure and ecosystem health concerns. Here we investigate the feasibility of utilizing plastics as a MC-adsorbing material, for use in water resources used for recreation, agriculture, aquaculture and drinking water. Water containing 20 µg/L MC-LR was exposed t...

A comprehensive analysis of biosorption of metal ions by macroalgae using ICP-OES, SEM-EDX and FTIR techniques.

In the present study, a comprehensive approach to the biosorption process was proposed. Biosorption of Cr(III), Mn(II) and Mg(II) ions by a freshwater macroalga Cladophora glomerata was examined using several advanced techniques including FTIR (Fourier Transform Infrared Spectroscopy), ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometry) and SEM-EDX (Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy). The enriched biomass can become a valuable, bioactive feed additive for ...

On the Simultaneous Identification and Quantification of Microalgae Populations Based on Fluorometric Techniques.

In this study, the phytoplankton structure of a freshwater reservoir located in central Argentina (Embalse Río Tercero) was analyzed using Beutler's method (Photosynthesis Research 72: 39-53, 2002), aiming to provide water quality control agencies with a reliable tool for early detection of algae blooms, particularly cyanobacteria. The method estimates the concentration of chlorophyll a (Chl a) contributed by individual algal groups in a real sample by fitting its fluorescence excitation spectrum to a line...

Solvent-free lignin recovered by thermal-enzymatic treatment using fixed-bed reactor technology - Economic assessment.

The economic viability of producing lignin by thermal-enzymatic treatment in a high-pressure fixed-bed reactor is investigated for the first time. In this direction, different advantages (e.g. recovery of low-odor sulfur-free lignin, high process flexibility) and disadvantages (e.g. high investment for high-pressure equipment) of this technology are considered. Regarding process flexibility, four different operating modes (i.e. flow through, circulation) are investigated by varying process parameters and ap...

Linking patterns of net community production and marine microbial community structure in the western North Atlantic.

Marine net community production (NCP) tracks uptake of carbon by plankton communities and its potential transport to depth. Relationships between marine microbial community composition and NCP currently remain unclear despite their importance for assessing how different taxa impact carbon export. We conducted 16 and 18S rRNA gene (rDNA) sequencing on samples collected across the Western North Atlantic in parallel with high-resolution O/Ar-derived NCP measurements. Using an internal standard technique to est...

Effects of aqueous extracts from the rhizome of Pontederia cordata on the growth and interspecific competition of two algal species.

Single and co-culture systems of Microcystis aeruginosa and Scenedesmus obliquus were prepared with different initial algal densities and treated with different concentrations of aqueous extracts from the rhizome of Pontederia cordata to study its inhibitory effect on algal growth and the competitive relationship between these two algal species. The results showed that aqueous extracts could inhibit the growth of M. aeruginosa and S. obliquus, and the inhibition rate of aqueous extracts on the growth of M. ...

Experimental studies on zeta potential of flocculants for harvesting of algae.

An experimental study was performed to evaluate the comparative efficiency of bio-flocculant (waste egg shell), laboratory available calcium carbonate (LACC) and alum (Al (SO)) for harvesting of unicellular microalga, Chlorella pyrenoidosa. The influence of pH on zeta potential (ζ) was also studied to explain the chemistry of flocculation process. The maximum harvesting efficiency (99%) was obtained with alum with deformities in algal cell surfaces. Waste egg-shell material is developed as a low-cost bio-f...

Microbial community and functions associated with digestion of algal polysaccharides in the visceral tract of Haliotis discus hannai: Insights from metagenome and metatranscriptome analysis.

Haliotis discus hannai, a species of Pacific abalone, is a highly valuable food source throughout Northeast Asia. As H. discus hannai primarily feed on brown algae and largely extract their energy from algal polysaccharides, understanding the mechanisms by which they digest algal polysaccharides is essential for elucidating their energy metabolism. Gut microbes, as well as the host animal, are involved in the process of polysaccharide degradation. To identify algal polysaccharide-digestion mechanisms and th...

Exploratory study on modification of sludge-based activated carbon for nutrient removal from stormwater runoff.

Nutrients (P, N) in stormwater runoff are a major cause of eutrophication and algal blooms. A promising solution to this problem is to amend the rain garden growing medium (RGGM) with sewage sludge-based activated carbon (SBAC). To optimize the SBAC production process, different metals, pyrolysis conditions (temperature, heating time, carrier gas), and post-treatments were explored. When pyrolyzed at 400 °C for two hours, Zn-activated SBAC removed up to 41% of PO-P (initial concentration of 1 mg/L) and...

Impact of eutrophication on arsenic cycling in freshwaters.

Many arsenic-bearing freshwaters are facing with eutrophication and consequent algae-induced anoxia/hypoxia events. However, arsenic cycling in eutrophic waters and its impact on public health are poorly understood. Laboratory simulation experiments are performed in this study to investigate the effect of algal blooms on the cycling of arsenic in a sediment-water-air system. We found that the anoxia induced by the degradation of algal biomass promoted an acute arsenic (mostly As(III)) release within two day...


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