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Ramya Narendrula-Kotha, Kabwe K Nkongolo
Metal and sulfur dioxide (SO2) contaminations in Northern Ontario (Canada), especially in the Greater Sudbury Region (GSR) caused by mining activities have resulted in severe environmental degradations. A long term restoration program has led to significant landscape changes and healthy ecosystems. The objective of this study was to assess variation in enzymatic activities and soil respiration in metal contaminated and reclaimed ecosystems. Soil analysis revealed that respiration rates were higher in metal contaminated limed soils (65ppm) compared to adjacent unlimed areas (35ppm)...
March 5, 2017: Ecotoxicology and Environmental Safety
Lynn Sudbury-Riley, Mary FitzPatrick, Peter J Schulz
BACKGROUND: The eHealth Literacy Scale (eHEALS) is one of only a few available measurement scales to assess eHealth literacy. Perhaps due to the relative paucity of such measures and the rising importance of eHealth literacy, the eHEALS is increasingly a choice for inclusion in a range of studies across different groups, cultures, and nations. However, despite its growing popularity, questions have been raised over its theoretical foundations, and the factorial validity and multigroup measurement properties of the scale are yet to be investigated fully...
February 27, 2017: Journal of Medical Internet Research
K N Kalubi, M Mehes-Smith, G Spiers, A Omri
Although a number of publications have provided convincing evidence that abiotic stresses such as drought and high salinity are involved in DNA methylation reports on the effects of metal contamination, pH, and cation exchange on DNA modifications are limited. The main objective of the present study is to determine the relationship between metal contamination and Cation exchange capacity (CEC) on whole DNA modifications. Metal analysis confirms that nickel and copper are the main contaminants in sampled sites within the Greater Sudbury Region (Ontario, Canada) and liming has increased soil pH significantly even after 30 years following dolomitic limestone applications...
April 2017: Ecotoxicology
Nancy E Lightfoot, Colin J Berriault, Steven K Seilkop, Bruce R Conard
Mortality and cancer incidence were examined for an updated cohort of non-sinter nickel workers in Sudbury and Port Colborne, Ontario, Canada. Abstract results are provided for those with ≥15 years since first exposure. For circulatory disease mortality, significant elevations were observed overall in many Sudbury work areas and in Port Colborne staff. Underground miners, with first exposure before 1960, displayed significant elevations for pneumoconiosis, as well as silicosis and anthrasilicosis, likely due to crystalline silica...
June 7, 2016: Archives of Environmental & Occupational Health
Gabriel Theriault, Kabwe Nkongolo
Nickel (Ni) and copper (Cu) are the most prevalent metals found in the soils in the Greater Sudbury Region (Canada) because of smelting emissions. The main objectives of the present study were to (1) determine the toxicity of nickel (Ni) and copper (Cu) at different doses in Betula papyrifera (white birch), (2) Characterize nickel resistance mechanism, and (3) assess segregating patterns for Ni and Cu resistance in B. papyrifera populations. This study revealed that B. papyrifera is resistant to Ni and Cu concentrations equivalent to the levels reported in metal-contaminated stands in the GSR...
August 2016: Bulletin of Environmental Contamination and Toxicology
Dominic E Ponton, Antoine Caron, Landis Hare, Peter G C Campbell
Yellow perch (Perca flavescens) collected from 11 lakes in the Canadian mining regions of Sudbury (Ontario) and Rouyn-Noranda (Quebec) display wide ranges in the concentrations of cadmium (Cd), nickel (Ni), selenium (Se), and thallium (Tl) in their livers. To determine if these trace elements, as well as copper (Cu) and zinc (Zn), are causing oxidative stress in these fish, we measured three biochemical indicators (glutathione (GSH), glutathione disulfide (GSSG) and thiobarbituric acid-reactive substances (TBARS)) in their livers...
July 2016: Environmental Pollution
Alan Lock, Graeme Spiers, Blair Hostetler, James Ray, Dirk Wallschläger
Spatial surveys of Ramsey Lake, Sudbury, Ontario water quality were conducted using an innovative underwater towed vehicle (UTV) equipped with a multi-parameter probe providing real-time water quality data. The UTV revealed underwater vent sites through high resolution monitoring of different spatial chemical characteristics using common sensors (turbidity, chloride, dissolved oxygen, and oxidation/reduction sensors) that would not be feasible with traditional water sampling methods. Multi-parameter probe vent site identification is supported by elevated alkalinity and silica concentrations at these sites...
April 15, 2016: Water Research
Kevin S Saroka, David E Vares, Michael A Persinger
In 1954 and 1960 Koenig and his colleagues described the remarkable similarities of spectral power density profiles and patterns between the earth-ionosphere resonance and human brain activity which also share magnitudes for both electric field (mV/m) and magnetic field (pT) components. In 2006 Pobachenko and colleagues reported real time coherence between variations in the Schumann and brain activity spectra within the 6-16 Hz band for a small sample. We examined the ratios of the average potential differences (~3 μV) obtained by whole brain quantitative electroencephalography (QEEG) between rostral-caudal and left-right (hemispheric) comparisons of 238 measurements from 184 individuals over a 3...
2016: PloS One
Laura Souter, Shaun A Watmough
Peat cores have long been used to reconstruct atmospheric metal deposition; however, debate remains regarding how well historical depositional patterns are preserved in peat. This study examined peat cores sampled from 14 peatlands in the Sudbury region of Ontario, Canada, which has a well-documented history of acid and metal deposition. Copper (Cu) and lead (Pb) concentrations within individual peat cores were strongly correlated and were elevated in the upper 10 cm, especially in the sites closest to the main Copper Cliff smelter...
January 15, 2016: Science of the Total Environment
Nadine S Taylor, Jennifer A Kirwan, Norman D Yan, Mark R Viant, John M Gunn, James C McGeer
Reductions in atmospheric emissions from the metal smelters in Sudbury, Canada, produced major improvements in acid and metal contamination of local lakes and indirectly increased dissolved organic carbon (DOC) concentrations. Metal toxicity, however, has remained a persistent problem for aquatic biota. Integrating high-throughput, nontargeted mass spectrometry metabolomics with conventional toxicological measures elucidated the mediating effects of dissolved organic matter (DOM) on the toxicity of Cu to Daphnia pulex-pulicaria, a hybrid isolated from these soft water lakes...
March 2016: Environmental Toxicology and Chemistry
Nelson F Eng, Gustavo Ybazeta, Katrina Chapman, Nya L Fraleigh, Rebecca Letto, Eleonora Altman, Francisco Diaz-Mitoma
BACKGROUND: Helicobacter pylori plays a significant role in gastritis and ulcers. It is a carcinogen as defined by the WHO, and infection can result in adenocarcinomas and mucosa-associated lymphoid tissue lymphomas. In Canada, rates of antimicrobial resistance are relatively unknown, with very few studies conducted in the past 15 years. OBJECTIVE: To examine rates of resistance in Sudbury, Ontario, compare antimicrobial susceptibility methods and attempt to determine the molecular basis of antibiotic resistance...
May 2015: Canadian Journal of Infectious Diseases & Medical Microbiology
Sophie E Barrett, Shaun A Watmough
The objective of this research was to assess factors controlling peat and plant chemistry, and vegetation composition in 18 peatlands surrounding Sudbury after more than 30 years of large (>95%) pollution emission reductions. Sites closer to the main Copper Cliff smelter had more humified peat and the surface horizons were greatly enriched in copper (Cu) and nickel (Ni). Copper and Ni concentrations in peat were significantly correlated with that in the plant tissue of Chamaedaphne calyculata. The pH of peat was the strongest determining factor for species richness, diversity, and community composition, although percent vascular plant cover was strongly negatively correlated with surface Cu and Ni concentrations in peat...
November 2015: Environmental Pollution
Dominic E Ponton, Landis Hare
We measured selenium (Se) concentrations in yellow perch (Perca flavescens) muscle and their prey collected from four Se-contaminated lakes located near metal smelters in the eastern Canadian cities of Sudbury and Rouyn-Noranda. Yellow perch Se concentrations were related to their weight in two of the four lakes. Measurements of sulfur stable isotopes (δ(34)S) in yellow perch muscle and stomach contents showed that larger fish tended to feed less on zooplankton and more on benthic invertebrates than did smaller fish...
July 7, 2015: Environmental Science & Technology
M Conlon, M Hartman, B Ballantyne, N Aubin, M Meigs, A Knight
BACKGROUND: To enhance cancer symptom management for residents of Sudbury-Manitoulin District, an ambulatory palliative clinic (pac) was established at the Northeast Cancer Centre of Health Sciences North. The pac is accessed from a medical or radiation oncology consultation. The primary purpose of the present population-based retrospective study was to estimate the percentage of cancer patients who died without ever having a medical or radiation oncology consultation. A secondary purpose was to determine factors associated with never having received one of those specialized consultations...
April 2015: Current Oncology
John C Hogenbirk, David R Robinson, Mary Ellen Hill, Raymond W Pong, Bruce Minore, Ken Adams, Roger P Strasser, Joe Lipinski
INTRODUCTION: The economic contribution of medical schools to major urban centres can be substantial, but there is little information on the contribution to the economy of participating communities made by schools that provide education and training away from major cities and academic health science centres. We sought to assess the economic contribution of the Northern Ontario School of Medicine (NOSM) to northern Ontario communities participating in NOSM's distributed medical education programs...
2015: Canadian Journal of Rural Medicine
Lyndsay J Schram, Christopher Wagner, Richard Troy McMullin, Madhur Anand
Pollution control initiatives in Greater Sudbury, Ontario, Canada, resulted in the decommissioning of the Coniston Smelter in 1972. The last assessment of the effects from the smelter on the surrounding lichen biota was in 1990, which showed an overall improvement in richness following these initiatives, but still few species were present close to the smelter. We examined five sites along this gradient to determine if this pattern is still present on the landscape. Sixty-four macrolichen species in 15 genera were found...
June 2015: Environmental Science and Pollution Research International
Ali Azizishirazi, Greg G Pyle
Fish mediate many biological processes by olfaction, which can be impaired by contaminants (i.e. metals). While the olfactory recovery of fish from metal contaminated lakes if subsequently cultured in clean water has been shown at the neurophysiological level, the recovery potential of olfactory mediated behaviours remains unknown. To study behavioural recovery of fish from metal contaminated lakes, wild yellow perch (Perca flavescens) were collected from two metal-contaminated lakes (Ramsey and Hannah lakes) in the metal-mining district of Sudbury, ON, Canada and cultured in clean water from a reference lake (Geneva Lake) for another 24 h...
July 2015: Bulletin of Environmental Contamination and Toxicology
Derek Bos, Emmanuel Abara, Malvinder S Parmar
INTRODUCTON: Kidney stone recurrence is common. Preventive measures can lead to improved quality of life and costs savings to the individual and healthcare system. Guidelines to prevent recurrent kidney stones are published by various urological societies. Adherence to guidelines amongst healthcare professionals in general is poor, while adherence to preventive management guidelines regarding stone disease is unknown. To understand this issue, we conducted an online study to assess the knowledge, attitudes, and practice patterns of healthcare practitioners in Northern Ontario...
November 2014: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
Peter Gray
The apparent success of the Sudbury Valley School, coupled with its lack of impact on the larger culture, is used here to illustrate general constraints on managed change at the large-population level. Government regulations preventing innovation, the difficulty of bucking social norms, and the inadequacy of current indices of success operate against beneficial educational change in the larger culture.
August 2014: Behavioral and Brain Sciences
Phyllis Montgomery, Darren Jermyn, Patricia Bailey, Parveen Nangia, Mary Egan, Sharolyn Mossey
AIM: The overall aim of the proposed study is to examine a newly implemented navigation intervention intended to support stroke survivors' community integration during the first year following hospital discharge in four regions of Ontario, Canada. BACKGROUND: Stroke is a leading cause of disability worldwide. Stroke survivors living in the community require regular, ongoing follow-up to assess recovery, prevent deterioration and maximize health outcomes. Internationally published evidence, often conducted in large urban centres, suggests that community reintegration services are an important component of the continuum of care for stroke survivors...
January 2015: Journal of Advanced Nursing
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