keyword
MENU ▼
Read by QxMD icon Read
search

sudbury

keyword
https://www.readbyqxmd.com/read/27268254/non-respiratory-mortality-and-cancer-incidence-in-a-cohort-of-canadian-nickel-workers
#1
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
https://www.readbyqxmd.com/read/27230027/nickel-and-copper-toxicity-and-plant-response-mechanisms-in-white-birch-betula-papyrifera
#2
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
https://www.readbyqxmd.com/read/27131821/hepatic-oxidative-stress-and-metal-subcellular-partitioning-are-affected-by-selenium-exposure-in-wild-yellow-perch-perca-flavescens
#3
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
https://www.readbyqxmd.com/read/26928564/multi-dimensional-water-quality-assessment-of-an-urban-drinking-water-source-elucidated-by-high-resolution-underwater-towed-vehicle-mapping
#4
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
https://www.readbyqxmd.com/read/26785376/similar-spectral-power-densities-within-the-schumann-resonance-and-a-large-population-of-quantitative-electroencephalographic-profiles-supportive-evidence-for-koenig-and-pobachenko
#5
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
https://www.readbyqxmd.com/read/26473705/the-impact-of-drought-and-air-pollution-on-metal-profiles-in-peat-cores
#6
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
https://www.readbyqxmd.com/read/26274843/metabolomics-confirms-that-dissolved-organic-carbon-mitigates-copper-toxicity
#7
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
https://www.readbyqxmd.com/read/26236355/antimicrobial-susceptibility-of-canadian-isolates-of-helicobacter-pylori-in-northeastern-ontario
#8
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
https://www.readbyqxmd.com/read/26160672/factors-controlling-peat-chemistry-and-vegetation-composition-in-sudbury-peatlands-after-30-years-of-pollution-emission-reductions
#9
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
https://www.readbyqxmd.com/read/26020463/using-sulfur-stable-isotopes-to-understand-feeding-behavior-and-selenium-concentrations-in-yellow-perch-perca-flavescens
#10
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
https://www.readbyqxmd.com/read/25908923/access-to-oncology-consultation-in-a-cancer-cohort-in-northeastern-ontario
#11
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
https://www.readbyqxmd.com/read/25611911/the-economic-contribution-of-the-northern-ontario-school-of-medicine-to-communities-participating-in-distributed-medical-education
#12
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
https://www.readbyqxmd.com/read/25598157/lichen-communities-along-a-pollution-gradient-40-years-after-decommissioning-of-a-cu-ni-smelter
#13
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
https://www.readbyqxmd.com/read/25596669/recovery-of-olfactory-mediated-behaviours-of-fish-from-metal-contaminated-lakes
#14
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
https://www.readbyqxmd.com/read/25485006/knowledge-attitudes-and-practice-patterns-among-healthcare-providers-in-the-prevention-of-recurrent-kidney-stones-in-northern-ontario
#15
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
https://www.readbyqxmd.com/read/25162868/evolving-the-future-of-education-problems-in-enabling-broad-social-reforms
#16
COMMENT
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
https://www.readbyqxmd.com/read/25040142/community-reintegration-of-stroke-survivors-the-effect-of-a-community-navigation-intervention
#17
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
https://www.readbyqxmd.com/read/24905257/wetlands-as-long-term-sources-of-metals-to-receiving-waters-in-mining-impacted-landscapes
#18
E J Szkokan-Emilson, S A Watmough, J M Gunn
Wetlands are prevalent in the Sudbury, Ontario region and often operate at the interface between terrestrial and aquatic ecosystems, modifying water chemistry and potentially affecting the recovery of impacted lakes. The deposition of metals and sulphur in Sudbury in 2010-2012 was far below that reported in the 1970's, but still higher than background values. Wetlands in the area have accumulated large quantities of metals, and high concentrations of these metals in streams occurred primarily in response to SO4-related acidification events or associated with high dissolved organic carbon production in early summer...
September 2014: Environmental Pollution
https://www.readbyqxmd.com/read/24859710/chemosensory-mediated-behaviors-and-gene-transcription-profiles-in-wild-yellow-perch-perca-flavescens-from-metal-contaminated-lakes
#19
Ali Azizishirazi, William A Dew, Berenice Bougas, Mehdi Dashtban, Louis Bernatchez, Greg G Pyle
The olfactory system of fish is sensitive to the toxic effects of low concentrations of contaminants. To investigate the effects of long-term metal exposure on olfaction in wild yellow perch (Perca flavescens), fish from one clean (Geneva Lake) and two metal-contaminated lakes (Ramsey and Hannah lakes) were collected in and around the metal-mining district of Sudbury, ON. Two different techniques were used to measure the effects of exposure to environmental contamination: (i) behavioral responses were recorded in response to conspecific skin extract and (ii) gene transcription differences in olfactory rosettes were characterized using a novel, 1000-candidate gene yellow perch microarray...
August 2014: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/24701686/combined-analysis-of-modeled-and-monitored-so2-concentrations-at-a-complex-smelting-facility
#20
Peter J G Rehbein, Michael G Kennedy, David J Cotsman, Madonna A Campeau, Monika M Greenfield, Melissa A Annett, Mike F Lepage
UNLABELLED: Vale Canada Limited owns and operates a large nickel smelting facility located in Sudbury, Ontario. This is a complex facility with many sources of SO2 emissions, including a mix of source types ranging from passive building roof vents to North America's tallest stack. In addition, as this facility performs batch operations, there is significant variability in the emission rates depending on the operations that are occurring. Although SO2 emission rates for many of the sources have been measured by source testing, the reliability of these emission rates has not been tested from a dispersion modeling perspective...
March 2014: Journal of the Air & Waste Management Association
keyword
keyword
57875
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"