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1427 records – page 1 of 143.

Abandoned Mid-Canada Radar Line sites in the Western James region of Northern Ontario, Canada: a source of organochlorines for First Nations people?

https://arctichealth.org/en/permalink/ahliterature80754
Source
Sci Total Environ. 2006 Nov 1;370(2-3):452-66
Publication Type
Article
Date
Nov-1-2006
Author
Tsuji Leonard J S
Wainman Bruce C
Martin Ian D
Weber Jean-Philippe
Sutherland Celine
Nieboer Evert
Author Affiliation
Department of Environment and Resource Studies, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1. ljtsuji@2fes.uwaterloo.ca
Source
Sci Total Environ. 2006 Nov 1;370(2-3):452-66
Date
Nov-1-2006
Language
English
Publication Type
Article
Keywords
Adult
American Native Continental Ancestry Group
Animals
Birds
Diet
Environmental pollutants - blood
Female
Fishes
Food Contamination
Hazardous Waste
Humans
Hydrocarbons, Chlorinated - blood
Male
Mammals
Ontario
Abstract
The potential exists for human exposure to polychlorinated biphenyls (PCBs) and other contaminants originating from abandoned Mid-Canada Radar Line (MCRL) sites in sub-arctic Canada. We examined patterns of differences with respect to body burden of organochlorines (lipid-adjusted) between residents of the Ontario First Nations of Fort Albany (the site of MCRL Site 050) and Kashechewan (no radar base) and Hamilton (an industrial, southern Ontario community) to assess whether the presence of Site 050 influenced organochlorine body burden with respect to the people of Fort Albany. PCBs (Aroclor 1260 and summation operator14 PCBs congeners [CBs]) and DDE in the plasma of Fort Albany and Kashechewan subjects were elevated relative to Hamilton participants. PCB and DDE-plasma levels in First Nation women were of comparable magnitude to those reported for Inuit women living in the west/central Northwest Territories. Significantly lower DDE/DDT ratios observed for Fort Albany indicates exposure to higher levels of DDT compared to Kashechewan. The probable source of DDT exposure for Fort Albany people is the DDT-contaminated soil surrounding buildings of Site 050. The results of the correspondence analysis (CA) indicated that people from Hamilton had relatively higher pesticides and lower CB body burdens, while people from Fort Albany and Kashechewan exhibited relatively higher CBs and lower pesticide levels (CA-1). The separation of Fort Albany and Kashechewan from Hamilton was also clear using questionnaire data (i.e., plotting dietary principal component [PC]-1 scores against PC-2); PC-1 was correlated with the consumption of a traditional diet. Separation of Kashechewan and Albany residents occurred because the people of Kashechewan ate more traditional meats and consumed shorebirds. Only one significant relationship was found between PC analysis and contaminant loadings; PC-1 versus CA-3 for Kashechewan. The presence of Site 050 on Anderson Island appears to have influenced organochlorine body burden of the people of Fort Albany. ANCOVA results revealed that it was not activity on Anderson Island that was important, but activity on Site 050 was the influential variable. When these results are considered with the DDE/DDT ratio data and the CB 187 results (Fort Albany and Kashechewan residents differed significantly), the findings are suggestive that Site 050 did influence organochlorine body burden of people from Fort Albany.
PubMed ID
16959301 View in PubMed
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Absence attributed to incapacity and occupational disease/accidents among female and male workers in the fish-processing industry.

https://arctichealth.org/en/permalink/ahliterature203445
Source
Occup Med (Lond). 1998 Jul;48(5):289-95
Publication Type
Article
Date
Jul-1998
Author
B. Pålsson
U. Strömberg
K. Ohlsson
S. Skerfving
Author Affiliation
Department of Occupational and Environmental Medicine, University Hospital, Lund, Sweden.
Source
Occup Med (Lond). 1998 Jul;48(5):289-95
Date
Jul-1998
Language
English
Publication Type
Article
Keywords
Accidents, Occupational - statistics & numerical data
Adolescent
Adult
Aged
Animals
Female
Fishes
Food-Processing Industry
Humans
Incidence
Male
Middle Aged
Musculoskeletal Diseases - epidemiology
Occupational Diseases - epidemiology
Sex Distribution
Sick Leave - statistics & numerical data
Sweden - epidemiology
Time Factors
Abstract
Sick-leave between 1984 and 1989 was higher among both female (n = 515) and male (n = 304) fish-processing workers [observed/expected (O/E) 2.24 and 1.69, respectively] than among non-exposed groups (0.62 and 0.89). Diagnoses in the musculoskeletal system dominated (i.e., neck/upper limbs; females, exposed vs. non-exposed workers: 30 vs. 12%; males: 11 vs. 5.8%). In subjects who left employment, the O/E-ratio decreased (females: 3.02 vs. 1.55; males: 2.40 vs. 1.55). Among those women hired before the start of the observation period, exposed subjects had higher frequencies of sick-leave than non-exposed, for both total illness and musculoskeletal diagnoses. In the men, there were corresponding differences, though not fully statistically significant. Reported occupational diseases [O/E: females: 4.5; (95% confidence interval) CI = 3.2-6.1; males: 2.3; CI = 1.3-3.9] and accidents (females: 4.3; CI = 3.0-5.9; males: 1.8; CI = 1.2-2.7) were also higher in female than in male fish-processing workers, and much higher than in non-exposed workers. In conclusion, work in the fish-processing industry was associated with increased frequencies of sick-leave, especially because of diagnoses of the musculoskeletal system, and occupational disorders and accidents, in particular among female workers.
PubMed ID
9876411 View in PubMed
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Absence of cardiovascular benefits and sportfish consumption among St. Lawrence River anglers.

https://arctichealth.org/en/permalink/ahliterature182864
Source
Environ Res. 2003 Nov;93(3):241-7
Publication Type
Article
Date
Nov-2003
Author
Catherine Godin
Bryna Shatenstein
Gilles Paradis
Tom Kosatsky
Author Affiliation
Département de Médecine Sociale et préventive, Faculté de Médecine, Université de Montréal, Montreal, Quebec, Canada. catherine.godin@bigfoot.com
Source
Environ Res. 2003 Nov;93(3):241-7
Date
Nov-2003
Language
English
Publication Type
Article
Keywords
Adult
Animals
Blood pressure
Cardiovascular Diseases - prevention & control
Diet
Dietary Fats
Fatty Acids, Omega-3 - pharmacology
Fisheries
Fishes
Humans
Lipids - blood
Male
Middle Aged
Quebec
Regression Analysis
Risk factors
Seasons
Abstract
The benefits of sportfish consumption and omega-3 fatty acid (omega3-FA) intake for cardiovascular risk factors were evaluated in a sample of 112 male fishers from the St. Lawrence River in the Montreal area during the 1996 winter and fall fishing seasons. A questionnaire on fishing practices and fish consumption was administered, and fasting blood samples were collected for lipid and phospholipid determination. Linear regression analyses, which considered the confounding effect of major risk factors, did not show any significant association between measured omega3-FAs or reported fish intake and blood lipids or blood pressure. This study is limited by its low statistical power due to the small sample size and the possibility that the fish eaten by the participants were low in omega3-FAs or that the participants diets contained foods high in cholesterol-raising fat.
PubMed ID
14615233 View in PubMed
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Abundance of actinobacteria and production of geosmin and 2-methylisoborneol in Danish streams and fish ponds.

https://arctichealth.org/en/permalink/ahliterature83047
Source
FEMS Microbiol Ecol. 2005 Apr 1;52(2):265-78
Publication Type
Article
Date
Apr-1-2005
Author
Klausen Cecilie
Nicolaisen Mette H
Strobel Bjarne W
Warnecke Falk
Nielsen Jeppe L
Jørgensen Niels O G
Author Affiliation
Department of Ecology, Royal Veterinary and Agricultural University, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark.
Source
FEMS Microbiol Ecol. 2005 Apr 1;52(2):265-78
Date
Apr-1-2005
Language
English
Publication Type
Article
Keywords
Actinobacteria - genetics - isolation & purification - metabolism
Animals
Aquaculture
Bornanes - analysis - metabolism
Denmark
Fishes - physiology
Fresh Water - chemistry - microbiology
Naphthols - analysis - metabolism
Nitrogen - analysis - metabolism
Seasons
Abstract
Occurrence of the odours geosmin and 2-methylisoborneol (MIB) in freshwater environments indicates that odour-producing organisms are commonly occurring. In the present study, we assumed actinomycetes to be a major source of the odours. Seasonal concentrations of odours and abundance of Actinobacteria, which includes actinomycetes and other G+ and high GC bacteria, were determined in one oligotrophic and two eutrophic freshwater streams, as well as in aquacultures connected to these streams, in Denmark. Concentrations of geosmin and MIB ranged from 2 to 9 ng l(-1) and were lowest in the winter. Passage of stream water in the aquacultures increased the amount of geosmin and MIB by up to 55% and 110%, respectively. Densities of actinobacteria were determined by fluorescence in situ hybridization with catalyzed reporter deposition (CARD-FISH) technique and were found to make up from 4 to 38 x 10(7) cells l(-1), corresponding to 3-9% of the total bacterial populations. The lowest densities of actinobacteria occurred in the winter. Filamentous bacteria targeted by the FISH probe made up about 2.7-38% (average was 22%) of the actinobacteria and were expected to be actinomycetes. Combined microautoradiography and CARD-FISH demonstrated that 10-38% (incorporation of 3H-thymidine) and 41-65% (incorporation of 3H-leucine) of the actinobacteria were metabolically active. The proportion of active actinobacteria increased up to 2-fold during passage of stream water in the aquacultures, and up to 98% of the cells became active. Sequencing of 16S rRNA genes in 8 bacterial isolates with typical actinomycete morphology from the streams and ponds demonstrated that most of them belonged to the genus Streptomyces. The isolated actinomycetes produced geosmin at rates from 0.1 to 35 aggeosmin bacterium(-1)h(-1). MIB was produced at similar rates in 5 isolates, whereas no MIB was produced by three of the isolates. Addition of the odours to stream water demonstrated that indigenous stream bacteria were capable of reducing the odours, and that enrichment with LB medium stimulated the degradation. Our study shows that bacterial communities in freshwater include geosmin- and MIB-producing actinobacteria. However, the mechanisms controlling production as well as degradation of the odours in natural waters appear complex and require further research.
PubMed ID
16329912 View in PubMed
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Accumulated state of the Yukon River watershed: part I critical review of literature.

https://arctichealth.org/en/permalink/ahliterature121234
Source
Integr Environ Assess Manag. 2013 Jul;9(3):426-38
Publication Type
Article
Date
Jul-2013
Author
Monique G Dubé
Breda Muldoon
Julie Wilson
Karonhiakta'tie Bryan Maracle
Author Affiliation
Canadian Rivers Institute, University of New Brunswick, Alberta, Canada. Dub.mon@hotmail.com
Source
Integr Environ Assess Manag. 2013 Jul;9(3):426-38
Date
Jul-2013
Language
English
Publication Type
Article
Keywords
Alaska - epidemiology
Animal Migration
Animals
British Columbia - epidemiology
Climate change
Environment
Environmental Monitoring - methods
Fish Diseases - epidemiology - microbiology - parasitology
Fishes - physiology
Fresh Water - analysis - microbiology - parasitology
Humans
Neoplasms - chemically induced - epidemiology
Seasons
Water Movements
Water Pollutants, Chemical - analysis - metabolism - toxicity
Water Quality
Yukon Territory - epidemiology
Abstract
A consistent methodology for assessing the accumulating effects of natural and manmade change on riverine systems has not been developed for a whole host of reasons including a lack of data, disagreement over core elements to consider, and complexity. Accumulated state assessments of aquatic systems is an integral component of watershed cumulative effects assessment. The Yukon River is the largest free flowing river in the world and is the fourth largest drainage basin in North America, draining 855,000 km(2) in Canada and the United States. Because of its remote location, it is considered pristine but little is known about its cumulative state. This review identified 7 "hot spot" areas in the Yukon River Basin including Lake Laberge, Yukon River at Dawson City, the Charley and Yukon River confluence, Porcupine and Yukon River confluence, Yukon River at the Dalton Highway Bridge, Tolovana River near Tolovana, and Tanana River at Fairbanks. Climate change, natural stressors, and anthropogenic stresses have resulted in accumulating changes including measurable levels of contaminants in surface waters and fish tissues, fish and human disease, changes in surface hydrology, as well as shifts in biogeochemical loads. This article is the first integrated accumulated state assessment for the Yukon River basin based on a literature review. It is the first part of a 2-part series. The second article (Dubé et al. 2013a, this issue) is a quantitative accumulated state assessment of the Yukon River Basin where hot spots and hot moments are assessed outside of a "normal" range of variability.
PubMed ID
22927161 View in PubMed
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Accumulation and trophic transfer of organotins in a marine food web from the Danish coastal waters.

https://arctichealth.org/en/permalink/ahliterature172406
Source
Sci Total Environ. 2005 Nov 1;350(1-3):72-85
Publication Type
Article
Date
Nov-1-2005
Author
Jakob Strand
Jens A Jacobsen
Author Affiliation
National Environmental Research Institute, Department of Marine Ecology, P.O. Box 358, Frederiksborgvej 399, 4000 Roskilde, Denmark. jak@dmu.dk
Source
Sci Total Environ. 2005 Nov 1;350(1-3):72-85
Date
Nov-1-2005
Language
English
Publication Type
Article
Keywords
Animals
Birds
Denmark
Environmental monitoring
Fishes
Food chain
Fucus
Humans
Invertebrates
Male
Organotin Compounds - analysis
Phoca
Phocoena
Water Pollutants, Chemical - analysis
Zosteraceae
Abstract
The presence of organotin compounds, e.g., tributyltin (TBT) and triphenyltin (TPhT) including the di- and monosubstituted breakdown products, was studied in a representative marine food web in order to assess the accumulation potential at different trophic levels in Danish coastal waters. This included samples of two species of seaweed, four species of invertebrates, four species of fish, five species of birds and two species of mammals. All organisms were sampled away from harbour areas and the organotin concentrations found in this study can therefore be considered to reflect a general level in organisms living in Danish coastal waters. All the samples analysed contained organotin compounds. The highest hepatic concentrations of butyltins were found in flounder (60-259 ng g-1 wet weight [ww], as Sn), eider duck (12-202 ng g-1 ww) and harbour porpoise (134-2283 ng g-1 ww). The lowest concentrations were found in seaweed and a plant-feeding bird. TPhT or its degradation products were also found in most of the samples with the highest concentrations in flounder (9.8-74 ng g-1 ww), cod (23-28 ng g-1 ww) and great black-backed gull (19-24 ng g-1 ww). This indicates an input of TPhT in the region, probably from the use as antifouling agent. A high variance in accumulation potential was found between the species, even between species at the same trophic level, which probably reflects the species-specific differences in exposure routes and the capabilities to metabolise and eliminate the organotin compounds. This study gives evidence of the importance of biomagnification of butyltin in harbour porpoises and, to a lesser extent, in fish and birds.
PubMed ID
16227074 View in PubMed
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[Accumulation of radionuclides in food chains of the Yenisei River after the nuclear power plant shutdown at the mining-and-chemical enterprise].

https://arctichealth.org/en/permalink/ahliterature261756
Source
Radiats Biol Radioecol. 2014 Jul-Aug;54(4):405-14
Publication Type
Article
Author
T A Zotina
E A Trofimova
A D Karpov
A Ia Bolsunovskii
Source
Radiats Biol Radioecol. 2014 Jul-Aug;54(4):405-14
Language
Russian
Publication Type
Article
Keywords
Animals
Biota
Chemical Industry
Fishes - metabolism
Food chain
Industrial Waste - analysis
Mining
Muscle, Skeletal - radionuclide imaging
Nuclear Power Plants
Radiation Monitoring - methods
Radioisotopes - analysis - pharmacokinetics
Rivers - chemistry
Seasons
Siberia
Water Pollutants, Radioactive - analysis - pharmacokinetics
Abstract
Accumulation of artificial and natural radionuclides in the chains of food webs leading to non-predatory and piscivorous fish of the Yenisei River was investigated during one year before and three years after the shutdown of a nuclear power plant at the Mining-and-Chemical Combine (2009-2012). The activity of artificial radionuclides in the samples of biota ofthe Yenisei River (aquatic moss, gammarids, dace, grayling, pike) was estimated. The concentration of radionuclides with induced activity (51Cr, 54Mn, 58Co, 60Co, 65Zn, 141, 144Ce, 152, 154Eu, 239Np) decreased in the biomass of biota after the shutdown of the nuclear power plant; the concentration of 137Cs did not. Analysis of the accumulation factors (C(F)) allows us to expect the effective accumulation of 137Cs in the terminal level of the food web of the Yenisei River--pike (C(F) = 2.0-9.4), i.e. biomagnifications of radiocesium. Accumulation of artificial, radionuclides in non-predatory fish from gammarids was not effective (C(F)
PubMed ID
25775829 View in PubMed
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[A clinico-epidemiological study of opisthorchiasis in the Altai Territory].

https://arctichealth.org/en/permalink/ahliterature223502
Source
Med Parazitol (Mosk). 1992 Jul-Aug;(4):13-4
Publication Type
Article
Author
V V Nikitin
R T Kuimova
Source
Med Parazitol (Mosk). 1992 Jul-Aug;(4):13-4
Language
Russian
Publication Type
Article
Keywords
Animals
Carps - parasitology
Disease Reservoirs - veterinary
Fish Diseases - epidemiology - parasitology
Humans
Opisthorchiasis - drug therapy - epidemiology - transmission - veterinary
Praziquantel - therapeutic use
Siberia - epidemiology
Abstract
Eighty-eight patients with opisthorchiasis were treated with biltricide in an anthropurgic and natural focus of opisthorchiasis in the Altai Territory. A one-day course of drug therapy, in a total dose of 60 mg/kg, was administered. Forty-two patients developed side effects in the course of therapy. Complete elimination of the helminths was achieved in 83 (94.3 +/- 2.3%; p less than 0.05) patients in 6 months after therapy.
PubMed ID
1435572 View in PubMed
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Activation of potassium channels in erythrocytes of marine teleost Scorpaena porcus.

https://arctichealth.org/en/permalink/ahliterature10059
Source
Membr Cell Biol. 2001;14(6):773-82
Publication Type
Article
Date
2001
Author
Y A Silkin
E N Silkina
A O Sherstobitov
G P Gusev
Author Affiliation
Karadag Natural Reserve, Ukrainian Academy of Sciences, Feodosia, Crimean Region.
Source
Membr Cell Biol. 2001;14(6):773-82
Date
2001
Language
English
Publication Type
Article
Keywords
Animals
Calcimycin - pharmacology
Erythrocytes - metabolism
Fishes - blood
Humans
In Vitro
Ion Transport - drug effects
Ionophores - pharmacology
Lead - pharmacology
Potassium - metabolism
Potassium Channels - blood
Propranolol - pharmacology
Sodium - metabolism
Vanadates - pharmacology
Abstract
To assess the possibility of stimulating Ca2+-activated K+ channels, marine fish erythrocytes were incubated at 20-22 degrees C in saline containing a Ca2+-ATPase inhibitor (orthovanadate), a Ca2+ ionophore (A23187), propranolol or Pb2+. Incubation of the cells for up to 2 h under control conditions or in the presence of 5 mM NH4VO3 and 1 mM Ca2+ did not affect the intracellular K+ and Na+ concentrations. About 50% cellular K+ was lost from erythrocytes incubated in the presence of 0.01 mM A23187, 1 mM EGTA and 0.4-1.0 mM Ca2+. There was a significant loss of cellular K+ after the addition of 0.05-0.2 mM propranolol to the incubation medium. The stimulatory effect of propranolol on the K+ efflux was independent of external Ca2+. Blockers of Ca2+ transport, verapamil and Co2+, caused only a small decrease in the K+ loss induced by propranolol. The treatment of erythrocytes with 1-2 microM Pb2+ led to a minor K+ loss, but at a Pb2+ concentration of 20-50 microM, about 70% cellular K+ was lost. The K+ efflux induced by propranolol or Pb2+ was completely blocked by 1 mM quinine. The induced K+ loss from the erythrocytes was accompanied by a slight increase in the intracellular Na+ concentration. These data indicate the possibility of inducing Ca2+- and Pb2+-activated potassium channels in erythrocytes of S. porcus. A distinctive feature of the cells is a high sensitivity to propranolol, which activates K+ channels in the absence of external Ca2+.
PubMed ID
11817573 View in PubMed
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1427 records – page 1 of 143.