| 1. |
- Sandin, Per, et al.
(författare)
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Precautionary defaults - A new strategy for chemical risk management
- 2004
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Ingår i: Human and Ecological Risk Assessment. - : Informa UK Limited. - 1080-7039 .- 1549-7860. ; 10, s. 1-18
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Tidskriftsartikel (refereegranskat)abstract
- In order to give adequate support to risk managers, new risk assessment methods should be developed that are (1) scientifically sound, (2) simplified, and (3) suited for precautionary risk management. In this Perspective we propose that the notion of a precautionary default can be a useful tool in the development of such methods. A precautionary default is a cautious or pessimistic assumption that is used in the absence of adequate information and that should be replaced when such information is obtained. Furthermore, we point out some promising research areas for the development of such indicators, viz. connections between chemical characteristics such as persistence and effect parameters, monitoring of contaminants in polar regions, monitoring of contaminants in breast milk, application of results from (human) toxicology in ecotoxicology and vice versa, (eco) toxicological test systems that are sensitive to effects on reproduction, and the application of bioinformatic methods to complex data, both in genomic research and in ecotoxicology. We conclude that precautionary decision-making does not require less science, but to the contrary it requires more science and improved communication between scientists and risk managers.
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| 2. |
- Larsson, Per, et al.
(författare)
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Atmospheric transport of persistent pollutants governs uptake by Holarctic biota
- 1990
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Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 24:10, s. 1599-1601
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Tidskriftsartikel (refereegranskat)abstract
- The atmospheric deposition of PCBs, DDT, and lindane,governed uptake in terrestrial biota in the Scandinavianpenninsula. Mammalian herbivores and predators as wellas predatory insects contained higher levels of pollutantsat locations where the fallout load was high than at stationswhere atmospheric deposition was lower, and the twovariables were significantly correlated.
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| 3. |
- Ademuyiwa, Adesoji O., et al.
(författare)
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Determinants of morbidity and mortality following emergency abdominal surgery in children in low-income and middle-income countries
- 2016
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Ingår i: BMJ Global Health. - : BMJ Publishing Group Ltd. - 2059-7908. ; 1:4
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Tidskriftsartikel (refereegranskat)abstract
- Background: Child health is a key priority on the global health agenda, yet the provision of essential and emergency surgery in children is patchy in resource-poor regions. This study was aimed to determine the mortality risk for emergency abdominal paediatric surgery in low-income countries globally.Methods: Multicentre, international, prospective, cohort study. Self-selected surgical units performing emergency abdominal surgery submitted prespecified data for consecutive children aged <16 years during a 2-week period between July and December 2014. The United Nation's Human Development Index (HDI) was used to stratify countries. The main outcome measure was 30-day postoperative mortality, analysed by multilevel logistic regression.Results: This study included 1409 patients from 253 centres in 43 countries; 282 children were under 2 years of age. Among them, 265 (18.8%) were from low-HDI, 450 (31.9%) from middle-HDI and 694 (49.3%) from high-HDI countries. The most common operations performed were appendectomy, small bowel resection, pyloromyotomy and correction of intussusception. After adjustment for patient and hospital risk factors, child mortality at 30 days was significantly higher in low-HDI (adjusted OR 7.14 (95% CI 2.52 to 20.23), p<0.001) and middle-HDI (4.42 (1.44 to 13.56), p=0.009) countries compared with high-HDI countries, translating to 40 excess deaths per 1000 procedures performed.Conclusions: Adjusted mortality in children following emergency abdominal surgery may be as high as 7 times greater in low-HDI and middle-HDI countries compared with high-HDI countries. Effective provision of emergency essential surgery should be a key priority for global child health agendas.
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| 4. |
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| 5. |
- Larsson, Per, et al.
(författare)
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Differences in uptake of pesistent pollutants for predators feeding in aquatic and terrestrial habitats
- 1990
-
Ingår i: Holarctic ecology. - 0105-9327. ; 13, s. 149-155
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Tidskriftsartikel (refereegranskat)abstract
- Persistent pollutants in mustelid species( e.g. otter, mink, marten) were investigated. For a given animal, concentration of PCB and DDT in muscle were correlated with concentrations in its anal gland secretion. The correlation suggests that small samples of secretion could be used for pollutant analysis thereby eliminating the need to sacrifice animals. There was also a correlation between muscle and liver concentrations of these compounds, indicating a partitioning between different organs. Furthermore we showed that habitat differences between species led to interspecific variation in the uptake of persistent pollutants. Mink, which mainly feed in aquatic environments contained a higher proportion of p,p-DDT than marten, which feeds on terrestrial prey. Differences in PCB uptake were also noted between the two predators, though the congener distribution was heavily domined by a few hexa- and heptachlorobiphenyls.
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| 6. |
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| 7. |
- Pirzadeh, Parndis, et al.
(författare)
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Effects of the brominated flame retardant HBCDD on the structure of natural brackish water plankton communities
- 2004
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Ingår i: Proc. SETAC conference in Prague, 2004. - : Setac-Press. ; , s. 1-
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Hexabromocyclododecane (HBCDD) is a brominated flame retardant which is a prioritised substance within the Programme of Existing Substances in the EU. A recent extensive study in Sweden reported traces of the substance in all analysed media both in the environment and in biota. There are no studies, prior to this, on the effect of the compound on brackish water ecosystems. In this study, the ecotoxicity of the compound was investigated in brackish water microcosms (10 l) with natural plankton communities. The communities emerged from sediment and water collected in Öresund. 7 days after the composition of the test-systems they were exposed to the nominal concentrations 50, 100 and 400 μg/l of HBCDD. The zooplankton community was dominated by calanoid copepods and pelagic and semi-benthic rotifers. The direct toxicity of HBCDD resulted in a significant decrease in the abundance of crustacean zooplankton in all tested concentrations, whereas the rotifers were unaffected by the exposure. The total phytoplankton abundance (here including ciliates) increased for all concentrations of HBCDD, probably due to decreased grazing by zooplankton. In total, 7 species of phytoplankton were affected. We conclude from this study that HBCDD has the potential to induce profound changes in thecomposition of natural plankton communities at low (ppb) concentrations.
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| 8. |
- Tønning, Kathe, et al.
(författare)
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Kortlægning og afgivelse samt sundhedsmæssig vurdering af kemiske stoffer i babyprodukter
- 2008
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Rapport (populärvet., debatt m.m.)abstract
- Several baby products are intended to more or less to get in direct contact with baby skin or be in close contact to the skin. Moistening in the form of water, saliva, sweat or urine may cause that substances contained in the products, which can be released to these liquids, may get into contact with the skin or mouth of the baby. Besides uptake of chemical substances through the skin and from the baby sucking on the material exposure may also take place by inhaling of gasses slowly released/evaporating from the baby product of dusty particles and fibres released during use. The products included in the examination are primarily baby products intended for at children at the age of 0 to 1 year. Baby products have been deliberately selected that based on information from retailers are sold to a reasonable extent. The project primarily concerned products of textile or plastic with an upholstery or padding. In addition also baby products of flexible foam material were included. Baby clothing, bed linen (bolster case), shaped plastic objects (bath tubs, chamber pots, comforters, and baby plates), baby cutlery, and toys, wooden beds (cots) and baby care agents/remedies were not included in the project.
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| 9. |
- Wendt-Rasch, Lina, et al.
(författare)
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The effects of a pesticide mixture on aquatic ecosystems differing in trophic status: responses of the macrophyte Myriophyllum spicatum and the periphytic algal community
- 2004
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Ingår i: Ecotoxicology and Environmental Safety. - : Elsevier BV. - 0147-6513. ; 57:3, s. 383-398
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Tidskriftsartikel (refereegranskat)abstract
- The effects of a pesticide mixture (asulam, fluazinam, lambda-cyhalothrin, and metamitron) on aquatic ecosystems were investigated in 20 outdoor aquatic microcosms. Ten of the microcosms simulated mesotrophic aquatic ecosystems dominated by submerged macrophytes (Elodea). The others simulated eutrophic ecosystems with a high Lemna surface coverage (Lemna). This paper describes the fate of the chemicals as well as their effects on the growth of Myriophyllum spicatum and the periphytic algal community. In the Elodea-dominated microcosms significant increase in the biomass and alterations of species composition of the periphytic algae were observed, but no effect on M. spicatum growth could be recorded in response to the treatment. The opposite was found in the Lemna-dominated microcosms, in which decreased growth of M. spicatum was observed but no alterations could be found in the periphytic community. In the Elodea-dominated microcosms the species composition of the periphytic algae diverged from that of the control following treatment with 0.5% spray drift emission of the label-recommended rate (5% for lambda-cyhalothrin), while reduced growth of M. spicatum in the Lemna-dominated microcosms was recorded at 2% drift (20% for lambda-cyhalothrin). This study shows that the structure of the ecosystem influences the final effect of pesticide exposure. (C) 2003 Elsevier Inc. All rights reserved.
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| 10. |
- Woin, Per
(författare)
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Aquatic ecosystems - Reports of the breakout groups
- 2005
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Ingår i: Effects of Pesticides in the Field. - Brussels : Society of Environmental Toxicology and Chemistry (SETAC). - 1880611813 ; , s. 113-123
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Bokkapitel (populärvet., debatt m.m.)abstract
- Information in this book was obtained from individual experts and highly regarded sources. It is the publisher’s intent to print accurate and reliable information, and numerous references are cited; however, the authors, editors, and publisher can not be responsible for the validity of all information presented here or for the consequences of its use. Information contained herein does not necessarily reflect the policy or views of the Society of Environmental Toxicology and Chemistry. This book presents the proceedings of a SETAC Workshop convened by the Society of Environmental Toxicology and Chemistry (SETAC) and the European Union in Le Croisic, France, in October 2003. The 77 scientists involved in this workshop represented 17 countries from Europe, the United States and Canada and offered expertise in ecology, ecotoxicology, environmental regulation, and risk assessment.
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