排序方式: 共有24条查询结果,搜索用时 923 毫秒
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Joke Muys Yves Jacquemyn Bettina Blaumeiser Laura Bourlard Nathalie Brison Saskia Bulk Patrizia Chiarappa Anne De Leener Marjan De Rademaeker Julie Désir Anne Destrée Koenraad Devriendt Annelies Dheedene Armelle Duquenne Annelies Fieuw Erik Fransen Jean-Stéphane Gatot Mauricette Jamar Sandra Janssens Jorien Kerstjens Kathelijn Keymolen Damien Lederer Björn Menten Bruno Pichon Sonia Rombout Yves Sznajer Ann Van Den Bogaert Kris Van Den Bogaert Joris Vermeesch Katrien Janssens 《黑龙江环境通报》2020,40(10):1272-1283
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Levels of PCDDs, PCDFs and dioxin-like PCBs in raw cow's milk collected in France in 2006 总被引:2,自引:0,他引:2
Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) as well as polychlorinated biphenyls (PCBs) are widespread environmental contaminants. A French national survey was carried out in April 2006 to assess the concentrations of PCDD/Fs and dioxin-like PCBs (DL-PCBs) in raw cow's milk. A random sampling scheme stratified by region was applied to collect 239 raw milk samples from 93 plants belonging to 17 dairy companies. Compared to a previous survey led in 1998 analyzing half-skimmed drinking milk in France, the PCDD/Fs level was cut by half, with an average concentration of 0.33 pg toxic equivalent (TEQ)/g fat in 2006. The mean DL-PCBs concentration was 0.57 pg TEQ/g fat and subsequently the sum of PCDD/Fs and DL-PCBs was 0.90 pg/g fat, values below the thresholds defined by the European Union regulations. 相似文献
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Joke Muys Bettina Blaumeiser Yves Jacquemyn Claude Bandelier Nathalie Brison Saskia Bulk Patrizia Chiarappa Winnie Courtens Anne De Leener Marjan De Rademaeker Julie Désir Anne Destrée Koenraad Devriendt Annelies Dheedene Annelies Fieuw Erik Fransen Jean-Stéphane Gatot Philip Holmgren Mauricette Jamar Sandra Janssens Kathelijn Keymolen Damien Lederer Björn Menten Marije Meuwissen Benoit Parmentier Bruno Pichon Sonia Rombout Yves Sznajer Ann Van Den Bogaert Kris Van Den Bogaert Olivier Vanakker Joris Vermeesch Katrien Janssens 《黑龙江环境通报》2018,38(13):1120-1128
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Modelling of stable isotope fractionation by methane oxidation and diffusion in landfill cover soils 总被引:2,自引:0,他引:2
Mahieu K De Visscher A Vanrolleghem PA Van Cleemput O 《Waste management (New York, N.Y.)》2008,28(9):1535-1542
A technique to measure biological methane oxidation in landfill cover soils that is gaining increased interest is the measurement of stable isotope fractionation in the methane. Usually to quantify methane oxidation, only fractionation by oxidation is taken into account. Recently it was shown that neglecting the isotope fractionation by diffusion results in underestimation of the methane oxidation. In this study a simulation model was developed that describes gas transport and methane oxidation in landfill cover soils. The model distinguishes between (12)CH(4), (13)CH(4), and (12)CH(3)D explicitly, and includes isotope fractionation by diffusion and oxidation. To evaluate the model, the simulations were compared with column experiments from previous studies. The predicted concentration profiles and isotopic profiles match the measured ones very well, with a root mean square deviation (RMSD) of 1.7vol% in the concentration and a RMSD of 0.8 per thousand in the delta(13)C value, with delta(13)C the relative (13)C abundance as compared to an international standard. Overall, the comparison shows that a model-based isotope approach for the determination of methane oxidation efficiencies is feasible and superior to existing isotope methods. 相似文献
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Ingrid Witters Philippe Moerman Maximilian Muenke Frans-André Van Assche Koen Devriendt Eric Legius Dominique Van Schoubroeck Jean-Pierre Fryns 《黑龙江环境通报》2001,21(10):839-841
We report the prenatal echographic diagnosis of holoprosencephaly (HPE) at 11 weeks' gestation. Fetopathological examination revealed an unusual variant of semilobar HPE with middle interhemispheric fusion associated with sex-reversal: 46,XY normal male karyotype, normal external and internal female genitalia and streak gonads. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
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T. Van den Bosch D. Van Schoubroeck J. P. Fryns G. Naulaers A. M. Inion K. Devriendt 《黑龙江环境通报》2002,22(5):415-417
This report describes the prenatal findings in monozygotic twins with Costello syndrome. At 16 weeks one twin had 9 mm of nuchal oedema: coarctation of the aorta was diagnosed after birth. At 225/7 weeks relative macrocephaly, mild pyelectasia and moderate polyhydramnios were noted in both twins. In the following 4 weeks the polyhydramnios increased significantly without visualisation of filling of the stomach. Between 275/7 and 302/7 weeks a total of 9 l amniotic fluid was drained and at 304/7 weeks prelabor premature rupture of membranes (PPROM) occurred followed by premature labor and delivery. The neonatal period was complicated by growth retardation, deglutition problems, hypotonia, cardiac and respiratory problems. Both twins died on Day 57 because of respiratory insufficiency. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
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Tarek Abichou Koenraad Mahieu Lei Yuan Jeffery Chanton Gary Hater 《Waste management (New York, N.Y.)》2009,29(5):1595-1601
Previous publications described the performance of biocovers constructed with a compost layer placed on select areas of a landfill surface characterized by high emissions from March 2004 to April 2005. The biocovers reduced CH4 emissions 10-fold by hydration of underlying clay soils, thus reducing the overall amount of CH4 entering them from below, and by oxidation of a greater portion of that CH4. This paper examines in detail the field observations made on a control cell and a biocover cell from January 1, 2005 to December 31, 2005. Field observations were coupled to a numerical model to contrast the transport and attenuation of CH4 emissions from these two cells. The model partitioned the biocover’s attenuation of CH4 emission into blockage of landfill gas flow from the underlying waste and from biological oxidation of CH4. Model inputs were daily water content and temperature collected at different depths using thermocouples and calibrated TDR probes. Simulations of CH4 transport through the two soil columns depicted lower CH4 emissions from the biocover relative to the control. Simulated CH4 emissions averaged 0.0 g m?2 d?1 in the biocover and 10.25 g m?2 d?1 in the control, while measured values averaged 0.04 g m?2 d?1 in the biocover and 14 g m?2 d?1 in the control. The simulated influx of CH4 into the biocover (2.7 g m?2 d?1) was lower than the simulated value passing into the control cell (29.4 g m?2 d?1), confirming that lower emissions from the biocover were caused by blockage of the gas stream. The simulated average rate of biological oxidation predicted by the model was 19.2 g m?2 d?1 for the control cell as compared to 2.7 g m?2 d?1 biocover. Even though its Vmax was significantly greater, the biocover oxidized less CH4 than the control cell because less CH4 was supplied to it. 相似文献