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The concentrations of (238)Pu and (239+240)Pu in water samples and suspended particulate fractions, as well as in colloidal fraction from the southern Baltic Sea are presented. The (239+240)Pu concentration in surface seawater samples fall within range from 5.2 mBq.m(-3) for Gdańsk Bay to 150 mBq.m(-3) for Pomeranian Bay, most of which (from 52 to 96%) constituted filterable forms (=0.45 microm). Also the distribution of plutonium in parts of cod gills and skin are presented and discussed. Over 60% of the plutonium in cod gills is accumulated in the gill arch, which suggests its metabolic origin. Most of plutonium associated with skin is in mucus, which suggests its adsorption from water. 相似文献
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Strumińska-Parulska Dagmara I. Szymańska Karolina Krasińska Grażyna Skwarzec Bogdan Falandysz Jerzy 《Environmental science and pollution research international》2016,23(22):22606-22613
Environmental Science and Pollution Research - The paper presents the studies on 210Po and 210Pb activity determination in red-capped scaber (Leccinum aurantiacum (Bulliard) Gray) collected in... 相似文献
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Dagmara Nawrocka Torbjörn Brorson Thomas Lindhqvist 《Journal of Cleaner Production》2009,17(16):1435-1443
This paper focuses on the role of ISO 14001 in environmental supply management practices in Swedish companies. It discusses the existing and potential role of ISO 14001 for three key operational tasks of environmental supply chain management: to communicate the requirements to the supplier, to motivate and enable the supplier, and to verify that the supplier follows the requirements. The study used three different research methods: interviews with environmental managers, focus group discussions and a survey of two multinational companies and their operating units in several countries.It concludes that cooperation between the purchasing and environmental functions within a company is frequently not sufficiently achieved in implementation of ISO 14001; this makes the communication of customer requirements to suppliers less efficient. Building close relationships with suppliers is important to overcome initial difficulties, but this often conflicts with having a large supplier base. For the supplier to have an ISO 14001 certificate is seldom an absolute requirement, however, preference is often given to such suppliers. The value of the ISO 14001 certificate, as a proof of environmental performance, is a combination of the supplier's environmental ambitions, the advancement of supply chain practices of the customer and the ambitions of the certification bodies. Supplier audits are not commonly used as they are resource-consuming. Monitoring and verification approaches need further development. 相似文献
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Skwarzec B Jahnz-Bielawska A Strumińska-Parulska DI 《Journal of environmental radioactivity》2011,102(8):728-734
The aim of the work was to estimate plutonium inflow from the Vistula River’s catchments area to the Baltic Sea. There were differences in plutonium activities depending on season and sampling site. The highest activities of 238Pu and 239+240Pu were transported from the Vistula River watershed to the Baltic Sea in spring and the lowest in summer. Annually, the southern Baltic Sea is enriched via the Vistula River with 10.3 MBq of 238Pu and 89.0 MBq of 239+240Pu. The enhanced concentration of plutonium in water from the Vistula River is the result of its runoff from the Vistula drainage area, mostly from snowmelt, enhanced rainfalls and leached materials from river bed. 相似文献
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Agnieszka Jdruch Lucyna Falkowska Dominika Saniewska Maciej Durkalec Agnieszka Nawrocka Elbieta Kalisiska Artur Kowalski Jzef M. Pacyna 《Ambio》2021,50(9):1698
The goal of this paper is to assess the current status and trends of total mercury (THg) contamination of the atmosphere and terrestrial ecosystems in Poland. The study shows that the reduced domestic and worldwide atmospheric emission of Hg resulted in decreased THg level in the terrestrial biotope and biosphere. Considering that Poland is one of the main Hg emitters in Europe, the THg concentrations in its abiotic environment are still elevated. However, the THg level in terrestrial organisms is relatively low, which is because a large proportion of Hg deposited on land is accumulated in organic-rich soils. Regarding the THg concentration, consumption of wildlife and livestock from Poland is safe for humans. Nevertheless, the authors indicate the need for effective environmental monitoring, based on selected bioindicators, which is crucial considering the slowing reduction of Hg emission combined with the consequences of the changing climate.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-021-01505-1. 相似文献
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Adriana Kolesarova Shubhadeep Roychoudhury Bibiana Klinerova Dagmara Packova Katarina Michalcova Marek Halenar 《Journal of environmental science and health. Part. B》2019,54(6):533-537
Quercetin is a dietary bioflavonoid used widely as a food supplement and is generally recognized as safe. The aim of this in vitro study was to examine the steroid hormone (progesterone and 17- β estradiol) release, proliferation (PCNA and cyclin B1) and apoptosis (caspase 3 and p53) of porcine ovarian granulosa cells after the addition of quercetin at concentrations 0.01, 0.1, 1, 10 and 100?μmol?L?1. Progesterone release was stimulated at the concentration 10?μmol?L?1. Quercetin neither had any impact on 17-β estradiol secretion nor on the presence of PCNA. However, a significant enhancement of the occurrence of cyclin B1 was noted except for the lowest concentration 0.01?μmol?L?1. Quercetin did not have any influence on the number of granulosa cells containing caspase 3, but at the concentration 10?μmol?L?1 it inhibited p53 occurrence. Results confirm the safety of quercetin in porcine ovarian granulosa cell model and further suggest its possible concentration-dependent influence on ovarian functions through pathway that may involve progesterone, cyclin B1 and p53. 相似文献
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Strumińska-Parulska DI Skwarzec B Fabisiak J 《Journal of environmental radioactivity》2011,102(12):1105-1111
The aim of the paper was plutonium (238Pu and 239+240Pu) determination in seabirds, permanently or temporarily living in northern Poland at the Baltic Sea coast. Together 11 marine birds species were examined: 3 species permanently residing in the southern Baltic, 4 species of wintering birds and 3 species of migrating birds. The obtained results indicated plutonium is non-uniformly distributed in organs and tissues of analyzed seabirds. The highest plutonium content was found in the digestion organs and feathers, the smallest in skin and muscles. The plutonium concentration was lower in analyzed species which feed on fish and much higher in herbivorous species. The main source of plutonium in analyzed marine birds was global atmospheric fallout. 相似文献
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With more than 130,000 organizations worldwide certified according to ISO requirements, business people, regulatory authorities and other stakeholders have reason to wonder whether the purpose of ISO 14001, which is to help improve environmental performance, is being fulfilled. There is a growing body of literature attempting to answer this question. The results, however, are inconclusive.This meta-study analyzes a pool of 23 studies connecting environmental performance to environmental management systems. It shows that the reason that earlier studies arrived at mixed conclusions is twofold. Firstly, there is no agreement on what environmental performance is or how to measure it. Secondly, there is neither clarity nor agreement about how or why environmental management systems are expected to aid performance. It is therefore unclear whether the mechanisms that lead to improvement are expected to be the same for all companies or dependent on each implementation.The authors conclude that it is more fruitful to research how environmental management systems affect performance, rather than whether they do so or not. The recommended starting point for such studies is environmental performance as each organization defines it. This in turn implies a case by case approach and a need for much more research in the field. 相似文献