Caracterisation De Mollusques Dulcaquicoles En Tant Que Bioindicateurs De Radiocontamination Dans Un Contexte De Multipollution Metallique Cd Zn

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Caractérisation de mollusques dulçaquicoles en tant que bioindicateurs de radiocontamination dans un contexte de multipollution métallique (Cd, Zn)

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Author : Benoit Fraysse
Publisher :
ISBN 13 :
Total Pages : 151 pages
Book Rating : 4.:/5 (492 download)

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Book Synopsis Caractérisation de mollusques dulçaquicoles en tant que bioindicateurs de radiocontamination dans un contexte de multipollution métallique (Cd, Zn) by : Benoit Fraysse

Download or read book Caractérisation de mollusques dulçaquicoles en tant que bioindicateurs de radiocontamination dans un contexte de multipollution métallique (Cd, Zn) written by Benoit Fraysse and published by . This book was released on 2001 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: La problématique dans laquelle s'insère ce travail de recherche est l'étude des bioindicateurs de radiocontamination des milieux aquatiques continentaux, dans un contexte de multipolution métallique. Les métaux, tels que le cadmium (CD) et le zinc (zn), sont présents dans un nombre croissant d'hydrosystèmes, à des concentrations susceptibles d'induire des effets physiologiques. Cette exposition chronique aux métaux génére des perturbations métaboliques et comportementales des individus, et peut induire l'activation de mécanismes de détoxication. Le principal objectif de recherche à été d'estimer les conséquences de la présence de ces métaux sur la bioaccumulation de radionucléides (57Co, 110m Ag, 134 Cs) par deux espèces de bivalves (Corbicula fluminea et dreissena polymorpha), en terme de niveau de contamination, de cinétique de transfert et de distribution tissulaire des radionucléides. Du fait du caractère exploratoire de cette étude, deux thèmes ont été développés : (i) la vérification in situ de la pertinence de la problématique, et (ii) l'analyse des mécanismes d'interaction métal/ radionucléide en conditions controlées et standardisées (laboratoire). Pour les différentes conditions expérimentales étudiées (laboratoire et terrain), nous avons montré que la pré ence de métaux dans le milieu perturbe la bioaccumulation des radionucléides par des bivalves d'eau douce, notamment par une réduction du niveau de contamination des organismes par les radionucléides, une réduction de leur vitesse d'accumulation et une augmentation de leurs vitesses d'élimination, et modifi cation de leur distribution tissulaire et cellulaire.

Caractérisation de mollusques gastéropodes terrestres en tant que bioindicateurs de la contamination polymétallique (Al, Cr, Mn, Fe, Ni, Zn, Cu, Cd et Pb)

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Author : François Pihan
Publisher :
ISBN 13 :
Total Pages : 415 pages
Book Rating : 4.:/5 (491 download)

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Book Synopsis Caractérisation de mollusques gastéropodes terrestres en tant que bioindicateurs de la contamination polymétallique (Al, Cr, Mn, Fe, Ni, Zn, Cu, Cd et Pb) by : François Pihan

Download or read book Caractérisation de mollusques gastéropodes terrestres en tant que bioindicateurs de la contamination polymétallique (Al, Cr, Mn, Fe, Ni, Zn, Cu, Cd et Pb) written by François Pihan and published by . This book was released on 2001 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'évaluation du niveau ce contamination polymétallique en écosystème terrestre nécessite le choix d'organismes bioindicateurs pertinents. Cette étude valide la capacité bioindicatrice des gastéropodes terrestres. Helix aspersa aspersa et Cepaea nemoralis présentent des capacités de niveau équivalent. Une grille d'évaluation de la contamination polymétallique avec 4 classes pour 8 métaux a été proposée. L'usage de Helix pomatia nécessitera des recherches ultérieures avec établissement d'une grille spécifique. Le choix de Helix aspersa aspersa en biosurveillance active est justifiée par la possibilité d'obtenir un élevage contrôlé des individus exempts de contamination métallique après amélioration de l'aliment. L'étude des niveaux de bioaccumulation atteints pour 8 métaux, dans des conditions variées (animaux d'élevage, animaux autochtones ou transférés), sur sites non contaminés ou contaminés (proximité autoroutière, trafic urbain, ancienne mine de cuivre, CET remédié, aciérie électrique), a permis de valider la grille d'évaluation du niveau de contamination en conservant 4 classes pour Cu, Mn, Cd, Ni et 5 classes pour Fe, Zn, Cr et Pb. Pour le plomb, la distinction entre le plomb d'origine pédologique et le plomb provenant des activités anthropiques peut être réalisée par l'étude des rapports isotopiques entre [exposant]206Pb, [exposant]Pb207 et [exposant]208Pb qui permet de distinguer le pôle « essence-trafic », pôle « industrie » et le pôle « nature ». Une étude ultrastructurale et microanalytique du néphrocyte a mis en évidence l'existence d'un ergastoplasme ondulé original et celle de la production de concrétions majoritairement constituées de silice amorphe. La biominéralisation à base de calcium (pyrophospathes) a été vérifiée ainsi que son rôle de piégeage. Cette biominéralisation représente une voie importante de décontamination pour l'organisme, mais aussi pour l'écosystème

Radiological Conditions at Bikini Atoll

Author : International Atomic Energy Agency
Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Radiological Conditions at Bikini Atoll by : International Atomic Energy Agency

Download or read book Radiological Conditions at Bikini Atoll written by International Atomic Energy Agency and published by . This book was released on 1998 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general concern about the state of the environment has focused the attention of many countries in recent years on the need to remediate areas affected by radioactive residues. The present assessment was requested by the Government of the Republic of the Marshall Islands, with the purpose of obtaining an independent view of the radiological situation on Bikini Atoll, the site of nuclear weapons testing in the period 1946 -1958. In particular, questions were posed about whether the former inhabitants should be permitted to return to their homes and about the nature and extent of any remedial actions which might be necessary. This report presents the results and conclusions of a meeting of international experts convened by the IAEA and chaired by K. Lokan, Australia, in December 1995 to review the available information on the subject.

Safety of Radioactive Waste Disposal

Author : International Atomic Energy Agency
Publisher :
ISBN 13 :
Total Pages : 582 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Safety of Radioactive Waste Disposal by : International Atomic Energy Agency

Download or read book Safety of Radioactive Waste Disposal written by International Atomic Energy Agency and published by . This book was released on 2006 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying CD-ROM contains the complete text of the printed volume.

Biological Dosimetry

Author : W. G. Eisert
Publisher : Springer Science & Business Media
ISBN 13 : 3642693342
Total Pages : 343 pages
Book Rating : 4.6/5 (426 download)

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Book Synopsis Biological Dosimetry by : W. G. Eisert

Download or read book Biological Dosimetry written by W. G. Eisert and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: In October 1982, a small international symposium was held at the Gesellschaft fUr Strahlen- und Umweltforschung mbH (GSF) in Munich as a satellite meeting of the IX International Conference on Analytical Cytology. The symposium focussed on cytometric approaches to biological dosimetry, and was, to the best of our knowledge, the first meeting on this subject ever held. There was strong encouragement from the 75 attendees and from others to publish a proceedings of the symposium. Hence this book, containing 30 of the 36 presentations, has been assembled. Dosimetry, the accurate and systematic determination of doses, usually refers to grams of substance administered or rads of ionization or some such measure of exposure of a patient, a victim or an experimental system. The term also can be used to describe the quantity of an ultimate, active agent as delivered to the appropriate target material within a biological system. Thus, for mutagens, one can speak of DNA dosimetry, meaning the number of adducts produced in the DNA of target cells such as bone-mar row stem cells or spermatogonia.

The Principles of Radioactive Waste Management

Author : International Atomic Energy Agency
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Principles of Radioactive Waste Management by : International Atomic Energy Agency

Download or read book The Principles of Radioactive Waste Management written by International Atomic Energy Agency and published by . This book was released on 1995 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encompasses all aspects of radioactive waste management from waste minimization to disposal and sets out objectives and principles for the protection of human health and the environment, present and future. (Please note: this publication is superseded by SF-1)

Radiation Protection Programmes for the Transport of Radioactive Material

Author : International Atomic Energy Agency
Publisher :
ISBN 13 : 9789201036230
Total Pages : 0 pages
Book Rating : 4.0/5 (362 download)

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Book Synopsis Radiation Protection Programmes for the Transport of Radioactive Material by : International Atomic Energy Agency

Download or read book Radiation Protection Programmes for the Transport of Radioactive Material written by International Atomic Energy Agency and published by . This book was released on 2024-02-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Safety Guide provides recommendations on meeting the requirements established in IAEA Safety Standards Series No. SSR-6 (Rev. 1), Regulations for the Safe Transport of Radioactive Material, 2018 Edition, for a radiation protection programme for the transport of radioactive material. The objectives of a radiation protection programme for the transport of radioactive material are to provide for adequate consideration of radiation protection measures in transport; to ensure that the system of radiological protection is adequately applied; to enhance a safety culture in the transport of radioactive material; and to provide practical measures to meet these objectives. The recommendations provided in this Safety Guide are applicable to the transport of radioactive material by all modes on land, water, or in the air, including transport that is incidental to the use of the radioactive material. The intended audience for this Safety Guide includes competent authorities, consignors, carriers, consignees, and operators of ports (e.g. harbours, seaports and airports). It will also be of interest to the employees of public authorities (customs authorities, harbour authorities, port authorities) concerning activities associated with the transport of radioactive material that involve radiation exposure.

Radiation for a Clean Environment

Author :
Publisher :
ISBN 13 :
Total Pages : 692 pages
Book Rating : 4.0/5 ( download)

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Download or read book Radiation for a Clean Environment written by and published by . This book was released on 1975 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The International Chernobyl Project

Author : International Atomic Energy Agency
Publisher : International Atomic Energy Agency
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The International Chernobyl Project by : International Atomic Energy Agency

Download or read book The International Chernobyl Project written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 1991 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Chernobyl Project was launched in 1990 at the request of the Government of the USSR to assess the environmental and health situation in the areas of the Soviet Union contaminated by the Chernobyl accident and to evaluate the measures taken by the authorities to safeguard the health of the population still living in these areas. Some 200 scientists from 25 countries and 7 international and regional organizations participated in this Project. An International Advisory Committee was set up to oversee the Project and approve its conclusions and recommendations. Almost 50 missions to the USSR were carried out in order to obtain the best available information and to make an independent assessment of the situation. The results of the International Chernobyl Project are presented in two main documents: The full Technical Report, which contains, in addition to the conclusions and recommendations of the Project, all the relevant methodologies and the data upon which they are based, and the Overview, which gives a summary of the methodologies presented in the Technical Report together with the conclusions and recommendations. While the Technical Report is intended for the scientific community, the Overview is intended for decision makers, concerned groups and the informed public. Three maps showing the distribution of surface ground contamination by plutonium, strontium and caesium released by the Chernobyl accident and deposited in the Byelorussian SSR, the Russian SFSR and the Ukraine are attached to the Overview. A third document, containing the proceedings of an International Conference which took place in Vienna in May 1991, presents the Project results to the scientific community and to the media. The Proceedings should be read in conjunction with either the Overview or the Technical Report.

Disposal of Low-level Radioactive Waste

Author : United States. Congress. Senate. Committee on Environment and Public Works
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.:/5 (51 download)

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Book Synopsis Disposal of Low-level Radioactive Waste by : United States. Congress. Senate. Committee on Environment and Public Works

Download or read book Disposal of Low-level Radioactive Waste written by United States. Congress. Senate. Committee on Environment and Public Works and published by . This book was released on 2001 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: