Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Accumulation Of Technetium From Soil By Plants
Download Accumulation Of Technetium From Soil By Plants full books in PDF, epub, and Kindle. Read online Accumulation Of Technetium From Soil By Plants ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Accumulation of Technetium from Soil by Plants by :
Download or read book Accumulation of Technetium from Soil by Plants written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The isotope $sup 99$Tc (T $sup 1$/$sub 2$, 2.15 x 10$sup 5$ years) is produced by the spontaneous fission of $sup 238$U in nature and by the slow neutron fission of $sup 238$U in nuclear reactors. In the latter case, the potential exists for Tc entrance into the environment in emissions from nuclear reactors, nuclear fuel reprocessing plants, and other facilities which use Tc for commercial purposes. Results are reported from studies on Tc uptake by plants. The most stable chemical species of Tc in aqueous solution is the pertechnetate ion (TcO$sub 4$$sup -1$), and it is this form which is most likely to enter surface soils. Recent studies indicated that at least over the short term, pertechnetate is soluble and highly mobile in most soils and is sorbed in significant quantities only in high organic matter, low pH soils. Plant availability normally increases with increased ion solubility in soil provided the ion is not discriminated against at the plant root level. Furthermore, the aqueous chemistry of pertechnetate is similar in several respects to permanganate and molybdate, compounds of elements essential in plant nutrition. Experiments were undertaken to determine the uptake and distribution of Tc in plants as a function of time using soybeans (Glycine max) and $sup 99$Tc as a tracer. (CH).
Book Synopsis Accumulation of Technetium from Soil by Plants - by : Raymond E. Wildung
Download or read book Accumulation of Technetium from Soil by Plants - written by Raymond E. Wildung and published by . This book was released on 1975 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Accumulation of Radioactivity in Plants Grown on "fission Fall Out" Contaminated Soil by : William G. Long
Download or read book Growth and Accumulation of Radioactivity in Plants Grown on "fission Fall Out" Contaminated Soil written by William G. Long and published by . This book was released on 1955 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technetium in Tomato Plants by : Geert Cornelis Krijger
Download or read book Technetium in Tomato Plants written by Geert Cornelis Krijger and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Effecting Technetium-99 Behavior in Soils and Plants by : Lisa Hart Thorvig
Download or read book Factors Effecting Technetium-99 Behavior in Soils and Plants written by Lisa Hart Thorvig and published by . This book was released on 1978 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of Technetium-99 in Soils and Plants. Final Report, April 1, 1974--December 31, 1978 by :
Download or read book Behavior of Technetium-99 in Soils and Plants. Final Report, April 1, 1974--December 31, 1978 written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies described in this report were aimed at establishing the magnitude and mechanisms of /sup 99/Tc sorption by soils and uptake by plants. Results show that /sup 99/Tc was sorbed from solution over a period to two to five weeks by 8 of 11 soils studies. The slow rate of sorption, the lack of sorption by low organic matter soils, the elimination of sorption following sterilization and increased sorption following addition of dextrose all point to a microbial role in the sorption process. However, it has not been established whether this is a direct or indirect role nor is it possible to clearly predict the conditions under which sorption will occur. Results of plant uptake studies show that /sup 99/Tc can be taken up and translocated into the photosynthetic tissue of higher plants with concentrations in seeds being much less than in vegetative tissue. Technetium-99 was also shown to be toxic to plants at low concentrations and evidence suggests that this is a chemically rather than radiologically induced toxicity. However, this remains to be completely resolved as well as whether there is a threshold level of /sup 99/Tc required before toxicity occurs. Studies of short-term, dynamic, aerobic systems indicated that /sup 99/Tc moves through the soil as a relatively large anion exhibiting characteristic miscible displacement with some asymmetric tailing. /sup 99/Tc exhibits greater retention that C1/sup -/, which may be attributed statistically to weak complexion by organic matter. It is unlikely that this retention phenomenon is related to the static sorption activity reported in the first part of this study.
Book Synopsis Technetium in the Environment by : G. Desmet
Download or read book Technetium in the Environment written by G. Desmet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of technetium (in 1937, by Perrier and Segre), technetium-99 and technetium-99m have become most familiar in the specialised literature, the behaviour of the former being of concern regarding its health impact, the latter having been used intensively in medical tests for many years. The knowledge of the characteristics and behaviour of this element in nature is currently increasing exponentially. It has become clear, however, that there is still a serious shortage of information needed to assess properly its burden and impact on man and his environment. Technetium may indeed be released from nuclear installations or as a waste product from medical applications. It is generally considered to be highly mobile as the anion TcOi, but it is also suspected to be readily reduced in soils and metabolised in living beings into lower oxidation states. The seminar was planned to analyse thoroughly the experimental results obtained up to now and to make recommendations of specific issues requiring further research. This book presents the papers of the different sessions in the order of presentation, and the conclusions drawn by three discussion groups which dealt separately with: problems of sources and distribution of man-made technetium and its radiological consequences; the chemical behaviour of technetium in different ecosystems; biochemical reactions and binding with macromolecules in various life systems. vi Preface The editors, together with the Programme Committee of the Seminar, wish to express their gratitude to the chairmen of the different sessions for their summary of the group discussions.
Book Synopsis Technetium in the Environment by : G. Desmet
Download or read book Technetium in the Environment written by G. Desmet and published by Springer Science & Business Media. This book was released on 1986-05-31 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of technetium (in 1937, by Perrier and Segre), technetium-99 and technetium-99m have become most familiar in the specialised literature, the behaviour of the former being of concern regarding its health impact, the latter having been used intensively in medical tests for many years. The knowledge of the characteristics and behaviour of this element in nature is currently increasing exponentially. It has become clear, however, that there is still a serious shortage of information needed to assess properly its burden and impact on man and his environment. Technetium may indeed be released from nuclear installations or as a waste product from medical applications. It is generally considered to be highly mobile as the anion TcOi, but it is also suspected to be readily reduced in soils and metabolised in living beings into lower oxidation states. The seminar was planned to analyse thoroughly the experimental results obtained up to now and to make recommendations of specific issues requiring further research. This book presents the papers of the different sessions in the order of presentation, and the conclusions drawn by three discussion groups which dealt separately with: problems of sources and distribution of man-made technetium and its radiological consequences; the chemical behaviour of technetium in different ecosystems; biochemical reactions and binding with macromolecules in various life systems. vi Preface The editors, together with the Programme Committee of the Seminar, wish to express their gratitude to the chairmen of the different sessions for their summary of the group discussions.
Book Synopsis Environmental Behavior of Technetium in Soil and Vegetation by : Frank Owen Hoffman
Download or read book Environmental Behavior of Technetium in Soil and Vegetation written by Frank Owen Hoffman and published by . This book was released on 1982 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Trace Elements in Soils and Plants by : Alina Kabata-Pendias
Download or read book Trace Elements in Soils and Plants written by Alina Kabata-Pendias and published by CRC Press. This book was released on 2000-11-08 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contemporary legislation respecting environmental protection and public health, at both national and international levels, are based on data that characterize chemical properties of environmental phenomena, especially those that reside in our food chain. Thus, environmental and food quality are now matters of major public concern and therefore a sy
Book Synopsis Metal Ions in Biology and Medicine by : Lylia Khassanova
Download or read book Metal Ions in Biology and Medicine written by Lylia Khassanova and published by John Libbey Eurotext. This book was released on 1990-05 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Seventh International Symposium on Metal Ions in Biology & Medicine held in Saint Petersburg State University, Saint Petersburg, Russia, on 5-9 May 2002.
Book Synopsis Radionuclide Contamination and Remediation Through Plants by : Dharmendra Kumar Gupta
Download or read book Radionuclide Contamination and Remediation Through Plants written by Dharmendra Kumar Gupta and published by Springer. This book was released on 2014-07-14 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the mechanistic (microscopic) understanding of radionuclide uptake by plants in contaminated soils and potential use of phytoremediation. The key features concern radionuclide toxicity in plants, how the radioactive materials are absorbed by plants, and how the plants cope with the toxic responses. The respective chapters examine soil classification, natural plant selection, speciation of actinides, kinetic modeling, and case studies on cesium uptake after radiation accidents. Radionuclide contaminants pose serious problems for biological systems, due to their chemical toxicity and radiological effects. The processes by which radionuclides can be incorporated into vegetation can either originate from activity interception by external plant surfaces (either directly from the atmosphere or from resuspended material), or through uptake of radionuclides via the root system. Subsequent transfer of toxic elements to the human food chain is a concrete danger. Therefore, the molecular mechanisms and genetic basis of transport into and within plants needs to be understood for two reasons: The effectiveness of radionuclide uptake into crop plants – so-called transfer coefficient – is a prerequisite for the calculation of dose due to the food path. On the other hand, efficient radionuclide transfer into plants can be made use of for decontamination of land – so-called phytoremediation, the direct use of living, green plants for in situ removal of pollutants from the environment or to reduce their concentrations to harmless levels.
Book Synopsis Models for Dose Assessments by : Ulla Bergström
Download or read book Models for Dose Assessments written by Ulla Bergström and published by . This book was released on 1999 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Health Perspectives by :
Download or read book Environmental Health Perspectives written by and published by . This book was released on 1993 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Toxicological Benchmarks for Screening Potential Contaminants of Concern for Effects on Terrestrial Plants by : R. A. Efroymson
Download or read book Toxicological Benchmarks for Screening Potential Contaminants of Concern for Effects on Terrestrial Plants written by R. A. Efroymson and published by . This book was released on 1997 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radioactive Waste Processing and Disposal by : United States. Energy Research and Development Administration
Download or read book Radioactive Waste Processing and Disposal written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
