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4 edition of Isotopes in biological dinitrogen fixation found in the catalog.

Isotopes in biological dinitrogen fixation

by Advisory Group Meeting on the Potential Use of Isotopes in the Study of Biological Dinitrogen Fixation Vienna 1977.

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  • 17 Currently reading

Published by International Atomic Energy Agency in Vienna .
Written in English

    Subjects:
  • Nitrogen -- Fixation.

  • Edition Notes

    Other titlesPotential use of isotopes in the study of biological dinitrogen fixation.
    Statementproceedings of an Advisory Group Meeting organized by the Joint FAO/IAEA Division of Atomic Energy in Food and Agriculture and held in Vienna, 21-25 November 1977.
    SeriesPanel proceedings series, Panel proceedings series (International Atomic Energy Agency)
    ContributionsInternational Atomic Energy Agency., Joint FAO/IAEA Division of Atomic Energy in Food and Agriculture.
    Classifications
    LC ClassificationsQP535N1 A38
    The Physical Object
    Pagination316 p. :
    Number of Pages316
    ID Numbers
    Open LibraryOL22310082M
    ISBN 109200110789

    Nitrogen has two isotopes, N and N, both of which are used in various applications. N is used for the production of the radioisotope O which is used in PET. N is also used to study the uptake of Nitrogen in plants and the metabolism of proteins in the human body. N is used for the production of the PET radioisotope C Purchase Nitrogen Isotope Techniques - 1st Edition. Print Book & E-Book. ISBN ,

    Periodic Table--Nitrogen. There are two stable isotopes of N: 14 N and 15 N. Because the average abundance of 15 N in air is a very constant % (Junk and Svec, ), air (AIR) is used as the standard for reporting d 15 N values. Most terrestrial materials have d 15 N compositions between ‰ and +30‰. The dominant source of nitrogen in most forested ecosystems is the atmosphere (d Electrochemical Dinitrogen Fixation Investigators Matthew W. Kanan, Assistant Professor, Department of Chemistry, Stanford University Thomas Veltman, Graduate Researcher, Department of Chemistry, Stanford University Abstract Materials that catalyze efficient electrochemical N 2 fixation would open up the possibility of using an N 2/NH.

    Use of Stable Isotopes of Carbon and Nitrogen to Identify Sources of Organic Matter to Bed Sediments of the Tualatin River, Oregon Scientific Investigations Report – Prepared in cooperation with Clean Water Services U.S. Department of the Interior U.S. Geological Size: 2MB. Use of nitrogen isotopes to determine sources65 of nitrate contamination in biological evaporation ponds in the Irwin basin (Fig. 1) during Since , wastewater has been treated and discharged to ponds at the wastewater treatment facility where some of it infiltrates and recharges the underlying aquifer. Some of theFile Size: KB.


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Isotopes in biological dinitrogen fixation by Advisory Group Meeting on the Potential Use of Isotopes in the Study of Biological Dinitrogen Fixation Vienna 1977. Download PDF EPUB FB2

Get this from a library. Isotopes in biological dinitrogen fixation: proceedings of an Advisory Group Meeting. [Joint FAO/IAEA Division of Atomic Energy in Food and Agriculture.;]. Enhanced PDF; Standard PDF ( KB) ; Biological N 2 fixation, the assimilation of atmospheric N 2 into NH 3, is the province of highly specialized microorganisms, and a key entry point for atmospheric nitrogen (N) into terrestrial ecosystems (Vitousek et al., ).It is probably the most important biologically mediated process after photosynthesis, and is universally carried out by the.

A plant mixture of white clover (Trifolium repens L.), red clover (Trifolium pratense L.), and ryegrass (Lolium perenne L.) was established in the spring of under a cover-crop of barley. Treatments were two levels of nitrogen ( and 20 kg N ha-1) and two cutting intensities (3 and 6 cuts per season).

Fixation of atmospheric derived nitrogen was estimated by two 15N dilution methods, one Cited by:   where R sample and R standard represent the isotope ratio δ 15 N () in the sample and in the standard respectively, calculated using equation (1).By convention, R is the ratio of the less abundant isotope over the most abundant isotope (i.e.

15 N/ 14 N for nitrogen). As previously discussed, the δ 15 N value changes under the influence of chemical and physical by: 7. Peoples M.B., Herridge D.F., Ladha J.K. () Biological nitrogen fixation: An efficient source of nitrogen for sustainable agricultural production?.

In: Ladha J.K., Peoples M.B. (eds) Management of Biological Nitrogen Fixation for the Development of More Productive and Sustainable Agricultural Systems. Developments in Plant and Soil by:   Though there is some evidence that biological N 2 fixation may have developed as early as Ga (Stüeken et al., ) and biological nitrogen utilization may have been active by Ga.

Nitrogen compounds have a very long history, ammonium chloride having been known to were well known by the Middle Ages. Alchemists knew nitric acid as aqua fortis (strong water), as well as other nitrogen compounds such as ammonium salts and nitrate salts.

The mixture of nitric and hydrochloric acids was known as aqua regia (royal water), celebrated for its ability to dissolve Group: group 15 (pnictogens). A Treatise on dinitrogen fixation Hardcover – by Hardy (Author) See all formats and editions Hide other formats and editions.

Price New from Used from Hardcover, "Please retry" — — $ Hardcover from $ Author: Hardy. nitrogen (N) [ni´tro-jen] a chemical element, atomic number 7, atomic weight (See Appendix 6.) It is a gas constituting about four-fifths of common air; chemically it is almost inert.

It is not poisonous but is fatal if breathed alone because of oxygen deprivation. It is soluble in the blood and body fluids, and can cause serious symptoms when. @article{osti_, title = {Dinitrogen fixation of rice-Klebsiella associations}, author = {Yoo, I.D.

and Fujii, T. and Sano, Y. and Komagata, K. and Yoneyama, T. and Iyama, S. and Hirota, Y.}, abstractNote = {N/sub 2/ fixation by Klebsiella oxytoca strain NG13, isolated from the rhizosphere of a rice (Oryza sativa L.) plant, in association with Indica type rice strain, C is reported.

Nitrogen isotope ratios from rocks between and  billion years old are most readily explained by biological nitrogen fixation, most probably using the metal molybdenum as a cofactor. @article{osti_, title = {Appraisal of the nitrogen natural-abundance method for quantifying dinitrogen fixation}, author = {Bremer, E and van Kessel, C}, abstractNote = {Several investigators have questioned the use of the {sup 15}N natural-abundance method of estimating N{sub 2} fixation because of variability in soil {delta}{sup 15}N and small differences between the {delta}{sup Fixation of [13 N]N 2 and transfer of fixed nitrogen in the Anthoceros-Nostoc symbiotic association.

PlantaMeeks, J.C., N. Steinberg, C.M. Joseph, C.S. Enderlin, P.A. Jorgensen, and G.A. Peters. Assimilation of exogenous and dinitrogen-derived 13 NH 4 + by Anabaena azollae separated from Azolla caroliniana Willd.

Archives. Natural nitrogen (7 N) consists of two stable isotopes: the vast majority (%) of naturally occurring nitrogen is nitrogen, with the remainder being nitrogenFourteen radioisotopes are also known, with atomic masses ranging from 10 to 25, along with one nuclear isomer, 11m N.

All of these radioisotopes are short-lived, the longest-lived being nitrogen with a half-life of rd atomic weight A(N): [, ], Conventional: nitrogen fixation has been presented to have a concise overview. The fundamental aspect of biological nitrogen fixation and dinitrogen complexes of transition metals with basic background material is presented, using features that enhance the learning process.

Biological Nitrogen Fixation (BNF) is known to be a key to sustain agriculture and to reduce soil fertility decline.

Research on microorganisms and plants able to fix nitrogen contributes largely to the production of biofertilizers. Thus it is important to ensure that.

Isotopic evidence for biological nitrogen fixation by molybdenum-nitrogenase from Gyr. Stüeken EE(1), Buick R(1), Guy BM(2), Koehler MC(1). Author information: (1)Department of Earth &Space Sciences and Astrobiology Program, University of Cited by: Biological dinitrogen fixation provides the largest input of nitrogen to the oceans, therefore exerting important control on the ocean's nitrogen inventory and primary productivitCited by: The classicial difference method (based on Kjeldahl determinations) and the 15N-isotope dilution method of measuring N fixation by Azospirillum brasilense associated with maize in vitro were compared.

Both methods gave an accurate measure of the amount of Azospirillum-fixed N found in the maize plant; % of the maize N was derived from the by: Most legumes conduct biological dinitrogen fixation in symbiosis with rhizobia. Chapter Crop profiles: legumes Importance of bacteroid number in nodules and effective nodule mass to.

In many soils and for many crops, farmers increase the nutrient supply of nitrogen by the addition of various forms of nitrogen to the soil or by biological dinitrogen fixation with legumes. Plants consume only about 50% of the added nitrogen forms, and there is a strong need to increase this utilization level.Biological dinitrogen fixation in mangrove communities of the Tampa Bay region of South Florida was investigated using the acetylene reduction technique.

Low rates of acetylene reduction ( to nmol of C(2)H(4)/g [wet weight] per h) were associated with plant-free sediments, while plant-associated sediments gave rise to slightly higher Cited by: THE DIURNAL PATTERN OF DINITROGEN FIXATION BY CYANOBACTERIA IN SITU BY MARK THS, JOHN R.

GALLON AND ALAN E. CHAPLIN Department of Biochemistry, School of Biological Sciences, University College of Swansea, Swansea SA2 8PP, UK {Accepted 31 July ) SUMMARY The diurnal patterns of cyanobacterial acetylene reduction (nitrogen fixation Cited by: