NDLTD logo NDLTD Union Catalog and Global ETD Search

Global ETD Search

Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

Results

Showing 1 to 20 of 22 for “"Nitrogen-15"”.

  1. Characterization of chemically fixed nitrogen-15-labeled liquid anhydrous ammonia and of biologically immobilized nitrogen-15 in typical Illinois mollisols

    He, Xin-TaoUniversity of Illinois at Urbana-Champaign2011

    … by soil organic matter. For this purpose, $\sp{15}$N-labeled liquid anhydrous NH$\sb3$ was injected into a Drummer soil. The fixed $\sp{15}$NH$\sb3$ was sequentially extracted with 0.15 M Na$\sb4$P$\sb2$O$\sb7$ and 0.15 M KOH, and the extracted N was fractionated into humic acid (HA) and fulvic …

    uiuc Repository record

  2. Recovers of Nitrogen-15-Labeled Fertilizers in Field Studies

    Westerman, Robert LeeUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-10T17:12:48Z (GMT). No. of bitstreams: 1 7013536.pdf: 6713882 bytes, checksum: f563c31b1838e814fb0bf8ce82d17aae (MD5) Previous issue date: 1969

    uiuc Repository record

  3. Characterization of Newly Immobilized Nitrogen-15 in a Typical Illinois Mollisol

    Kelley, Kenneth RayUniversity of Illinois at Urbana-Champaign2014

    Turnover of N through mineralization-immobilization leads to incorporation of fertilizer N into organic forms. In time, part of the immobilized N is converted into biologically resistant humus forms. Attempts to characterize the stabilized N have been unsuccessful, partly because the procedures …

    uiuc Repository record

  4. Recovery of Nitrogen-15-Labeled Liquid Anhydrous Ammonia Applied to Soil

    Norman, Richard JamesUniversity of Illinois at Urbana-Champaign2014

    … ammonia (LAA) is the most extensively used nitrogen (N) fertilizer in U.S. and Illinois agriculture, knowledge concerning its transformations in soil is limited. The understanding of LAA transformations and the products it forms in soil are agronomically important because they ultimately …

    uiuc Repository record

  5. NMR STRUCTURAL INVESTIGATIONS OF AQUATIC HUMIC SUBSTANCES (PYRAZOLINE, 1,3-DIPOLAR ADDITION, NITROGEN-15).

    THORN, KEVIN ARTHUR.The University of Arizona.1984

    The hydroxyl group functionality of a series of aquatic humic and fulvic acids was examined by methylating the samples with ¹³C-enriched reagents and looking at the ¹³C NMR of the resulting methyl esters and ethers. The methylation procedure entailed methylation with ¹³C-diazomethane followed by …

    arizona-thes Repository record

  6. A Contribution to the Study of the Nitrogen-14 - Nitrogen-15 Hyperfine Structure

    Holloway, William Weller, Jr.University of Illinois at Urbana-Champaign2015

    Made available in DSpace on 2015-05-12T17:12:23Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6101623.PDF: 2481474 bytes, checksum: eede2fbd9cd32b6c0eb0c9effc003923 (MD5) Previous issue date: 1961

    uiuc Repository record

  7. Natural Nitrogen-15 Abundance and Changes in Total Nitrogen as Influencedby Soil Management

    Meints, Vernon WayneUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-14T14:37:16Z (GMT). No. of bitstreams: 1 7606871.pdf: 2365282 bytes, checksum: f3e5d7d30e2ef03b109d8cac40db8b98 (MD5) Previous issue date: 1975

    uiuc Repository record

  8. Development of Nitrogen-15- and Carbon-13-Labeled Biochemical Probes for Hyperpolarized Metabolic Imaging

    Suh, Eul Hyun2021

    Pages 44-75 are misnumbered as pages 43-74, pages 76-103 are misnumbered as pages 73-100, pages 104-129 are misnumbered as pages 100-125, and pages 130-134 are misnumbered as pages 125-129.

    utswmed Repository record

  9. Evolution of Dinitrogen and Nitrous Oxide From Soils Treated With Nitrogen-15-Labeled Fertilizer

    Mulvaney, Richard LesleyUniversity of Illinois at Urbana-Champaign2014

    … capable of reducing nitrate (NO(,3)('-)) to dinitrogen (N(,2)) and nitrous oxide (N(,2)O), the significance of denitrification under field conditions is still largely unknown because of difficulties associated with its measurement. These difficulties arise from the fact that one of the products …

    uiuc Repository record

  10. Leaching and Denitrification Losses of Nitrogen-15 Labeled Fertilizer Nitrogen in Two Illinois Soils

    Hill, Walter AndrewUniversity of Illinois at Urbana-Champaign2014

    … 1 7811251.pdf: 9783006 bytes, checksum: 39be15590d27e9098a1452678e5cba93 (MD5) Previous issue date: 1978

    uiuc Repository record

  11. Loss of Nitrogen-15-Labeled Nitrogen From Some Illinois Soils by Denitrification And/or Leaching

    Mc Kenzie, Eli, Jr.University of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-12T00:18:04Z (GMT). No. of bitstreams: 1 7514144.pdf: 6674375 bytes, checksum: 2da09fe5db26060ead0f0e504c5e3a3f (MD5) Previous issue date: 1975

    uiuc Repository record

  12. Chemical Distribution of Fertilizer Nitrogen Remaining in the Soil After Cropping as Revealed by Nitrogen-15 Studies

    Allen, Arthur LeeUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-12T00:17:46Z (GMT). No. of bitstreams: 1 7212061.pdf: 3276408 bytes, checksum: 0f8f14ba4563a3e7bc5de234f4ed552a (MD5) Previous issue date: 1971

    uiuc Repository record

  13. Development of a Software Package for the Quantitative Analysis of Proteomic Mass Spectrometry Datasets Labelled with Nitrogen-15

    Charles, Philip DavidUniversity of Cambridge2020

    Elemental metabolic labelling using 15N stable isotopes is a technique used in peptide-centric proteomics that allows samples to be mixed before preparation and analysis (minimising technical variance) without introducing sample ambiguity to the results. Labelling with 15N induces a mass shift in …

    cambridge Repository record

  14. Omnivory and selective feeding by zooplankton along a lake production gradient: Complementary nitrogen-15 isotope and gut pigment analyses.

    Graham, Mark DouglasFaculty of Graduate Studies and Research, University of Regina1997

    regina Repository record

  15. Separation of the E2 and M1 form factors of the 6.32 MeV state of nitrogen-15 using (electron,electron'gamma)

    Mueller, Paul EdwardUniversity of Illinois at Urbana-Champaign2011

    The 6.32 MeV (${3\over 2}\sp-$) state of $\sp{15}$N was studied by coincident (e,e$\sp\prime\gamma$) electron scattering. The two transverse multipole form factors (E2 and M1) were separated using a combined analysis of (e,e$\sp\prime$) and (e,e$\sp\prime\gamma$) data. This experiment is the first …

    uiuc Repository record

  16. Unifying ecosystem concepts and mercury biomagnification in an estuarine environment using stable isotopes (delta-carbon-13 and delta nitrogen-15).

    Pastershank, Georgine M.University of Ottawa (Canada)2009

    Isotope ratios of carbon (13C/12C) and nitrogen (15N/14N), on a parts per thousand (‰) basis relative to a standard, were used to trace carbon flows (delta 13C) and trophic positions of organisms (delta15N). Values of delta13C and delta15N were obtained for sediments, suspended particulate …

    ottawa-retro Repository record

  17. Determination Of The Sequence Distribution And Ionization Constant Of Poly(Acrylic Acid), Poly(Vinylamine) And Poly(Acrylic Acid - Co-Vinylamine) By Nmr Spectroscopy (Carbon-13 Two-Dimensional, Nitrogen-15 Nmr, Titration).

    Chang, Chen

    uab Repository record

  18. A cloud-chamber study of the disintegration of oxygen and nitrogen

    Lillie, Alan BentleyRice University1951

    A study of the disintegration of nitrogen and oxygen when bombarded by neutrons has been made by means of a cloud chamber. By observing the particles produced in the disintegration of the oxygen and nitrogen nuclei, data have been taken on several phenomena; the energy levels of carbon-13, …

    rice Repository record

  19. Assimilation of N¹⁵-histidine in amino acid imbalance

    Hartman, David RobertVirginia Polytechnic Institute1966

    … coli cultured in a defined medium containing nitrogen-15 enriched ammonium salts as the only source of nitrogen. Commercially prepared L-N¹⁵-histidine.HC1.H₂0 was used to follow the limiting amino acid in the imbalanced diet in rats fed a chemically-defined imbalanced or corrected diet. Total …

    vt Repository record

  20. A Magneto-Gravitational Neutron Trap for the Measurement of the Neutron Lifetime

    Salvat, Daniel Joseph[Bloomington, Ind.] : Indiana University2015

    … numerical techniques. We also investigate solid nitrogen-15 as a source of UCN using neutron time-of-flight spectroscopy. We conclude with a discussion of forthcoming research and development for UCN detection and UCN sources.

    iu Repository record

Page 1 of 2