Doctoral Dissertations

Abstract

"Neutron activation and γ-counting were used to determine the relative abundances of six stable tellurium isotopes in the acid-etched residues of the Allende meteorite. The results were correlated with the isotopic compositions of xenon and the elemental abundances of helium and neon in similarly prepared residues. Nucleosynthesis appears to be the only viable explanation for the anomalous isotopic and elemental compositions observed in these residues. Our results suggest that the solar system condensed from an isotopically and chemically zoned nebula that was produced by the explosion of a supernova, concentric with the present sun.

A combination of neutron activation and mass spectrometry has been used to determine the concentrations of fissiogenic 129I and stable 127I in rain, milk and the thyroids of man, cow and deer from Missouri rain and deer thyroids show the highest average values of the 129I/127I ratio. Milk and the thyroids of cattle and humans show successively lower values of the 129i/127i ratio due to dietary additives of mineral iodine and to biological averaging. The observed levels of fission produced 129I in this iodine-deficient area pose no major health hazard"--Abstract, page iii.

Advisor(s)

Manuel, O. (Oliver), 1936-

Committee Member(s)

Hardtke, Fred C.
Roach, D. Vincent
Tsoulfanidis, Nicholas
Hanna, Samir B.

Department(s)

Chemistry

Degree Name

Ph. D. in Chemistry

Comments

The research described herein was made possible by

  • A research contract with the Energy Research and Development Administration (ERDA), Contract No. EY-76-S-02-2450*.000
  • A National Science Foundation Grant, No. NSF EAR 78 09251-01.
  • Special Equipment Funds from the University of Missouri--Rolla

Publisher

University of Missouri--Rolla

Publication Date

Spring 1981

Journal article titles appearing in thesis/dissertation

  • Isotopically anomalous tellurium in Allende: Another relic of local element synthesis
  • Iodine-129 in Missouri thyroids
  • Iodine-129 in Missouri rain and milk

Pagination

ix, 100 pages

Note about bibliography

Includes bibliographical references.

Rights

© 1981 Lawrence Lee Oliver, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 4652

Print OCLC #

8663294

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Included in

Chemistry Commons

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