Radiation stability of methionine-35S and selenomethionine-75Se

I. Galaţeanu; V. Lungu; D. Viorel

doi:10.1007/bf02517731

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 33: Issue 2

Radiation stability of methionine-³⁵S and selenomethionine-⁷⁵Se

Authors:

I. Galaţeanu

I. Galaţeanu Institute of Atomic Physics Bucharest (Roumania)

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V. Lungu

V. Lungu Institute of Atomic Physics Bucharest (Roumania)

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D. Viorel

D. Viorel Polytechnical Institute Institute of Chemistry Bucharest (Roumania)

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Pages:: 273–285

Online Publication Date:: 09 Jan 2007

Publication Date:: 01 Sep 1976

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02517731

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Abstract

The radiation stability of methionine-³⁵S and selenomethionine⁷⁵Se was investigated using the methods of thin-layer chromatography, gas chromatography and ESR. Radiation decomposition of methionine-³⁵S mainly consists in an oxidation process and in the release of volatile products. The ESR-spectra of irradiated DL-methionine indicated a strong localization of the unpaired electrons on sulfur atoms. Radiation damage to selenomethionine-⁷⁵Se as a function of radiation dose proved an increased stability of this compound, and its radiation decomposition consists in the formation of oxidized products and by direct rupture of the selenium bonds accompanied by the formation of volatile compounds like CH₃SeH and SeH₂. The self-radiolysis of the aqueous solution of selenomethionine-⁷⁵Se during its storage in air leads, however, to a lower decomposition rate which consists in the release of inorganic selenium and in an oxidation process.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)