Researcher Fritz-Haber Institute, Berlin, 1959-1964. Researcher faculty physics Technology University Berlin, 1966-1969, associate professor chemistry, 1979-1983, professor, since 1984. Researcher chemistry Hahn-Meitner Institute, Berlin, 1969-1974, department head trace element research, 1974-1978, department head trace elements in biomedicine, 1978-1984, science director trace elements in health and nutrition, since 1984.
Member science committees various international associations and conferences, Italy, Finland, Venezuela and Federal Republic of Germany, since 1971. Consultant International Atomic Energy Agency, Vienna, Austria, since 1976, Fundacredesa, Caracas, Venezuela, since 1981. Member science council Bertelsmann Foundation, since 1991.
Author-editor: (book) Trace Element Analytical Chemistry in Medicine and Biology, vols. 1-6, 1981-1991, Mineral and Trace Elements in Nutrition, 1991. Editor-in-chief: Journal Trace Elements and Electrolytes in Health and Disease, since 1985.
Advisory board: Journal Radioanalytical and Nuclear Chemistry, since 1989.
1959 - 1964
1969 - 1974
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