73. Jahresversammlung (1960) zu Salzburg

Ohne Zusammenfassung     

Zur Flora des Unterberges in Salzburg

Ohne Zusammenfassung     

Einige bemerkenswerte Flechtenparasiten aus dem Pinzgau in Salzburg

Ohne ZusammenfassungZum Schlusse erfülle ich eine angenehme Pflicht, wenn ich Herrn Abteilungsleiter Dr. A. Zahlbruckner und Herrn Schulrat Dr. J. Steiner meinen Dank für einige freundliche Winke bei Bestimmung der Flechtenparasiten ausspreche.     

Flora des Untersberger Moorgebietes und seiner Umgebung bei Salzburg

Ohne Zusammenfassung     

The Chernobyl fallout in Salzburg/Austria and its effect on blood chromosomes

The radioactive fallout of the Chernobyl accident caused an increase in radiation dose of 20 to 110 per cent over the normal environmental burden to the inhabitans of Salzburg City in Austria (in a distance of about 1300 km from the accident). The structural chromosome aberration in the lymphocytes of the peripheral blood of 15 test-persons have been investigated one year after the accident. From two of these we know also the aberration frequencies before the accident which were significantly lower. The results from all test persons were pooled according to their Cs137 and Cs134 content, measured by whole body counter. Their mean additional blood doses from the incorporated caesium plus the external fallout radiation were 0.23, 0.36 and 0.55 mGy/yr. The aberration frequencies increased with dose. The slope of the best straight-line through the points was 2.0 +/- 0.7 total chromosome type aberrations in 100 metaphases per mGy/yr. This result fits in well with former investigations of persons with individually calculated radiation burden from the environment. The sharp increase with dose at this low level is not compatible with values extrapolated from high doses. The usual dose assessment based on chromosome aberrations extrapolated from high to low doses is therefore not possible in the range considered in this investigation.     

I. I. Mechnikoff's contribution to immunology

I. I. Mechnikoff's contribution to various aspects of immunology is evaluated. The 25 years' struggle of this scientist for the existence of phagocytosis theory is briefly described. Works of I. I. Mechnikoff dealing with several factors of humoral immunity and cytotoxins are reviewed. The significance of I. I. Mechnikoff's studies providing analysis of immune processes in the phylogenetic sense as well as his ideas about the nervous system role in immunity processes is stressed.