Correlating electronic and magnetic coupling in large magnetic molecules via scanning tunneling microscopy

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Ein Lacertilier (Scincomorpha, Paramacellodidae) aus dem Oberen Jura von Tendaguru (Tansania)

Seit einigen Jahren werden die Funde großer Wirbeltiere aus der oberjurassischen Fossilfundstelle Tendaguru in Tansania durch diverse Mikrovertebraten ergänzt. Diese konnten durch gezieltes Schlämmen von Sedimentmaterial gewonnen werden (Heinrich, mündl. Mitt.), das während der Tendaguru-Expeditionen von 1908 bis 1913 gewonnen wurde. Durch ein isoliertes Kieferfragment kann der Erstnachweis eines paramacellodiden Lacertiliers im Afrika südlich des Äquators (bei 10° südlicher Breite) geführt werden. Dieser Fund rundet das Bild der sehr weiten Verbreitung dieser erfolgreichen mesozoischen Echsengruppe ab. Recently, there have been additional microvertebrate finds within the known macrovertebrate fauna of the Upper Jurassic locality Tendaguru in Tanzania. This resulted from the processing of sediment samples, which had been collected during the Tendaguru Expeditions in between 1908 and 1913 (Heinrich, pers. Comm.). An isolated jaw fragment from a paramacellodid lizard is the first record of this family within the African continent below the equator (10° degrees Southern latitude). The occurence of this successful Mesozoic lizard group in Tendaguru reflects a greater global distribution than known to date. doi:10.1002/mmng.1999.4860020111</a

Ein Lacertilier (Scincomorpha, Paramacellodidae) aus dem Oberen Jura von Tendaguru (Tansania)

Seit einigen Jahren werden die Funde großer Wirbeltiere aus der oberjurassischen Fossilfundstelle Tendaguru in Tansania durch diverse Mikrovertebraten ergänzt. Diese konnten durch gezieltes Schlämmen von Sedimentmaterial gewonnen werden (Heinrich, mündl. Mitt.), das während der Tendaguru-Expeditionen von 1908 bis 1913 gewonnen wurde. Durch ein isoliertes Kieferfragment kann der Erstnachweis eines paramacellodiden Lacertiliers im Afrika südlich des Äquators (bei 10° südlicher Breite) geführt werden. Dieser Fund rundet das Bild der sehr weiten Verbreitung dieser erfolgreichen mesozoischen Echsengruppe ab. Recently, there have been additional microvertebrate finds within the known macrovertebrate fauna of the Upper Jurassic locality Tendaguru in Tanzania. This resulted from the processing of sediment samples, which had been collected during the Tendaguru Expeditions in between 1908 and 1913 (Heinrich, pers. Comm.). An isolated jaw fragment from a paramacellodid lizard is the first record of this family within the African continent below the equator (10° degrees Southern latitude). The occurence of this successful Mesozoic lizard group in Tendaguru reflects a greater global distribution than known to date. doi:10.1002/mmng.1999.4860020111</a

Evaluation of genotoxicity through micronuclei test in workers of car and battery repair garages

In this study, the micronuclei test (MNT) was applied in exfoliated cells of buccal mucosa, in order to evaluate the genotoxic risk associated with occupational exposure of mechanics, storage battery renovation workers, and car painters. For each individual, 3000 exfoliated buccal cells were analyzed. There was a significantly higher frequency of micronucleated cells (MNC) in the exposed workers than in controls. Smoking and drinking habits, age, and working time did not represent significant factors in terms of increasing the production of micronuclei (MN), when the control and the exposed groups were compared. These results allowed to conclude that the studied individuals belong to a risk group and should periodically undergo biological monitoring and proper care