Marike Kolossa

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The suitability of ejaculated bovine spermatozoa as an in vitro model for the assessment of the cytotoxic potential of chemicals was evaluated using several endpoints: swimming activity, adenine nucleotide content, membrane integrity and oxygen consumption. A series of chlorophenols inhibited sperm motion (motility and velocity) in a concentration-dependent(More)
It was examined whether computerized image analysis (system "Brunner") is suitable for the objective evaluation of the quality of deep-frozen bull sperm obtained from the routine of breeding stations. Egg yolk particles similar in size to sperm heads were classified as immotile sperm. Thus, motility was significantly underestimated with the degree of(More)
A chemically 'defined' extender for the cryopreservation of bovine spermatozoa was developed using commercially available lecithin as an additive to protect cells against freeze damage. The effectiveness of different media in preventing cryoinjury was evaluated by assessing motion activity immediately post-thaw and after 2 h incubation at 37 degrees C by(More)
Vom 26. bis zum 28. März 2014 findet in Berlin die jährliche Fortbildungsveranstaltung für den Öffentlichen Gesundheitsdienst statt. Die Teilnahme ist kostenlos. Gemeinsame Veranstalter dieser Fortbildung sind das Bundesinstitut für Risikobewertung (BfR), das Robert KochInstitut (RKI) und das Umweltbundesamt (UBA). Die Veranstaltung ist nicht öffentlich.(More)
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