Quantum behavior with a flash

Just as a camera flash illuminates unseen objects hidden in darkness, a sequence of laser pulses can be used to study the elusive quantum behavior of a large "macroscopic" object. This method provides a novel tool of unprecedented performance for current experiments that push the boundaries of the quantum world to larger and larger scales.

High content screening of zebrafish greatly speeds up nanoparticle hazard assessment

With the mass production of engineered nanoparticles, risk assessment efforts are in need of platforms that offer predictive value to human health and environment, and also possess high throughput screening capacity. Scientists, when turning to a model-organism to help answer genetic questions that cannot be easily addressed in humans, often chose the zebrafish. However, the current screening process in zebrafish involves mostly counting the survival rate, hatching and developmental abnormalities etc. through visual examination of each embryo and/or larvae under a dissecting microscope. Such process is time-consuming, labor-intensive and has limitations on data acquisition as well as statistics analysis. Researchers have now successfully demonstrated two high content imaging platforms to enhance the ability to screen the toxicological effects of nanoparticles in zebrafish embryos.

UDE-Tagung: Schaden Nanomaterialien der Gesundheit?

Welche Wege Nanopartikel im Organismus nehmen und was das fuer Folgen hat, erforschen seit drei Jahren Wissenschaftler in Deutschland unter Leitung der Uni Duisburg-Essen. Nun liegen erste Ergebnisse vor, die sie vom 11. bis 15. September bei einer internationalen Konferenz am Campus Essen diskutieren wollen: "International Conference on Biological Responses to Nanoscale Particles".

Taming light – Mastering the fine structuring of ultrashort light fields

An expedition through the fast-paced microscopic world of atoms reveals electrons that spin at enormous speeds and the gigantic forces that act on them. Monitoring the ultrafast motion of these electrons requires ultrashort flashes of light. However, in order to control them, the structure of these light flashes, or light pulses, needs to be tamed as well. This type of control over light pulses has now been achieved, for the first time.