Antibiotics: City dwellers and children take the most

City dwellers take more antibiotics than people in rural areas; children and the elderly use them more often than middle-aged people; the use of antibiotics decreases as education increases, but only in rich countries: These are three of the more striking trends identified by researchers of the NRW Forschungskolleg “One Health and Urban Transformation” at the University of Bonn in a recent study. They evaluated 73 publications on the use of antibiotics in the outpatient sector around the world. The subject is of great importance: Too many antibiotics are still being administered. Possible consequences are resistances: Already there are hardly any effective drugs available against some bacteria. The study will be published in May in the International Journal of Hygiene and Environmental Health, but is already available online.

Unexpected discovery: Blue-green algae produce oil

Cyanobacteria - colloquially also called blue-green algae - can produce oil from water and carbon dioxide with the help of light. This is shown by a recent study by the University of Bonn. The result is unexpected: Until now, it was believed that this ability was reserved for plants. It is possible that blue-green algae will now also become interesting as suppliers of feed or fuel, especially since they do not require arable land. The results have now been published in the journal PNAS.

Rare lizard fossil preserved in amber

The tiny forefoot of a lizard of the genus Anolis was trapped in amber about 15 to 20 million years ago. Every detail of this rare fossil is visible under the microscope. But the seemingly very good condition is deceptive: The bone is largely decomposed and chemically transformed, very little of the original structure remains. The results, which are now presented in the journal "PLOS ONE", provide important clues as to what exactly happens during fossilization.

How our brain detects fine differences

How do we manage to find our way around our neighborhood even though the streets look so similar? Researchers at the University of Bonn have gained new insights into a mechanism that very likely plays a major role in this ability. Especially interesting: It only seems to work well when our brain is oscillating in a special rhythm. The results have been published in the journal "eLife".

University of Bonn and German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE) recruit knowledge sociologist Anna-Katharina Hornidge

Professor Anna-Katharina Hornidge has accepted the Professorship of Global Sustainable Development at the University of Bonn and has been appointed Director of the German Development Institute / Deutsches Institut für Entwicklungspolitik (DIE). She will take up these positions on 1 March 2020.

Extreme sea-level rise 130,000 years ago

Rising sea temperatures more than 100,000 years ago drove the melting of the Antarctic ice sheets and caused an extreme rise in sea level, as a new international study involving the University of Bonn shows. According to the scientists, the current situation is again moving in this direction. The massive melting of the West Antarctic ice sheet was a major cause of the high sea level during a period known as the last interglacial period (129,000 to 116,000 years ago). The research results are now published in the “Proceedings of the National Academy of Sciences (PNAS)”.

Stroke: Macrophages migrate from the blood

Macrophages are part of the innate immune system and essential for brain development and function. Using a novel method, scientists from Jena University Hospital, the University of Bonn and the Memorial Sloan Kettering Cancer Center in New York (USA) succeeded in visualizing macrophages that were formed in the bone marrow. In studies on mice, this technology enabled the researchers to observe that shortly after a stroke, numerous macrophages that had migrated from the blood begin to attack dead and adjacent healthy brain tissue. The results have now been published in the journal "Nature Neuroscience".

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