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    Ein Quantenpunkt-Mikrolaser schickt Licht aus, das über einen Spiegel gezielt in den Laser zurückgeworfen wird. Das stört den Laserbetrieb derart, dass es zu einem chaotischen Emissionsverhalten kommt. Rechts das Ergebnis einer Messung zur Photonenstat

    Würzburg physicists have created a microlaser with unique properties. They have also succeeded in making the laser behave chaotically. In the future, it may be possible to use this for a new, secure form of data transmission.

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    Die Blattlaus Sitobion avenae, ein Getreideschädling, und einer ihrer größten natürlichen Feinde, der Siebenpunkt-Marienkäfer. Fotos: Iris Gallenberger

    Farmers who spray insecticides against aphids as a preventative measure only achieve a short-term effect with this method. In the long term, their fields will end up with even more aphids than untreated fields.

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    Familiar view

    05/18/2011
    Biene

    What happens when bees are displaced to unfamiliar locations? Quite a few of them find their way back to the hive even from great distances – provided that a certain condition is satisfied. The relevant details are reported by researchers from Würzburg and Canberra in a new publication.

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    Der Anionenkanal SLAH3 misst den Wasserverbrauch, den Nitratgehalt und die Photosyntheseleistung der Pflanze. Als Reaktion darauf reguliert er den Öffnungszustand der Blattporen. Für seine Aktivierung ist neben den Botenstoffen Abscisinsäure (ABA) und

    Rising levels of nitrate and of the hormone abscisic acid signal to a plant that it needs to conserve water. How do these two transmitters achieve their effect? Plant researchers Rainer Hedrich and Dietmar Geiger from the University of Würzburg have found the answer.

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    Landschaft mit gelb blühenden Rapsfeldern. Foto: Andrea Holzschuh

    Bright yellow with an intense aroma: rape fields dominate whole landscapes in April. Their abundance of flowers is so attractive to bumblebees that wild plants are being increasingly neglected by pollinators, as proven by researchers from the University of Würzburg’s Biocenter.

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    Kapillaren im Hirnschnitt

    To date, accumulations of fluid in the brain, which occur after a stroke, have been very difficult to treat. Researchers from the University of Würzburg have now found a solution to the problem. Their work is reported on in the journal Stroke.

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    Levansucrase

    Researchers from Würzburg and Braunschweig have deciphered how a particular enzyme naturally constructs large sugar molecules. Armed with this knowledge they can now produce customized sugar for use in the food industry as prebiotics.

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    Harmen Hendriksma

    A global decline in bee numbers has been giving cause for concern for many years now. The reasons for the sudden loss of whole colonies remain unclear. Biologists from the University of Würzburg have now developed a new approach that might help shed light on this issue.

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    Würfel (Uwe-Jens Kahl/pixelio.de)

    Humans can estimate quantities of up to four objects accurately. When there are more than four, they have to start counting. This innate limit is also reflected in the counting systems of ancient civilizations.

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    Grafik, die die hormonellen Zusammenhänge zwischen Gehirn, Hirnanhangsdrüse und Nebennierenrinde zeigt. Grafik: Melanie Ullrich

    First discovered ten years ago, it is now the subject of new findings relating to its function: the protein SPRED2 inhibits the hormonal stress response in the body. Whether it also plays a role in the development of illnesses has yet to be established.

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    Eine Brustkrebszelle (gelb) unter dem Elektronenmikroskop. Wissenschaftler vom Biozentrum der Universität Würzburg beschreiben jetzt in der Zeitschrift „Molecular Cell“ einen Rückkoppelungsmechanismus, der die Aktivität des Krebsgens Myc reguliert

    Cancer can develop when genes get out of control. A feedback mechanism to prevent just that is reported by scientists from the Biozentrum of the University of Würzburg in “Molecular Cell”.

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    Vertragsunterzeichnung

    Over the coming months, all students in Würzburg will be receiving new ID cards. The new card is multifunctional and forgery-proof thanks to its modern encryption technology. The project has three sponsors.

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    Handy-Tastatur

    People who feel they just do not get enough calls should perhaps take a closer look at their phone number. If the string of digits, written as an SMS, would produce a word with an unpleasant connotation, potential callers may feel ill at ease dialing it - even if they are completely unaware of its literal meaning.

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    Eine regulatorische T-Zelle (Mitte) hat sich eng an eine normale T-Zelle des Immunsystems geschmiegt und pumpt sie mit dem Signalstoff cAMP voll. In der „Nehmerzelle“ bewirkt das eine Abnahme des Proteins NFAT; die Färbung fällt darum weniger rot au

    Asthma, diabetes, rheumatism: Such diseases can arise when the immune system does not work properly. Researchers from the Universities of Würzburg and Mainz have discovered new findings about the regulation of the immune defense.

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    Bats Feed Plants

    01/27/2011
    Eine Kleine Wollfledermaus in ihrem Schlafquartier, einer Kanne der Kannenpflanze Nepenthes rafflesiana. Foto: Michael Schöner

    Würzburg zoologists describe a remarkable partnership in the scientific journal "Biology Letters": Tropical bats interact with carnivorous pitcher plants – for mutual benefit.

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