Elfriede Weber

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Room-temperature ultraviolet lasing in semiconductor nanowire arrays has been demonstrated. The self-organized, <0001> oriented zinc oxide nanowires grown on sapphire substrates were synthesized with a simple vapor transport and condensation process. These wide band-gap semiconductor nanowires form natural laser cavities with diameters varying from 20 to(More)
Solidago altissima and S. gigantea were introduced from North America to Europe ~250 yr ago and are now considered aggressive weeds in abandoned fields and conservation areas. We studied patterns of genetic differentiation in these two species along their present latitudinal range in Europe (44-61 degrees N). Two generations of clonally propagated ramets(More)
Institute Julius Kühn-Institut – Bundesforschungsinstitut für Kulturpflanzen, Braunschweig1 formerly BASF AG , Limburgerhof2 formerly Biologische Bundesanstalt für Landund Forstwirtschaft, Kleinmachnow3 Institut für Gemüseund Zierpflanzenbau, Großbeeren/Erfurt4 formerly Bayer CropScience GmbH, Leverkusen5 Bayer CropScience GmbH, Industriepark Höchst,(More)
Germination, growth, and physiological responses of hybridizing Carpobrotus from coastal California to soil salinity were studied. Hybrids are presumably the result of hybridization and introgression between the exotic Carpobrotus edulis, a succulent perennial invading coastal habitats, and the native or long-naturalized C. chilensis. Germination responses(More)
bezogen sind, verteilte sieh fiber P1--P3 mit 10--15°/o; 580/0 wies die 15sliche Fraktion auf. 57 °/o der sauren Phosphatase befanden sich in P3, Cathepsin zu 41°/o und fi-Glucuronidase zu 58o/o in P~, was ffir eine unterschiedliche Verankerung der Phosphomonoesterase gegeniiber den beiden anderen lysosomalen Enzymen im Thrombocyten spricht. Der Antefl(More)
suchungen an Ehrlich-M/~use-Ascites-Carcinomzellen, Leukocyten und Blutpl~ttchen lassen solche Zusammenh/~nge nicht erkennen, nachdem auch stundenlange Vorbehandlung der Zellen mit hohen Konzentrationen (bis 10 -3 M) verschiedener Stoffwechselgifte der Glykolyse, des Citronens/~urecyclus und der Atemkettenphosphorylierung bei 37°C oder Anwendung des(More)
Isolated rabbit hearts were perfused with Tyrode solution containing 10 ng/ml (-)-noradrenaline for 20 min. The uptake by the heart of noradrenaline was calculated by estimating the percentage of amine removed from the perfusion fluid during a single passage through the heart. Previous experiments have shown that the amount of noradrenaline removed from the(More)