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• Goldene Nano-Krone

  Eine "goldene Krone" von nur wenigen Nanometern Durchmesser haben chinesische Forscher kürzlich geschaffen. Es handelt sich dabei um ein großes ringförmiges Molekül, das 36 Goldatome enthält. Die Herren der Ringe, ein Team aus Wissenschaftlern von Universitäten in Peking, Hong Kong und Nanjing, beri mehr

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• A drowned Mesozoic bird breeding colony from the Late Cretaceous of Transylvania

  Despite a rapidly improving fossil record, the reproductive biology of Mesozoic birds remains poorly known: only a handful of undisputed, isolated Cretaceous eggs (some containing embryonic remains) are known. We report here the first fossil evidence for a breeding colony of Mesozoic birds, preserve mehr

• Reaktionen von 1,3‐Diphenyltriazenid mit Cu+ und Tl+Reactions of 1,3‐Diphenyltriazenide with Cu+ and Tl+ 

  Abstract 1,3‐Diphenyltriazene (1) was treated with sodium in ethanol to obtain the salt Na(1,3‐Ph2N3) (2). Compound 2 reacts with 15‐crown‐5 in EtOH to the crown ether complex [Na(15‐crown‐5)(1,3‐Ph2N3)]·0.5EtOH (3·0.5EtOH). In addition 2 was added to ethanol solutions of CuI and TlI salts to yie mehr

• A gravid lizard from the Cretaceous of China and the early history of squamate viviparity

  Abstract   Although viviparity is most often associated with mammals, roughly one fifth of extant squamate reptiles give birth to live young. Phylogenetic analyses indicate that the trait evolved more than 100 times within Squamata, a frequency greater than that of all other vertebrate clades co mehr

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