Melanie Köhnen

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The European black poplar (Populus nigra L.) is a major species of riparian softwood forests. Due to human influences, it is one of the most threatened tree species in Europe. For restoration purposes, remaining stands may act as source populations. We analysed a natural population of P. nigra for genetic diversity and spatial genetic structure using seven(More)
We studied a case of idiopathic mucinosis follicularis which persisted for 7 months. Histologically, the strong pathological changes began within the sebaceous glands and secondarily occurred in other parts of the pilosebaceous unit. We could demonstrate by electron microscopy that all the follicular cells in this process were undifferentiated sebaceous(More)
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