Publications by authors named "K A Lennert"

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  • Freshwater ecosystems are vital for global services, but human activities like urbanization, industry, and agriculture can negatively affect water quality.
  • This study analyzed water and biofilm samples from different sections of the Danube River to observe bacterial community diversity using advanced sequencing techniques.
  • Results indicated that biofilm communities had greater taxonomic diversity than planktonic communities and showed distinct variations based on habitat and river type, with urbanized areas hosting pollution-tolerant bacteria like Acinetobacter and Pseudomonas.
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  • Rising Arctic temperatures are causing significant melting of the Greenland Ice Sheet and reducing sea ice cover, with tidewater outlet glaciers serving as key connections between glaciers and the ocean.
  • This study presents hydrographic measurements from a retreating tidewater outlet glacier near Flade Isblink Ice Cap, revealing changes in seasonal freshwater content and surface temperatures exceeding 1°C during the short open water period.
  • The melting dynamics of the glacier are heavily influenced by the retreat of adjacent sea ice and the length of time the water is open, impacting the glacier's morphology at its terminus.
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Aims: To revise 25 cases selected from Karl Lennert's personal archive (21) and Bologna and Frankfurt Registries (four) because of cytological similarities.

Methods And Results: All cases were provided with paraffin blocks and studied by immunohistochemistry and molecular techniques. While phenotyping was very informative, among molecular studies only EBER in situ-hybridization (ISH) was successful.

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Follicular lymphoma (FL) is regarded as a distinct entity in the literature as well as in the 2008 edition of the WHO classification of tumours of haematopoietic and lymphoid tissues. Nevertheless, there are still several issues that are matters of controversy such as the grading system or the exact biological location of grade 3B FL. This makes FL somewhat like the Six characters in search of an author of Pirandello's comedy.

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According to the WHO classification, anaplastic large cell lymphoma (ALCL) is a distinct T-cell lymphoma entity with a number of morphological variants. The characteristic feature of lymphohistiocytic variant of ALCL according to the WHO classification is the abundance of histiocytes that exceed and mask the tumour cell population. In the current, study we reanalysed a historical series of 17 lymphomas, diagnosed as lymphohistiocytic lymphoma according to the criteria of the Kiel classification, with the presence of large purple macrophages (LPM) as the decisive finding for diagnosing this lymphoma subtype.

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