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Combined substantial-energetic Utilization of Biogenous Residues for the Production of Biogenous Silica, REE and Noble Metals as Catalytic Compounds for Emission Reduction
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Verbrennung regional verfügbarer Reststoffe zur energetischen Nutzung von Biomasse und zur gekoppelten Erzeugung von biogenem Silika für Feinstaubfilter-Prozesse (PaCoSil)
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Sequestration of heavy metals and radionuclides in ectomycorrhiza
Full text linkThe involvement of microorganisms such as fungi, present in the environment, take part in the process of element re-distribution. Ectomycorrhiza (ECM) was investigated concerning metal and radionuclide distribution within the system soil-ECM. The development of the ECM tree partners Picea abies and Pinus sylvestris was studied in relation to a symbiosis with the early colonizer ectomycorrhizal fungi Paxillus involutus and Pisolithus tinctorius, as well as the late colonizer fungus Tricholoma vaccinum. With pot experiments, the influence of ECM on metal distribution in soil was analyzed. High bioconcentration factors (BCF) associated with metal enrichment in the fungal cell was found to correlate with low glutathione S-transferase (GST) activities. While early colonizers showed higher GST activity in the mycelium as well as in mycorrhizal roots, the late colonizer T. vaccinum had lower or even lacking GST activity. In this study was shown that basidiomycetes excrete secondary metabolites and nutrients, like sugars or amino acids, via guttation. Additionally, high Pb values were measured in guttation droplets after cultivation in Pb supplemented media, which shows detoxification for survival under harsh environmental conditions. An involvement of aquaporin proteins in guttation, by forming water channels in the membrane, could be shown too. The transfer of water as well as gases or soluble substances can be inhibited by acetazolamide and silver ions which led to less guttation and altered element contents in the guttation fluid. Here, fungi could be shown to determine element concentrations in their host plant, and keep homeostasis within their cells by support of the GST enzyme as well as excreting metals with guttation. Thus, the role of fungi in element cycling can be followed and furthermore potentially find applications
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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