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Erste Ergebnisse einer Fallstudie zur Stoffdynamik naturschutzrelevanter Böden der Döberitzer Heide
(1997)
Im Großtrappenschutzgebiet "Belziger Landschaftswiesen" wurden an ausgewählten Standorten mikrobielle Aktivitäten, die im Zusammenhang mit dem Stickstoffkreislauf stehen, überprüft und bewertet. Es werden auch Möglichkeiten erörtert, die der Bildung bzw. Akkumulation pflanzenverfügbarer Stickstofformen mit geeigneten Bewirtschaftungsmaßnahmen entgegenwirken.
Inhalt: Katja Mönnich: Eine Freundschaft, die Jahrzehnte überdauerte! Ein unveröffentlichter Brief Alexander von Humboldts an seinen langjährigen Freund Johann Karl Freiesleben Detlev Doherr: Interconnectedness und digitale Texte Ursula Thiemer-Sachse: Steinpatrizen aus dem alten Kolumbien zur Vorbereitung des Gusses von Goldobjekten in verlorener Form - Alexander von Humboldts "Kalendersteine" der Muisca Birgit Schneider: Berglinien im Vergleich - Bemerkungen zu einem klimageografischen Diagramm Alexander von Humboldts Ingo Schwarz: Friedrich L. Brand - 1922 bis 2012 Eberhard Knobloch: "Es wäre mir unmöglich nur ein halbes Jahr so zu leben wie er": Encke, Humboldt und was wir schon immer über die neue Berliner Sternwarte wissen wollten
In soils of the Rustenbug Minig Area microorganism concentration and activity of several enzymes (dehydrogenase, phosphatase, protease, amylase, cellulase, xylanase) were determined. First results indicate an increase of heavy metal resistant Microorganisms and a possible inhibition of carbohydrate degrading enzymes.
Rieselfelder
(2000)
SKOR and GORK are outward-rectifying plant potassium channels from Arabidopsis thaliana. They belong to the Shaker superfamily of voltage-dependent K+ channels. Channels of this class are composed of four alpha-subunits and subunit assembly is a prerequisite for channel function. In this study the assembly mechanism of SKOR was investigated using the yeast two-hybrid system and functional assays in Xenopus oocytes and in yeast. We demonstrate that SKOR and GORK physically interact and assemble into heteromeric K-out channels. Deletion mutants and chimeric proteins generated from SKOR and the K-in channel alpha-subunit KAT1 revealed that the cytoplasmic C-terminus of SKOR determines channel assembly. Two domains thatchannel a-subunit KAT1 revealed that the cytoplasmic C-terminus of SKOR determines channel assembly. Two domains that are crucial for channel assembly were identified: i), a proximal interacting region comprising a putative cyclic nucleotide-binding domain together with 33 amino acids just upstream of this domain, and ii), a distal interacting region showing some resemblance to the K-T domain of KAT1. Both regions contributed differently to channel assembly. Whereas the proximal interacting region was found to be active on its own, the distal interacting region required an intact proximal interacting region to be active. K-out alpha-subunits did not assemble with K-in alpha-subunits because of the absence of interaction between their assembly sites
A lasting legacy of the International Polar Year (IPY) 2007–2008 was the promotion of the Permafrost Young Researchers Network (PYRN), initially an IPY outreach and education activity by the International Permafrost Association (IPA). With the momentum of IPY, PYRN developed into a thriving network that still connects young permafrost scientists, engineers, and researchers from other disciplines. This research note summarises (1) PYRN’s development since 2005 and the IPY’s role, (2) the first 2015 PYRN census and survey results, and (3) PYRN’s future plans to improve international and interdisciplinary exchange between young researchers. The review concludes that PYRN is an established network within the polar research community that has continually developed since 2005. PYRN’s successful activities were largely fostered by IPY. With >200 of the 1200 registered members active and engaged, PYRN is capitalising on the availability of social media tools and rising to meet environmental challenges while maintaining its role as a successful network honouring the legacy of IPY.