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Precipitating anti-PM-Sel antibodies are present in sera from patients with polymyositis. scleroderma. and polymyositis/scleroderma overlap syndromes. By indirect immunofluorescence microscopy. anti-PM-Scl antibodies stained the nucleolus in cells of different tissues and species. suggesting that the antigen is highly conserved. By electron microscopy, anti-PM-Scl antibodies reacted primarily with the granular component of the nuc1eolus. Drugs that inhibit rRNA synthesis had a marked effect on the expression of PM-Scl antigen. In actinomycin D-treated cells, immunofluorescence staining by anti-PM-Scl was signüicantly reduced with residual staining restricted to the granular regions of nuc1eoli. Treatment with 5,6-dichloro-beta-D- ribofuranosylbenzimidazole (DRB) also selectively reduced nuc1eolar staining. On a molecular level, anti-PM-Sel antibodies precipitated 11 polypeptides with molecular weights (Mr) ranging from 110,000 to 20,000. The Mr 80,000 and 20.000 polypeptides were phosphorylated. Evidence suggests that the PM-Scl antigen complex may be related to a prerlbosomal particle.
Im Freistaat Bayern wird intensiv diskutiert, wie die nach wie vor hohe Freiflächeninanspruchnahme für Siedlungs- und Verkehrszwecke reduziert werden kann. Wissenschaftliche Grundlage für Steuerungsansätze in der Stadt- und Regionalentwicklung sollte ein verbessertes staatliches Flächenmonitoring sein, welches über die amtliche Statistik und deren Hauptindikator "Siedlungs- und Verkehrsfläche" hinaus auch die qualitative Dimension der Flächeninanspruchnahme einbezieht. Dafür stellt dieser Beitrag methodische Erweiterungsansätze für das Flächenmonitoring vor, welche kleinräumige Analysen der Zersiedelung, Freiraumstruktur, Flächenversiegelung und Ökosystemleistungen am Beispiel des Landkreises Rhön-Grabfeld aufzeigen. Diese werden im Kontext der Debatte zu Ursachen und Steuerung der Freiflächeninanspruchnahme sowie zu aktuellen Anforderungen an das Flächenmonitoring diskutiert. Betont wird deren Bedeutung für das Monitoring rechtlicher Vorgaben und politischer Ziele zur nachhaltigen Flächennutzung.
The issue of sustainability is at the top of the political and societal agenda, being considered of extreme importance and urgency. Human individual action impacts the environment both locally (e.g., local air/water quality, noise disturbance) and globally (e.g., climate change, resource use). Urban environments represent a crucial example, with an increasing realization that the most effective way of producing a change is involving the citizens themselves in monitoring campaigns (a citizen science bottom-up approach). This is possible by developing novel technologies and IT infrastructures enabling large citizen participation. Here, in the wider framework of one of the first such projects, we show results from an international competition where citizens were involved in mobile air pollution monitoring using low cost sensing devices, combined with a web-based game to monitor perceived levels of pollution. Measures of shift in perceptions over the course of the campaign are provided, together with insights into participatory patterns emerging from this study. Interesting effects related to inertia and to direct involvement in measurement activities rather than indirect information exposure are also highlighted, indicating that direct involvement can enhance learning and environmental awareness. In the future, this could result in better adoption of policies towards decreasing pollution.