Holz von Vitis vinifera im Raster-Elektronenmikroskop

Charakteristische Gewebeteile und Zellelemente vom Holz des Weinstockes, Vitis vinifera L., wurden raster-elektronenmikroskopisch abgebildet. Dabei wurde auf die Ausbildung der lebenden, septierten Holzfasern besonderer Wert gelegt. Lebende, septierte Fasern treten auch im Bast auf (Bastfasern). Sie bilden alternierend mit dem Weichbast selbständige Gewebekomplexe und dienen wie die Holzfasern neben ihrer Stützfunktion vorwiegend der Stärkespeicherung. Die Bastfasern sind im Durchschnitt kürzer als die Holzfasern. Andere morphologische Unterschiede wurden nicht festgestellt.Bois de Vitis vinifera au microscope électronique à balayageLes parties caractéristiques du tissu et les éléments cellulaires du bois de vigne (Vitis vinifera L.) furent reproduits par microscopie électronique à balayage On s'est concentré particulièrement sur la formation des fibres vivantes et cloisonnées du bois. Des fibres vivantes et cloisonnées sont présentes également dans le phloème. Elles forment alternativement avec le liber mou un complexe de tissus indépendants et servent comme les fibres libriformes du xylème, en plus de leur rôle de support, surtout au stockage de l 'amidon. Les fibres de phloème sont en moyenne plus courtes que les fibres de xylème. D'autres différences morphologiques n'ont pas été constatées

Australians’ views on carbon pricing before and after the 2013 federal election

As climate policies change through the legislative process, public attitudes towards them may change as well. Therefore, it is important to assess how people accept and support controversial climate policies as the policies change over time. Policy acceptance is a positive evaluation of, or attitude towards, an existing policy; policy support adds an active behavioural component1, 3. Acceptance does not necessarily lead to support. We conducted a national survey of Australian residents to investigate acceptance of, and support for, the Australian carbon pricing policy before and after the 2013 federal election, and how perceptions of the policy, economic ideology, and voting behaviour affect acceptance and support. We found acceptance and support were stable across the election period, which was surprising given that climate policy was highly contentious during the election. Policy acceptance was higher than policy support at both times and acceptance was a necessary but insufficient condition of support. We conclude that acceptance is an important process through which perceptions of the policy and economic ideology influence support. Therefore, future climate policy research needs to distinguish between acceptance and support to better understand this process, and to better measure these concepts

15. Jahrestagung der Gesellschaft fuer Oekologie

SIGLETIB Hannover: RO 928(15) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Synthesis of novel diazabicycles and their antiprotozoal activities

We describe the synthesis of new diaryl substituted diazabicyclo[3.2.1] octanes from diazepanes which were prepared by the reduction of diazepanones. The formation of the bicyclic system was optimized by microwave irradiation and the structures of the new compounds were established by single crystal structure analysis and NMR spectroscopy. All new compounds were tested for their potencies against Plasmodium falciparum K-1 and Trypanosoma b. rhodesiense, the causative organisms of malaria tropica and the East African form of sleeping sicknes