RESUMO
In recent decades efforts have been made to meet societal expectations concerning public access to information and to enable citizens' informed decision-making related to ionising radiation risks. But are people satisfied with the information provided and which factors influence this? This paper investigates lay persons' satisfaction with the information about ionising radiation provided by different communicators in Belgium and France. In particular, it studies the potential influence of risk perception, confidence in authorities, knowledge and education. The study is based on data originating from large scale public opinion surveys (N = 1002 in Belgium; N = 966 in France). Results show that the two countries differ as regards satisfaction with the information provided by specific communicators. Confidence in authorities was revealed in both countries as more important for satisfaction with information than risk perception. Contrary to expectations, general knowledge about ionising radiation had limited or no explanatory power. An additional study for the Belgian sample showed that both perceived trustworthiness and technical competence influence satisfaction with information, but their relative importance depends on the communicator.
RESUMO
A multistep deposition of anatase nanoparticles was employed to incorporate high amounts of titania into the mesopores of SBA-15. Anatase nanoparticles were synthesized and deposited following the Acid Catalyzed Sol Gel method. With this method, the size of the anatase nanoparticles can be controlled and therefore, the titania loading into the mesopores of SBA-15 can be controlled. Through multistep deposition of anatase nanoparticles, a further increase of titania loading into the mesoporous channels can be obtained. For the degradation of Rhodamine-6G, the samples synthesized by multistep deposition showed an enhanced photocatalytic activity.
Assuntos
Cristalização/métodos , Nanoestruturas/química , Nanoestruturas/ultraestrutura , Nanotecnologia/métodos , Fotoquímica/métodos , Dióxido de Silício/química , Titânio/química , Catálise , Luz , Substâncias Macromoleculares/química , Teste de Materiais , Conformação Molecular , Nanoestruturas/efeitos da radiação , Tamanho da Partícula , Porosidade , Dióxido de Silício/efeitos da radiação , Propriedades de Superfície , Titânio/efeitos da radiaçãoRESUMO
Here we present the first comprehensive genetic linkage map of the heterothallic oomycetous plant pathogen Phytophthora infestans. The map is based on polymorphic DNA markers generated by the DNA fingerprinting technique AFLP (Vos et al., 1995, Nucleic Acids Res. 23: 4407-4414). AFLP fingerprints were made from single zoospore progeny and 73 F1 progeny from two field isolates of P. infestans. The parental isolates appeared to be homokaryotic and diploid, their AFLP patterns were mitotically stable, and segregation ratios in the F1 progeny were largely Mendelian. In addition to 183 AFLP markers, 7 RFLP markers and the mating type locus were mapped. The linkage map comprises 10 major and 7 minor linkage groups covering a total of 827 cM. The major linkage groups are composed of markers derived from both parents, whereas the minor linkage groups contain markers from either the A1 or the A2 mating type parent. Non-Mendelian segregation ratios were found for the mating type locus and for 13 AFLP markers, all of which are located on the same linkage group as the mating type locus. Copyright 1997 Academic Press
