Stückgutförderung von Mikroteilen mit der Schwingrinne

Der vorliegende Beitrag greift das Auftreten von Größeneffekten auf, welche auf dem WGTL-Kolloquium 2006 vorgestellt worden sind und nun Gegenstand tiefer gehender Forschung sind. Dabei handelt es sich um einen Wechsel von Sekundäreffekten zu Primäreffekten, ausgelöst durch das Downscaling der Bauteildimensionen und somit eines veränderten Verhältnisses von der Masse zur Oberfläche. Es werden erste Ergebnisse aus der Abschätzung der Kräfte vorgestellt, und die Auswirkungen dieser Kräfte auf den Fördervorgang diskutiert.

Approximation und Berechnung von Zufallsgrößen anhand der Finite-Elemente-Methode

Es wird ein Verfahren vorgestellt, mit dem stetige Zufallsgrößen rechnerunterstützt dargestellt und miteinander verknüpft werden können. Die Verteilungsfunktionen der Zufallsgrößen werden mit einem Finite-Elemente-Ansatz in einem endlichen Intervall [tmin; tmax] approximiert. Die Addition zweier Zufallsgrößen wird durch numerische Berechnung des Faltungsintegrals durchgeführt.

Dr. Rainer Erb at the ZFA (Zentrum für Antisemitismusforschung; Center for Research on Antisemitism); Berlin Portraits Men

Digital Image

Wrestling Card - Bobby Bruns

The wrestler's name is Bobby Bruns and the number stamped on the reverse is 536. There is also some handwriting "Mid Western wrestling champion".

Forst, Rainer. Toleration in conflict: past and present. New York: Cambridge University Press; 2013, 635 p.

Reseña del libro

Fases da germinação de sementes de Annona emarginata (Schltdl.) H. Rainer em diferentes temperaturas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação de substratos na emergência de plântulas de araticum-de-terra-fria (Annona emarginata (Schltdl.) H. Rainer)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desiccation tolerance in seeds of Annona emarginata (Schldtl.) H. Rainer and action of plant growth regulators on germination

Annona emarginata (Schldtl.) H. Rainer (araticum-de-terra-fria) is used as a rootstock for several species of Annonaceae. It is suggested that these seeds should be sown immediately after extraction and, therefore, they could be intolerant to desiccation. There are several mechanisms involved with desiccation tolerance. Soluble sugars, for example, can accumulate and act as osmoprotectants for the membrane system during desiccation. The aim of this study is to assess desiccation tolerance in A. emarginata seeds. In addition, we examined the soluble sugars involved in desiccation tolerance. Finally, we determined the effect of gibberellic acid (GA4+7) and N-(phenylmethyl)-aminopurine in promoting the germination of seeds with different water contents. The experiment consisted of a randomized 4×5 factorial design (desiccation levels × concentration of growth regulators). After drying, seeds containing 31 (control), 19, 12 and 5% water were incubated in different concentrations of GA4+7 N-(phenylmethyl)-aminopurine (0, 250, 500, 750 and 1000 mg L-1) for 60 hours. The experiment was conducted in a germination chamber with alternating temperature and photoperiod of 20oC for 18 hours of darkness and 30oC for 6 hours of light. We analyzed electrical conductivity, germination rate, mean germination time, germination speed, frequency and uniformity of germination, percentage of dormant seeds and soluble sugar profile in intact seeds through high-performance liquid chromatography (HPLC). The data were subjected to analysis of variance, and the means were compared using Tukey's test at a threshold of p<0.05. The results showed that seeds of A. emarginata appears to be desiccation tolerant and, also, that sucrose increases when seed water content is reduced to values as low as 12%, exogenous GA4+7+N-(phenylmethyl)-aminopurine improves its germinability.

Trocas gasosas, índices fisiológicos e acúmulo iônico em plantas jovens de Annona emarginata (Schltdl.) H. Rainer em solução nutritiva

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento de plantas jovens de Annona emarginata (SHLTDL.) H. Rainer (Araticum-de-terra-fria) cultivadas e solução nutritiva

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Tolerância à dissecação e armazenamento de sementes de Araticum-de-terra-fria (Annona emarginata) (SCHLTDL.) H. Rainer)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Condicionamento osmótico e GA3 na germinação de sementes de araticum de terra fria (Annona emarginata (Schltdl.) H. Rainer)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)