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Bei einer aktuellen Studie am Iberg in Bad Grund konnten im September 2010 acht Fledermausarten parasitologisch untersucht werden. Die Faenge ergaben Nachweise von 11 Ektoparasitenarten (Fledermausfliegen, Floehe, Flughaut- und Ohrmilben), wobei einige davon Erstfunde fuer Niedersachsen sind. Aus den Fundangaben wurden Parasitenspektren fuer die einzelnen Wirtsarten erstellt und durch weitere unveroeffentlichte Meldungen ergaenzt. Fuer den Vergleich von Ektoparasitenspektren verschiedener Wirtsarten erfolgte die Einfuehrung einer Formel, die die Berechnung einer allgemeinen "Parasitenlast" ermoeglicht. Die Betrachtung der Verteilung von Ektoparasiten auf Individuen zeigte eine starke Trennung verschiedener Parasitengruppen, ein synchrones Vorkommen wurde nur selten registriert. Moeglicherweise ist die Konkurrenz zwischen Ektoparasitenarten ein bisher unterschaetzter determinierender Faktor fuer die Praesenz auf einem Wirt.
Following up on an exchange about the relation between microsaccades and spatial attention (Horowitz, Fencsik, Fine, Yurgenson, & Wolfe, 2007; Horowitz, Fine, Fencsik, Yurgenson, & Wolfe, 2007; Laubrock, Engbert, Rolfs, & Kliegl, 2007), we examine the effects of selection criteria and response modality. We show that for Posner cuing with saccadic responses, microsaccades go with attention in at least 75% of cases (almost 90% if probability matching is assumed) when they are first (or only) microsaccades in the cue target interval and when they occur between 200 and 400 msec after the cue. The relation between spatial attention and the direction of microsaccades drops to chance level for unselected microsaccades collected during manual-response conditions. Analyses of data from four cross-modal cuing experiments demonstrate an above-chance, intermediate link for visual cues, but no systematic relation for auditory cues. Thus, the link between spatial attention and direction of microsaccades depends on the experimental condition and time of occurrence, but it can be very strong.
Two recent studies (Johnson et al., 2005; Perez-Leroux, 2006) found that English- and Spanish-learning children do not show the ability to use verb inflection as a cue to subject number before the age of 5 to 6 years. These findings suggest an asymmetric development as verb inflections are usually correctly produced before this age. In the present study we investigated whether German 3- to 4-year-olds take advantage of the information provided by the verb inflection in sentence comprehension. In a first study, children's looking behavior at two pictures was measured after presentation of a sentence in which the subject number was coded only by the verb inflection. The results from this study suggest that children's looks reflect correct interpretation of the sentences and thus show their ability to make use of verb inflection. In a second experiment, preferential looking was combined with an additional task in which the children had to point to the matching picture. in this case children did not perform above chance level. Our results underline the relevance that specific task demands have on the performance of children in comprehension testing. These have to be accounted for when interpreting findings on production and comprehension asymmetries in language acquisition.
Wer sagt, was Leben ist? : Perspektiven der Debatte um eine lebenswissenschaftliche Philologie
(2010)
Homopolymers of N-acryloyl glycinamide were prepared by reversible addition-fragmentation chain transfer polymerization in water. The formed macromolecules exhibit strong polymer-polymer interactions in aqueous milieu and therefore form thermoreversible physical hydrogels in pure water, physiological buffer or cell medium.
WIP proteins form a plant specific subfamily of C2H2 zinc finger (ZF) proteins. In this study, we functionally characterized the WIP domain, which consists of four ZF motifs, and discuss molecular functions for WIP proteins. Mutations in each of the ZFs lead to loss of function of the TT1/WIP1 protein in Arabiopsis thaliana. SV40 type nuclear localisation signals were detected in two of the ZFs and functionally characterized using GFP fusions as well as new mutant alleles identified by TILLING. Promoter swap experiments showed that selected WIP proteins are partially able to take over TT1 function. Activity of the AtBAN promoter, a potential TT1 target, could be increased by the addition of TT1 to the TT2-TT8-TTG1 regulatory complex.
We consider a solution of the nonlinear Klein-Gordon equation perturbed by a parametric driver. The frequency of parametric perturbation varies slowly and passes through a resonant value, which leads to a solution change. We obtain a new connection formula for the asymptotic solution before and after the resonance.
Warum vertragen anders ist als vergiften und vergessen : ein Einblick in unser mentales Lexikon
(2010)
Vorwort
(2010)