186,827 research outputs found
Exposé de la situation financière de la Société
No full textMermod . Exposé de la situation financière de la Société. In: Annales de la Société botanique de Lyon, tome 5, 1876-1877. 1878. p. 41
Situation financière de la Société
No full textMermod . Situation financière de la Société. In: Annales de la Société botanique de Lyon, tome 6, Compte-rendu des séances – 1877-1878. 1879. p. 92
Nuclear factor I genomic binding associates with chromatin boundaries
No full textBACKGROUND: The Nuclear Factor I (NFI) family of DNA binding proteins (also called CCAAT box transcription factors or CTF) is involved in both DNA replication and gene expression regulation. Using chromatin immuno-precipitation and high throughput sequencing (ChIP-Seq), we performed a genome-wide mapping of NFI DNA binding sites in primary mouse embryonic fibroblasts. RESULTS: We found that in vivo and in vitro NFI DNA binding specificities are indistinguishable, as in vivo ChIP-Seq NFI binding sites matched predictions based on previously established position weight matrix models of its in vitro binding specificity. Combining ChIP-Seq with mRNA profiling data, we found that NFI preferentially associates with highly expressed genes that it up-regulates, while binding sites were under-represented at expressed but unregulated genes. Genomic binding also correlated with markers of transcribed genes such as histone modifications H3K4me3 and H3K36me3, even outside of annotated transcribed loci, implying NFI in the control of the deposition of these modifications. Positional correlation between + and - strand ChIP-Seq tags revealed that, in contrast to other transcription factors, NFI associates with a nucleosomal length of cleavage-resistant DNA, suggesting an interaction with positioned nucleosomes. In addition, NFI binding prominently occurred at boundaries displaying discontinuities in histone modifications specific of expressed and silent chromatin, such as loci submitted to parental allele-specific imprinted expression. CONCLUSIONS: Our data thus suggest that NFI nucleosomal interaction may contribute to the partitioning of distinct chromatin domains and to epigenetic gene expression regulation. NFI ChIP-Seq and input control DNA data were deposited at Gene Expression Omnibus (GEO) repository under accession number GSE15844. Gene expression microarray data for mouse embryonic fibroblasts are on GEO accession number GSE15871
First record of the Red Sea immigrant Chrysallida fischeri (Hornung and Mermod, 1925) (Gastropoda: Pyramidellidae) from Greek waters
No full textThe Red Sea mollusc Chrysallida fischeri (Hornung and Mermod, 1925) was collected in 2005 off Makri, Rhodes, Greece. This is the first record of the species in the Aegean Sea. The presence of both live specimens and shells suggest that C. fischeri is well established in the area. © 2007 The Author(s)
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Debrot, S., Fivaz, G., Mermod, C. et Weber, J.M. — Atlas des poils de mammifères d'Europe. Neuchâtel, Institut de Zoologie de l’Université (22, chemin de Chantemerle, CH 2000 Neuchâtel), 1982
No full textBourlière François. Debrot, S., Fivaz, G., Mermod, C. et Weber, J.M. — Atlas des poils de mammifères d'Europe. Neuchâtel, Institut de Zoologie de l’Université (22, chemin de Chantemerle, CH 2000 Neuchâtel), 1982. In: Revue d'Écologie (La Terre et La Vie), tome 37, n°1, 1983. p. 136
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