1,721,195 research outputs found
3D Multifunctional Carbon Nanotube Networks
No full textIn the field of nanomaterials research, carbon nanotubes, proved to
possess unique physicochemical properties that have been applied
to improve the performance of existing processes or even design
novel technologies. This paper illustrates that is possible to
assemble carbon nanotubes into macroscopic self-standing
structures with a distinctive isotropic three-dimensional
arrangement. The final properties at the macroscopic scale take
advantage of those of the individual nanoscale components and of
the overall increase of active surface area. In particular, the carbon
nanotubes assemblies possess good electric conductivity, and
outstanding mechanical properties, enabling a much broader range
of applications in energy and environmental areas than the
individual carbon nanotubes. The synthesis method and the
relevant structural characteristics are described, as well as the
relationship between the observed microscopic properties and
some potential applications
A common conserved amino acid motif module shared by bacterial and intercellular adhesins: Bacterial adherence mimicking cell-cell recognition?
No full textNot availabl
HARIA 2: una Metodologia per la Pianificazione e l’Analisi di Emergenze Tecnologiche – Sviluppo di un Modello Matematico per la Simulazione del Piano di Evacuazione
No full textExperimental strategies for studying G protein-coupled receptor homo- and heteromerization with radioligand binding and signal transduction methods.
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
NMR structural investigation of the biotin-avidin complex: A C-13 NMR paramagnetic relaxation study
No full textThe paramagnetic contributions to the spin-lattice relaxation rates of biotin C-13 nuclei, induced by the presence in the water/DMSO solution of the TEMPOL nitroxide, have been analysed in the interaction with avidin. The paramagnetic relaxation data, obtained at different temperatures, indicate that the average solvent/spin-label exposure of biotin carbons is consistent with the conformational features previously observed for the complex in the crystal. The analysis of the paramagnetic perturbation profiles, derived from C-13 spin lattice relaxation measurements, seems to be highly informative of the sterical aspects of interaction processes of large biopolymers with their ligands
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