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Mostrando ítems 31-40 de 145
Artículo
Ag+ release and corrosion behavior of zirconium carbonitride coatings with silver nanoparticles for biomedical devices
(ScienceDirect, 2013-05-15)
Zirconium carbonitride coatings with silver nanoparticles were produced by DC unbalanced dual magnetron sputtering system, using two targets, Zr and Zr/Ag in an Ar, C2H2 and N2 atmosphere. Stainless steel 316L and silicon ...
Artículo
Compact composition operators on the Dirichlet space and capacity of sets of contact points
(Elsevier, 2013-02-15)
We prove several results about composition operators on the Dirichlet space D⁎. For every compact set K⊆∂D of logarithmic capacity , there exists a Schur function φ both in the disk algebra A(D) and in D⁎ such that the ...
Artículo
On the Optimality of Conservation Results for Local Reflection in Arithmetic
(Association for Symbolic Logic, 2013)
Let T be a recursively enumerable theory extending Elementary Arithmetic EA. L. D. Beklemishev proved that the Σ2 local reflection principle for T, (T), is conservative over the Σ1 local reflection principle, (T), with ...
Artículo
Inhibition of the Mitotic Exit Network in Response to Damaged Telomeres
(Public Library of Science, 2013)
When chromosomal DNA is damaged, progression through the cell cycle is halted to provide the cells with time to repair the genetic material before it is distributed between the mother and daughter cells. In Saccharomyces ...
Artículo
Polar Marine Biology Science in Portugal and Spain: Recent Advances and Future Perspectives
(Elsevier, 2013)
Polar marine ecosystems have global ecological and economic importance because of their unique biodiversity and their major role in climate processes and commercial fisheries, among others. Portugal and Spain have been ...
Artículo
Confianza y desconfianza en redes sociales: Detección de trolls
(Asociación de Técnicos de Informática (ATI), 2013)
Uno de los aspectos más importantes en la empresa 2.0 es la gestión de la reputación on line. En este trabajo, nos enfrentamos a los comportamientos deshonestos que se pueden llevar a cabo en la web 2.0 para alterar la ...
Artículo
Elongation factor 2-diphthamide is critical for translation of two IRES-dependent protein targets, XIAP and FGF2, under oxidative stress conditions
(Elsevier, 2013)
Elongation factor-2 (eEF2) catalyzes the movement of the ribosome along the mRNA. A single histidine residue in eEF2 (H715) is modified to form diphthamide. A role for eEF2 in cellular stress responses is highlighted by ...
Artículo
Synthesis and Characterization of New Carbohydrate-based Polyureas
(Tech Science Press, 2013-07)
A batch of linear [m,n]-type sugar-based polyureas was synthesized by polyaddition reaction in solution from hexamethylene diisocyanate or 4,4’-methylene-bis(phenyl isocyanate) with the acyclic 2,3,4-tri-O-methyl-1,5- ...
Artículo
Relating the Freiheitssatz to the asymptotic behavior of a group
(European Mathematical Society, 2013)
We are concerned with the implications of the Freiheitssatz property for certain group presentations in terms of proper homotopy invariants of the underlying group, by describing its fundamental pro-group. A finitely ...
Artículo
Supervised classification and mathematical optimization
(Elsevier, 2013-01)
Data Mining techniques often ask for the resolution of optimization problems. Supervised Classification, and, in particular, Support Vector Machines, can be seen as a paradigmatic instance. In this paper, some links between ...