Shaping of Porous CeO Powders into Highly Active Catalyst Carriers.

CeO is attracting more and more attention because of its outstanding performance in heterogeneous catalysis, as an active support and a reaction promoter in reactions of industrial interest. We herein describe a novel and scalable manufacturing process of mm-sized CeO spheres by a combination of extrusion and spheronization of CeO porous powders. In this study, wet paste formulation and fabrication procedures were optimized, and as a result methylcellulose was identified as the best plasticizer for paste extrusion to provide well-defined spherical shapes and smooth surfaces, as well as reproducible batches.

When organophosphorus ruthenium complexes covalently bind to ruthenium nanoparticles to form nanoscale hybrid materials.

A hybrid material made of mononuclear organophosphorus polypyridyl ruthenium complexes covalently bonded to ruthenium nanoparticles has been synthesized via a one-pot organometallic procedure and finely characterized. These results open new avenues to access unique hybrid transition metal nanomaterials.

Results and complications of carotid endarterectomy in a hospital from Madrid, Spain.

Objective: To study the incidence of cerebrovascular (transient ischemic attacks and stroke) and myocardial events (myocardial infarction) as well as early survival related to carotid endarterectomy. Our secondary aim is to establish possible risk factors associated with complications.

Method: Retrospective observational case-control study within a cohort.