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3. Springfield firefighting

Author

Johanson, Bert D., Johanson, Nancy B., Rodriguez, Fred., and Johanson, Bert D.

Published
2007

14. Dendrimer Templates for Supported Nanoparticle Catalysts.

Author

Lockwood, David J., Zhou, Bing, Han, Scott, Raja, Robert, Somorjai, Gabor A., Lang, Huifang, and Chandler, Bert D.

Abstract

Catalysis has a tremendous impact on the national economy as one-third of material U.S. GNP involves a catalytic process somewhere in the production chain.1 Catalytic technologies are well established throughout the economy, particularly in petroleum refining, emissions and pollution control (including energy production), polymers and plastics, pharmaceuticals and fine chemicals, and basic chemicals.2 The utilization of heterogeneous catalysts in these areas of chemical industry is certain to increase as environmental and economic pressures drive the movement toward clean, selective chemical processes.2 Similarly, developing new catalysts for more efficient, cost-effective processes will be especially important for growing industries involved in the potential development of a hydrogen economy.3,4 [ABSTRACT FROM AUTHOR]

Published
2007
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15. Dendrimer-Encapsulated Bimetallic Nanoparticles: Synthesis, Characterization, and Applications to Homogeneous and Heterogeneous Catalysis.

Author

Gade, Lutz H., Chandler, Bert D., and Gilbertson, John D.

Abstract

We review the preparation, characterization, and properties of dendrimer-templated bimetallic nanoparticles. Polyamidoamine (PAMAM) dendrimers can be used to template and stabilize a wide variety of mono- and bimetallic nanoparticles. Depending on the specific requirements of the metal system, a variety of synthetic methodologies are available for preparing nanoparticles with diameters on the order of 1-3 nm with narrow particle size distributions. The resulting dendrimer-encapsulated nanoparticles, or DENs, have been physically characterized with electron microscopy techniques, as well as UV-visible and X-ray photoelectron spectroscopies. For certain metal systems, the chemical properties of bimetallic DENs include selective extraction from the dendrimer interior into organic solvents. Catalytic properties include homogeneous hydrogenation catalysis; heterogeneous hydrogenation and oxidation catalysis have also been examined. Homogeneous hydrogenation studies indicate that synergism in catalytic activity often occurs when two metals are intimately mixed in nanoparticles. DENs can also be deposited onto a variety of solid substrates and the organic dendrimer template thermally removed. The resulting activated nanoparticles are also active catalysts, and have been further characterized with infrared spectroscopy of adsorbed CO. Relationships between these heterogenized systems and the solution DENs are also discussed. [ABSTRACT FROM AUTHOR]

Published
2006
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16. Ethiek van DNA tot 9/11

Author

Thomas Vervisch, Bert de Reuver, and Johan Braeckman

Subjects
philosophy, filosofie, bic Book Industry Communication::H Humanities::HP Philosophy
Abstract

Are there limits to cultural diversity? Does an animal have rights? Do we overlook the implications of stem cell technology? Do the public media have their own accountability? Does sport go together with gene therapy? Is ' global governance ' an answer on the instability of the world after 9/11? At the beginning of the 21st century, we are faced daily with these and other ethical questions. In our pluralist society, in which divergent views coexist with each other, no one ethical approach can offer us a unique vision. In Ethics - from DNA to 9/11, the authors scrutinize a number of ethical issues and help the readers arrive at their own conclusion. This is a unique title for everyone who wishes to be informed thoroughly and reliably on the way in which ethical questions are handled nowadays. With contributions from Govert den Hartogh, Guido Pennings, Michiel Korthals, Ronald Commers, Paul Cliteur, Amade M'Charek, Frans Jacobs, Hugo van den Enden, Hub Zwart, Peter Derkx, Sigrid Sterx, Rob van Es and Rik Coolsaet., Zijn er grenzen aan culturele diversiteit? Heeft een dier rechten? Overzien we de implicaties van stamceltechnologie? Hebben de publieke media een eigen verantwoordelijkheid? Gaat sport samen met gentherapie? Is 'global governance' een antwoord op de instabiliteit van de wereld na 11 september 2001? Aan het begin van de 21e eeuw worden we dagelijks we geconfronteerd met deze en andere ethische vragen. In onze pluralistische maatschappij, waarin uiteenlopende opvattingen naast en tegenover elkaar bestaan, kan niet langer één ethische benadering de overhand hebben. Ethiek van DNA tot 9/11 biedt ons een handreiking. Op toegankelijke wijze laten de auteurs ons kennismaken met theoretische én toegepaste ethiek. Verschillende opvattingen worden nauwkeurig gewikt en gewogen zonder ons een visie op te dringen. Het boek biedt een praktische kijk op zeer uiteenlopende ethische kwesties en helpt de lezer bij het innemen van een eigen standpunt. Voor iedereen die zich grondig en betrouwbaar wil informeren over de manier waarop vandaag de dag met ethische vraagstukken wordt omgegaan, is dit boek onmisbaar. Met bijdragen van Govert den Hartogh, Guido Pennings, Michiel Korthals, Ronald Commers, Paul Cliteur, Amade M'Charek, Frans Jacobs, Hugo van den Enden, Hub Zwart, Peter Derkx, Sigrid Sterx, Rob van Es en Rik Coolsaet.

Published
2005
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