David Hansen

Aerobic oxidation of aldehydes under ambient conditions using supported gold nanoparticle catalysts

A new, green protocol for producing simple esters by selectively oxidizing an aldehyde dissolved in a primary alcohol has been established, utilising air as the oxidant and supported gold nanoparticles as catalyst. The oxidative esterifications proceed with excellent selectivities at ambient conditions; the reactions can be performed in an open flask and at room temperature. Benzaldehyde is even oxidised at a reasonable rate below −70 °C. Acrolein is oxidised to methyl acrylate in high yield using the same protocol.

Conceptualizing Dynamic Capabilities in Lean Production: What are They and How Do They Develop?

Abstract This article addresses the need for developing long-term learning abilities in Lean production: dynamic capabilities. Despite Lean’s remarkable popularity, implementation efforts often emphasize short-term efficiency over developing dynamic capabilities necessary for long-term success. This article advances the understanding of dynamic capabilities in Lean based on a longitudinal in-depth case study at a manufacturing facility. The article shows that dynamic capabilities develop through the development of an organizational setting for improvement activities, termed the improvement system. The improvement system’s effectiveness is characterized by the coherence between participants, technology, management, and organization, and between the improvement system and the work system.