Concorrência e mudança técnica: aportes e limites dos modelos neo-schumpeterianos evolucionários de dinâmica industrial

This paper makes a critical survey of some recent evolutionary economic literature dealing with industrial dynamics. Although the evolutionary models of industrial dynamics has explored the relationships among market structure and the innovation process within an analytical context that emphasize non-linearity, behavioral asymmetries and the existence of selective process in the competitive dynamics of markets, have been capable of offering compatible results with industrial organization stylized facts, a lot of limitations in technical change description pointed out have able to alter in a crucial way the results attained.

Dynamics of gas levels inside packages containing minimally processed Pera orange

The purpose of this study was to evaluate the changes in concentrations of O2 and CO2 inside packages of minimally processed Pera orange. Previously selected oranges that were washed, sanitized, and chilled were peeled using hydrothermal treatment (immersion of fruits in water at 50 °C for 8 minutes). The peeled oranges were then packed in five different plastic packages under passive and active modified atmosphere (5% O2 + 10% CO2 + 85% N2). The fruits were stored at 6 °C and 12 °C. The package headspace gas composition was evaluated for twelve days at 6 °C and nine days at 12 °C. The polypropylene film (32 µm) promoted modified atmosphere similar to that initially injected (5% O2 + 10% CO2 + 85% N2) at 6 °C and 12 °C. With regard to the atmosphere modification system, the injection of a gas mixture anticipated achieving an equilibrium atmosphere inside the packages at 12 °C. At 6 °C, the gas composition inside the packages was kept close to that of the injection, but the equilibrium was not verified.