This paper aims to contribute to knowledge on start-up cluster development by describing the core resource configurations in the development trajectory of start-up clusters in an emergent country. This research involves two start-up clusters in the Brazilian context. The results provide a framework formed by four stages that indicates the trajectory of start-up cluster development from the basic level, in which the most evident resources are tangible and endogenous, to the more advanced level, which comprises intangible and exogenous resources. In the fourth stage, start-up clusters improve resources, such as quality of life, cultural diversity and political and economic conditions to foster entrepreneurship and innovation.
The effect of organic solutes on the growth of Aeromonas trota and A. hydrophila was evaluated. Proline and glutamic acid were not effective as osmoprotectors, but betaine exerts osmoprotection allowing the growth of both strains in inhibitory concentrations of NaCl. Growth kinetics suggests that the halotolerance difference between the strains is associated with the synthesis of osmolytes rather than betaine uptake.
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