We describe herein a synthetic strategy for the synthesis of new fluorescent imidazole and phenazine derivatives synthesized from lapachol, a naturally occurring naphthoquinone isolated from Tabebuia species (ipê tree). The photophysical properties and computational details of these compounds have been studied, aiming at gaining a complete understanding of the potential of these derivatives as probes capable of staining mitochondria selectively. Cell imaging experiments proved the capacity of the imidazole derivatives as selective fluorescent mitochondrial imaging probes. These heterocycles present the same staining patterns as MitoTracker Red, corroborating the potential of these compounds as new mitochondria markers permeable to the cell membrane.
Grande parte das atuais soluções adotadas no provimento de qualidade de serviço em redes é fortemente baseada no protocolo MPLS, que permite a associação de serviços de QoS para diferentes classes de tráfego. Apesar dos seus benefícios, tais soluções apresentam altos custos de OPEX e CAPEX. Redes Definidas por Resíduos (RDN) surgem na perspectiva de viabilizar soluções de baixo custo para o encaminhamento de pacotes baseado simplesmente em operações de resto da divisão (i.e., resíduo). Este trabalho apresenta um modelo para o aprovisionamento de QoS por rótulos programáveis para RDNs. O modelo foi implementado através da linguagem P4. Testes de emulação foram realizados avaliando métricas de QoS e QoE, demonstrando a viabilidade do modelo, mas principalmente ganho na programabilidade de garantias de QoS ajustadas sob demanda.
The cover picture shows a synthetic strategy based on the redox center modification of naturally occurring naphthoquinones for the synthesis of new fluorescent imidazole and phenazine derivatives. Cell imaging experiments proved the capacity of imidazole derivatives as selective fluorescent mitochondrial imaging probes. These heterocycles present the same staining patterns as MitoTracker red, corroborating the potential of these compounds as new mitochondria markers permeable to the cell membrane. The strategy employed is efficient and innovative, enabling the preparation of cellular probes in a single synthetic step. Details are discussed in the Full Paper by E. N. da Silva Júnior et al. on page 3763 ff (https://doi.org/10.1002/ejoc.201700227).
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