The antimicrobial activity of Syzygium cumini leaves extract, known as "jambolão", was evaluated. The crude hydroalcoholic extract was active against Candida krusei (inhibition zone of 14.7 ± 0.3 mm and MIC = 70 µg/ mL), and against multi-resistant strains of Pseudomonas aeruginosa, Klebsiella pneumoniae and Staphylococcus aureus.
The loss of nitrogen through volatilization leads research to the search for new technologies that release nutrients in a manner synchronized with the crop demand, minimizing losses and increasing efficiency of its use in agriculture, as is the case with the stabilized slow-release nitrogen fertilizer. This work sought to evaluate the losses of volatilized N-NH 3 in stabilized slow-release nitrogen fertilizer applied to the soil. The treatments followed a 5 × 3 × 2 factorial as follows: five nitrogen fertilizer sources (conventional urea -CU; urea combined with zeolite -UZ; sulfur coated urea -US; NBPT coated urea -U NBPT , and urea combined with organic material -OU); three application times; and two managements (surface and incorporated applications) with three replications. The experiment was conducted using a collection chamber to capture NH 3 for 25 days, with samples taken at 2, 4, 7, 9,
Esse trabalho discute, em perspectiva histórica, a cooperação técnica estabelecida entre a Organização Pan-Americana da Saúde (Opas/OMS) e o governo brasileiro no domínio das políticas e programas de desenvolvimento de recursos humanos em saúde, a partir de meados da década de 1970. Considerando os organismos
As ferramentas de virtualização têm um papel fundamental no crescimento da utilização da Computação em Nuvem. Por meio da virtualização, é possível realizar a migração de máquinas virtuais dentro de um provedor de serviços de nuvem, proporcionando a utilização eficiente dos recursos. Entretanto, não oram evidenciadas quais técnicas são mais indicadas de acordo com os cenários distintos de carga no qual o sistema está operando. Diferentemente das avaliações de desempenhos simplesmente comparativas encontradas na literatura, este trabalho propõe a utilização de um modelo estatístico consistente para avaliação de desempenho das técnicas de migração: (i) live migration e (ii) non-live migration. O objetivo do modelo estatístico é identificar o comportamento das técnicas de migração de máquinas virtuais sob diferentes situações de cargas de trabalho. O modelo estatístico proposto para utilização é composto pela abordagem de avaliação de desempenho das técnicas de migração de máquina virtual combinado com o planejamento de experimentos de projeto fatorial 2k.Palavras-chave: Migração. Máquinas Virtuais. Avaliação de Desempenho. AbstractPerformance evaluation of virtual machine migration approaches on cloud computign environment Virtualization tools play a key role in increasing the use of Cloud Computing. Through virtualization, it is possible to migrate virtual machines within a cloud service provider, providing efficient resource utilization. However, there are not evident which techniques work better in according to the different load scenarios in which the system is operating. This work proposes the use of a consistent statistical model to evaluate the performance of migration techniques:(i) live migration and (ii) non-live migration. The objective of the statistical model is to identify the behavior of virtual machine migration techniques under different workload situations. The proposed statistical model for use is based on the performance evaluation approach of the virtual machine migration techniques combined with the 2k factorial design.Keywords: Migration. Performance Evaluation. Virtual Machine.
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