Abstract: White-rot fungi (WRF) synthesize ligninolytic extracellular oxidative enzymes such as laccase (Lcc), which has been described as one of the most interesting types of redox enzymes that can improve microbial fuel cell (MFC) performance. Therefore, and in order to test that performance, WRF Trametes versicolor MUM 04.100 was immobilized Leia mais…
Abstract: This study investigates the impact of the cooling rates, from 18 to 1.5 °C/s, on the as-cast microstructure of the CMSX-4 Ni-based superalloy, especially on morphological changes in primary γ′ precipitates in the dendrite core and border. Microstructural characterization along the height of directionally solidified samples included the measurement Leia mais…
Abstract: Fatigue behaviour of bcc Nb-48 wt%Ti (Ti-36at%Nb) alloy parts processed by Laser Powder Bed Fusion (L-PBF) using as raw material two different types of powders, spherical powder produced by Plasma Atomization (PA) and irregularly shaped powder produced by Hydride-Dehydride (HDH) process, are compared. Laser power and scanning speed were Leia mais…
Abstract: Electrospun nanofiber scaffolds mimic the structure of the natural extracellular matrix, making them promising for application in tissue engineering. Based on this, the biopolymers poly(ε-caprolactone) (PCL) and gelatin, with good mechanical and biological properties, respectively, were electrospun with acetic acid as the only solvent, without the crosslinking process in Leia mais…
Abstract: Probiotic microorganisms are a promising alternative to antibiotics in preventing and treating bacterial infections. Within the probiotic group, the lactic acid bacteria (LAB)stand out for their health benefits and for being recognized as safe by regulatory agencies. However, these microorganisms are sensitive to various environmental conditions, including the acidic Leia mais…
Abstract: A proposed treatment for malaria is a combination of fosmidomycin and clindamycin. Both compounds inhibit the methylerythritol 4-phosphate (MEP) pathway, the parasitic source of farnesyl and geranylgeranyl pyrophosphate (FPP and GGPP, respectively). Both FPP and GGPP are crucial for the biosynthesis of several essential metabolites such as ubiquinone and Leia mais…
Abstract: Microstructures of a single layer AISI M4 high speed steel deposited on a AISI D2 tool steel substrate using the L-DED process with two levels of global energy density were characterized and compared. A five-axes PRECO-SL 8600 CNC machine was used to deposit the M4 powder feedstock with a Leia mais…
Resumo: A utilização da junção de dois ou mais elementos por meio de processo de soldagem representa parcela significativa dentre as estratégias existentes, quando se pretende realizar a união mecânica de peças metálicas, assegurando continuidade geométrica. Por apresentar vantagens interessantes tais como custo -benefício, rapidez na execução e robustez, costuma Leia mais…
Resumo: Explorando a utilidade da Carta de Smith em telecomunicações e o seu papel na análise de parâmetros de linhas de transmissão e casamento de impedância, este artigo visa fornecer noções gerais para a estimativa de incerteza de seus resultados, levando em consideração o funcionamento básico do VNA – Vector Leia mais…
Abstract: We evaluate the effect of the bus lanes policy in São Paulo between 2010 and 2015. Our focus is the impact of this policy on vehicle speed in other lanes. We use a difference-in-differences model to evaluate the effect of this policy. We find that the average effect of Leia mais…
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