Gov de São Paulo, sem espaçamento

junho 2024

Thermoactivated cement from construction and demolition waste for pavement base stabilization: a case study in Brazil

Abstract: Construction and demolition waste (CDW) worldwide generation accounts 10billion tonnes yearly. The major fraction is landfilled requiring innovative recycling methods to reduce the associated environmental impacts and to increase its circularity. Our study demonstrated the feasibility of using different CDW fines to develop recycled cements and optimized the content Leia mais…

Por Maria Solange, atrás

High activity pozzolan obtained from selection of excavation soils in a construction and demolition waste landfil

Abstract: Excavations soils from construction sites, when included as Construction and Demolition Waste (CDW) can double waste amount and represent up to 80 % of waste composition. Limited recycling strategies are available for the material. In this work, soils with higher kaolinite contents were selected by X-ray diffraction (XRD) to Leia mais…

Por Maria Solange, atrás

In situ trametes versicolor laccase biocathode performance assessment in dual-chamber microbial fuel cells

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…

Por Maria Solange, atrás

Effect of the cooling rate on the microstructure of directionally solidified casting (CMSX-4 Ni superalloy)

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…

Por Maria Solange, atrás

Fatigue behaviour of additive manufactured Nb-48Ti alloy parts from powders produced by plasma atomazation (PA) and hydride-dehydride (HDH) process

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…

Por Maria Solange, atrás

Influence of tickness on the properties of electrospun PCL/gelatina nanofiber scaffolds

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…

Por Maria Solange, atrás

Symbiotic microparticles produced through spray-drying-induced in situ alginate crosslinking for the preservation Pediococcus pentosaceus viability

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…

Por Maria Solange, atrás

Beyond the MEP pathway: a novel kinase required for prenol utilization by malária parasites

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…

Por Maria Solange, atrás

Aplicações do escaneamento óptico em uniões soldadas

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…

Por Maria Solange, atrás
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