Abstract: There is a demand for new microorganisms with the potential to degrade recalcitrant petroleum compounds, such as polycyclic aromatic hydrocarbons (PAHs). The objective of this research was to evaluate the potential of the AM15 strain isolated from water samples from the effluent dike of the Urucu petroleum Province, to Leia mais…
Abstract: DNA is an intelligent data storage medium due to its stability and high density. It has been used by nature for over 3.5 billion years. Compared with traditional methods, DNA offers better compression and physical density. DNA can retain information for thousands of years. However, challenges exist in scalability, Leia mais…
Abstract: Mixed oxides of Mo-V-W-Cu were prepared by three different synthesis methods, namely, evaporation (EV), hydrothermal treatment (TH), and evaporation, followed by hydrothermal treatment (EV-TH). The catalyst samples were characterized by X-ray diffraction (XRD) and fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), and N2 adsorption/desorption techniques. Subsequently, their catalytic performance Leia mais…
Abstract: The present treatment of water from aqueous solutions, reported from our research work, uses polyurea (PU) as a novel adsorbent. Specifically, the adsorption efficacy of PU was tested in dyes with different characteristics (Congo red (CR) and methylene blue (MB)). The PU membrane was obtained by a sol-gel chemistry Leia mais…
Abstract: Carbon fiber-reinforced polymers (CFRP) are extensively applied in the automotive and aeronautic industry due to several advantages that combine resistance properties with the weight reduction of components. The fiber reinforced thermoset composites are generally manufactured in components close to the final dimensions, and, therefore, need to be machined to Leia mais…
Resumo: Em telecomunicações, cabos, conectores e adaptadores desempenham um papel crucial para o funcionamento eficiente das redes, inclusive em tecnologias sem fio como o 5G. A escolha e o uso adequado do tipo de conexão também são vitais para a integridade dos dispositivos e para a garantia da qualidade do Leia mais…
Abstract: This paper presents the effects of Niobium additions (1, 2 and 3%) on the wear resistance and impact properties of Hadfield steels (1.2%C and 12-18%Mn). The additions of Nb promoted a significant decrease in the mass losses, from 79 mg (Hadfield steel with 12%Mn) to 33 mg (Hadfield steel Leia mais…
Abstract: This article examines the impact of the air-fuel ratio, measured by lambda probe, and the ignition timing on the indicated efficiency of an internal combustion engine using biogas as fuel. Through analysis, it’s seen that the indicated efficiency increases as the air-fuel ratio leans towards a stoichiometric value, and Leia mais…
Abstract: This article examines the effects of charge, engine speed, ignition timing, and air-fuel ratio on the temperature of exhaust gases when using biogas as fuel. The effects of varying engine operating conditions on exhaust gas temperature are analyzed. The article discusses whether increasing engine charge and engine speed leads Leia mais…
Abstract: This article investigates the effects of intake manifold pressure and engine speed on the volumetric efficiency of an internal combustion engine. The study also examines the impact of biogas and different temperatures on volumetric efficiency. Through analysis, it’s verified if the volumetric efficiency of the engine decreases when using Leia mais…
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