This study presents a thorough overview of metal–organic frameworks’ (MOFs) utility as supports for enzyme immobilization. It details a bibliometric analysis of the field from 2014–2023, based on 911 Web of Science articles. Research outlines the functional properties of MOFs, the enzyme groups, and common immobilization techniques. It showcases diverse enzyme-MOF combinations...
Solubility is one of the most important physicochemical properties, because it is related to some industrial processes such as: formulation, preformulation, purification and quantification. The experimental determination of solubility requires rigorous processes that involve a significant amount of resources. In this context, mathematical models allow estimating solubility under...
This study aimed to determine the moisture diffusion coefficients of potatoes by taking into account the shrinkage that occurs during the drying process. In addition, the study also considered the scenario where shrinkage was neglected for comparison purposes. The main objective of this study is to establish the importance of considering shrinking phenomena for proper modeling of...
Much effort has been devoted to replace pollutant, toxic, cancerogenic hydrazine-based propellants. Hydrogen peroxide could secure promising characteristics as well as high density specific impulse. Effective catalysts with high durability are required to commence H2O2 decompositions, and to inherit hypergolic nature with different hydrocarbon fuels. Silver nanoparticles (18 nm...
The challenge of reducing CO $$_2$$ emissions imposes on the countries the inclusion of renewable energies in their electricity matrix. Brazil needs to improve the participation of Wind, Solar, and Biomass in its system once its electricity generation is highly concentrated on hydro sources. Further, renewable, Electricity generation power plants are frequently associated with...
Antimony (Sb) is a toxic and carcinogenic metalloid that can be present in contaminated water generated by mining operations and other industrial activities. Dissimilatory Sb(V) reduction to Sb(III) under anaerobic conditions by prokaryotic microbial communities has been reported; however, the fate of antimony in anaerobic wastewater treatment systems is poorly understood. This...
Continuous effort is dedicated to clinically and computationally discovering potential drugs for the novel coronavirus-2. Computer-Aided Drug Design CADD is the backbone of drug discovery, and shifting to computational approaches has become necessary. Quantitative Structure–Activity Relationship QSAR is a widely used approach in predicting the activity of potential molecules and...
The heterogeneous character of fixed-film reactors may create highly specialized zones with a stratified distribution of microbial groups and varying capabilities to withstand high organic loads in anaerobic digestion (AD) systems. The microbial distribution and methane-producing potential of biomass from different regions (feeding zone and structured bed) of two second-stage...
In-situ zeolites NaY and Na[B]Y were synthesized on microspherical matrices of kaolin to obtain FCC catalysts. An alkaline pretreatment of the matrix was investigated in order to evaluate its effect on matrix properties and crystallization of the in-situ synthetized zeolites. Catalysts were characterized by SEM, TEM, Ar adsorption, XRD and NH3-TPD. It was observed an increase in...
The research and application of leachate in the treatment of leachate in UASB reactors are increasing, but UASB also has problems such as poor resistance to organic load impact and unstable operation. In order to improve the anaerobic performance stability of an up-flow anaerobic sludge bed reactor (UASB) subjected to high organic loading shock, pumice was added to the leachate...
The wide usage of TNT as a main charge for fragmentation shells has been eliminated due to its lower performance and exudation on the fuze thread and relevant safety measures inconvenience. These disadvantages have not become accepted anymore due to the desired safety requirements and the limited efficiency of the TNT, especially when different new explosives are introduced into...
The large amounts of polyurethane foam wastes (PUFWs) produced in the automobiles, buildings, and furniture industries cause many environmental problems. Therefore, the recycling of PUFWs has acquired great interest worldwide. In this study, the PUFWs were converted to new nanocomposite. The chemical modification of PUFWs was conducted through reflux with potassium permanganate...
Herein, we described the synthesis process of highly durable and eco-friendly alkaline anion-exchange polyvinyl alcohol/chitosan (PVA–CS) membranes through a casting solution technique for fuel cell application. The blended membranes were then cross-linked with formaldehyde and glutaraldehyde, or plasticized by glycerol. PVA–CS (98/2) % blend, (7% CS) cross-linked with 25...
Ionic liquids are used in different processes owing to their low vapor pressure, large viscosity range, chemical and thermal stability, and superior conductance even without water. These features make them flexible and tunable, indicating their possible use as substitutes for commonly used compounds in many processes. The objective of this study was to evaluate the properties of...
The synthesis of PCH from natural bentonite produces a porous heterostructure material effective for the adsorption of glyphosate from water. The adsorption process takes place through an interaction between the silanol group of montmorillonite and/or the PCH adsorbent with the functional groups of glyphosate. The glyphosate adsorption isotherms, recorded for all the studied...
Experimental measurements of systems with slow gas transport kinetics are generally considered a relatively easier task when compared to the challenges of measurements of very fast systems. On the other hand, when the transport process goes towards time constants of the order of several hours, not only the measurements, but also the analysis and interpretation of the data offer...
Zn–Ti–Co(Ni) sorbents for H2S removal from model hot coal were prepared and characterized. Effects of cobalt (Co) and nickel (Ni) on the sorbents texture, structure, H2S sorption capacity and regeneration properties were determined. TiO2 formed mixed metal oxides with CoO and NiO in the fresh sorbents, while TiO2 and nanocrystalline sulfides of Zn, Co, Ni were found in sulphided...
This study assessed the potential of enhancing carotenoids and protein accumulation by Desmodesmus subspicatus LC172266 by urea supplementation and cultivation in a novel flat plate air-lift photobioreactor with broth circulation guides. Addition of 0.2 g L−1 urea to BG11 medium significantly increased the cell growth in both flask and photobioreactor cultures. Carotenoid...