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Showing papers by "Universidade Federal de Minas Gerais published in 2022"


Journal ArticleDOI
TL;DR: A systematic literature review of metamodeling-based simulation optimization (MBSO) suggests that this research area is growing in the past 15 years.

49 citations


Journal ArticleDOI
TL;DR: In this article , an experimental study on the comparison between alkali-activated materials (also recognized as geopolymers) and a traditional cementitious matrix (Portland cement) incorporated with rubber particles, deriving from end-of-life tires, as replacement of raw mineral aggregates was performed.

36 citations


Journal ArticleDOI
TL;DR: The use of metamodeling techniques in optimization via simulation problems has grown considerably in recent years to promote more robust and agile decision-making, determining the best scenario in the solution space as mentioned in this paper .

31 citations


Journal ArticleDOI
23 Apr 2022-Polymers
TL;DR: A review of microencapsulation strategies and available technologies for extracting essential oils from aromatic plant matter is presented in this article , along with an in-depth overview of the current research and application of micro-encapsulated EOs.
Abstract: Essential oils (EOs) are complex mixtures of volatile compounds extracted from different parts of plants by different methods. There is a large diversity of these natural substances with varying properties that lead to their common use in several areas. The agrochemical, pharmaceutical, medical, food, and textile industry, as well as cosmetic and hygiene applications are some of the areas where EOs are widely included. To overcome the limitation of EOs being highly volatile and reactive, microencapsulation has become one of the preferred methods to retain and control these compounds. This review explores the techniques for extracting essential oils from aromatic plant matter. Microencapsulation strategies and the available technologies are also reviewed, along with an in-depth overview of the current research and application of microencapsulated EOs.

25 citations


Journal ArticleDOI
TL;DR: However, in contrast to what was seen in other countries, the rapid spread of Delta did not lead to a large increase in the number of cases and deaths reported in Brazil as discussed by the authors .
Abstract: The coronavirus disease 2019 (COVID-19) epidemic in Brazil was driven mainly by the spread of Gamma (P.1), a locally emerged variant of concern (VOC) that was first detected in early January 2021. This variant was estimated to be responsible for more than 96 per cent of cases reported between January and June 2021, being associated with increased transmissibility and disease severity, a reduction in neutralization antibodies and effectiveness of treatments or vaccines, and diagnostic detection failure. Here we show that, following several importations predominantly from the USA, the Delta variant rapidly replaced Gamma after July 2021. However, in contrast to what was seen in other countries, the rapid spread of Delta did not lead to a large increase in the number of cases and deaths reported in Brazil. We suggest that this was likely due to the relatively successful early vaccination campaign coupled with natural immunity acquired following prior infection with Gamma. Our data reinforce reports of the increased transmissibility of the Delta variant and, considering the increasing concern due to the recently identified Omicron variant, argues for the necessity to strengthen genomic monitoring on a national level to quickly detect the emergence and spread of other VOCs that might threaten global health.

22 citations


Journal ArticleDOI
TL;DR: In this paper , the authors provide a comprehensive numerical insight into the earthquake response and seismic vulnerability of historical fortified masonry palaces with corner towers using nonlinear dynamic analyses and a macro-modeling FE-based approach, which is able to take into account the complex interactions between different macro-elements and the characteristics of the seismic action.

21 citations


Journal ArticleDOI
TL;DR: In this article, a microfiltration polyethersulfone membranes were modified with polyvinyl alcohol (PVA) and graphene oxide (GO) by layer-by-layer self-assembly method and subsequently used for sunset yellow (SY) dye removal.
Abstract: The wide use of dyes has been arousing global concern due to the amount of wastewater improperly discharged into water resources, damaging the environment and human health. In this study, microfiltration polyethersulfone membranes were modified with polyvinyl alcohol (PVA) and graphene oxide (GO) by layer-by-layer self-assembly method and subsequently used for sunset yellow (SY) dye removal. Different masses of PVA (0, 30 and 60 g) and GO (0.5, 1 and 1.5 g) were deposited on the membrane surface, in which the MF/PVA60+GO1+PVA30 achieved the best performance among all modifications, with removal greater than 99.90%, ∼80% flux recovery rate and good regeneration ability (>94% removal after 5 reuse cycles). Moreover, BSA filtration confirmed its antifouling properties. In order to simulate a real wastewater, the SY dye filtration in the presence of dissolved salts was investigated, wherein a satisfactory removal rate (86.17%) was found for MF/PVA60+GO1+PVA30. Filtration tests were also performed with tartrazine yellow and amaranth dyes, which removal outcomes (>99%) confirm the versatility and efficiency of this membrane. The characterization by physical-chemical and spectroscopic techniques indicated that the membrane was successfully modified. Therefore, the proposed modification demonstrated a significant improvement in dyes removal, which allows its application for wastewater treatment purposes.

20 citations


Journal ArticleDOI
01 Jan 2022
TL;DR: In this article , a microfiltration polyethersulfone membranes were modified with polyvinyl alcohol (PVA) and graphene oxide (GO) by layer-by-layer self-assembly method and subsequently used for sunset yellow (SY) dye removal.
Abstract: The wide use of dyes has been arousing global concern due to the amount of wastewater improperly discharged into water resources, damaging the environment and human health. In this study, microfiltration polyethersulfone membranes were modified with polyvinyl alcohol (PVA) and graphene oxide (GO) by layer-by-layer self-assembly method and subsequently used for sunset yellow (SY) dye removal. Different masses of PVA (0, 30 and 60 g) and GO (0.5, 1 and 1.5 g) were deposited on the membrane surface, in which the MF/PVA60+GO1+PVA30 achieved the best performance among all modifications, with removal greater than 99.90%, ∼80% flux recovery rate and good regeneration ability (>94% removal after 5 reuse cycles). Moreover, BSA filtration confirmed its antifouling properties. In order to simulate a real wastewater, the SY dye filtration in the presence of dissolved salts was investigated, wherein a satisfactory removal rate (86.17%) was found for MF/PVA60+GO1+PVA30. Filtration tests were also performed with tartrazine yellow and amaranth dyes, which removal outcomes (>99%) confirm the versatility and efficiency of this membrane. The characterization by physical-chemical and spectroscopic techniques indicated that the membrane was successfully modified. Therefore, the proposed modification demonstrated a significant improvement in dyes removal, which allows its application for wastewater treatment purposes.

20 citations


Journal ArticleDOI
TL;DR: The metaheuristics "In the Large" project as discussed by the authors aims to support the development, analysis, and comparison of new approaches in optimization research by providing extensible algorithm templates that support reuse without modification, white box problem descriptions that provide generic support for the injection of domain specific knowledge, and remotely accessible frameworks, components and problems.

20 citations


Journal ArticleDOI
TL;DR: Cloud point extraction and aqueous two-phase systems are alternatives to the use of traditional organic solvents as discussed by the authors, in terms of efficiency, toxicity, and biodegradability of the components forming the systems.

18 citations


Journal ArticleDOI
TL;DR: In this article , a new adsorbent material was synthesized through the combination of babassu coconut activated carbon and graphene oxide (GAC-GO), which was evaluated in batch adsorption processes, aiming at the treatment of water contaminated with CQN and DIP.

Journal ArticleDOI
01 May 2022-Energy
TL;DR: In this article , three time series approximations and their combinations considering two analyses were studied. And the results indicated that the regression with seasonality has the best approaches, and the combination of the time series methods helps to reduce the error of the approximate methods.

Journal ArticleDOI
15 Feb 2022-Fuel
TL;DR: In this paper, a modified Hummers method was used to oxidize and exfoliate expanded graphite and aminated graphene oxide (GOA-EDA) in an ultrasonic bath.

Journal ArticleDOI
TL;DR: In this article, the impact of the nanocomposite fillers loading on the membrane efficiency, the different polymeric materials of the membranes used, the fouling reduction mechanisms and the applications of the modified membranes are addressed.

Journal ArticleDOI
TL;DR: In this article, a review summarizes the discoveries of candidate antigens for R. microplus tick vaccines as well as the methods used to test their efficacy, and more research is needed to develop safe and efficient tick vaccines, such as the evaluation of the efficacy of Antigens against other tick species to verify cross-reactivity and inclusion of additional antigenens to promote the blocking of the infection and spreading of tickborne diseases.

Journal ArticleDOI
TL;DR: In this paper, a 30,000 metric tonne capacity was developed, and the process was feasible with a return on investment (ROI) of 30.7% for the first time.

Journal ArticleDOI
TL;DR: Evaluating the performance of a solar thermal microalgal biomass pre-treatment prior to the anaerobic co-digestion with raw sewage showed a positive energy balance, as the total energy produced was twice the energy consumed in the system.

Journal ArticleDOI
TL;DR: In this article , a quasi-experimental study using time series analysis was conducted to assess immediate impacts and changes to the trend in national congenital syphilis before and after the Syphilis No! Project (SNP), from September 2016 to December 2019.

Journal ArticleDOI
TL;DR: Real-time hardware-in-the-loop results show the feasibility of the proposed self-adaptive grid-forming converter that uses the triple-loop control and a central controller with a synchrocheck relay at the microgrid point-of-common-coupling.

Journal ArticleDOI
TL;DR: In this article , the authors found that angiotensin-(1-7) [Ang-(1)-7] is a heptapeptide of the renin-angioensin system that acts through Mas receptor (MasR), which has recently emerged as a novel proresolving mediator.
Abstract: Nonphlogistic migration of macrophages contributes to the clearance of pathogens and apoptotic cells, a critical step for the resolution of inflammation and return to homeostasis. Angiotensin-(1-7) [Ang-(1-7)] is a heptapeptide of the renin-angiotensin system that acts through Mas receptor (MasR). Ang-(1-7) has recently emerged as a novel proresolving mediator, yet Ang-(1-7) resolution mechanisms are not fully determined. Herein, Ang-(1-7) stimulated migration of human and murine monocytes/macrophages in a MasR-, CCR2-, and MEK/ERK1/2-dependent manner. Pleural injection of Ang-(1-7) promoted nonphlogistic mononuclear cell influx alongside increased levels of CCL2, IL-10, and macrophage polarization toward a regulatory phenotype. Ang-(1-7) induction of CCL2 and mononuclear cell migration was also dependent on MasR and MEK/ERK. Of note, MasR was upregulated during the resolution phase of inflammation, and its pharmacological inhibition or genetic deficiency impaired mononuclear cell recruitment during self-resolving models of LPS pleurisy and E. coli peritonitis. Inhibition/absence of MasR was associated with reduced CCL2 levels, impaired phagocytosis of bacteria, efferocytosis, and delayed resolution of inflammation. In summary, we have uncovered a potentially novel proresolving feature of Ang-(1-7), namely the recruitment of mononuclear cells favoring efferocytosis, phagocytosis, and resolution of inflammation. Mechanistically, cell migration was dependent on MasR, CCR2, and the MEK/ERK pathway.

Journal ArticleDOI
TL;DR: In this paper, the electronic and geometrical factors of the strong metal-support interaction (SMSI) effect in Pd/TiO2 nanoparticles were determined using NAP-XPS, ULPS, and Density Functional Theory (DFT) calculations.


Journal ArticleDOI
TL;DR: In this article, spectrofluorimetry combined with multiway chemometric tools were applied to discriminate pure Aroeira honey samples from samples adulterated with corn syrup, sugar cane molasses and polyfloral honey.

Journal ArticleDOI
TL;DR: In this paper, the authors evaluated the biodegradation of 18 environmentally hazardous pharmaceutically active compounds (PhACs) by wastewater treatment technologies due to the risk that these compounds pose to the environment.

Journal ArticleDOI
TL;DR: In this paper, the authors used 10,035 available Pseudomonas genomes, including 210 type strains, to build a genomic distance network to estimate the number of species through community identification.


Journal ArticleDOI
TL;DR: In this article, a hierarchical network-oriented characterization of the users engaged in misinformation spread by focusing on three perspectives: individuals, WhatsApp groups and user communities, i.e., groupings of users who, intentionally or not, share the same content disproportionately often.
Abstract: WhatsApp emerged as a major communication platform in many countries in the recent years. Despite offering only one-to-one and small group conversations, WhatsApp has been shown to enable the formation of a rich underlying network, crossing the boundaries of existing groups, and with structural properties that favor information dissemination at large. Indeed, WhatsApp has reportedly been used as a forum of misinformation campaigns with significant social, political and economic consequences in several countries. In this article, we aim at complementing recent studies on misinformation spread on WhatsApp, mostly focused on content properties and propagation dynamics, by looking into the network that connects users sharing the same piece of content. Specifically, we present a hierarchical network-oriented characterization of the users engaged in misinformation spread by focusing on three perspectives: individuals, WhatsApp groups and user communities, i.e., groupings of users who, intentionally or not, share the same content disproportionately often. By analyzing sharing and network topological properties, our study offers valuable insights into how WhatsApp users leverage the underlying network connecting different groups to gain large reach in the spread of misinformation in the platform.

Journal ArticleDOI
01 Jan 2022-Cytokine
TL;DR: In this article, the effect of exercise training on inflammatory biomarkers in patients with breast cancer was systematically summarized using predefined keywords, and they found significant reduction in CRP level following exercise training, which was more considerable after concurrent aerobic and resistance training and in long-term intervention.

Journal ArticleDOI
TL;DR: The porcine placenta is a key organ responsible for the exchange of nutrients, metabolites and respiratory gases between mother and fetuses as discussed by the authors, and placentation begins with implantation, which involves specialized cell adhesion and cell migration.

Journal ArticleDOI
TL;DR: In this article , a mixed-integer linear programming model is proposed to solve small instances optimally and two heuristics are proposed to contribute to the solution of the two problems in an integrated way.