Amaury de Souza  Deniz Ozonur 《臭氧:科学与工程》2020,42(1):66-78

ABSTRACT

This paper presents the results of the statistical modeling of the ozone concentration in Campo Grande, Brazil in 2016. Five sets of data, summer (January–March), autumn (April–June), winter (July–September), spring (October–December), and all year round were used. The results show that the maximum concentrations of oxidants occur at 3:00 p.m., the diurnal NO variation, the concentrations show a cycle with two peaks at 7:00 and the other at 11:00 p.m. It has been found that the best distribution for the five datasets is the lognormal distribution of three parameters. The seasonality of the datasets shows greater asymmetry during the summer, due to the greater tail distribution, mainly due to the greater photochemical activity.  相似文献   

    

Rennan F. S. Barbosa  Alana G. Souza  Derval S. Rosa 《Polymer Composites》2020,41(7):2841-2854

Acetylated-cellulose nanostructures (CNS) were used as reinforcing agent to develop poly(butylene adipate-co-terephthalate)—PBAT—nanocomposites with 1, 3, 5, and 10 wt% of modified and nonmodified nanoparticles through solvent casting. This study explains the interactions between the reactive groups CNS and PBAT interact and the influence of this interaction in the mechanical and thermal properties of the composites. The nonmodified CNS showed a noncontinuous increase in the PBAT stiffness, due to the low interaction between the reinforcement and the matrix and low CNS dispersion. The best results were obtained to acetylated CNS due to the intermolecular interactions between the acetyl groups and the polymer chains. Probably the acetyl groups interfered in the atomic vibration relative to the functional groups of the matrix, which is indicative of the interaction and enhancement of the internal cohesion of the components.  相似文献   

    

Elizabeth C. A. Trindade  Regina V. Antônio  Ricardo Brandes  Letícia de Souza  Gabriel Neto  Vanessa M. M. Vargas  Claudimir A. Carminatti  Derce de Oliveira Souza Recouvreux 《应用聚合物科学杂志》2020,137(35):49036

Microbial fuel cells (MFC) are of great interest for new sources of renewable energies from the waste of biomass and debris. This work aimed was to develop an anode electrode of the carbon fiber-embedded of bacterial cellulose/polyaniline (CF/BC/PANI) nanocomposite for MFC applications. For this purpose, carbon fiber was wrapped onto bacterial cellulose (BC) fibers network during the BC synthesis. The CF/BC/PANI was obtained by polyaniline polymerization on the BC nanofibers as a scaffold. To characterize the electrode, scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis analysis were carried out. The electrical conductivity was determined by measuring the resistivity. MFC using the CF/BC/PANI electrode was monitored and the maximum current density generated was 0.009 mA/cm². The results obtained from the CF/BC/PANI demonstrate great potential for the use as an MFC electrode, as well as a microenvironment favorable to a microbial biofilm formation.  相似文献   

    

Mayke Feitosa Progênio  Felipe Antônio Melo da Costa Filho  Diego Lima Crispim  Marcelo José Raiol Souza  Gardenio Diogo Pimentel da Silva  Lindemberg Lima Fernandes 《国际能源研究杂志》2020,44(12):9772-9786

This study proposed an environmental sustainability index (ESI) to aid the identification of suitable areas for the installation of tidal power plants (TPPs) in coastal areas. Geographic Information System (GIS) and multicriteria analysis (MCA) were integrated to construct the proposed method. ESI consisted of a subindex of environmental fragility (EFI) with six components (geology, geomorphology, vegetation, slope, pedology, and land use), selected from the scientific literature. Therefore, the method serves as a guiding tool for coastal regions without existing information on the environmental impacts generated by this type of energy system. A consultation process with experts, the Delphi method, was conducted to assign weights to the components and subcomponents of the proposed ESI method. The study tested the method on a case study at the sector III of the coastal zone of the state of Pará (CZP), Brazil. The simulations considered scenarios with the installation of TPP of different scales. Scores close to 3 were considered less fragile sites in the ESI. The municipalities with the best ESI performance were São Sebastião da Boa Vista for scenarios I (2.7721) and II (2.126), and Soure for scenario III (1.9908). Moreover, ESI analysis revealed that small tidal dams for sector III are more feasible than medium and large dams. The use of GIS integrated with MCA provided a useful tool to analyze different parameters and visualize areas with the greatest environmental potential. There are challenges associated with complexity of MCA, dependency on expert's opinion, and subjectivity of the weighting system. In addition, limited data is available for the region, which hindered us to explore more fragility parameters.  相似文献   

    

Anely Maciel de Melo  Rafaela Cristina Turola Barbi  Weysser Felipe Cândido de Souza  Laís Costa Luna  Hugo Junior Barboza de Souza  Guilherme Leocárdio Lucena  Max Rocha Quirino  Solange de Sousa 《Journal of Food Processing and Preservation》2020,44(10):e14783

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Beatriz Lourdes de Souza  Karina Teixeira Magalhães-Guedes  Paulo Vitor França Lemos  Leonardo Fonseca Maciel  Disney Ribeiro Dias  Janice Izabel Druzian  Rosane Freitas Schwan 《Journal of food science》2020,85(11):3722-3730

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Hugo Junior Barboza de Souza  Diego Alvarenga Botrel  Regiane Victória de Barros Fernandes  Soraia Vilela Borges  Pedro Henrique Campelo Felix  Lívia Cássia Viana  Amanda Maria Teixeira Lago 《Journal of Food Processing and Preservation》2020,44(3):e14365

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Bibiana Silva  Manuel M Souza  Eliana Badiale-Furlong 《Journal of the science of food and agriculture》2020,100(3):1256-1264

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Thayse Cavalcante da Rocha  Leila Moreira de Carvalho  Alida Janine Soares  Daniella Godoy Coutinho  Lary Souza Olegario  Mércia de Sousa Galvão  Mario Estévez  Marta Suely Madruga 《Journal of the science of food and agriculture》2020,100(6):2630-2637

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Ivo Henrique Pinto Andrade;Joselene Conceição Nunes Nascimento;Denilson de Jesus Assis;Rhaissa Coelho Andrade;Geany Peruch Camilloto;Renato Souza Cruz; 《Journal of food process engineering》2024,47(6):e14647

Ultrasonication is an innovative green technology with various applications in the food industry. Notably, patent analysis from a technological perspective is essential for monitoring market trends and identifying the technological stage through life cycle modeling. Thus, this study aimed to conduct an investigation using patent documents on the application of ultrasound in the food sector. The Espacenet® database was used with the keywords “Food Processing,” “Ultrasound,” and “Ultrasonication,” along with the code A23. A total of 140 documents were evaluated, with China being the main applicant country. Fruits and vegetables and bioactive compounds were the key technological sectors. Food preservation and extraction processes emerged as the primary applications. The involvement of ultrasound technology in the food industry is entering the maturity stage, as demonstrated by the function adjusted to the BiDoseResp model. This result implies further technological and market development in the food industry in the coming years.  相似文献