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Journal of Materials Science & Technology 2022年第3期98卷 123-135页

作者： R.Silva G.S.Vacchi C.L.Kugelmeier I.G.R.santos A.A.Mendes Filho D.C.C.Magalhães C.R.M.Afonso V.L.Sordi C.A.D.Rovere Munir Rachid Corrosion Laboratory Department of Materials EngineeringFederal University of São CarlosRodovia Washington Luis Km 23513565-905 São CarlosSPBrazil Engineering Modeling and Applied Social Sciences Center(CECS)Federal University of ABCAvenida dos Estados 500109210580 Santo AndréSPBrazil federal university of São Carlos Graduate Program in Materials Science and EngineeringBrazil

In this study,the relationship between spinodal decomposition and the formation of Ni-rich clusters and G-phase in the ferrite on hardening and pitting corrosion of two thermally aged duplex stainless steels(DSSs)at 475℃was *** indicate that,for 2205 DSS,pitting corrosion behavior is influenced by the presence and size of G-phase precipitates for longer aging times,but this contribution is masked by the advanced stage of spinodal decomposition in the ferritic *** the other hand,for 2101 DSS,the formation of Cr-richer nitrides impairs pitting corrosion resistance more than spinodal decomposition.

关键词： Duplex stainless steel Spinodal decomposition G-phase precipitation Pitting corrosion Hardening

Vermicompost for Indigo Blue and Congo Red Removal

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Journal of Water Resource and Protection 2021年第6期13卷 419-434页

作者： Joselito Nardy Ribeiro Araceli Veronica F. N. Ribeiro Andre Romero da Silva Madson de Godoi Pereira Jairo Pinto de Oliveira Alveriana Tagarro Tomaz Barbara Vitoria Health Science center Federal University of Espirito Santo Vitoria-ES Brazil federal Institute of espirito santo Vila Velha-ES Brazil federal Institute of espirito santo Aracruz-ES Brazil Department of Exact and Earth Sciences University of Bahia State Salvador-BA Brazil

The data obtained through this work revealed that the vermicompost is a natural adsorbent able to removal two textile dyes from an aqueous medium. The values of maximum adsorption capacity for congo red (23.25 mg/g) and indigo blue (40.39 mg/g) obtained from the Mathematical Langmuir Model reveal it. The conditions of adsorbent mass, stirring time between adsorbent and dyes were optimized. Additionally, the values of Gibbs free energy demonstrate the predominance of physical interaction between both dyes and vermicompost. Through Langmuir constant values, it was possible to identify similar affinities between both dyes and vermicompost. The value of dimensionless constant indicates favorable adsorptions process. Finally, through physicochemical analysis from scanning electron microscopy and Fourier Transform Infra-Red Spectroscopy, the characteristics of vermicompost were verified revealing essential aspects to efficient adsorbent.

关键词： Vermicompost Adsorption Congo Red Indigo Blue

Methods for Breaking Dormancy of Seeds of Tropical Forage Legumes

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American Journal of Plant Sciences 2014年第13期5卷 1831-1835页

作者： Leonardo F.de Morais Joao C.C.Almeida Bruno B.Deminicis Fabio T.de Padua Mirton J.F.Morenz Joao B.R.de Abreu Raphael P.Araujo Delci D.de Nepomuceno Department of Animal Science and Production Federal Rural University of Rio de JaneiroRio de JaneiroBrazil Department of Animal Science and Production Federal University of Espírito SantoVitóriaBrazil federal Institute of Rio de Janeiro-IFRJ Campus Nilo Peçanha-Pinheiral-RJPinheiralBrazil Brazilian Agricultural Research Corporation National Research Center of Dairy CattleJuiz de ForaBrazil Department of Animal Science Federal University of Sao Joao Del ReiSao Joao Del ReiBrazil

The aim of this study was to evaluate methods for breaking dormancy of seeds Neonotonia wightii (perennial soybean), Macrotiloma axilare (archer), Pueraria phaseoloides (tropical kudzu), Calopogonium mucunoides (calopo), which were subjected to the following treatments for physical breaks and physiological dormancy: 1) control;2) scarification with sandpaper;3) immersion in H2SO4 98% for five minutes and subsequent washing in water;4) preheating at 60°C for 150 minutes in an air circulating oven;5) 0.2% KNO3;and 6) gibberellic acid (GA3 0.5%). The results showed that using H2SO4 to break seed dormancy archer and perennial soybean and calopo scarification with sandpaper were the most recommended treatments. Tropical Kudzu presented physiological response to treatments with the use of gibberellic acid and physical treatment using immersion H2SO4. Thus, it is necessary to use techniques to make the breaking dormancy of seeds of legumes, resulting in an increase in the rate of seed germination and rapid deployment of the legume.

关键词： Fabaceae Seed Dormancy and Germination

Analysis about the Behavior and Modeling of pH-Sensitive Hydrogels with Different Ratios of Chitosan and Polyvinylpyrrolidone

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Journal of Materials Science and Chemical Engineering 2019年第8期7卷 64-76页

作者： Daniela Ribeiro Gabriel Yuto Silvia Lenyra Meirelles Campos Titotto center of Engineering Modelling and Applied Social Sciences Federal University of ABC Santo André Brazil

Smart material can be defined as a material that can dock or convert energy between physical domains or as a material that can generate a response, in their characteristics, properties or geometries, when submitted to an external stimulus, for example, to heat, water presence, light, etc. In this paper, the second definition will be approached. Hydrogels are crosslinked materials that can absorb a big amount of water. They generally can be considered as smart materials once they exhibit sensibility to external stimuli like to pH variation, as will be approached in this paper. Thus, chitosan/polyvinylpyrrolidone hydrogels of three different ratios between these two polymers (1:1, 7:3 and 3:7) were synthesized and putted in aqueous solution with different pHs. The pH was adjusted adding drops of NaOH and HCl, slowly. After the collection of results and in order to understand the phenomena in a visual way, models of the molecules were also elaborated using the Avogadro software. Therefore, it was possible to realize that the greater the ratio of chitosan in the hydrogel, the greater its sensitivity to pH. Such characteristic is associated with the amino (-NH2) groups in it structure, which are capable of protonating and deprotonating (depending of the pH), generating charges under the chemical structure of the material, which will expand its volume in order to minimize the repulsion between charges. In addition, it was also noted that the hydrogel expansion is inversely proportional to the pH increase. By practical tests, it was possible to conclude that chitosan/PVP hydrogel with ratio 7:3 is the most interesting once it presented a greater quantity of chitosan in its composition, what implied in more rigidity than the others and greater ease of handling, resulting in more reliable results. This hydrogel also showed higher sensitivity to pH.

关键词： Chitosan Hydrogel Smart Material pH Sensitivity Polyvinylpyrrolidone Modeling

Scientometric Analysis of Research Output from Brazil in Response to the Zika Crisis Using e-Lattes

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Journal of Data and Information Science 2020年第4期5卷 137-146页

作者： Ricardo Barros Sampaio Antônio de Abreu Batista-Jr Bruno santos Ferreira Mauricio LBarreto Jesús PMena-Chalco Regional Board of Brasília Fiocruz Distrito FederalBrazil Department of Informatics federal university of Maranhão São LuísMABrazil Department of Teaching and Learning Studies Laval UniversityQuébecCanada center of Integrated Data and Knowledge about Health(CIDACS) SalvadorBrazil center for Mathematics Computation and CognitionFederal University of ABC Santo AndréSPBrazil

Purpose:This paper aims to test the use of e-Lattes to map the Brazilian scientific output in a recent research health subject:Zika ***/methodology/approach:From a set of Lattes CVs of Zika researchers registered on the Lattes Platform,we used the e-Lattes to map the Brazilian scientific response to the Zika ***:Brazilian science articulated quickly during the public health emergency of international concern(PHEIC)due to the creation of mechanisms to streamline funding of scientific *** limitations:We did not assess any dimension of research quality,including the scientific impact and societal *** implications:e-Lattes can provide useful guidelines for different stakeholders in research groups from Lattes CVs of ***/value:The information included in Lattes CVs permits us to assess science from a broader perspective taking into account not only scientific research production but also the training of human resources and scientific collaboration.

关键词： e-Lattes Zika virus Lattes Platform Brazilian research output Brazilian science

The Concurrence of Hypercholesterolemia and Aging Promotes DNA Damage in Apolipoprotein E-Deficient Mice

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Open Journal of Blood Diseases 2012年第3期2卷 51-55页

作者： Sara P Dalboni Bianca P Campagnaro Clarissa L Tonini Elisardo C Vasquez Silvana S Meyrelles Biotechnology Graduate Program Health Sciences Center Federal University of Espirito Santo Vitoria ES Brazil Biotechnology Graduate Program Health Sciences Center Federal University of Espirito Santo Vitoria ES Brazil Dept. Physiological Sciences Health Sciences Center Federal University of Espirito Santo Vitoria ES Brazil Dept. Physiological Sciences Health Sciences Center Federal University of Espirito Santo Vitoria ES Brazil Emescam College of Health Sciences ES Brazil

Recent evidence shows that increased oxidative stress and aging contribute to DNA damage in various cardiovascular diseases such as lipid disorders and atherosclerosis. In the present study, we used the comet assay to evaluate the influ- ence of aging on DNA damage in whole blood cells from apolipoprotein E-deficient (apoE?/?) mice and compared the results to those found in cells from wild-type C57BL/6 (C57) mice. Using the alkaline comet assay and fluorescent ethidium bromide staining, DNA damage was analyzed in the peripheral whole blood (5 μL) cells that were isolated from either young (8-week-old) and elderly (72-week-old) apoE?/? mice or from age-matched C57 mice. The levels of total plasma cholesterol were approximately 6-fold higher in apoE?/? mice of both ages compared to C57 mice. Elderly apoE?/? mice showed significantly higher levels of DNA damage (19%) compared to elderly C57 mice (8%, p < 0.01) and young apoE?/? mice (10%, p < 0.01). The comet assay in whole blood cells is a suitable technique for the detection of DNA damage in the apoE?/? mouse;it is an easy, rapid, inexpensive and sensitive method. The novelty of this study is that DNA damage occurring in whole blood cells of this murine model requires the concurrence of aging and oxida- tive stress-related hypercholesterolemia.

关键词： DNA Damage Oxidative Stress apoE Knockout Mice Aging Blood Cells

Recycling and Transmutation of Spent Fuel as a Sustainable Option for the Nuclear Energy Development

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Journal of Energy and Power Engineering 2014年第9期8卷 1505-1510页

作者： Jose Rubens Maiorino Joao Manoel Losada Moreira center of Engineering Modeling and Applied Social Sciences Federal University of ABC Santo AndrO 09210-580 Brazil

The objective of this paper is to discuss the option of recycling and transmutation of radioactive waste against once-through fuel cycle based on uranium feed under the perspective of sustainability. A qualitative analysis was carried out to compare the fuel cycles considering different options for burning and recycling transuranic and fission products utilizing accelerator driven systems, fast reactors, and light water reactors. The results show that recycling and transmutation fuel cycles are more attractive than the current once-through fuel cycles from the point of view of sustainability. The main conclusion is that the decision about the construction of deep geological repositories for spent fuel disposal must be reevaluated.

关键词： Recycling transmutation spent fuel sustainability nuclear energy.

Photonic smart bandage for wound healing assessment

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Photonics Research 2021年第3期9卷 272-280页

作者： Arnaldo Leal-Junior Jingjing Guo Rui Min Antonio Jose Fernandes Anselmo Frizera Carlos Marques Telecommunications Laboratory(LABTEL) Graduate Program in Electrical EngineeringFederal University of Espi’rito SantoVitoria-ES 29075-910Brazil School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191China center for Cognition and Neuroergonomics State Key Laboratory of Cognitive Neuroscience and LearningBeijing Normal UniversityZhuhai 519087China Physics Department&I3N Universidade de AveiroCampus Universitario de SantiagoAveiro 3810-193Portugal

Chronic wounds affect around 2% of the world population with an annual multi-billion dollar cost to the healthcare system. This background pushes the development of new therapies and procedures for wound healing and its assessment. Among them, the potential of hydrogen(pH) assessment is an important indicator of the wound healing stage and condition. This paper presents the development of the first optical fiber-embedded smart wound dressing for pH assessment. An intrinsically pH-sensitive optical fiber is fabricated using a polydimethylsiloxane(PDMS) precursor doped with rhodamine B dye. Raman and Fourier transform infrared(FTIR) spectroscopies are performed in order to verify the presence of rhodamine B and PDMS in the fiber samples. Then, the fiber is embedded in gauze fabric and hydrocolloid wound dressing. In addition, such low Young’s modulus of PDMS fiber enables its use as a highly sensitive pressure sensor, where the results show that the fiber-embedded bandage can measure pressures as low as 0.1 kPa with a high linearity in the range of 0 to 0.3 kPa. The smart bandage is subjected to different pH, which resulted in a wavelength shift of 0.67 nm/pH when the absorption peak at 515 nm was analyzed. Furthermore, pH increase leads to linear decrease of the transmitted optical power(R2 of 0.998), with rise and fall times below 20 s and 30 s, respectively. Therefore, the proposed optical fiber-embedded smart bandage enables the simultaneous assessment of pressure and pH on the wound region.

关键词： fiber smart healing

Endothelial Nitric Oxide Synthase Gene Polymorphism and Periodontal Disease

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Open Journal of Blood Diseases 2012年第2期2卷 34-37页

作者： Fernanda Gobbi Amorim Maria Bernadete Depoli Giovana Machado Souza Simoes Bianca Prandi Campagnaro Clarissa Loureiro Tonini Iuri Drumond Louro Jose Airton Arruda Elisardo Corral Vasquez Silvana dos santos Meyrelles Biotechnology Graduate Program Health Sciences CenterFederal University of Espirito SantoVitoriaBrazil Department of Physiological Sciences Health Sciences CenterFederal University of Espirito SantoVitoriaBrazil Intercath-Meridional Hospital CariacicaBrazil.

The endothelial isoform of nitric oxide synthase (eNOS) is responsible for the physiological production of NO in endo-thelial cells and platelets. There is evidence that the G894T polymorphism of the eNOS gene is associated with this enzyme's basal activity and NO production, which could contribute to the pathogenesis of periodontal diseases (PD). Therefore, this study was designed to investigate the role of G894T polymorphism in the eNOS gene as a predisposing factor to periodontal disease. In this study we investigated the association of this polymorphism with PD in an admix-ture population (N = 119) separated into three groups: Healthy control, Moderate and Severe PD, without statistical differences among them for risk factors for PD, such as age, gender and smoking status. We observed that the GG ge-notype was associated with the progression of PD as indicated by an increase in frequency of approximately 18% in the Moderate and 26% in the Severe groups compared to the Healthy control group (p = 0.0302). This finding indicates that patients carrying the GG genotype have a greater chance of developing PD compared with those carrying the T allele, and it reinforces the notion that genetic factors contribute to the development and aggravation of PD.

关键词： eNOS Polymorphism Periodontal Disease

Influence of Management on the Water Quality and Sediment in Tropical Fish Farm

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Journal of Water Resource and Protection 2013年第5期5卷 495-501页

作者： Lúcia H.Sipaúba-Tavares Rodrigo N.Millan Atanásio A.do Amaral Aquaculture center University of Sao Paulo StateJaboticabalBrazil federal Institute of espirito santo—Ifes AlegreBrazil

A seven-month research evaluated the management effect on the water quality and sediment of seven fish ponds. Water and sediment were collected at nine sample sites: seven in the fish ponds;one in inlet water and another in the fish farm’s effluent. The soil samples were analyzed for macro- and micro-nutrients and the water samples were analyzed for physical and chemical parameters. Management and local climate conditions affected nutrient seasonality in the sediment and featured high concentrations of Al, Ca, Cu, K, Mg, C, Na, Zn and OM at the effluent with low pH, ranging between 4.4 and 6.5. Sudden decrease of DO (less than 3 mg/L) during the rainy season, with a 180 mmrainfall, and a TSS increase (approximately 10 mg/L) were reported. Use of organic manure in fish pond V6 caused higher rates of ammonia (over 1 mg/L). Due to the sediment’s acid pH (less than 4.8) and Al at 0.92 mg/L at the effluent, great care was required in the fish farm. Maintenance and procedures management in the fish farm under analysis should be given more attention since high levels of Al, Fe and acid pH and low levels of potassium and phosphorus in the sediment may produce unfavorable conditions in the water column, and may ultimately have an impact on fish.

关键词： Water Quality Fish Ponds Management Sediment