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Assessment of the Integrity and Retention of Chromium (VI) in Portland Cement Pastes

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Advances in Chemical Engineering and Science 2021年第1期11卷 1-17页

作者： Ferreira Raul Tadeu Lobato Fortaleza Dário batista Amorim Kelly Aparecida da Encarnação Lira Fernanda silva silva Marizete Helena Pereira Wagner batista Santos Institute of Exact Sciences and Earth Federal University of Mato Grosso Barra do Gar&#231as/MT Brazil

Chromium is a heavy metal used for various applications such as in the manufacture of stainless steels, in chemicals for wood treatment, in tanneries, and in the refractory industry. The main problem associated with the use of chromium in these activities is the considerable volume of contaminated effluent that requires treatment, mainly due to its high mobility and toxicity in its hexavalent form. Immobilization methods arise as an efficient solution for the treatment of these wastes through converting them into inert and stable materials. The present paper aims to investigate Portland cement II’s paste properties with potassium dichromate addition in order to verify the chromium immobilization process. Analyses of moisture content, water absorption, axial compressive strength, and solubilization were done in samples at 7 and 28 days with 0%;0.5%;1.05;1.5%;2.0% and 2.5% potassium dichromate addition. The results showed the influence of this salt in cement hydration reactions, damaging the mechanical behavior and the water absorption capability of the material produced. In the solubilization test, all compositions had >99% efficiency of chromium immobilization in both ages of hydration, thus demonstrating the capability of a cementitious matrix to stabilize this metal.

关键词： Wastes Solidification-Stabilization Chromium Solubilization

Prevalence of congenital cytomegalovirus infection in preterm,small for gestational age and low birth weight newborns:characteristics and cytokines profile

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World Journal of Pediatrics 2022年第7期18卷 498-504页

作者： Janaina Fortes Lino Llian Martins Oliveira Diniz Debora Marques de Miranda daniela Valadao Freitas Rosa Nathalia Gualberto Souza e silva Eduardo de Souza Nicolau Larissa Goncalves Rezende Lais silva Carvalho Marianna Fischer de Paula Lopes Luisa Petri Correa Gabriela Mafra de Oliveira Flavia Miranda da silva Alves Lorena batista Pascoal Erika Lima Dolabella Teixeira da Costal Leni Marcia Anchieta Roberta Maia de Castro Romaneli Odete Valadares Maternity Hospital Belo HorizonteBrazil Pediatrics Department.Faculy of Medice of Federal University of Minas Gerais Belo Horizonte.Brazil Molecular Laboratory of the INCT-MM.Faculy of Medicine.Federal University of Minas Gerais-UFMG.Belo Horizonte Brazil Faculty of Medicine.Federal University of Minas Gerais-UFMG Belo Horizonte.Brazil Risoleta Tolentino.Neves University Hospital's Maternity Belo HorizonteBrazil Sofia Feldman Maternity Hospital Belo HorizonteBrazil Hospital das Clinicas Maternity-Federal University of Minas Gerais.Belo Horizonte Brazil Pediatrics Department of Federal University of Minas Gerais School Medicine.Minas Gerais.Av Professor Alfredo Balena 190.Belo Horizonte 30130-100Brazil

Cytomegalovirus is the most frequent agent of congenital viral infections,affecting approximately 0.2%-2.4%of live births in different countries[1-7].Universal screening for congenital cytomegalovirus infection in newborns is not a standard practice considering cost-benefit issues and viabil-ity of diagnostic ***,most newborns are asympto-matic and there is no effective treatment for this population[2-5].

关键词： weight birth characteristics

Blackberry jam fruit(Randia formosa(Jacq.)***):An Amazon superfruit with in vitro neuroprotective properties

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Food Bioscience 2022年第6期50卷 944-953页

作者： Giovanna Nascimento de Mello e silva Edson Silvio batista Rodrigues Isaac Yves Lopes de Macêdo Henric Pietro Vicente Gil Hericles Mesquita Campos Paulo César Ghedini Lidya Cardozo da silva Erica Aparecida batista Giovanna Lopes de Araújo Boniek Gontijo Vaz Tânia Aparecida Pinto de Castro Ferreira Renê Oliveira do Couto Eric de Souza Gil LAFAM – Laboratory for Pharmaceutical and Environmental Analysis Faculdade de FarmáciaUniversidade Federal de GoiásGoiâniaGoiásBrazil DFar – Pharmacology Department Instituto de Ciências BiológicasUniversidade Federal de GoiásGoiâniaGoiásBrazil LaCEM – Laboratory of Chromatography and Mass Spectometry Instituto de QuímicaUniversidade Federal de GoiásGoiâniaGoiásBrazil LANAL – Laboratory of Nutrition and Food Analysis Faculdade de NutriçãoUniversidade Federal de GoiásGoiâniaGoiásBrazil Universidade Federal de São João del-Rei (UFSJ) Campus Centro-Oeste Dona Lindu (CCO)DivinópolisMinas GeraisBrazil

We report on the bromatological profile,the preliminary phytochemical composition,the antioxidant capacity,and the in vitro neuroprotective effects of Blackberry Jam *** were the major macronutrients(20 g/100 g)in both pulp and seeds(36.5 g/100g),that also possess a low lipid content(0.1 g/100 g and 0.7 g/100,and 86 Kcal/100 g,respectively).Eleven compounds including a diterpenoid dimmer,a lactone,coumarins,sphingosines,and flavonoids have been identified for the first time in the pulp and seeds of *** by mass *** electrochemical index of the hydroalcoholic extract of the pulp(BJFp respectively)and an appreciable energy value(89 Kcal/100 g)was around 6.8μA/V and two reversible cathode peaks were observed up to 0.5 V,thus shedding light to its antioxidant capacity,which was also evidenced by the DPPH•and ABTS+radical scavenging assays(IC50 of 3.30±0.23μg/mL and 18.17±1.21μg/mL,respectively).The BJFp protected against oxidative stress in vitro by significantly decreasing both the lipid peroxidation and contents of carbonyl proteins in a dose-dependent manner in murine brain cells treated with ***,the BJFp increased the superoxide dismutase(EC50 of 11.99±0.35μg/mL)and catalase(EC50 of 69.53±0.43μg/mL)*** BJFp markedly decreased both the in vitro acetylcholinesterase(IC50 of 227.9±0.34μg/mL)and butyrylcholinesterase(IC50 of 8.77±0.40μg/mL)***,besides being a great source of energy,this Amazon superfruit may be promising for enhancing the treatment outcomes of ailments related to oxidative stress,which require further in vivo investigation.

关键词： Antioxidants Cholinesterase inhibitors Electrochemistry Functional foods Phenolic compounds

Object-based image analysis supported by data mining to discriminate large areas of soybean

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International Journal of Digital Earth 2019年第3期12卷 270-292页

作者： Carlos antonio da silva Junior Marcos Rafael Nanni José Francisco de Oliveira-Júnior Everson Cezar Paulo Eduardo Teodoro Rafael Coll Delgado Luciano Shozo Shiratsuchi Muhammad Shakir Marcelo Luiz Chicati Geotechnology Applied in Agriculture and Forest(GAAF) State University of Mato Grosso(UNEMAT)Alta FlorestaMato GrossoBrazil Department of Agronomy(daG/PGA) State University of Maringá(UEM)MaringáParanáBrazil Institute of Atmospheric Sciences(ICAT) Federal University of Alagoas(UFAL)MaceióAlagoasBrazil Federal University of Mato Grosso do Sul(UFMS) Chapadão do SulMato Grosso do SulBrazil Department of Environmental Sciences(DCA) Forestry Institute(IF)Federal Rural University of Rio de Janeiro(UFRRJ)SeropédicaRio de JaneiroBrazil AgCenter Louisiana State University(LSU)Baton RougeLAUSA Institute of Space Technology Islamabad Pakistan IslamabadPakistan

This research aimed to analyze the possibility to estimate and automatically map large areas of soybean cultivation through the use of MODIS(Moderate-Resolution Imaging Spectroradiometer)*** major techniques were used:GEOgraphic-Object-Based Image Analysis(GEOBIA)and data Mining(DM).In order to obtain the images,the segmentation algorithm implemented by Definiens Developer was used.A decision tree(DT)was created from a training set previously ***-series of images from the MODIS sensor aboard the Terra satellite were acquired in order to represent the wide variation of the vegetation pattern along the soybean crop *** time-series data were used only for the CEI ***,to compare the results obtained from GEOBIA,the slicing technique was used at the CEI *** the training,the DT was applied to the vegetation indices generating the thematic map of the spatial distribution of *** accordance with the error matrix and kappa parameter analysis,tests for statistical significance were *** indicate that the classification achieved by Kappa coefficients is *** short,the obtained results proved that combining vegetation indices and time-series data using GEOBIA return promising results for mapping soybean plantation on a regional scale.

关键词： GEOBIA time-series vegetation indices MODIS vegetation dynamics

Assessment of hybrid geoids in Chile and Spain,combining GGM and GNSS/Leveling observations

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Geodesy and Geodynamics 2021年第2期12卷 65-92页

作者： Jose antonio Tarrio Mosquera Marcelo Caverlotti silva Fernando Isla Carlos Prado University of Santiago of Chile(USACH) Faculty of EngineeringGeographical Engineering DepartmentChile Geographic Military Institute Chile

This research presents the results for analyses done to five geopotential global models(GGM),comparing them with ground data from GNSS and leveling in heterogenic zones from the geodetic perspective,in Chile and *** the official and complete implementation of the International Height Reference Frame(IHRF)has not yet been established,the vertical geodetic system of many countries is not calculated on a global scale;instead,it is calculated by the variation of relative heights between one or more local tide gauges,such as in the case of Spain and *** aspect creates regional and specific altimetry data,which disables the use of GGM to directly obtain the orthometric height of the vertical reference system(VRS)from the GNSS *** models currently reach centimetric precision due to their high resolution but are directly incompatible for a local *** solve this,we expose in this article the contrast between geometric geoidal undulation(ellipsoidal heights and orthometric data from the leveling networks in Spain and Chile)with the geoidal undulation in more recent models and higher resolution:Earth Gravitational Model 2008(EGM08),European Improved Gravity model of the Earth by New techniques(EIGEN6 C4),Gravity Observation Combination(GOCO05 C),Experimental Gravity Field Model(XGM2016),and Ultra-High Resolution Global Geopotential Model(SGG-UGM),adjusting the residual between both referential heights by different parametric models and polynomials of determined *** evaluated,their geoidal undulations are combined with GNSS/leveling data from the corresponding VRS to generate a correcting surface,which is also known as a hybrid geoid,resulting in a model of optimal adjustment for the combination of five parameters of the EIGEN-6 C4 with orthometric heights and ellipsoids of both Chile and *** results show 2-3 cm precisions,which were statistically analyzed to determine the suitability for *** final products are three grids of indep

关键词： GNSS levelling Correcting surface IHRS SIRGAS EIGEN-6C4

Prevalence of Giardia duodenalis among dogs seized by the Center for Control of Zoonoses (CCZ) of the city of Lages, Santa Catarina, Brazil

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Health 2013年第1期5卷 119-124页

作者： Rosileia Marinho Quadros Paulo Henrique Exterckotter Weiss Geison Willian Ezequiel Renato batista Tamanho Geanice Lepo Marcio Rodrigues da silva Carlos Roberto Joao da silva Junior Flavio antonio Pacheco de Araujo Luiz Claudio Miletti Universidade do Estado de Santa Catarina LagesBrazil

The knowledge of the epidemiology of parasitic infections in stray and domestic animals, especially of its incidence and prevalence, is fundamental to adopting effective prophylactic measures. Stray dogs play an important role in environmental contamination favoring the transmission cycle of zoonotic agents. Among the parasitic infections that affect humans, Giardia duodenalis is the most common intestinal protozoa and was designated as a re-emerging infectious disease. This study aimed to determine the prevalence of G. duodenalis in dogs siezed by the Center for Control of Zoonoses (CCZ) of the city of Lages, Santa Catarina, Brazil using two diagnostic techniques. In 357 stool samples analysed, the prevalence of G. duodenalis cysts was 5.3% (19/357) and 4.8% (17/357) detected by floatation and sedimentation techniques, respecttively. No correspondence between gender and age was found among the methods used for analyzing the infected dogs in this study. Our data suggested that two diagnostic techniques should be used in a complementary way to ensure that false negatives are not neglected.

关键词： Giardia Duodenalis Dogs Zoonoses Brazil

Evaluation of limnological dynamics in Nile tilapia farming tank

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Aquaculture and Fisheries 2021年第5期6卷 485-494页

作者： antonio Cesar Godoy Lucas Ulisses Rovigatti Chiavelli Jarred Hugh Oxford Rômulo batista Rodrigues Igor de Oliveira Ferreira Arypes Scuteri Marcondes Claucia Aparecida Honorato silva dacley Neu Universidade Estadual de Maringá Av.Colombo5790Centro de Ciências ExatasDepartamento de QuímicaMaringáPRBrazil University of Georgia Poultry Science DepartmentAthensGAUSA alves 7712Porto AlegreRSBrazil Universidade Federal da Grande Dourados Faculdade de Ciências AgráriasRodovia Dourados-Itahumkm 12Cidade UniversitáriaDouradosMSBrazil

For fish farming,water is the limiting factor for good *** characteristics determine the health and the productivity of the fish and can indicate possible problems arising in the *** present study aimed to verify the nictemeral and vertical dynamics of limnological characteristics in a tilapia farming tank coated with geomembrane and with low water *** were carried out in a 24 hour on period of 18 days with an interval of three hours between the water *** order to determine the vertical dynamics,water samples were taken at three depths(5,35,and 70 cm)in the central region of the *** was found that the parameters analyzed showed changes in the *** oxygen and pH changed sharply in the 24-hour period(p$<0.05$),with values of 3.86 mg L$^{-1}$at 6:00 AM and 18.39 mg L$^{-1}$at 3:00 PM;and 8.0 at 06:00 AM and 9.65 mg L$^{-1}$at 6:00 PM,*** respect to the three layers of the tank,the difference between the values of dissolved oxygen in the epilimnion and the metalimnion(above 14 mg L$^{-1}$)is clear,while in the hypolimnion the concentration of this oxygen was 7.57 mg L$^{-1}$(p$<0.05$).Nitrite and phosphorus had similar behavior,with more pronounced values in *** is a strong correlation between temperature and depth of the tank($r=-0.85,~p=5.86\times 10^{-9}$),depth and dissolved oxygen($r=-0.77,p=9.97\times 10^{-6}$),temperature and ammonia($r=-0.82,~p=6.33\times 10^{-8}$),depth and ammonia($r=0.79,~p=4.79\times 10^{-7}$),and nitrite and dissolved oxygen($r=-0.72,~p=2.15\times 10^{-4}$).The principal component analysis showed that there was a separation between the strata epilimnion,metalimnion,and *** response surface analysis showed the interaction between depth,temperature and the variables dissolved oxygen,ammonia,and *** result of this study helps to illustrate the dynamics of a tilapia tank covered with geomembrane and low water renewal ove

关键词： Water quality Fish ponds Nictemeral Principal component analysis Response surface

Quantum hydrodynamics of a single particle

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Light(Science & Applications) 2020年第1期9卷 1199-1205页

作者： daniel Gustavo Suarez-Forero Vincenzo Ardizzone Saimon Filipe Covre da silva Marcus Reindl antonio Fieramosca Laura Polimeno Milena De Giorgi Lorenzo Dominici Loren N.Pfeiffer Giuseppe Gigli dario Ballarini Fabrice Laussy Armando Rastelli daniele Sanvitto CNR NANOTEC Institute of NanotechnologyCampus EcotekneVia Monteroni73100 LecceItaly Dipartimento di Ingegneria dell’Innovazione Universita del SalentoCampus Ecoteknevia Monteroni73100 LecceItaly Institute of Semiconductor and Solid State Physics Johannes Kepler UniversityAltenbergerstr.69Linz 4040Austria Dipartimento di Matematica e Fisica E.De Giorgi Universita del SalentoCampus Ecoteknevia MonteroniLecce 73100Italy PRISM Princeton Institute for the Science and Technology of MaterialsPrinceton UniversityPrincetonNJ 08540USA Faculty of Science and Engineering University of WolverhamptonWulfruna StreetWolverhampton WV11LYUK Russian Quantum Center Novaya 100143025 SkolkovoMoscow RegionRussia

Semiconductor devices are strong competitors in the race for the development of quantum computational *** this work,we interface two semiconductor building blocks of different dimensionalities with complementary properties:(1)a quantum dot hosting a single exciton and acting as a nearly ideal single-photon emitter and(2)a quantum well in a 2D microcavity sustaining polaritons,which are known for their strong interactions and unique hydrodynamic properties,including ultrafast real-time monitoring of their propagation and phase *** the present experiment,we can thus observe how the injected single particles propagate and evolve inside the microcavity,giving rise to hydrodynamic features typical of macroscopic systems despite their genuine intrinsic quantum *** the presence of a structural defect,we observe the celebrated quantum interference of a single particle that produces fringes reminiscent of wave *** this behavior could be theoretically expected,our imaging of such an interference pattern,together with a measurement of antibunching,constitutes the first demonstration of spatial mapping of the self-interference of a single quantum particle impinging on an obstacle.

关键词： quantum particle hydrodynamic

Rotational Oscillation Effect on Flow Characteristics of a Circular Cylinder at Low Reynolds Number

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World Journal of Mechanics 2015年第10期5卷 195-209页

作者： Alice Rosa da silva Aristeu da Silveira-Neto antonio Marcos Goncalves de Lima School of Civil Engineering Federal University of UberlandiaUberlandiaBrazil School of Mechanical Engineering Federal University of UberlandiaBrazil

Two dimensional numerical simulations of flow around a rotationally oscillating circular cylinder were performed at Re = 1000. A wide range of forcing frequencies, fr, and three values of oscillation amplitudes, A, are considered. Different vortex shedding modes are observed for a fixed A at several values of fr, as well as for a fixed fr at different values of A. The 2C mode of vortex shedding was obtained in the present study. It is important to point out that this mode has not been observed by other investigators for rotationally oscillating case. Also, it is verified that this mechanism has great influence on the drag coefficient for high frequency values. Furthermore, the lift and pressure coefficients and the power spectra density are also analyzed.

关键词： Rotationally Oscillating Cylinder Vortex Shedding Modes Drag Coefficient