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Morphological and molecular diversity of arbuscular mycorrhizal fungi in revegetated iron-mining site has the same magnitude of adjacent pristine ecosystems

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Journal of Environmental Sciences 2018年第5期30卷 330-343页

作者： Caroline Krug Vieira Matheus Nicoletti Marascalchi Arthur Vinicius Rodrigues Rafael Dutra de Armas Sidney Luiz Stürmer Universidade Regional de Blumenau(FURB) Programa de Pos-Graduacao em Engenharia Ambiental89030-903 BlumenauSCBrazil Universidade Regional de Blumenau(FURB) Departamento de Ciencias Naturais(DCN)89030-903 BlumenauSCBrazil Uniuersidade Regional de Blumenau(FURB) Programaa de Pos-Graduacao em Engenharia Florestal89030-903 BlumenauSCBrazil Centro Universitario-Catolica de Santa Catarina 89203-005 JoinvilleSCBrazil

Arbuscular mycorrhizal fungi（AMF） are important during revegetation of mining sites, but few studies compared AMF community in revegetated sites with pristine adjacent ecosystems. The aim of this study was to assess AMF species richness in a revegetated iron-mining site and adjacent ecosystems and to relate AMF occurrence to soil chemical parameters. Soil samples were collected in dry and rainy seasons in a revegetated iron-mining site（RA） and compared with pristine ecosystems of forest（FL）, canga（NG）,and Cerrado（CE）. AMF species were identified by spore morphology from field and trap cultures and by LSU r DNA sequencing using Illumina. A total of 62 AMF species were recovered, pertaining to 18 genera and nine families of Glomeromycota. The largest number of species and families were detected in RA, and Acaulospora mellea and Glomus sp1 were the most frequent species. Species belonging to Glomeraceae and Acaulosporaceae accounted for 42%–48% of total species richness. Total number of spores and mycorrhizal inoculum potential tended to be higher in the dry than in the rainy season, except in RA. Sequences of uncultured Glomerales were dominant in all sites and seasons and five species were detected exclusively by DNA-based identification. Redundancy analysis evidenced soil p H,organic matter, aluminum, and iron as main factors influencing AMF presence. In conclusion, revegetation of the iron-mining site seems to be effective in maintaining a diverse AMF community and different approaches are complementary to reveal AMF species, despite the larger number of species being identified by traditional identification of field spores.

关键词： Community structure Glomeromycota Illumina LSU rDNA Spore morphology Taxonomic distinctness index

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Growth of Variable Aspect Ratio ZnO Nanorods by Solochemical Processing

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Journal of Materials Science & Technology 2015年第1期31卷 10-15页

作者： Marivone Gusatti Daniel A.R.Souza Nivaldo C.Kuhnen Humberto G.Riella departamento de engenharia Química e engenharia de Alimentos Programa de Pós-Graduacao em Engenharia Química LABMAC Universidade Federal de Santa Catarina (UFSC) Campus UniversitárioCP 476 Florianópolis Santa Catarina 88040-900 Brazil

In this work,variable aspect ratio（length divided by diameter） zinc oxide nanorods were synthesized through a simple solochemical method by reacting a Zn2+precursor with sodium hydroxide at low reaction *** analysis of the X-ray diffraction data indicated that the samples had hexagonal wurtzite structure and nanometric size *** transmission electron microscopy（Tem） images of the products prepared at60 and 80 ℃ exhibited rod-like architecture,showing that the reaction temperature did not affect the ZnO *** average aspect ratio of the ZnO nanorods decreased from 3.4 to 2.4 when the reaction temperature was raised from 60 to 80 ℃.The samples presented a blue shift in the excitonic absorption compared to ZnO bulk that increased alongside with reaction *** addition,this research investigated the results obtained by varying the concentration of zinc chloride *** the same temperature,it could be verified that when the zinc concentration was increased,the diameter of the ZnO nanorods also slightly increased,and much shorter nanorods were achieved,especially in the reactions performed at 50 and 70 ℃.Finally,the growth mechanism of the ZnO nanostructures was proposed based on the results obtained by changing the zinc precursor concentration and reaction temperature.

关键词： Chemical synthesis ZnO nanorods Growth mechanism

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High Resolution Mass Spectrometry Elucidation of Captopril’s Ozonation and Chlorination By-Products

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American Journal of Analytical Chemistry 2017年第4期8卷 264-279页

作者： Frederico Jehar Oliveira Quintao Geraldo Celio Brandao Silvana de Queiroz Silva Sergio Francisco Aquino Robson Jose de Cassia Franco Afonso programa de pos-graduacao em engenharia ambiental(ProAmb) Universidade Federal de Ouro PretoOuro PretoBrazil programa de pos-graduacao em Ciencias Farmaceuticas(CiPharma) Universidade Federal de Ouro PretoOuro PretoBrazil

The article evaluated the degradation of the captopril in aqueous solution after ozonation and chlorination. The process was continuously monitored focusing on the identification, mass spectrometry and elucidation of its by-products by applying direct infusion and high performance liquid chromatography, electrospray ionization high resolution mass spectrometry, in the negative ion mode. The cytotoxicity of its by-products solutions were evaluated with 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. It was observed through that after 30 min of ozonation and chlorination, there was complete oxidation of captopril, i.e., 100% removal efficiency. At these conditions, the rate of mineralization, by total organic carbon, was only 7.63% for ozonation and 6.40% for chlorination, evidencing the formation of degradation by-products. Ten captopril by-products were identified and their respective chemical structures elucidations are proposed. The treated samples and their by-products were nontoxic to HepG2 cells by MTT assay.

关键词： Chlorination Ozonation Captopril High-Resolution Mass Spectrometry Liquid Chromatography Characterization of By-Products MTT Assay

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An Endogenous Feedback and Entropy Analysis in Machine Learning Model for Stock’s Return Forecast

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Intelligent Automation & Soft Computing 2023年第6期36卷 3175-3190页

作者： Edson Vinicius Pontes Bastos Jorge Junio Moreira Antunes Lino Guimaraes Marujo Peter Fernandes Wanke Roberto Ivo da Rocha Lima Filho Instituto Alberto Luiz Coimbra de pos-Graduação e Pesquisa de engenharia-COPPE Universidade Federal do Rio de Janeiro(UFRJ)Rio de Janeiro21941-598Brasil Instituto de pos-graduacao em Administracao-Coppead Universidade Federal do Rio de Janeiro(UFRJ)21941-918Brasil

Stock markets exhibit Brownian movement with random,non-linear,uncertain,evolutionary,non-parametric,nebulous,chaotic characteristics and dynamism with a high degree of *** an algorithm to predict returns for decision-making is a challenging *** addition,the choice of vari-ables that will serve as input to the model represents a non-triviality,since it is possible to observe endogeneity problems between the predictor and the predicted ***,the goal is to analyze the endogenous origin of the stock return prediction model based on technical *** this,we structure a feed-for-ward neural *** evaluate the endogenous feedback between the pre-dicted returns and technical analysis indicators based on the generated *** is possible to predict the *** high accuracy of the model indicates that,during the test period,there is a hit rate close to 76%.Regarding endogeneity,the term of interest and the return are the variables that influence the largest number of *** results will help investors build investment strategies based on this expert system applied to forecasting.

关键词： Forecast endogeneity neural networks differential evolution stochastic optimization

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Identification of Artificial Neural Network Models for Three-Dimensional Simulation of a Vibration-Acoustic Dynamic System

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Open Journal of Acoustics 2013年第1期3卷 14-24页

作者： Robson S.Magalhaes Cristiano H.O.Fontes Luiz A.L.de Almeida Marcelo embirucu programa de pos-graduacao em engenharia Industrial Escola PolitecnicaUniversidade Federal da BahiaSalvadorBrasil

Industrial noise can be successfully mitigated with the combined use of passive and Active Noise Control (ANC) strategies. In a noisy area, a practical solution for noise attenuation may include both the use of baffles and ANC. When the operator is required to stay in movement in a delimited spatial area, conventional ANC is usually not able to adequately cancel the noise over the whole area. New control strategies need to be devised to achieve acceptable spatial coverage. A three-dimensional actuator model is proposed in this paper. Active Noise Control (ANC) usually requires a feedback noise measurement for the proper response of the loop controller. In some situations, especially where the real-time tridimensional positioning of a feedback transducer is unfeasible, the availability of a 3D precise noise level estimator is indispensable. In our previous works [1,2], using a vibrating signal of the primary source of noise as an input reference for spatial noise level prediction proved to be a very good choice. Another interesting aspect observed in those previous works was the need for a variable-structure linear model, which is equivalent to a sort of a nonlinear model, with unknown analytical equivalence until now. To overcome this in this paper we propose a model structure based on an Artificial Neural Network (ANN) as a nonlinear black-box model to capture the dynamic nonlinear behaveior of the investigated process. This can be used in a future closed loop noise cancelling strategy. We devise an ANN architecture and a corresponding training methodology to cope with the problem, and a MISO (Multi-Input Single-Output) model structure is used in the identification of the system dynamics. A metric is established to compare the obtained results with other works elsewhere. The results show that the obtained model is consistent and it adequately describes the main dynamics of the studied phenomenon, showing that the MISO approach using an ANN is appropriate for the si

关键词： Neural Networks Nonlinear Identification Dynamic Models Distributed Parameter Systems Vibrate-Acoustic Systems

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Anaerobic Digestion of Food Waste Using UASB Sludge from a Poultry Slaughterhouse as Inoculum

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Journal of Agricultural Science and Technology(A) 2017年第7期7卷 507-512页

作者： Bruna Patricia de Oliveira Luisa Helena dos Santos Oliveira Gilberto Martins programa de pos graduacao em Energia Universidade Federal do ABC Santo Andre 09210-580 Brazil programa de pos graduacao em Ciencia e Tecnologia ambiental Universidade Federal do ABC Santo Andre 09210-580 Brazil

In 2010, Brazil endorsed a new national policy of solid wastes, which has a very ambitious target to close up all the dumping areas and to manage adequately all the municipal solid waste, disposing in landfills only the refuse of treated municipal solid waste after 2019. Food waste is the largest representative of organic waste produced in Brazilian municipalities, which can produce both fertilizer and biogas through anaerobic digestion （AD） process, reducing in both cases greenhouse gases emissions. AD assays of some samples of restaurant food wastes were performed in batch laboratory, 500 mL reactors for determination of optimized start-up conditions. The tests were conducted in triplicate, using anaerobic sludge from a poultry slaughterhouse wastewater treatment as inoculum to start up the anaerobic biodigestors. The effect of three different substrates to inoculum mixing ratios 10：90 （S1）, 20：80 （S2） and 30：70 （S3） was evaluated. The food waste used as substrate was previously homogenized and submitted to aerobic mechanical mixing for four days before it was fed in the reactors in anaerobic conditions at the mentioned proportions with the inoculum. The reactors were maintained at 35 ℃ and under mechanical mixing at 60 rpm. The methane production was monitored until its stabilization. Results showed that S1 presented the best performance during the initial 12 d, when it totalized 526 NmLCH4/gVSsubstrate.

关键词： Biogas methane food waste inoculum poultry sludge anaerobic biodigestion.

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Interannual Variability of Energy Flux in Atmospheric Instability Conditions at Pantanal of Mato Grosso-Brazil

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Atmospheric and Climate Sciences 2012年第4期2卷 518-524页

作者： Leone Francisco Amorim Curado José de Souza Nogueira Luciana Sanches Marcelo Sacardis Biudes Thiago Rangel Rodrigues programa de Pós-graduacao em Física ambiental-UFMT Brazil

The energy balance partitions in wetlands have gained notoriety due to the dynamics and importance of these areas for regional and local climate. Thus, the study was conducted about seasonal and interannual behavior energy fluxes, as well as the influences of the conditions of atmospheric stability and instability. The results showed highest fluxes happened in instability atmospheric conditions. The fluxes of latent and sensible heat showed seasonal variation, indicating that the water availability in the atmosphere has influence on the site energy partition, but the interannual patterns remained similar during the two years of study.

关键词： Latent Heat Sensible Heat Energy Partition Wetlands

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Remarks on the application of two-dimensional shape factors under severe wear conditions

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Friction 2016年第1期4卷 65-71页

作者： Giuseppe PINTAUde Mario COSEGLIO programa de Pós-Gradua(a)(a)o em engenharia Mec(a)nica e de Materiais UTFPR Curitiba PR Brazil University of Birmingham Birmingham UK

The use of two-dimensional shape parameters to characterize abrasive particles is a potential approach to express their angularity. Nevertheless, in sliding abrasion, especially in pin abrasion testing, these descriptors could not be suitable for characterizing severe wear of engineering materials such as steels and cast irons. This work compares the applicability of two-dimensional shape parameters in describing severe wear of metals in recent pin abrasion tests with cases where they could have been correlated with the wear rates. Considering these aspects, this work puts in evidence the importance of clogging occurrence and the coated paper structure for a carefully application of shape parameters. In addition, it is proposed a possible relation between the shape parameters and one of the components of the abrasion factor.

关键词： wear particle shape sliding abrasion coated papers

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An Inexact Proximal Method with Proximal Distances for Quasimonotone Equilibrium Problems

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Journal of the Operations Research Society of China 2017年第4期5卷 545-561页

作者： Lennin Mallma Ramirez Erik Alex Papa Quiroz P.R.Oliveira Coordenação dos programas de Pós-gaduação em engenharia-programa de engenharia de Sistemas e Computação Federal University of Rio de JaneiroRio of JaneiroBrazil Mayor de San Marcos National University LimaPeru

In this paper,we propose an inexact proximal point method to solve equilibrium problems using proximal distances and the diagonal *** some natural assumptions on the problem and the quasimonotonicity condition on the... 详细信息

关键词： Equilibrium problems Quasimonotonicity Proximal distance Proximal method

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Risk Analysis： A Methodology Applicable to the Building Inspection

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Journal of Civil Engineering and Architecture 2016年第9期10卷 1052-1058页

作者： Mauricio Noya Ana Lucia Torres Seroa da Motta Mariangela Moura Rafael Carvalho de Souza Bruno Barzellay programa de pos-graduacao em engenharia Civil Universidade Federal Fluminense Rio de Janeiro 22211-200 Brazil departamento de engenharia Civil da Universidade Federal do Rio de Janeiro-Campus Macae Rio de Janeiro 22211-200 Brasil

The lack of care related to maintenance management is directly linked to the absence of plans for maintenance of buildings. Because of that, there is a big incidence of building accidents caused by the negligence of managers and the lack of investment. The research has shown that, although building inspection is a consolidated building maintenance tool, managers do not prepare their building maintenance plan, nor use building inspection as a tool, leading the buildings to the premature obsolescence. The research calls attention to the building inspection technique that can be used to evaluate building maintenance and conservation. It is also a tool for analysis and investment planning based on actions to solve failures and anomalies that might come out during the building inspection. Those failures and anomalies are classified according to their degree of risk, determining the technical priorities of the investment adjustment in the maintenance plan. The paper presents a risk analysis methodology which classifies inspect elements in a building, determining the priority order of services to be executed on a scale from minimum risk （1） to imminent risk （5）. The method shows a tool for building inspection, and it serves as a guideline for building maintenance interventions.

关键词： Civil engineering risk analysis building inspection building maintenance.

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