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Historical evolution of the Trophic and Limnological Relationships in the Itaipu Reservoir:Top-down and Bottom-Up effects upon Fish Production

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Advances in Bioscience and Biotechnology 2015年第6期6卷 390-407页

作者： Rinaldo Antonio Ribeiro Filho Miguel Petrere Junior Angelo Antonio Agostinho Simone Friderigi Benassi Julia Myriam de Almeida Pereira edson Kiyoshi Okada Curso de engenharia de Pesca Universidade Estadual Paulista(Unesp)RegistroBrazil Programa de Pos Graduacao em Diversidade Bilogica e Conservacao Universidade Federal de Sao Carlos(UFSCar)SorocabaBrazil Programa de Pos Graduacao em Sustentabilidade em ecossistemas Marinhos e Costeiros UNISANTASantosBrazil departamento de Biologia Nucleo de Pesquisas em LimnologiaIctiologia e AquiculturaUniversidade Estadual de MaringaParanaBrazil Divisao de Reservatorio(MARR.CD) Itaipu BinacionalFoz do IguaçuBrazil

Many experimental studies have contributed to the development of the theory of trophic chains in lacustrine habitats. They have revealed the important role played by fish, a subject that has been mostly ignored by limnological studies for the past few decades. Most of these studies were developed in europe and in the United States. The general applicability of this theory has not yet been tested in subtropical and tropical habitats. In spite of controversies, the bottom-up: top-down trophic cascade hypotheses are the most adopted conceptual models. In this context, we examined if these hypotheses may be corroborated by data from the subtropical Itaipu Reservoir. A negative effect was verified between water transparency and total suspended solids. The detritivorous fish exerted a controlling effect on chlorophyll-a concentrations. Bottom-up effects were detected in four trophic levels, and top-down was detected in just one trophic level. The limnological variates influenced the chlorophyll-a concentration, which indicated that the lnTKN plus the effect of the quarter and the reservoir zone (and their interaction) were important.

关键词： Reservoir Trophic Cascade Top-down Bottom-Up Limnology Biotic Community

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Morphological and electrochemical Characterization of Ti/MxTiySnzO2 (M = Ir or Ru) electrodes Prepared by the Polymeric Precursor Method

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Advances in Chemical engineering and Science 2016年第4期6卷 364-378页

作者： Jussara F. Carneiro Jéssica R. Silva Robson S. Rocha Josimar Ribeiro Marcos R. V. Lanza Instituto de Química de Sao Carlos USP-Universidade de Sao Paulo Sao Carlos SP Brazil departamento de Química UFES-Universidade Federal do Espírito Santo Vitória ES Brazil escola de engenharia de Sao Carlos USP-Universidade de Sao Paulo Sao Carlos SP Brazil

This paper describes the effect of the composition of the oxide films on the properties of electrodes Ti/MxTiySnzO2 (M = Ir or Ru) prepared by the polymeric precursor method. XRD studies showed that the anodes are formed by solid solutions. The electrodes containing IrO2 exhibit lower activity for the oxygen evolution reaction. The doping of the electrode surface with SnO2 improves the catalytic properties of the anodes. However, it should be held in appropriate compositions, because the change in the atomic ratio of this element shows a marked effect on the stability of the oxides. electrode Ti/Ir0.2Ti0.3Sn0.5O2 has lower lifetime, i.e. 6 hours. The 20% decrease in the stoichiometric amount of SnO2 increases the time to a value above 70 hours, as observed for Ti/Ir0.3Ti0.4Sn0.3O2. electrode Ti/Ru0.3Ti0.4Sn0.3O2 shows lifetime of 11 hours;therefore IrO2 is more stable than RuO2 under the conditions investigated. These results suggest that electrode Ti/Ir0.3Ti0.4Sn0.3O2 is promising for different applications, such as water electrolysis, capacitors and organic electrosynthesis.

关键词： Dimensionally Stable Anodes (DSA) Oxide Films electrochemical Properties Polymeric Precursor Method

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Additional Records of the American elephantfish <i>Callorhinchus callorynchus</i>(Chondrichthyes, Holocephali, Chimaeriformes) in Southeastern Brazil

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Natural Resources 2020年第10期11卷 439-445页

作者： Salvatore Siciliano Ana Rita O. Palmeira-Nunes Getulio Rincon Jorge Luiz Silva Nunes Sérgio C. Moreira Márcio L. V. Barbosa-Filho Laboratório de Biodiversidade Instituto Oswaldo Cruz/Fiocruz Rio de Janeiro RJ Brazil Grupo de estudos de Mamíferos Marinhos da Regiã o dos Lagos (GeMM-Lagos) Araruama RJ Brazil Universidade Federal do Maranhã o (UFMA) Laboratório de Organismos Aquáticos Departamento de Oceanografia e Limnologia S&#227 o Luís MA Brazil Universidade Federal do Maranhã o (UFMA) Curso de Engenharia de Pesca Pinheiro MA Brazil Setor de Mamíferos Departamento de Vertebrados Museu Nacional/UFRJ Rio de Janeiro RJ Brazil departamento de Ciências Biológicas Programa de Pós-gradua&#231 o em etnobiologia e Conservaç o da Natureza Universidade Federal Rural de Pernambuco (UFRuPE) Campus Dois Irm&#227 os Recife PE Brazil

Chimaeras, fish in the order Chimaeriformes, are among the rarest and least studied fish in the class Chondrichthyes (cartilaginous fish). Previous records have indicated that a species of chimaera known as the elephantfish, or cockfish, Callorhinchus callorynchus, may be found in marine waters off southeastern Brazil, as far north as the state of São Paulo. Here we report that C. callorynchus, caught with bottom gillnet, was found in an urban fish market in the city of Rio de Janeiro (~23˚S). This and other records from a variety of places call into question the distribution limits of the American elephantfish in the southwestern Atlantic Ocean and whether, at least seasonally, this species may often be found as far north as the state of Rio de Janeiro. Because of scientific and conservation interests in the poorly known Chimaeriformes, we recommend long-term monitoring of the fish catch in ports along the southern Brazilian coast, to better understand the natural history of the intriguing chimeras.

关键词： Callorhinchus Callorynchus American elephantfish Holocephali Chimaera Bycatch Southwest Atlantic Ocean

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Mean and Interannual Variability of Maize and Soybean in Brazil under Global Warming Conditions

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American Journal of Climate Change 2013年第4期2卷 237-253页

作者： Flávio Justino evandro Chaves Oliveira Rafael de Avila Rodrigues Paulo Henrique Lopes Goncalves Paulo Jorge Oliveira Ponte Souza Frode Stordal José Marengo Thieres G.da Silva Rafael Coll delgado douglas da Silva Lindemann Luiz Claudio Costa departamento de engenharia Agrícola Universidade Federal de ViçosaVicosaBrazil Universidade Federal Rural da Amazônia Instituto Sócio-Ambiental e dos Recursos HídricosBelémBrazil department of Geosciences University of OsloOsloNorway Instituto Nacional de Pesquisas espaciais Cachoeira PaulistaBrazil Universidade Federal Rural de Pernambuco Unidade Academica de Serra TalhadaSerra TalhadaBrazil Universidade Federal Rural do Rio de Janeiro Instituto de Florestas/Departamento de Ciencias AmbientaisSeropédicaBrazil

Brazil is responsible for 27% of the world production of soybeans and 7% of maize. Mato Grosso and Para states in Brazil are among the largest producer. The viability to the cultivation of maize (Zea mays) and soybeans (Glycine max), for future climate scenarios (2070-2100, GHG) is evaluated based on crop modeling (DSSAT) forced by observational data and regional climate simulations (HadRM3). The results demonstrated that a substantial reduction in the yield in particular for maize may be expected for the end of the 21st century. Distinct results are found for soybeans. By applying the A2 climate changes scenario, soybean yield rises by up top 60% assuming optimum soil treatment and no water stress. However, by analyzing the inter-annual variability of crop yields for both maize and soybean, could be demonstrated larger year-to-year fluctuations under greenhouse warming conditions as compared to current conditions, leading to very low productivity by the end of the 21st century. Therefore, these Brazilian states do not appear to be economically suitable for a future cultivation of maize and soybeans. Improved adaptation measures and soil management may however partially alleviate the negative climate change effect.

关键词： Climate Changes Soybeans Maize

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High Levels Production of Recombinant Human Activin A—effect upon <i>in Vivo</i>Follicle Stimulation

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Advances in Bioscience and Biotechnology 2015年第2期6卷 96-104页

作者： Nélia Ferreira de Souza Meire Coelho de Almeida Geralda Walkiria de Araujo Raquel Mariana de Melo Leite Ivan Carlos dos Santos Mercia de Paula Lima Jorge Luiz Pesquero Universidade de Mogi das Cruzes Mogi das Cruzes Brazil Faculdade Pitágoras Belo Horizonte Brazil departamento de Fisiologia e Biofísica Instituto de Ciências Biológicas Universidade Federal de Minas Gerais Belo Horizonte Brazil departamento de engenharia de Biossistemas Universidade Federal de S&atildeo Jo&atildeo del Rei S&atildeo Jo&atildeo del Rei Brazil departamento de enfermagem Básica Escola de Enfermagem Universidade Federal de Minas Gerais Belo Horizonte Brazil

Activin plays an important role in numerous physiological processes such as cell differentiation and remodeling, regeneration and repair of tissues from various organs, angiogenesis, morphogenesis of glandular organs, pluripotency and differentiation of stem cells, cell adhesion and apoptosis. It participates in reproductive processes like embryogenesis, in the expression of Follicle Stimulating Hormone and Luteinizing Hormone and maturation of ovarian follicles and therefore has application in the area of reproduction of vertebrates. Given the economic importance of activin, we develop an efficient and economical method for the production of recombinant human activin A (rACT), using as expression system the yeast Pichia pastoris. rACT showed biological activity as it induced, on submicromolar dose, the increase of ovarian mass and the ovulation process in a mammal model.

关键词： Recombinant Human Activin Yeast Superovulation

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Volatilomic fingerprinting from edible *** some impact compounds behind its attractiveness

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Food Bioscience 2022年第6期50卷 1988-1999页

作者： Sergio Izcara Rosa Perestrelo Sonia Morante-Zarcero Isabel Sierra JoséS.Câmara departamento de Tecnología Química y Ambiental E.S.C.E.TUniversidad Rey Juan CarlosC/ Tulipán s/n28933MóstolesMadridSpain CQM – Centro de Química da Madeira Universidade da MadeiraCampus da Penteada9020-105FunchalPortugal departamento de Química Faculdade de Ciências Exatas e EngenhariaUniversidade da MadeiraCampus da Penteada9020-105FunchalPortugal

In recent years edible flowers emerged in gourmet cuisine,giving any dish the beauty of attractive colours,freshness,texture,and aromatic ***,they also constitute a potential source of phytochemical compounds associated with beneficial effects on human *** this work,the volatilomic fingerprinting of 4 different species of edible flowers[blue mallow(Malva sylvestris L.),pomegranate flower(Punica granatum L.),hibiscus(Hibiscus rosa-sinensis L.),and nasturtium(Tropaeolum majus L.)]used in gourmet dishes,was established,and comparatively *** volatile metabolites were extracted by solid-phase microextraction in headspace mode and identified by gas chromatography-mass spectrometry to understand the chemistry behind its attractiveness better.A total of 78 volatile metabolites,belonging to diverse chemical groups were *** mallow is mainly characterised by sesquiterpenoids(61.5%of the total volatile fraction),whereas in flowers from pomegranate,hibiscus,and nasturtium,terpenoids(56.6%),carbonyl compounds(88.0%)and organosulfur compounds(98.0%)are the dominant chemical groups,*** blue mallow flowers,τ-muurolene and valencene are the dominant volatiles,followed byα-cubebene andδ-*** flowers are rich in furfural and linalool,while the aldehydes 2-hexenal,hexanal and 2-octenal are dominant volatile metabolites in *** isothiocyanate,a potent antimicrobial agent,accounts for 98%of the total volatile fraction of nasturtium *** addition to flavour notes,some of the identified volatile metabolites present bioactive properties,which could be explored for application in the food,pharmaceutical and cosmetic *** volatile metabolites profiles combined with unsupervised principal component analysis facilitated the differentiation of the edible flowers under investigation,revealing the most related volatile metabolites of each sample,which can be used as markers for the authentication of the

关键词： edible flowers Volatilomic fingerprint HS-SPMe/GC-MS Multivariate statistical analysis

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Anomalous transport of light at the phase transition to localization:strong dependence with incident angle

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Photonics Research 2018年第10期 55-68页

作者： IPeN M.C.S.XAVIeR IPeN VALdeCI MeSTRe WeLITON S.MARTINS GABRIeL F.BASSO V.A.eRMAKOV F.C.MARQUeS GILBeRTO F.de S Instituto de Pesquisas energéticas e Nucleares CNeN departamento de F?′sica Universidade Federal da Para?′ba departamento de F?′sica Universidade Estadual da Para?′ba 4. Instituto de Pesquisas Energéticas e Nucleares CNEN 5. CCEA Universidade Estadual da Para?′ba 6. Departamento de F?′sica Universidade Federal Rural de Pernambuco 7. Departamento de Informática Universidade Federal da Para?′ba 8. Departamento de F?′sica Aplicada Universidade Estadual de Campinas 9. Qu?′mica Fundamental Universidade Federal de Pernambuco

There has been a growing interest in disordered optical media in recent years due to their potential applications in solar collectors, random lasers, light confinement, and other advanced photonic functions. This paper studies the transport of light for different incidence angles in a strongly disordered optical medium composed of core-shell TiO@Silica nanoparticles suspended in an ethanol solution. A decrease of optical conductance and an increase of absorption near the input border are reported when the incidence angle increases. The specular reflection, measured for the photons that enter the sample, is lower than the effective internal reflection undergone by the coherently backscattered photons in the exact opposite direction, indicating a nonreciprocal propagation of *** study represents a novel approach in order to understand the complex physics involved at the phase transition to localization.

关键词： der exp Anomalous transport of light at the phase transition to localization:strong dependence with incident angle

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Rheological and Morphological Properties of Composites Based on Polylactide and Talc

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材料科学与工程（中英文B版） 2013年第11期3卷 695-699页

作者： Talita F. Cipriano Ana Lucia Nazareth da Silva Antonio Henrique Monteiro da Fonseca Thome da Silva AnaMaria Furtado de Sousa Gustavo Monteiro da Silva Christine Rabello do Nascimento Instituto de Macromol~culas Professora eloisa Mano (IMA/UFRJ) Rio de Janeiro 21945-970 Brasil departamento Agricola e Meio Ambiente (UFF) Niteroi 24210-240 Brasil Instituto de Quimica (IQ/UeRJ) 20550-013 Brasil Programa de engenharia Metalurgica (PeMM/COPPe/UFRJ) Rio de Janeiro 21941-908 Brasil

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Anomalous transport of light at the phase transition to localization:strong dependence with incident angle

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Photonics Research 2018年第10期6卷 929-942页

作者： eRNeSTO JIMeNeZ-VILLAR M.C.S.XAVIeR NIKLAUS U.WeTTeR VALdeCI MeSTRe WeLITON S.MARTINS GABRIeL F.BASSO V.A.eRMAKOV F.C.MARQUeS GILBeRTO F.de SA Instituto de Pesquisas energeticas e Nucleares CNEN_IPENSao PauloSP 05508-000Brazil departamento de Ffsica Universidade Federal da ParaibaJoao PessoaPB 58051-970Brazil departamento de Fisica Universidade Estadual da ParaibaArarunaPB 58233-000Brazil CCeA Universidade Estadual da ParaibaPatosPB 58706-560Brazil departamento de Fisica Universidade Federal Rural de PernambucoRecifePE 52171-900Brazil departamento de Informatica Universidade Federal da ParaibaJoao PessoaPB 58055-000Brazil departamento de Fisica Aplicada Universidade Estadual de CampinasCampinasSP 13083-859Brazil Quimica Fundamental Universidade Federal de PernambucoRecifePE 50670-901Brazil

There has been a growing interest in disordered optical media in recent years due to their potential applications in solar collectors, random lasers, light confinement, and other advanced photonic functions. This paper studies the transport of light for different incidence angles in a strongly disordered optical medium composed of core-shell TiO_2@Silica nanoparticles suspended in an ethanol solution. A decrease of optical conductance and an increase of absorption near the input border are reported when the incidence angle increases. The specular reflection, measured for the photons that enter the sample, is lower than the effective internal reflection undergone by the coherently backscattered photons in the exact opposite direction, indicating a nonreciprocal propagation of *** study represents a novel approach in order to understand the complex physics involved at the phase transition to localization.

关键词：光学介质太阳能通讯技术发展现状

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Impact Containment Barriers with Geotextile Tubes

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Journal of Geoscience and environment Protection 2024年第5期12卷 325-344页

作者： Flávio da Silva Ornelas Luís Fernando Martins Ribeiro Rafael Cerqueira Silva Instituto Federal de educaç &#227o Ci&#234ncia e Tecnologia&#8212IFTO Palmas Brasil departamento de engenharia Civil e Ambiental Programa de p&#243s gradua&#231&#227o em Geotecnia Universidade de Bras&#237lia&#8212UnB/Campus Universit&#225rio Darcy Ribeiro Bras&#237lia Brasil

Recently, tragic tailings dam collapses in Brazil have caused deaths and major destruction and the need to develop technologies capable of preventing damage to people and the environment. Brazilian tailings dams are in a situation of uncertainty due to new legislation that even requires decommissioning, an activity that involves many problems and where the risk of failure is the main one. An impact containment structure downstream of these dams can be effective and geotextile tubes, in a new approach, have emerged as an option with advantages in terms of execution, costs and safety. The technology is versatile and can bring many benefits such as the reuse of tailings or filling with low-energy or reused materials. In this research, geotextile tubes were tested as free containment barriers, experiencing impacts in reduced models. The safety factor for the stability of the structure was constructed using an equation which is the ratio between the self-weight of the barrier structure and its coefficient of static friction and the impact pressure, where the data showed an adequate correlation which suggests the viability of mitigating risks.

关键词： Geotextile Tube debris Flow Barriers Impact Mining

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