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Parasite Fauna of Lutjanus synagris Commercialized in the Fish Market from Bragança-PA,Brazil

journal of Zoological Research 2019年第3期1卷 1-4页

作者： Natalino da Costa Sousa Daiana Silva dos Santos Silmara Rosa Silva Alexandre Vaz da Silva Jucimauro de Araújo P.Junior joão vitor antunes miranda Pedro Rodrigo Nery de Souza Matheus Carvalho de Melo Fagner de Melo Xavier Wellington Lima da Silva Junior Fabricio Ramos Menezes Márcia Valeria Silva do Couto Federal University of Pará(UFPA) Campus BragançaAlameda Leandro RibeiroBragança68600-000PABrazil Federal University of Pará(UFPA) Campus Tucuruí-ParáBrazil Federal University of Sergipe(UFS) Departamento de Pesca e Aquicultura.Aracaju-SergipeBrazil Instituto Federal do Pará(IFPA) Campus de Cametá-ParáBrazil

Studies about the parasite fauna of marine fish highlights as an important problem for public health with zoonotic parasites or affecting the fish ***,this study evaluated the parasite fauna of Lutjanus synagris commercialized in the fish market from Braganç*** laboratory,58 fish were measured,weighted and conducted to parasitological analysis to determine parasitological indexes and relative *** parasite was fixed and identified until to the lowest taxonomic *** the parasitological analysis,it found Cymothoidae,Digenea,Cucullanus *** Procamallanus(Spirocamallanus)sp.,with total prevalence 67.24%.Digenea showed the highest prevalence and mean intensity *** nematode,Cucullanus *** the greater prevalence and relative dominance,while Procamallanus(Spirocamallanus)*** the greater mean intensity and *** showed the lowest prevalence and mean intensity *** conclusion,the parasite fauna of *** has been noted with low diversity,reporting the nematode occurrence Procamallanus(Spirocamallanus).

关键词： Cymothoidae Parasite Marine fish

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Improvement in varistor properties of CaCu_(3)Ti_(1)o_(12) ceramics by chromium addition

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journal of Materials Science & Technology 2020年第6期41卷 12-20页

作者： Edson Cezar Grzebielucka joao Frederico Haas Leandro Monteiro Eder Carlos Ferreira de Souza Christiane Philippini Ferreira Borges Andrévitor Chaves de Andrade Eloísa Cordoncillo Héctor Beltrán-Mir Sandra Regina Masetto antunes Programa Pós-Graduacao em Química Aplicada Universidade Estadual de Ponta GrossaAv.Gen.Carlos Cavalcanti 474884.030-000Ponta GrossaParanáBrazil Programa de Pós-Graduacao em Ciências/Física Universidade Estadual de Ponta GrossaAv.Gen.Carlos Cavalcanti 474884.030-000Ponta GrossaParanáBrazil Dpto.de Química Inorgánica y orgánica Universitat Jaume IAv.de Vicent Sos Baynats/n12071Castellón de la PlanaSpain

The effect of chromium addition on the structure and electrical properties of CaCu3Ti4o12 is *** based on the formula CaCu3Ti4-xCrxo12-σ(x = 0, 0.025, 0.050 and 0.075 mol%) are prepared by solid-state reaction. Pellets sintered at 1070℃ for 12 h are characterised by X-ray diffraction, scanning electron microscopy/energy dispersive spectroscopy and impedance spectroscopy. Current densityelectric field, dielectric loss and permittivity measurements are also carried out. Rietveld refinement showed the substitution of Cr(Ⅲ) on the Ti(Ⅳ) site, with the maximum substitution for x = 0.025 mol%.The generation of electrical defects in the grain boundary region by chromium doping is responsible for increasing the electric breakdown field strength and nonlinearity coefficient at room temperature from 1723 V/cm and 5.29 for x = 0 mol% to 3431 V/cm and 8.16 for x = 0.025 mol%. This composition shows the greatest improvement in ceramic varistor parameters.

关键词： CCTo Structural analysis Impedance Varistor Rietveld

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