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1.
Seasonal variation of gastrointestinal parasitic infections in goats and sheep in São Luís, Maranhão, Brazil Luís Maranhão
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CASTRO, Rogério Lean Pereira
; BRITO, Danilo Rodrigues Barros
; PIRES FILHO, Pedro Celestino Serejo
; SOARES, Swênia Christina Pinheiro
; CUNHA, Arnon Reis
; PINHEIRO, Dara Maria da Costa
; PINHEIRO, Yasmin Suelen Alves
; BUNA, Nayla Helena Silva
; CASTRO, Maria Leiciane Paiva
.
RESUMO O objetivo deste estudo foi verificar as infecções por parasitas gastrintestinais em caprinos e ovinos de acordo com a variação sazonal no município de São Luís, estado do Maranhão, Brasil. Foram realizadas colheitas de amostras de fezes diretamente das ampolas retais dos animais a cada 30 dias do experimento para contagem de ovos por gramas de fezes no período de 12 meses. Um total de 40 pequenos ruminantes foram utilizados no presente estudo. Destes, 22 eram caprinos (14 matrizes, 6 cabritos e 2 reprodutores) e 18 ovinos (13 matrizes, 4 cordeiros e 1 reprodutor). Foi mensurada a variação na excreção de ovos de nematoides gastrintestinais durante o período seco e chuvoso. Foi realizada cultura e identificação das larvas de terceiro estágio. Considerando os 12 meses de pesquisa e a quantidade de coletas mensais, o número de ovos detectados nas amostras fecais de caprinos e de ovinos foram de 95,9 e 82,3% de endoparasitos, respectivamente. Quanto à presença de oocistos de Eimeria spp, foi identificada frequência de 50,6% em caprinos e 30,4% em ovinos. Os resultados indicaram que, no período chuvoso a média dos ovos por grama de fezes foi maior, para as duas espécies estudadas. Os gêneros de nematoides gastrintestinais identificados recuperados da coprocultura, realizado mensalmente, revelou presença de Haemonchus sp. seguido por Trichostrongylus sp. e Oesophagostomum sp. Conclui-se que no período chuvoso o parasitismo por nematóides gastrintestinais em caprinos e ovinos foi maior e os gêneros Haemonchus sp. e Trichostrongylus sp. foram os mais prevalentes. Luís Maranhão Brasil 3 Destes 14 (1 matrizes reprodutores 13 reprodutor. reprodutor . reprodutor) estágio mensais 959 95 9 95, 823 82 82,3 endoparasitos respectivamente spp 506 50 50,6 304 30,4 estudadas coprocultura mensalmente sp Concluise Conclui se prevalentes ( 8 82, 5 50, 30,
ABSTRACT This study aimed to analyze the seasonal variation of gastrointestinal parasitic infections in goats and sheep in São Luís, Maranhão, Brazil. Fecal samples were collected directly from the rectal ampulla of the animals to count the eggs per gram in the feces at 30-day intervals over the 12-month study period. This study included 40 small ruminants, comprising 22 goats (14 sows, 6 kids, and 2 sires) and 18 sheep (13 sows, 4 lambs, and 1 sire). The study assessed the variation in the excretion of gastrointestinal nematode eggs during the dry and rainy seasons. Coproculture was performed to identify third-stage larvae. In the 12 months of research and monthly sample collections, 95.9% and 82.3% of the eggs detected were endoparasites in the fecal samples of the goats and sheep, respectively. Eimeria spp. oocysts were present in 50.6% and 30.4% of the goat and sheep fecal samples, respectively. The results indicated that the mean number of eggs per gram of feces was higher in the rainy season than in the dry season in both goats and sheep. The genera of gastrointestinal nematodes identified via monthly coproculture tests were Haemonchus sp., Trichostrongylus sp., and Oesophagostomum sp. Thus, gastrointestinal nematode parasitism was higher in goats and sheep during the rainy season than in the dry season, and the genera Haemonchus sp. and Trichostrongylus sp. were the most prevalent. Luís Maranhão Brazil 30day day 30 12month month period ruminants 14 (1 sows kids sires 13 lambs sire. sire . sire) seasons thirdstage third stage larvae collections 959 95 9 95.9 823 82 3 82.3 respectively spp 506 50 50.6 304 30.4 sp Thus prevalent ( 95. 8 82. 5 50. 30.
2.
Ediacaran-Cambrian microbialites of the Southern Amazon Craton: relation with the metazoan rise, sea-level changes, and global tectonics
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Nogueira, Afonso César Rodrigues
; Santos, Renan Fernandes dos
; Romero, Guilherme Raffaeli
; Bandeira, José
; Riccomini, Claudio
; Barrera, Ivan Alfredo Romero
; Silva, Pedro Augusto Santos da
; Soares, Joelson Lima
; Fairchild, Thomas
; Nogueira, Anna Andressa Evangelista
; Góes, Ana Maria
; Oliveira, Rick Souza de
; Medeiros, Renato Sol Paiva de
; Andrade, Luiz Saturnino de
; Brito, Ailton da Silva
; Oliveira, Pedro Guilherme Assunção
; Sodré, Argel de Assis Nunes
; Carvalho, Davi Ferreira de
; Truckenbrodt, Werner
.
Abstract Microbialites are the most abundant life evidence in Precambrian sedimentary rocks. They are produced by microbial interaction activity and sedimentary processes reflecting paleoenvironmental conditions. The Ediacaran-Cambrian carbonate and siliciclastic successions in the Southern Amazon Craton in Central Brazil, provide a key opportunity to understand how the metazoan life coexisted with the microbial communities. The spatial and temporal distribution of microbialites as well as morphological and paleoenvironmental changes have been assessed, reinterpreting previous works and including new data from the Araras-Alto Paraguai and Corumbá basins. The deposition was controlled by subsidence and sea-level changes that affected these basins, considered extensions of epicontinental seas during the Gondwana assembly. The stromatolites are restricted to coastal deposits and experienced thriving flourishment intervals after the Marinoan Glaciation (635 Ma). Post-glacial transgression was marked by microbial colonization in shallow platforms represented by stratiform and giant domical stromatolites in the Araras-Alto Paraguai Basin. The continuity of the transgression generated a moderately deep aragonite sea at about 622 Ma. A progressive sea-level fall caused the implantation of coastal environments under greenhouse conditions with tidal flat and sabkha settings colonized by centimetric-scale stromatolites. The sea retreat was accompanied by progressive uplift, causing a moderate inversion of the basin and erosion of the succession until ~560 Ma with the deposition of the last preserved tidal flat deposits with the occurrence of thrombolites. The subsiding Corumbá Basin was the site of microbially-induced deposition of carbonates in a shallow platform connected to an offshore setting with the proliferation of metazoan straddling the Ediacaran-Cambrian boundary. Microbial communities were restricted to lagoon deposits during the Lower Cambrian transgression in the Araras-Alto Paraguai Basin and the last phase refers to the sea retreat towards southeast, developing a fluvial system connected with the arid and evaporitic tidal flats colonized by microbialites that lasted until the upper Cambrian. Except for the post-glacial stromatolites, the columnar and domal microbialite indicate that the coastal settings dominated the Ediacaran-Cambrian transition. The preservation of microbialites in the post-glacial intervals can be associated with the Mg-Ca-CO3 oversaturation in dolomitic platforms. The rapid calcification and ability to resist the dissolution and replacement have increased the stromatolites’ preservation potential reported here, where its well-preserved occurrence in tidal flats and sabkha occurs due to intense early diagenetic silicification. The change from carbonate accumulation to siliciclastic-rich environments contributed to the demise of microbially-induced strata. In general, the scarce coexistence between coastal stromatolite and metazoan-bearing marine deposits makes it challenging to establish a competitive relationship between these organisms, as previously postulated.
3.
Práticas de ressuscitação volêmica em unidades de terapia intensiva brasileiras: uma análise secundária do estudo Fluid-TRIPS
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Freitas, Flavio Geraldo Rezende de
; Hammond, Naomi
; Li, Yang
; Azevedo, Luciano Cesar Pontes de
; Cavalcanti, Alexandre Biasi
; Taniguchi, Leandro
; Gobatto, André
; Japiassú, André Miguel
; Bafi, Antonio Tonete
; Mazza, Bruno Franco
; Noritomi, Danilo Teixeira
; Dal-Pizzol, Felipe
; Bozza, Fernando
; Salluh, Jorge Ibrahin Figueira
; Westphal, Glauco Adrieno
; Soares, Márcio
; Assunção, Murillo Santucci César de
; Lisboa, Thiago
; Lobo, Suzana Margarete Ajeje
; Barbosa, Achilles Rohlfs
; Ventura, Adriana Fonseca
; Souza, Ailson Faria de
; Silva, Alexandre Francisco
; Toledo, Alexandre
; Reis, Aline
; Cembranel, Allan
; Rea Neto, Alvaro
; Gut, Ana Lúcia
; Justo, Ana Patricia Pierre
; Santos, Ana Paula
; Albuquerque, André Campos D. de
; Scazufka, André
; Rodrigues, Antonio Babo
; Fernandino, Bruno Bonaccorsi
; Silva, Bruno Goncalves
; Vidal, Bruno Sarno
; Pinheiro, Bruno Valle
; Pinto, Bruno Vilela Costa
; Feijo, Carlos Augusto Ramos
; Abreu Filho, Carlos de
; Bosso, Carlos Eduardo da Costa Nunes
; Moreira, Carlos Eduardo Nassif
; Ramos, Carlos Henrique Ferreira
; Tavares, Carmen
; Arantes, Cidamaiá
; Grion, Cintia
; Mendes, Ciro Leite
; Kmohan, Claudio
; Piras, Claudio
; Castro, Cristine Pilati Pileggi
; Lins, Cyntia
; Beraldo, Daniel
; Fontes, Daniel
; Boni, Daniela
; Castiglioni, Débora
; Paisani, Denise de Moraes
; Pedroso, Durval Ferreira Fonseca
; Mattos, Ederson Roberto
; Brito Sobrinho, Edgar de
; Troncoso, Edgar M. V.
; Rodrigues Filho, Edison Moraes
; Nogueira, Eduardo Enrico Ferrari
; Ferreira, Eduardo Leme
; Pacheco, Eduardo Souza
; Jodar, Euzebio
; Ferreira, Evandro L. A.
; Araujo, Fabiana Fernandes de
; Trevisol, Fabiana Schuelter
; Amorim, Fábio Ferreira
; Giannini, Fabio Poianas
; Santos, Fabrício Primitivo Matos
; Buarque, Fátima
; Lima, Felipe Gallego
; Costa, Fernando Antonio Alvares da
; Sad, Fernando Cesar dos Anjos
; Aranha, Fernando G.
; Ganem, Fernando
; Callil, Flavio
; Costa Filho, Francisco Flávio
; Dall´Arto, Frederico Toledo Campo
; Moreno, Geovani
; Friedman, Gilberto
; Moralez, Giulliana Martines
; Silva, Guilherme Abdalla da
; Costa, Guilherme
; Cavalcanti, Guilherme Silva
; Cavalcanti, Guilherme Silva
; Betônico, Gustavo Navarro
; Betônico, Gustavo Navarro
; Reis, Hélder
; Araujo, Helia Beatriz N.
; Hortiz Júnior, Helio Anjos
; Guimaraes, Helio Penna
; Urbano, Hugo
; Maia, Israel
; Santiago Filho, Ivan Lopes
; Farhat Júnior, Jamil
; Alvarez, Janu Rangel
; Passos, Joel Tavares
; Paranhos, Jorge Eduardo da Rocha
; Marques, José Aurelio
; Moreira Filho, José Gonçalves
; Andrade, Jose Neto
; Sobrinho, José Onofre de C
; Bezerra, Jose Terceiro de Paiva
; Alves, Juliana Apolônio
; Ferreira, Juliana
; Gomes, Jussara
; Sato, Karina Midori
; Gerent, Karine
; Teixeira, Kathia Margarida Costa
; Conde, Katia Aparecida Pessoa
; Martins, Laércia Ferreira
; Figueirêdo, Lanese
; Rezegue, Leila
; Tcherniacovsk, Leonardo
; Ferraz, Leone Oliveira
; Cavalcante, Liane
; Rabelo, Ligia
; Miilher, Lilian
; Garcia, Lisiane
; Tannous, Luana
; Hajjar, Ludhmila Abrahão
; Paciência, Luís Eduardo Miranda
; Cruz Neto, Luiz Monteiro da
; Bley, Macia Valeria
; Sousa, Marcelo Ferreira
; Puga, Marcelo Lourencini
; Romano, Marcelo Luz Pereira
; Nobrega, Marciano
; Arbex, Marcio
; Rodrigues, Márcio Leite
; Guerreiro, Márcio Osório
; Rocha, Marcone
; Alves, Maria Angela Pangoni
; Alves, Maria Angela Pangoni
; Rosa, Maria Doroti
; Dias, Mariza D’Agostino
; Martins, Miquéias
; Oliveira, Mirella de
; Moretti, Miriane Melo Silveira
; Matsui, Mirna
; Messender, Octavio
; Santarém, Orlando Luís de Andrade
; Silveira, Patricio Júnior Henrique da
; Vassallo, Paula Frizera
; Antoniazzi, Paulo
; Gottardo, Paulo César
; Correia, Paulo
; Ferreira, Paulo
; Torres, Paulo
; Silva, Pedro Gabrile M. de Barros e
; Foernges, Rafael
; Gomes, Rafael
; Moraes, Rafael
; Nonato filho, Raimundo
; Borba, Renato Luis
; Gomes, Renato V
; Cordioli, Ricardo
; Lima, Ricardo
; López, Ricardo Pérez
; Gargioni, Ricardo Rath de Oliveira
; Rosenblat, Richard
; Souza, Roberta Machado de
; Almeida, Roberto
; Narciso, Roberto Camargo
; Marco, Roberto
; waltrick, Roberto
; Biondi, Rodrigo
; Figueiredo, Rodrigo
; Dutra, Rodrigo Santana
; Batista, Roseane
; Felipe, Rouge
; Franco, Rubens Sergio da Silva
; Houly, Sandra
; Faria, Sara Socorro
; Pinto, Sergio Felix
; Luzzi, Sergio
; Sant’ana, Sergio
; Fernandes, Sergio Sonego
; Yamada, Sérgio
; Zajac, Sérgio
; Vaz, Sidiner Mesquita
; Bezerra, Silvia Aparecida Bezerra
; Farhat, Tatiana Bueno Tardivo
; Santos, Thiago Martins
; Smith, Tiago
; Silva, Ulysses V. A.
; Damasceno, Valnei Bento
; Nobre, Vandack
; Dantas, Vicente Cés de Souza
; Irineu, Vivian Menezes
; Bogado, Viviane
; Nedel, Wagner
; Campos Filho, Walther
; Dantas, Weidson
; Viana, William
; Oliveira Filho, Wilson de
; Delgadinho, Wilson Martins
; Finfer, Simon
; Machado, Flavia Ribeiro
.
RESUMO Objetivo: Descrever as práticas de ressuscitação volêmica em unidades de terapia intensiva brasileiras e compará-las com as de outros países participantes do estudo Fluid-TRIPS. Métodos: Este foi um estudo observacional transversal, prospectivo e internacional, de uma amostra de conveniência de unidades de terapia intensiva de 27 países (inclusive o Brasil), com utilização da base de dados Fluid-TRIPS compilada em 2014. Descrevemos os padrões de ressuscitação volêmica utilizados no Brasil em comparação com os de outros países e identificamos os fatores associados com a escolha dos fluidos. Resultados: No dia do estudo, foram incluídos 3.214 pacientes do Brasil e 3.493 pacientes de outros países, dos quais, respectivamente, 16,1% e 26,8% (p < 0,001) receberam fluidos. A principal indicação para ressuscitação volêmica foi comprometimento da perfusão e/ou baixo débito cardíaco (Brasil 71,7% versus outros países 56,4%; p < 0,001). No Brasil, a percentagem de pacientes que receberam soluções cristaloides foi mais elevada (97,7% versus 76,8%; p < 0,001), e solução de cloreto de sódio a 0,9% foi o cristaloide mais comumente utilizado (62,5% versus 27,1%; p < 0,001). A análise multivariada sugeriu que os níveis de albumina se associaram com o uso tanto de cristaloides quanto de coloides, enquanto o tipo de prescritor dos fluidos se associou apenas com o uso de cristaloides. Conclusão: Nossos resultados sugerem que cristaloides são usados mais frequentemente do que coloides para ressuscitação no Brasil, e essa discrepância, em termos de frequências, é mais elevada do que em outros países. A solução de cloreto de sódio 0,9% foi o cristaloide mais frequentemente prescrito. Os níveis de albumina sérica e o tipo de prescritor de fluidos foram os fatores associados com a escolha de cristaloides ou coloides para a prescrição de fluidos.
Abstract Objective: To describe fluid resuscitation practices in Brazilian intensive care units and to compare them with those of other countries participating in the Fluid-TRIPS. Methods: This was a prospective, international, cross-sectional, observational study in a convenience sample of intensive care units in 27 countries (including Brazil) using the Fluid-TRIPS database compiled in 2014. We described the patterns of fluid resuscitation use in Brazil compared with those in other countries and identified the factors associated with fluid choice. Results: On the study day, 3,214 patients in Brazil and 3,493 patients in other countries were included, of whom 16.1% and 26.8% (p < 0.001) received fluids, respectively. The main indication for fluid resuscitation was impaired perfusion and/or low cardiac output (Brazil: 71.7% versus other countries: 56.4%, p < 0.001). In Brazil, the percentage of patients receiving crystalloid solutions was higher (97.7% versus 76.8%, p < 0.001), and 0.9% sodium chloride was the most commonly used crystalloid (62.5% versus 27.1%, p < 0.001). The multivariable analysis suggested that the albumin levels were associated with the use of both crystalloids and colloids, whereas the type of fluid prescriber was associated with crystalloid use only. Conclusion: Our results suggest that crystalloids are more frequently used than colloids for fluid resuscitation in Brazil, and this discrepancy in frequencies is higher than that in other countries. Sodium chloride (0.9%) was the crystalloid most commonly prescribed. Serum albumin levels and the type of fluid prescriber were the factors associated with the choice of crystalloids or colloids for fluid resuscitation.
https://doi.org/10.5935/0103-507x.20210028
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4.
Accurate identification of atypical Staphylococcus chromogenes plasma-clotting strains causing bovine mastitis
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Avellar-Costa, Pedro
; Santos, Danielle Cabral dos
; Lange, Carla Christine
; Laport, Marinella Silva
; Brito, Maria Aparecida Vasconcelos Paiva
; Rossi, Ciro César
; Giambiagi-deMarval, Marcia
.
RESUMO: Nós comparamos o potencial de técnicas rotineiras utilizadas para a identificação de espécies de Staphylococcus, com o objetivo de avaliar a acurácia delas na detecção de 43 isolados de Staphylococcus chromogenes envolvidos com mastite bovina que, apesar de ser uma espécie coagulase-negativa, são capazes de coagular o plasma. Essas cepas poderiam ser erroneamente suspeitas de serem S. aureus e levarem a um tratamento não adequado da doença. MALDI-TOF, PCR-RFLP do gene da chaperonina groEL e sequenciamento do gene do rRNA 16S e do gene do fator de elongação Tu, tuf, foram avaliados. Os resultados dos quatro métodos foram coincidentes para apenas metade das cepas, devido à baixa precisão da PCR-RFLP com groEL (51,2% de acurácia). Apesar de todos os resultados do sequenciamento serem idênticos, a alta precisão dos resultados do MALDI-TOF (97,7% de acurácia, com apenas uma cepa identificada incorretamente) encoraja o uso dessa técnica, pois, não requer preparação laboriosa de amostras, sendo rápida e simples de executar.
ABSTRACT: We compared the potential of routine techniques used for the identification of Staphylococcus species, aiming to evaluate their accuracy in the detection of 43 Staphylococcus chromogenes strains isolated from bovine mastitis that, despite being a coagulase-negative species, are able to clot plasma. These strains could be mistakenly suspected to be S. aureus and lead to an unappropriated treatment of the disease. MALDI-TOF, PCR-RFLP of the chaperonine gene groEL, and sequencing of the 16S rRNA and elongation factor Tu gene tuf were employed. Results from the four methods were coincident for only half of the strains because of the low accuracy of the groEL PCR-RFLP (51.2% accuracy). Even though all the sequencing results were identical, the high accuracy of the MALDI-TOF results (97.7% accuracy, with only one strain misidentified) encourage the use of this technique, since it does not require laborious sample preparation, being fast and simple to perform.
https://doi.org/10.1590/0103-8478cr20190168
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5.
Effect of Low Temperature Nitriding of 100Cr6 Substrates on TiN Coatings Deposited by IBAD
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Vales, Sandra dos Santos
; Becerra, Erika Abigail Ochoa
; Brito, Pedro Paiva
; Droppa Junior, Roosevelt
; Garcia, Jose Luis
; Alvarez, Fernando
; Pinto, Haroldo Cavalcanti
.
In this paper we studied the influence of pre-treating the surface of 100Cr6 steel by ion beam nitriding at low temperature (380°C) on the surface topography and wear resistance of thin TiN coatings deposited by reactive ion beam assisted deposition. The specimens were characterized by grazing incidence X-ray diffraction, scanning electron microscopy and atomic force microscopy. The wear resistance of the TiN-coated specimens was evaluated by means of ball on disc tests. The results showed that application of a preliminary ion beam nitriding treatment slightly increased the surface roughness but improved the wear resistance of the 100Cr6 steel due to the formation of a diffusion zone containing the γ'-Fe4N nitride combined with the TiN coating.
https://doi.org/10.1590/1516-1439.266514
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6.
Solution and ageing heat treatments of ZK60 magnesium alloys with rare earth additions produced by semi-solid casting
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Silva, Erenilton Pereira da
; Batista, Larissa Fernandes
; Callegari, Bruna
; Buzolin, Ricardo Henrique
; Warchomicka, Fernando
; Requena, Guillermo Carlos
; Brito, Pedro Paiva
; Pinto, Haroldo Cavalcanti
.
Rare earth elements reportedly improve high temperature strength and creep resistance of Mg alloys. In the present work, ZK60 Mg alloys containing different amounts (0.5, 1.5 and 2.5 wt.%) of rare earth additions were prepared by thixocasting and submitted to solution and ageing heat treatments (T4, T5 and T6). The as-cast and heat treated microstructures were investigated by scanning electron microscopy and hardness was evaluated as a function of heat treatment parameters. In the as-cast state, the alloys are formed by globular α-Mg grains reinforced by a network of composite Mg-Zn-RE precipitates with either smooth or lamellar/acicular morphologies. Solution of the smooth precipitates took place in alloys containing 0.5 and 1.5wt.%RE for T4-500 ºC but no precipitates were dissolved with T4-380 ºC. The optimum temperature for T5 and T6 was identified as 175 ºC, while T6-500 ºC led to the highest hardness, followed by T5 and T6-380 ºC, respectively.
https://doi.org/10.1590/1516-1439.266214
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