54 research outputs found
Molecular systematics of the armored neotropical catfish subfamily Neoplecostominae (Siluriformes: Loricariidae)
No full textRoxo, Fábio F., Zawadzki, Cláudio H., Da Costa Silva, Guilherme J., Chiachio, Marcio C., Foresti, Fausto, Oliveira, Claudio (2012): Molecular systematics of the armored neotropical catfish subfamily Neoplecostominae (Siluriformes: Loricariidae). Zootaxa 3390 (1): 33-42, DOI: 10.11646/zootaxa.3390.1.3, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.3390.1.
FIGURE 2 in Molecular systematics of the armored neotropical catfish subfamily Neoplecostominae (Siluriformes: Loricariidae)
No full textFIGURE 2. Majority rule consensus tree obtained in Bayesian analysis. Numbers below branches are posterior probabilities obtained from 45,000 trees. Numbers above branches are bootstrap values from 1,000 bootstrap pseudoreplicates obtained in maximum-parsimony analysis. Values below 50% are not shown.Published as part of Roxo, Fábio F., Zawadzki, Cláudio H., Da Costa Silva, Guilherme J., Chiachio, Marcio C., Foresti, Fausto & Oliveira, Claudio, 2012, Molecular systematics of the armored neotropical catfish subfamily Neoplecostominae (Siluriformes: Loricariidae), pp. 33-42 in Zootaxa 3390 (1) on page 38, DOI: 10.11646/zootaxa.3390.1.3, http://zenodo.org/record/525403
Molecular systematic and historical biogeography of the armored Neotropical catfishes Hypoptopomatinae and Neoplecostominae (Siluriformes: Loricariidae)
No full textThe Neotropics possess the greatest freshwater fish diversity of the world, rendering the study of their evolutionary history extremely challenging. Loricariidae catfishes are one of the most diverse components of the Neotropical ichthyofauna and despite a long history of classification, major issues still need elucidation. Based on a nuclear gene, we present a robust phylogeny of two former loricariid subfamilies: Hypoptopomatinae and Neoplecostominae. Our results show that Neoplecostominae is nested within Hypoptopomatinae, and is the sister group to the former Otothyrini tribe. According to our results, supplemented by morphological observations, we erect two new subfamilies, the Otothyrinae and a new Hypoptopomatinae, and modify the Neoplecostominae by including the genus Pseudotocinclus. The uncovered evolutionary relationships allow a detailed analysis of their historical biogeography. We tested two Dispersal-Extinction-Cladogenesis models for inferring the distribution range evolution of the new subfamilies, and show that the model having no constrains performs better than a model constraining long-range dispersal. The Maximum Likelihood reconstructions of ancestral ranges showed a marked division between the Amazonian origin of the Hypoptopomatinae and the eastern coastal Brazil + Upper Parana origin of the Neoplecostominae and Otothyrinae. Markedly few instances of dispersal across the border separating the Amazon basin and the Parana-Paraguay + eastern coastal Brazil + Uruguay were reconstructed. This result is in clear contrast with the historical biogeography of many Neotropical fishes, including other Loricariidae. Part of the dispersal limitation may be explained by divergent ecological specialization: lowland rivers versus mountain streams habitats. Moreover, because most species of the new subfamilies are small, we hypothesize that body size-related effects might limit their dispersal, like predation and energetic cost to migration. Finally, morphological and anatomical features are presented that limit or, to the contrary, enhance dispersal capability in these small and fascinating catfishes. (C) 2008 Elsevier B.V. All rights reserved.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Swiss National Science Foundation (JIMB)Foundation G A ClarazUniv Estadual Paulista, Dept Morfol, Inst Biociencias, Lab Biol Genet Peixes, BR-18618000 Botucatu, SP, BrazilUniv Geneva, Dept Zool & Anim Biol, CH-1211 Geneva 4, SwitzerlandUniv Estadual Paulista, Dept Morfol, Inst Biociencias, Lab Biol Genet Peixes, BR-18618000 Botucatu, SP, BrazilSNSF (JIMB): Ndegrees3100A0-10400
Erratum: How to use digital devices to detect and manage arrhythmias: an EHRA practical guide (EP Europace (2022) 24:6 (979-1005) DOI: 10.1093/europace/euac038)
No full textIn the originally published version of this manuscript, the names of authors Marcio Jansen de Oliveira Figueiredo and Manlio F. Márquez were incorrectly given. Both names have now been corrected online. In addition, the following affiliation was inadvertently omitted for author Manlio F. Márquez: Cardiology, Electrophysiology Service, American British Cowdray Medical Center, Mexico City, México This affiliation has now been added to the online version of the manuscript as affiliation 27 and all subsequent affiliations in this manuscript affected by this change have been updated accordingly
Metagenomic analysis of the canine oral cavity as revealed by high-throughput pyrosequencing of the 16S rRNA gene
No full text
Evolutionary and biogeographic history of the subfamily Neoplecostominae (Siluriformes: Loricariidae)
No full textFreshwater fish evolution has been shaped by changes in the earth's surface involving changes in the courses of rivers and fluctuations in sea level. The main objective of this study is to improve our knowledge of the evolution of loricariids, a numerous and adaptive group of freshwater catfish species, and the role of geological changes in their evolution. We use a number of different phylogenetic methods to test the relationships among 52 representative taxa within the Neoplecostominae using 4676 bps of mitochondrial and nuclear DNA. Our analysis revealed that the subfamily Neoplecostominae is monophyletic, including Pseudotocinclus, with three lineages recognized. The first lineage is composed of part of Pareiorhina rudolphi, P. cf. rudolphi, and Pseudotocinclus; the second is composed of Isbrueckerichthys, Pareiorhaphis, Kronichthys, and the species Neoplecostomus ribeirensis; and the third is composed of Pareiorhina carrancas, P. cf. carrancas, Pareiorhina sp. 1, a new genus, and all the species of the genus Neoplecostomus, except N. ribeirensis. The relaxed molecular clock calibration provides a temporal framework for the evolution of the group, which we use for a likelihood-based historical biogeographic analysis to test relevant hypotheses on the formation of southeast Brazil. We hypothesize that headwater capture events and marine regressions have shaped the patterns of distribution within the subfamily Neoplecostominae throughout the distinct basins of southeast Brazil.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Estadual Paulista, Dept Morfol, Inst Biociencias, Lab Biol & Genet Peixes,UNESP, BR-18618000 Botucatu, SP, BrazilUniversidade Estadual de Maringá (UEM), Nupelia, UEM, Maringa, Parana, BrazilUniv Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USAUniv Estadual Paulista, UNESP, Dept Zool & Bot, Lab Ictiol, Sao Jose do Rio Preto, SP, BrazilUniv Estadual Paulista, Dept Morfol, Inst Biociencias, Lab Biol & Genet Peixes,UNESP, BR-18618000 Botucatu, SP, BrazilUniv Estadual Paulista, UNESP, Dept Zool & Bot, Lab Ictiol, Sao Jose do Rio Preto, SP, BrazilCNPq: 484716-2006-9CNPq: 306066/2009-2CNPq: 303854/2009-0FAPESP: 10/01610-
Aço ABNT 1045 esferoidizado: estudo da cinética de coalescimento e correlações entre microestruturas e propriedades mecânicas
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência e Engenharia de MateriaisEste trabalho teve por objetivo estudar o processo de recozimento de esferoidização de um aço SAE 1045 e correlacionar as suas propriedades mecânicas com as respectivas microestruturas apresentadas. As amostras foram laminadas à frio (com 21% de deformação) e também temperadas (austenitizadas em 850ºC, 1000ºC e 1100ºC por 30 minutos e resfriadas em água), de modo a obter diferentes microestruturas, prévias ao recozimento de esferoidização. Para o estudo do efeito das variações dos tratamentos térmicos na esferoidização foram utilizados dois ciclos térmicos: um subcrítico, logo abaixo de Ac1 (710ºC por 18 e 22 horas) e outro pendular, em torno de Ac1 (entre 740ºC e 680ºC) por 22 horas. Estas variações no processo de preparação das amostras, objetivaram ampliar as diferenças entre os parâmetros a serem avaliados, de modo a melhor correlacioná-los com as propriedades mecânicas obtidas. Análises qualitativas e quantitativas foram realizadas via microscopia ótica e eletrônica de varredura. O comportamento mecânico foi avaliado a partir de ensaios de tração e de dureza das amostras esferoidizadas. Variações na distribuição e forma dos carbonetos, bem como, do tamanho de grão ferrítico, influenciaram de forma direta as propriedades do aço esferoidizado, indicando uma maior dependência das propriedades mecânicas sobre os carbonetos, que do tamanho de grão ferrítico. A cinética de esferoidização também foi estudada, visando fornecer informações referente ao comportamento do aço SAE 1045 frente a duas microestruturas prévias, uma deformada e outra temperada. Boas correlações foram obtidas após a análise dos resultados apresentados
Thermoelectric study of Co2FeAl thin films grown onto flexible P(VDF-TrFE-CFE) terpolymer
No full textThe necessity of energy conversion solutions has increased over the last years due to the necessity to power the small and flexible devices related to the Internet of things (IoT) concept. One of the most promissory ways to address this challenge relies on thermoelectric effects, such as the anomalous Nernst effect. Here flexible poly (vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) - P(VDF-TrFE-CFE) terpolymer sheet with high dielectric constant were produced by the doctor blade technique and used as the substrate to produce Co2FeAl/P(VDF-TrFE-CFE) heterostructures. The Co2FeAl layers were grown by magnetron sputtering with a thickness of 40 nm. The integration of P(VDF-TrFE-CFE) and magnetron sputtered Co2FeAl thin films allowed to explore the thermomagnetic properties of the composite through the Anomalous Nernst Effect and the influence of the flexible P(VDF-TrFE-CFE) substrate on this effect. The morphological, dielectric, and mechanical properties of the polymer were analyzed, as well as the structural, and magnetic properties of the magnetic thin films to support the thermomagnetic results. The Co2FeAl ferromagnetic thin films presented an isotropic magnetic behaviour, which was reflected in the thermomagnetic curves. Further, the curve's shape is stable irrespective of the thermal gradient and angle of the external magnetic field. The study demonstrates that it is possible to change from a rigid substrate (glass) to a flexible one (polymer), without affecting the thermomagnetic effect. Our findings open new possibilities to produce and integrate flexible high-dielectric polymers with thermomagnetic phenomena, which can be further explored for energy harvesting applications.This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/04650/2020, UID/QUI/00686/2020 and under projects MIT-EXPL/TDI/0033/2021, POCI-01–0247-FEDER-046985 and 2022.03931. PTDC, funded by national funds through FCT and by the ERDF through the COMPETE2020—Programa Operacional Competitividade e Internacionalizaç ão (POCI). The authors also thank the FCT for financial support under Grant 2021.07361.BD (R.S.P.) and FCT investigator contracts CEECIND/00833/2017 (RG) and 2020.04028. CEECIND (C.M.C.). Marcio A. Correa gratefully acknowledges the CAPES (8887.573100/2020–00) and CNPq. A. Ferreira thanks the FCT for the contract under the Stimulus of Scientific Employment (CTTI-31/18 – CF (2) junior researcher contract). Senentxu Lanceros-Mendez thanks the Basque Government Education and Industry Department under the IKUR and ELKARTEK programs, respectively. Author Marcio A Correa acknowledges support of the INCT of Spintronics and Advanced Magnetic Nanostructures (INCT-SpinNanoMag), CNPq 406836/2022–1
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