Search | SciELO

ABSTRACT Natural Killer cells are immune leukocytes required for responses against tumor cells and virus-infected cells. In the last decade, natural killer cells have emerged as promising tools in cancer therapy, and clinical studies on patients treated with natural killer cells have revealed increased rates of disease-free survival. In this article, we review results from the major clinical trials that have used natural killer cells for cancer treatment, including their global distribution. We also discuss the major mechanisms of natural killer cell activation and expansion and focus on the advantages and disadvantages of each mechanism for clinical applications. Although natural killer cells can be isolated from several sources, primary natural killer cells are most commonly used in clinical trials. However, the frequency of natural killer cells available in peripheral and cord blood is low, necessitating development of methods for expansion of natural killer cells for clinical use. The development of a platform for the expansion of large-scale good manufacturing practice-compliant natural killer cells has limitations as several methods for natural killer cell activation and expansion yield conflicting results. Only techniques using feeder cells can produce large numbers of cells, allowing the “off-the-shelf” use of natural killer cells. However, advances in cell culture have supported the development of feeder-free platforms for natural killer cell expansion, which is fundamental for improving the safety of this type of cell therapy. virusinfected virus infected decade therapy diseasefree disease free survival article treatment distribution applications sources However low largescale scale practicecompliant practice compliant offtheshelf off shelf “off-the-shelf feederfree

https://doi.org/10.31744/einstein_journal/2024rw0612

New records of two cladoceran species (Branchiopoda: Anomopoda) from Northeastern Brazil: the importance of studies in temporary ponds
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Medeiros, Íttalo Luã Silva

; dos Santos, Felipe Antonio

; Cordeiro, Ralf Tarciso Silva

; Melo Júnior, Mauro de

Nauplius

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 29 elocation e2021038

Abstract: En | Text: En | PDF: En

Abstract Temporary ponds are heterogeneous aquatic environments, in which hydrodynamics and richness of macrophytes may increase the diversity of zooplankton and other invertebrate communities. Cladocerans are common residents of these ecosystems, showing great variability of forms. During a faunistic survey in temporary ponds under the influence of riparian vegetation, in the Camucim Forest Protected Area, Pernambuco Endemism Center, Brazil, the cladocerans Moina dumonti Kotov, Elías-Gutiérrez and Granado-Ramírez, 2005 and Chydorus nitidulus (Sars, 1901) were found. These are their first records in the Oriental Northeast Atlantic hydrographic region, and the second record of M. dumonti in Brazil. The present study raises Cladocera species richness in Pernambuco State to 73 and also 16 in the Pernambuco Endemism Center.

https://doi.org/10.1590/2358-2936e2021038 40 downloads

Morphological abnormalities in Acartia lilljeborgii Giesbrecht (1889) (Copepoda, Calanoida) in a tropical estuary under industrial development
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

MELO, PEDRO A.M. DE CASTRO

; NEUMANN-LEITÃO, SIGRID

; ZANARDI-LAMARDO, ELIETE

; FLORES-MONTES, MANUEL J.

; DE MELO JÚNIOR, MAURO

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 93 N. 2 elocation e20190231

Abstract: En | Text: En | PDF: En

Abstract Morphological abnormalities in crustaceans have been registered and several are attributed to pollution and others anthropogenic activities. This study reports for the first time a temporal record of the amount and variety of morphological abnormalities in Acartia lilljeborgii, in an impacted neotropical estuary. The specimens were obtained from Suape port area, Northeast Brazil, between May 2009 and September 2010 using a 300 µm plankton net. Seven types of abnormalities were observed in one of the terminal spines of the prosome, but no temporal variation of abnormalities was found in our study. The deformities were registered in 85.7% of samples and they were found in up to 10% of the individuals (3.2 ± 2.9%). The proportion of females with abnormalities was greater than for males, in opposite to most previous reports. Due to its high distribution and abundance in part of the neotropical Atlantic coastal area, A. lilljeborgii has the potential to be used as a bioindicator of environmental conditions, although the reasons of the abnormality occurrences should be accurately investigated.

https://doi.org/10.1590/0001-3765202120190231 338 downloads

Non-predatory mortality of planktonic microcrustaceans (Cladocera and Copepoda) in neotropical semiarid reservoirs
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

DINIZ, LEIDIANE P.

; FRANÇA, ELTON J.

; BONECKER, CLAUDIA C.

; MARCOLIN, CATARINA R.

; MELO JÚNIOR, MAURO DE

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2021, Volume 93 N. 2 elocation e20190991

Abstract: En | Text: En | PDF: En

Abstract The accuracy of traditional methods to sample planktonic microcrustaceans depends on two assumptions: that organisms are alive during sampling and that all carcasses can be identified despite their degradation state, but fresh carcasses are not easy to distinguish by traditional methods. Previous studies about mortality have shown that neglecting dead organisms can provide biased ecological information. Thus, our objective was to determine the mortality rate and the proportion of dead microcrustacean in three tropical reservoirs. Sampling was carried out in 12 stations during two periods. The proportion of dead organisms was verified using aniline blue and it varied between 0.6% and 90.6%. The carcass decomposition period varied between 3 to 16 days and microcrustaceans mortality rate varied between 0.005 and 0.314 d-1. Traditional preservation techniques with formalin do not significantly overestimate species abundance. However, these values should not be disregarded, because corrected (disregarding organisms that were dead) and formalin-preserved abundances were correlated with distinct limnological descriptors. Therefore, the traditional formalin preservation technique could provide misleading ecological interpretations. Other studies over larger temporal scales in addition to experiments to evaluate the effects of viruses, parasitism and the toxic effects of cyanobacteria on zooplankton would enlighten mortality rate patterns in freshwater ecosystems.

https://doi.org/10.1590/0001-3765202120190991 558 downloads

Epidemiologia e desfecho dos pacientes de alto risco cirúrgico admitidos em unidades de terapia intensiva no Brasil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Silva Júnior, João Manoel

; Chaves, Renato Carneiro de Freitas

; Corrêa, Thiago Domingos

; Assunção, Murillo Santucci Cesar de

; Katayama, Henrique Tadashi

; Bosso, Fabio Eduardo

; Amendola, Cristina Prata

; Serpa Neto, Ary

; Malbouisson, Luiz Marcelo Sá

; Oliveira, Neymar Elias de

; Veiga, Viviane Cordeiro

; Rojas, Salomón Soriano Ordinola

; Postalli, Natalia Fioravante

; Alvarisa, Thais Kawagoe

; Lucena, Bruno Melo Nobrega de

; Oliveira, Raphael Augusto Gomes de

; Sanches, Luciana Coelho

; Silva, Ulysses Vasconcellos de Andrade e

; Nassar Junior, Antonio Paulo

; Réa-Neto, Álvaro

; Amaral, Alexandre

; Teles, José Mário

; Freitas, Flávio Geraldo Rezende de

; Bafi, Antônio Tonete

; Pacheco, Eduardo Souza

; Ramos, Fernando José

; Vieira Júnior, José Mauro

; Pereira, Maria Augusta Santos Rahe

; Schwerz, Fábio Sartori

; Menezes, Giovanna Padoa de

; Magalhães, Danielle Dourado

; Castro, Cristine Pilati Pileggi

; Henrich, Sabrina Frighetto

; Toledo, Diogo Oliveira

; Parra, Bruna Fernanda Camargo Silva

; Dias, Fernando Suparregui

; Zerman, Luiza

; Formolo, Fernanda

; Nobrega, Marciano de Sousa

; Piras, Claudio

; Piras, Stéphanie de Barros

; Conti, Rodrigo

; Bittencourt, Paulo Lisboa

; D’Oliveira, Ricardo Azevedo Cruz

; Estrela, André Ricardo de Oliveira

; Oliveira, Mirella Cristine de

; Reese, Fernanda Baeumle

; Motta Júnior, Jarbas da Silva

; Câmara, Bruna Martins Dzivielevski da

; David-João, Paula Geraldes

; Tannous, Luana Alves

; Chaiben, Viviane Bernardes de Oliveira

; Miranda, Lorena Macedo Araújo

; Brasil, José Arthur dos Santos

; Deucher, Rafael Alexandre de Oliveira

; Ferreira, Marcos Henrique Borges

; Vilela, Denner Luiz

; Almeida, Guilherme Cincinato de

; Nedel, Wagner Luis

; Passos, Matheus Golenia dos

; Marin, Luiz Gustavo

; Oliveira Filho, Wilson de

; Coutinho, Raoni Machado

; Oliveira, Michele Cristina Lima de

; Friedman, Gilberto

; Meregalli, André

; Höher, Jorge Amilton

; Soares, Afonso José Celente

; Lobo, Suzana Margareth Ajeje

Revista Brasileira de Terapia Intensiva

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2020, Volume 32 N. 1 Pages 17 - 27

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Objetivo: Definir o perfil epidemiológico e os principais determinantes de morbimortalidade dos pacientes cirúrgicos não cardíacos de alto risco no Brasil. Métodos: Estudo prospectivo, observacional e multicêntrico. Todos os pacientes cirúrgicos não cardíacos admitidos nas unidades de terapia intensiva, ou seja, considerados de alto risco, no período de 1 mês, foram avaliados e acompanhados diariamente por, no máximo, 7 dias na unidade de terapia intensiva, para determinação de complicações. As taxas de mortalidade em 28 dias de pós-operatório, na unidade de terapia intensiva e hospitalar foram avaliadas. Resultados: Participaram 29 unidades de terapia intensiva onde foram realizadas cirurgias em 25.500 pacientes, dos quais 904 (3,5%) de alto risco (intervalo de confiança de 95% - IC95% 3,3% - 3,8%), tendo sido incluídos no estudo. Dos pacientes envolvidos, 48,3% eram de unidades de terapia intensiva privadas e 51,7% de públicas. O tempo de internação na unidade de terapia intensiva foi de 2,0 (1,0 - 4,0) dias e hospitalar de 9,5 (5,4 - 18,6) dias. As taxas de complicações foram 29,9% (IC95% 26,4 - 33,7) e mortalidade em 28 dias pós-cirurgia 9,6% (IC95% 7,4 - 12,1). Os fatores independentes de risco para complicações foram Simplified Acute Physiology Score 3 (SAPS 3; razão de chance − RC = 1,02; IC95% 1,01 - 1,03) e Sequential Organ Failure Assessment Score (SOFA) da admissão na unidade de terapia intensiva (RC =1,17; IC95% 1,09 - 1,25), tempo de cirurgia (RC = 1,001; IC95% 1,000 - 1,002) e cirurgias de emergências (RC = 1,93; IC95% 1,10 - 3,38). Em adição, foram associados com mortalidade em 28 dias idade (RC = 1,032; IC95% 1,011 - 1,052) SAPS 3 (RC = 1,041; IC95% 1,107 - 1,279), SOFA (RC = 1,175; IC95% 1,069 - 1,292) e cirurgias emergenciais (RC = 2,509; IC95% 1,040 - 6,051). Conclusão: Pacientes com escores prognósticos mais elevados, idosos, tempo cirúrgico e cirurgias emergenciais estiveram fortemente associados a maior mortalidade em 28 dias e mais complicações durante permanência em unidade de terapia intensiva.

ABSTRACT Objective: To define the epidemiological profile and the main determinants of morbidity and mortality in noncardiac high surgical risk patients in Brazil. Methods: This was a prospective, observational and multicenter study. All noncardiac surgical patients admitted to intensive care units, i.e., those considered high risk, within a 1-month period were evaluated and monitored daily for a maximum of 7 days in the intensive care unit to determine complications. The 28-day postoperative, intensive care unit and hospital mortality rates were evaluated. Results: Twenty-nine intensive care units participated in the study. Surgeries were performed in 25,500 patients, of whom 904 (3.5%) were high-risk (95% confidence interval - 95%CI 3.3% - 3.8%) and were included in the study. Of the participating patients, 48.3% were from private intensive care units, and 51.7% were from public intensive care units. The length of stay in the intensive care unit was 2.0 (1.0 - 4.0) days, and the length of hospital stay was 9.5 (5.4 - 18.6) days. The complication rate was 29.9% (95%CI 26.4 - 33.7), and the 28-day postoperative mortality rate was 9.6% (95%CI 7.4 - 12.1). The independent risk factors for complications were the Simplified Acute Physiology Score 3 (SAPS 3; odds ratio - OR = 1.02; 95%CI 1.01 - 1.03) and Sequential Organ Failure Assessment Score (SOFA) on admission to the intensive care unit (OR = 1.17; 95%CI 1.09 - 1.25), surgical time (OR = 1.001, 95%CI 1.000 - 1.002) and emergency surgeries (OR = 1.93, 95%CI, 1.10 - 3.38). In addition, there were associations with 28-day mortality (OR = 1.032; 95%CI 1.011 - 1.052), SAPS 3 (OR = 1.041; 95%CI 1.107 - 1.279), SOFA (OR = 1.175, 95%CI 1.069 - 1.292) and emergency surgeries (OR = 2.509; 95%CI 1.040 - 6.051). Conclusion: Higher prognostic scores, elderly patients, longer surgical times and emergency surgeries were strongly associated with higher 28-day mortality and more complications during the intensive care unit stay.

https://doi.org/10.5935/0103-507x.20200005 1048 downloads

Distribution of planktonic microcrustaceans (Cladocera and Copepoda) in lentic and lotic environments from the semiarid region in northeastern Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Diniz, Leidiane P.

; Morais Júnior, Cláudio S. de

; Medeiros, Ittalo L.S.

; Silva, Alef J. da

; Araújo, Alan P.

; Silva, Tâmara A.

; Melo Júnior, Mauro de

Iheringia. Série Zoologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2020, Volume 110 elocation e2020002

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O presente estudo objetivou inventariar a biodiversidade de microcrustáceos planctônicos (Cladocera e Copepoda) em 44 mananciais da região semiárida do Brazil, ampliando o conhecimento da comunidade zooplanctônica desta região, incluindo as espécies fitófilas. Os organismos foram coletados de modo não sistemático entre 2011 e 2017, nos estados do Rio Grande do Norte, Pernambuco, Ceará e Paraíba. Um total de 60 espécies de microcrustáceos planctônicos foram identificadas, sendo 52 de cladóceros e oito de copépodes. A bacia que apresentou maior riqueza foi a do rio Pajeú com 41 espécies. Mesmo assim, o número extrapolado de espécies mostra tendência de aumento para essa bacia. A composição dos gêneros foi diferente entre as bacias hidrográficas, sendo a bacia do Moxotó (Pernambuco) isolada das demais, talvez porque nesta bacia as lagoas foram o único tipo de ambiente amostrado. Os padrões de riqueza e de abundância se mostraram mais elevados para as bacias ondem a amostragem foi realizada principalmente em ambientes lênticos, como a do Pajeú e do Moxotó. Inventários de microcrustáceos e estudos de longa duração precisam ser maximizados para ampliação do conhecimento da biodiversidade dos ecossistemas aquáticos continentais da região semiárida brasileira.

Abstract The present study aimed to inventory the biodiversity of planktonic microcrustaceans (Cladocera and Copepoda) in 44 environments from the semiarid region of Brazil, increasing the knowledge about zooplankton community, including phytophilous species. Between 2011 and 2017, organisms were collected in a non - systematic way in the states of Rio Grande do Norte, Pernambuco, Ceará and Paraíba. A total of 60 species of planktonic microcrustaceans were identified, of which 52 were cladocerans and eight were copepods. The basin that presented the highest richness was Pajeú River with 41 species. Nevertheless, the extrapolated number of species shows an increasing tendency for this basin. The genus composition was different between the basins, with Moxotó basin (Pernambuco) being isolated from the others, probably since lagoons were the only type of environment sampled in this basin. Richness and abundance patterns were higher for the basins where sampling was mainly performed in lentic environments, such as Pajeú and Moxotó. Microcrustacean inventories and long-term studies need to be conducted more frequently to better understand the biodiversity of continental aquatic ecosystems in the semiarid region of Brazil.

https://doi.org/10.1590/1678-4766e2020002 1570 downloads

Taxas longitudinais de retenção e evasão: uma metodologia para estudo da trajetória dos estudantes na educação superior
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Lima Junior, Paulo

; Bisinoto, Cynthia

; Melo, Nilce Santos de

; Rabelo, Mauro

Ensaio: Avaliação e Políticas Públicas em Educação

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2019, Volume 27 N. 102 Pages 157 - 178

Abstract: Pt En Es | Text: Pt En Es | PDF: Pt | PDF: En | PDF: Es

Resumo Com a expansão do sistema federal de educação superior, a evasão e a retenção têm sido redescobertas pela pesquisa educacional. Neste artigo, avaliam-se criticamente as taxas empregadas pelo Ministério da Educação (MEC) e Tribunal de Contas da União (TCU) para controle e acompanhamento da trajetória dos alunos nas universidades brasileiras. Partindo dessa crítica, são propostos indicadores alternativos para quantificar a evasão e a retenção: a taxa longitudinal de evasão (TLE) e a taxa longitudinal de retenção (TLR). Esses indicadores foram testados com dados extraídos do registro acadêmico da Universidade de Brasília (UnB). Os resultados dessa instituição indicam, progressivamente, aumento da evasão e redução da retenção. Essas transformações podem estar relacionadas ao próprio processo de expansão do sistema educacional.

Abstract With the expansion of the higher education system, dropout and retention have been rediscovered by educational research. In this paper, we critically evaluate the rates used by the Brazilian MEC (Ministry of Education) and TCU (Court of Accounts) to control and follow students’ trajectory through universities. Drawing on this critique, alternative indicators are presented to quantify dropout and retention: the longitudinal dropout rate (LDR) and the longitudinal retention rate (LRR). These indicators were tested with data extracted from the academic record of Universidade de Brasília (UnB). The results indicate progressive increase in dropout and reduced retention. These transformations may be related to the process of expansion of the education system itself.

Resumen Con la expansión del sistema federal de educación superior, la evasión y la retención han sido redescubiertas por la investigación educativa. En este artículo, se evalúan críticamente las tasas empleadas por el Ministerio de Educación (MEC) y el Tribunal de Cuentas de la Unión (TCU) para control y acompañamiento de la trayectoria de los alumnos en las universidades brasileñas. A partir de esta crítica, se proponen indicadores alternativos para cuantificar la evasión y la retención: la tasa longitudinal de evasión (TLE) y la tasa longitudinal de retención (TLR). Estos indicadores se probaron con datos extraídos del registro académico de la Universidad de Brasilia (UnB). Los resultados de esa institución indican, progresivamente, el aumento de la evasión y reducción de la retención. Estas transformaciones pueden estar relacionadas con el propio proceso de expansión del sistema educativo.

https://doi.org/10.1590/s0104-40362018002701431 4002 downloads

Zooplankton associated with phytotelms and treefrogs in a neotropical forest
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Morais Júnior, Cláudio S. de

; Diniz, Leidiane P.

; Nascimento Filho, Silvano L. do

; Brito, Maiara T. da Silva

; Silva, Adilson de O.

; Moura, Geraldo J. B. de

; Melo Júnior, Mauro de

Iheringia. Série Zoologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2019, Volume 109 elocation e2019020

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Hipóteses sobre a distribuição das comunidades de zooplâncton em vários ecossistemas são muitas vezes limitadas pela falta de dados sobre os seus mecanismos de dispersão. Muitas pesquisas sobre a dispersão passiva mediada por anuros têm sido desenvolvidas em bromélias, porém com foco em ostrácodes e anelídeos. Nós investigamos o potencial para a forésia externa do zooplâncton (rotíferos, cladóceros, copépodes) por anuros arbóreos em fitotelmos de bromélias. Nossa hipótese é que (1) a composição do zooplâncton presente na pele dos anuros e nos fitotelmos das bromélias é semelhante, e que (2) anuros com maior tamanho corporal carregam mais propágulos de invertebrados. Filtramos a água presente nos fitotelmos (10 a 150 mL) usando uma rede de plâncton (45 µm) e fixamos os invertebrados em formol a 4%. Os anuros foram coletados ativamente em torno das bromélias (até ~1,5 m de raio) e depois lavados com água destilada. Quatorze espécies de rotíferos e três de crustáceos foram registradas na água dos fitotelmos e no corpo dos anuros. Capturamos 17 anuros variando de 2 a 5 cm de SLV e pertencentes a cinco espécies: Pristimantis ramagii (Boulenger, 1888), Dendropsophus decipiens (A. Lutz, 1925), Scinax auratus (Wied-Neuwied,1821), S. pachycrus (Miranda-Ribeiro, 1937) e S. x-signatus (Spix, 1824). Entre eles, 12 (70,59%) tinham propágulos aderidos ao corpo, dos quais a maioria (dez indivíduos) apresentou formas ativas de zooplâncton, enquanto apenas dois apresentaram ovos dormentes. Dez rotíferos e duas espécies de microcrustáceos foram registrados aderidas aos anuros. A composição zooplanctônica diferiu entre os fitotelmos e a pele de anuros e, o tamanho do corpo do dispersor não explicou o número de propágulos transportados, refutando ambas as hipóteses. No entanto, ressaltamos que evidências de dispersão foram encontradas devido ao alto número de propágulos aderidos aos anuros. Nosso estudo fornece evidências de que os anuros podem ser potenciais dispersores de formas ativas e inativas de zooplâncton em bromélias, através de forésia externa.

ABSTRACT Assumptions about the distribution of zooplankton communities in various ecosystems are often limited by lack of data on dispersal mechanisms. Many studies on frog-mediated passive dispersal have been developed in bromeliads, but they usually focus on ostracods and annelids. We investigated the potential for external phoresy of zooplankton (rotifers, cladocerans, copepods) by treefrogs in bromeliad phytotelms. Our hypotheses are that (1) zooplankton composition on frogs’ skin and in phytotelm tanks is similar, and (2) frogs with larger body size carry more propagules of these invertebrates. We filtered phytotelm water (10 to 150 mL) using plankton net (45 µm), and fixed invertebrates with 4% formalin. Frogs were actively collected in and around bromeliads (up to ~1.5 m radius) and then washed with distilled water. Fourteen species of rotifers and three of crustaceans were registered in phytotelm water and frog bodies. We captured 17 frogs with a snout-vent length (SVL) ranging from 2 to 5 cm and belonging to five species: Pristimantis ramagii (Boulenger, 1888), Dendropsophus decipiens (A. Lutz, 1925), Scinax auratus (Wied-Neuwied,1821), S. pachycrus (Miranda-Ribeiro, 1937) and S. x-signatus (Spix, 1824). Among them, 12 (70.59%) had propagules adhered to their bodies, of which the majority (ten individuals) had active zooplankton forms, while only two had dormant eggs. Ten rotifer and two microcrustacean species were recorded adhered to frogs. The zooplankton composition differed between phytotelms and anuran skin, and frog body size does not explain the number of propagules carried, refuting both hypotheses. However, evidence of dispersal was found due to the high number of propagules adhered to anurans. Our study provides evidence that frogs may be potential dispersers of dormant and active forms of zooplankton in bromeliads, through external phoresy.

https://doi.org/10.1590/1678-4766e2019020 1550 downloads

A mata ripária influencia a composição e estrutura da comunidade zooplanctônica de poças temporárias?
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Medeiros, Íttalo L. S.

; Santos, Felipe A. dos

; El-Deir, Ana C. A.

; Melo Júnior, Mauro de

Iheringia. Série Zoologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2019, Volume 109 elocation e2019037

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Poças temporárias são importantes ampliadores da biodiversidade local, sobretudo em áreas florestadas estacionais. Alterações na cobertura vegetal ao longo das margens desses corpos hídricos podem alterar a composição e estrutura da sua comunidade zooplanctônica. Nesse sentindo, testamos a hipótese de que a presença de mata ripária altera a estrutura da comunidade zooplanctônica encontrada em poças temporárias. Foram filtrados até 10 litros de água, em malha de 20 µm, em poças com (CM) e sem mata ripária (SM), e coletados dados de clorofila-α e as variáveis limnológicas. Todos os espécimes foram identificados com microscópio óptico em câmara de Sedgewick-Rafter. Os dados foram tratados quanto à composição e estrutura da comunidade (riqueza, frequência, abundância relativa e biomassa), sendo realizadas análises de diversidade (Série de Hill), de correspondência canônica (ACC) e de espécies indicadoras (IndVal). Diferenças significativas foram observadas entre as variáveis limnológicas nas duas condições, principalmente nos parâmetros de turbidez, sólidos totais dissolvidos e clorofila-α, as quais mostraram maior influência sobre a estrutura da comunidade. Embora a diversidade e biomassa de rotíferos tenham sido superiores nas poças SM, a riqueza e a biomassa de cladóceros foi superior nas poças CM. A análise de espécies indicadoras demonstrou que alguns rotíferos e microcrustáceos, como Ceriodaphinia cornuta G. O. Sars, 1885, Notodiaptomus cearenses Wright, 1936 e Ostracoda morf.2 são indicativos de poças CM, enquanto outras espécies indicam ambientes com maior turbidez (poças CM), por exemplo Polyarthra vulgaris Carlin, 1943 e Diaphanosoma spinulosum Herbst, 1975. Os resultados sugerem uma diferenciação expressiva entre os ambientes com e sem vegetação ripária, mostrando sua importância na estrutura da comunidade, reforçando a necessidade de medidas protetivas para ambientes temporários, visto que são essenciais para a manutenção da biodiversidade local.

ABSTRACT Temporary ponds are important magnifiers of local biodiversity, especially in seasonal forested areas. Changes in the vegetation cover may along the banks of these water bodies alter the composition and structure of the intrinsic zooplankton community. Thus, we evaluate the hypothesis that the presence of riparian vegetation changes the structure of the zooplankton community found in temporary pools. A volume up to ten litres of water, collected from pools with riparian vegetation (CM) and lacking riparian vegetation (SM), was filtered using a 20 μm-mesh size sieve. Data on chlorophyll-α and some limnological variables were also collected. All specimens were identified using a Sedgewick-Rafter chamber under an optical microscope. Moreover, the data were treated regarding the composition and structure of the community (richness, frequency of occurrence, abundance and biomass) via performing a diversity analysis (Hill Series), canonical correspondence analysis (CCA) and an indicator species analysis (IndVal). There were observed significant differences for the limnological variables in both conditions, especially for turbidity, total dissolved solids and chlorophyll-α, which demonstrated greater influence on the community structure. Although the diversity and biomass of rotifers were higher in the SM pools, the richness and biomass of cladocerans showed a higher value in the CM pools. The indicator species analysis demonstrated that some rotifers and microcrustaceans, as Ceriodaphnia cornuta G. O. Sars, 1885, Notodiaptomus cearensis Wright, 1936 and Ostracoda morf.2 are indicative of CM pools, whereas other species indicate environments with higher turbidity (SM pools), for example Polyarthra vulgaris Carlin, 1943 and Diaphanossoma spinulosum Herbst, 1975. In conclusion these results suggest an impressive distinction between riparian vegetation environment and that without such vegetation, which point to the importance of the former environment to the community structure. This reinforces the need for protective policies regarding temporary environments, since they are essential environments for the maintenance of local biodiversity.

https://doi.org/10.1590/1678-4766e2019037 1030 downloads

10.

Small-scale distribution of the mesozooplankton in a tropical insular system
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Campelo, Renata Polyana de Santana

; Diaz, Xiomara Franchesca Garcia

; Santos, Gleice

; Melo, Pedro Augusto Mendes de Castro

; de Melo Junior, Mauro

; Figueiredo, Lucas Guedes Pereira

; Silva, Andrea Pinto

; Bezerra, Luis Ernesto Arruda

; Montes, Manuel de Jesus Flores

; Neumann-Leitão, Sigrid

Brazilian Journal of Oceanography

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2018, Volume 66 N. 1 Pages 15 - 29

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Neste presente trabalho, são apresentadas as flutuações espacial e sazonal da abundância e diversidade do mesozooplâncton, com especial atenção para assembleia de copépodes da área costeira do Arquipélago de Fernando de Noronha (AFN) (3°50'24''S and 32°24'48''W). A amostragem foi realizada durante as estações seca e chuvosa de dois anos consecutivos (julho e dezembro de 2013) e (junho e novembro de 2014). Um total de 37 taxa do mesozooplâncton foram registrados, sendo os copépodes o grupo mais diversificado (15 taxa). A Subclasse Copepoda dominou em ambos os períodos amostrados, com valores de abundância relativa equivalentes a 53% e 86%, respectivamente, nas estações seca e chuvosa. As espécies consideradas abundantes foram: Calanopia americana, Undinula vulgaris, Oithona plumifera e Corycaeus speciosus. A estação chuvosa favoreceu um aumento significativo na abundância do mesozooplâncton e copépodes. No entanto, um baixo valor do índice de diversidade de Shannon-Wiener foi observado para este mesmo período sazonal. Isso foi explicado pelo domínio das espécies C. americana e U. vulgaris na área estudada. Diferença espacial não foi verificada. A assembleia de copépodes apresentou um maior número de espécies consideradas carnívoro-predador de grande importância na teia trófica pelágica, indicadoras de condições oligotróficas e componente de grande porção dos itens alimentares dos peixes. Assim, sugerimos que a área costeira do Arquipélago de Fernando de Noronha é caracterizada por uma comunidade do mesozooplâncton espacialmente homogênea, onde as mudanças observadas estão principalmente relacionadas ao fator sazonal.

Abstract In the present work, spatial and seasonal fluctuations of the abundance and diversity of mesozooplankton are presented, with special attention being given to copepod assemblages from coastal area of the Fernando de Noronha Archipelago (FNA) (3°50'24''S and 32°24'48''W). Sampling was carried out during the dry and rainy seasons of two consecutive years (July and December 2013) and (June and November 2014). A total of 37 mesozooplankton taxa were recorded, being the copepods the most diversified group (15 taxa). The Subclass Copepoda dominated in both periods sampled, comprising 53% and 86% of the total abundance in the dry and rainy season respectively. The species considered abundant were: Calanopia americana, Undinula vulgaris, Oithona plumifera and Corycaeus speciosus. The rainy season favored a significant increase in the abundance of mesozooplankton and copepods. However, a low value of the Shannon-Wiener diversity index was observed in this same seasonal period. This was explained by the dominance of the species C. americana and U. vulgaris in the studied area. Spatial differences have not been verified. The copepod assemblages was composed mostly by species considered as predator-carnivours of greater importance on the pelagic trophic web, indicators of oligotrophic conditions and components of a major portion of fish food items. Thus, we suggest that a spatially homogeneous mesozooplankton community characterizes the coastal area of Fernando de Noronha Archipelago with variations related mainly to the seasonal factor.

https://doi.org/10.1590/s1679-87592018147306601 1243 downloads

11.

Composition of decapod larvae in a northeastern Brazilian estuarine inlet over a full tidal cycle
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

de Melo Júnior, Mauro

; Mendes de Castro Melo, Pedro Augusto

; Nogueira Paranaguá, Maryse

; Neumann-Leitão, Sigrid

; Schwamborn, Ralf

Latin american journal of aquatic research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

may 2016, Volume 44 N. 2 Pages 401 - 410

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Composition changes of decapod larvae in a neotropical estuarine inlet (Catuama inlet, northeast Brazilian coast) were studied in a complete tidal cycle in August 2001. Sampling was performed at three stations at two or three depth levels that were located along a transect across the inlet. The collections were performed in 3 h intervals under a neap tide regime. Samples were taken with a pump and the water was filtered through 300 μm plankton net. 27 planktonic decapod taxa were identified, which included the first larval stages of the coastal and oceanic shrimps Lucifer faxoni and Acetes americanus, besides larvae of the estuarine and coastal decapods Pinnixa spp., Uca spp., Petrolisthes armatus, Upogebia spp. and Alpheidae, which were the most frequent taxa. All of the planktonic larval stages were observed for most of the decapods, suggesting that the probable exportation from the estuary is to the inner adjacent shelf area, instead of the outer oceanic area.

Se analizaron los cambios en la composición de las larvas de decápodos en la desembocadura de un estuario neotropical durante un ciclo completo de marea en agosto de 2001. Las colectas se realizaron en 3 estaciones, en dos o tres profundidades, localizadas en una transecta interior. Los muestreos se realizaron a intervalos de 3 h durante la marea de cuadratura. Las muestras se colectaron con una bomba y se filtraron a través de una red de plancton (300 μm). Se identificaron 27 taxa de larvas de decápodos, incluyendo el primer estadio larval de los camarones costeros y oceánicos Lucifer faxoni y Acetes americanus, seguidos de las larvas de los decápodos estuarinos y costeros Pinnixa spp., Uca spp., Petrolisthes armatus, Upogebia spp. y Alpheidae, que fueron los taxa más frecuentes. Se observaron todos de los estadios larvales de la mayoría de los decápodos, lo que sugiere que probablemente la exportación del estuario es hacia el área interior de la plataforma adyacente, en vez de hacia el área oceánica exterior.

https://doi.org/10.3856/vol44-issue2-fulltext-21 692 downloads

12.

Neurofibromatosis: part 2 – clinical management
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Batista, Pollyanna Barros

; Bertollo, Eny Maria Goloni

; Costa, Danielle de Souza

; Eliam, Lucas

; Cunha, Karin Soares Gonçalves

; Cunha-Melo, José Renan

; Darrigo Junior, Luiz Guilherme

; Geller, Mauro

; Gianordoli-Nascimento, Ingrid Faria

; Madeira, Luciana Gonçalves

; Mendes, Hérika Martins

; Miranda, Débora Marques de

; Mata-Machado, Nikolas Andre

; Morato, Eric Grossi

; Pavarino, Érika Cristina

; Pereira, Luciana Baptista

; Rezende, Nilton Alves de

; Rodrigues, Luíza de Oliveira

; Sette, Jorge Bezerra Cavalcanti

; Silva, Carla Menezes da

; Souza, Juliana Ferreira de

; Souza, Márcio Leandro Ribeiro de

; Martins, Aline Stangherlin

; Valadares, Eugênia Ribeiro

; Vidigal, Paula Vieira Teixeira

; Waisberg, Vanessa

; Waisberg, Yehuda

; Rodrigues, Luiz Oswaldo Carneiro

Arquivos de Neuro-Psiquiatria

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2015, Volume 73 N. 6 Pages 531 - 543

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

A primeira parte desta diretriz abordou o diagnóstico diferencial das neurofibromatoses (NF): neurofibromatose do tipo 1 (NF1), neurofibromatose do tipo 2 (NF2) e schwannomatose (SCH). As NF compartilham algumas características, como a origem neural dos tumores e sinais cutâneos, e afetam cerca de 80 mil brasileiros. O aumento do conhecimento científico sobre as NF tem permitido melhor manejo clínico e redução da morbidade das complicações, resultando em melhor qualidade de vida para os pacientes com NF. A maioria dos médicos é capaz de realizar o diagnóstico das NF, mas a variedade de manifestações clínicas e a dificuldade de se prever o surgimento e a gravidade de complicações, torna o manejo da NF um desafio para o clínico e envolve diferentes especialistas para o tratamento adequado e aconselhamento genético, especialmente a NF2 e a SCH. O presente texto sugere algumas orientações para o acompanhamento dos portadores de NF, com ênfase na NF1.

Part 1 of this guideline addressed the differential diagnosis of the neurofibromatoses (NF): neurofibromatosis type 1 (NF1), neurofibromatosis type 2 (NF2) and schwannomatosis (SCH). NF shares some features such as the genetic origin of the neural tumors and cutaneous manifestations, and affects nearly 80 thousand Brazilians. Increasing scientific knowledge on NF has allowed better clinical management and reduced rate of complications and morbidity, resulting in higher quality of life for NF patients. Most medical doctors are able to perform NF diagnosis, but the wide range of clinical manifestations and the inability to predict the onset or severity of new features, consequences, or complications make NF management a real clinical challenge, requiring the support of different specialists for proper treatment and genetic counseling, especially in NF2 and SCH. The present text suggests guidelines for the clinical management of NF, with emphasis on NF1.

https://doi.org/10.1590/0004-282X20150042 13090 downloads

13.

The first occurrence of the Order Mormonilloida (Copepoda) in the Tropical Southwest Atlantic Ocean
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

MELO, PEDRO AUGUSTO M.C.

; MELO JÚNIOR, MAURO DE

; ARAÚJO, MOACYR

; NEUMANN-LEITÃO, SIGRID

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2015, Volume 87 N. 1 Pages 233 - 237

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Esta nota é o primeiro registro da ocorrência de Mormonilla phasma(Copepoda) no Sudoeste do Oceano Atlântico Tropical. Indivíduos fêmeas foram encontrados em águas superficiais na quebra da plataforma do estado do Rio Grande do Norte (Nordeste do Brasil) e entre 60 e 100 m de profundidade, na camada epipelágica ao largo do Arquipélago de São Pedro e São Paulo (Atlântico Equatorial). Este achado estende o limite vertical da espécie.

This communication is the first report of the occurrence of the order Mormonilloida (Mormonilla phasma) in the tropical Southwestern Atlantic Ocean. Female individuals were found in surface waters from the shelf break state of Rio Grande do Norte (Northeastern Brazil) and between depths of 60 and 100 m in the epipelagic layer around the St. Peter and St. Paul Archipelago (equatorial Atlantic). This finding extends the vertical limits for this species.

https://doi.org/10.1590/0001-3765201520130394 2808 downloads

14.

Prediction of soil shear strength in agricultural and natural environments of the Brazilian Cerrado
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Silva, Reginaldo Barboza da

; Dias Junior, Moacir de Souza

; Iori, Piero

; Silva, Francisca Alcivânia de Melo

; Folle, Sergio Mauro

; Franz, Claudio Alberto Bento

; Souza, Zigomar Menezes de

Pesquisa Agropecuária Brasileira

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jan 2015, Volume 50 N. 1 Pages 82 - 91

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O objetivo deste trabalho foi desenvolver modelos uni e multivariados para estimar a tensão de cisalhamento máxima (τmáx), sob diferentes tensões normais (σn), conteúdos de água (U) e manejos do solo. O estudo foi realizado em Latossolo Vermelho distrófico sob Cerrado (área controle) e sob os sistemas de plantio direto e convencional. Amostras indeformadas foram retiradas na camada de 0,00-0,05 m e submetidas a U e σn crescentes, durante ensaios de resistência ao cisalhamento. Os modelos uni e multivariados - respectivamente τmáx=10(a+bU) e τmáx=10(a+bU+cσn) - foram significativos nos três sistemas de manejo do solo avaliados e explicam satisfatoriamente a relação entre U, σn e τmáx. O solo sob Cerrado apresenta a maior tensão de cisalhamento (τ) estimada com uso do modelo univariado, independentemente do conteúdo de água do solo, enquanto o solo sob manejo convencional apresenta os maiores valores com o modelo multivariado, os quais estão associados a menores conteúdos de água nos limites de consistência do solo, nesse sistema de manejo.

The objective of this work was to develop uni- and multivariate models to predict maximum soil shear strength (τmax) under different normal stresses (σn), water contents (U), and soil managements. The study was carried out in a Rhodic Haplustox under Cerrado (control area) and under no-tillage and conventional tillage systems. Undisturbed soil samples were taken in the 0.00-0.05 m layer and subjected to increasing U and σn, in shear strength tests. The uni- and multivariate models - respectively τmax=10(a+bU) and τmax=10(a+bU+cσn) - were significant in all three soil management systems evaluated and they satisfactorily explain the relationship between U, σn, and τmax. The soil under Cerrado has the highest shear strength (τ) estimated with the univariate model, regardless of the soil water content, whereas the soil under conventional tillage shows the highest values with the multivariate model, which were associated to the lowest water contents at the soil consistency limits in this management system.

https://doi.org/10.1590/S0100-204X2015000100009 4070 downloads

15.

Copepod distribution and production in a Mid-Atlantic Ridge archipelago
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

MELO, PEDRO A.M.C.

; MELO JÚNIOR, MAURO DE

; MACÊDO, SILVIO J. DE

; ARAUJO, MOACYR

; NEUMANN-LEITÃO, SIGRID

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2014, Volume 86 N. 4 Pages 1719 - 1733

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

O arquipélago de São Pedro e São Paulo (ASPSP) está localizado próximo ao Equador, no oceano Atlântico. O objetivo deste estudo foi avaliar variações espaciais nos padrões de abundância da comunidade de Copepoda, e da biomassa e produção das três espécies de Calanoida mais abundantes no ASPSP. Amostras de plâncton foram coletadas com rede com 300 µm de abertura de malha, ao longo de quatro transectos (norte, leste, sul e oeste do ASPSP), com quatro estações cada. Todos os transectos exibiram uma tendência de redução da densidade dos Copepoda com o aumento da distância do ASPSP, provado estatisticamente para o Norte. A densidade variou de 3,33 a 182,18 ind.m−3, e diferenças também foram observadas entre o primeiro perímetro (primeira faixa de distância circular) e os demais. A biomassa total variou de 15,25 a 524,50 10−3 mg C m−3e a produção de 1,19 a 22,04 mg C m−3d−1. A biomassa e produção de Undinula vulgaris (Dana, 1849),Acrocalanus longicornis Giesbrecht, 1888 eCalocalanus pavo (Dana, 1849) apresentaram diferenças entre alguns transectos. Uma tendência de declínio da biodiversidade e produção com o aumento da distância do arquipélago foi observada, sugerindo que pequenas feições como o ASPSP podem afetar a comunidade em áreas oceânicas oligotróficas tropicais.

The Saint Peter and Saint Paul Archipelago (SPSPA) are located close to the Equator in the Atlantic Ocean. The aim of this study was to assess the spatial variations in the copepod community abundance, and the biomass and production patterns of the three most abundant calanoid species in the SPSPA. Plankton samples were collected with a 300 µm mesh size net along four transects (north, east, south and west of the SPSPA), with four stations plotted in each transect. All transects exhibited a tendency toward a decrease in copepod density with increasing distance from the SPSPA, statistically proved in the North. Density varied from 3.33 to 182.18 ind.m−3, and differences were also found between the first perimeter (first circular distance band) and the others. The total biomass varied from 15.25 to 524.50 10−3 mg C m−3 and production from 1.19 to 22.04 10−3 mg C m−3d−1. The biomass and production of Undinula vulgaris (Dana, 1849), Acrocalanus longicornis Giesbrecht, 1888 andCalocalanus pavo (Dana, 1849) showed differences between some transects. A trend of declining biodiversity and production with increasing distance from archipelago was observed, suggesting that even small features like the SPSPA can affect the copepod community in tropical oligotrophic oceanic areas.

https://doi.org/10.1590/0001-3765201420130395 2731 downloads

Showing

itens per page

Page of 2 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »