Limpar
702 resultados

Acesso aberto

Tipo do recurso

Ano de criação

Produção nacional

Revisado por pares

Áreas

Idioma

Editores

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Maria Betânia G. Souza, Cristiane F. A. Barros, Francisco Antônio Rodrigues Barbosa, Éva Hajnal, Judit Padisák,

... in the deepest natural lake in Brazil, Dom Helvécio, and to sort species into the list of ... day) contributed to replacement of species in Dom Helvécio Lake. Stability of stratification, water chemistry, and composition ... and LO. Results suggest that phytoplankton in Dom Helvécio Lake was shaped by seasonal and daily changes ...

Tópico(s): Marine and coastal ecosystems

2008 - Springer Science+Business Media | Hydrobiologia

Artigo Acesso aberto Revisado por pares

Luciana Gomes Barbosa, Francisco Antônio Rodrigues Barbosa, Gabrielle Joanne Medeiros Araujo, Carlos Eduardo de Mattos Bicudo,

... natural lakes, Carioca (small and shallow) and Dom Helvécio (large and deep), located in Rio Doce State ... Minas Gerais State, southeast Brazil.At Lake Dom Helvécio, the extensive banks of aquatic macrophytes, the lake' ...

Tópico(s): Marine and coastal ecosystems

2013 - | Limnetica

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

José Fernandes Bezerra‐Neto, Ludmila Silva Brighenti, Nelson Azevedo Santos Teixeira de Mello, Ricardo Motta Pinto‐Coelho,

... conducted in May and June-2008 in Dom Helvécio and Carioca lakes, at the Parque Estadual do ... Chaoborus could be easily monitored in the Dom Helvécio Lake and the Nado reservoir. However, this behavior ...

Tópico(s): Fish Biology and Ecology Studies

2012 - Associação Brasileira de Limnologia | Acta Limnologica Brasiliensia

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

PM. Maia-Barbosa, L. G. Barbosa, SL. Brito, Francisco García, CFA Barros, M.B. Gonçalves Souza, Nina Garbellini de Mello, AS. Guimarães, Francisco Antônio Rodrigues Barbosa,

... in physical, chemical and biological features of Dom Helvécio Lake (South-East Brazil), this study compares previous ...

Tópico(s): Aquatic Ecosystems and Biodiversity

2010 - Instituto Internacional de Ecologia (Brazil) | Brazilian Journal of Biology

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

PM. Maia-Barbosa, RS. Peixoto, AS. Guimarães,

... present study was carried out in Lake Dom Helvécio, in the state of Minas Gerais, with two ... which 130 are new records for Lake Dom Helvécio. One hundred and eighty-four species were identified ...

Tópico(s): Aquatic Ecosystems and Biodiversity

2008 - Instituto Internacional de Ecologia (Brazil) | Brazilian Journal of Biology

Artigo Revisado por pares

D. L. Hopkins, Alexander H. Purcell,

... Oseias R. Feitosa-Junior, Patrícia Isabela Silva Pessoa, Helvécio Della Coletta-Filho, Alessandra Alves de Souza, Marcos ... A. R. de Lara, Rodrigo P. P. Almeida, Helvécio D. Coletta-Filho, and João R. S. Lopes2 ...

Tópico(s): Plant Pathogenic Bacteria Studies

2002 - American Phytopathological Society | Plant Disease

Artigo Acesso aberto

Osamu Mitamura, Yatsuka Saijô, Kozo Hino,

... the euphotic zone of three tropical lakes, Dom Helvécio, Jacaré and Carioca, located in the Rio Doce ... turnover time at surface waters in Lakes Dom Helvecio, Jacaré and Carioca was calculated, respectively, as 6, ...

Tópico(s): Wastewater Treatment and Nitrogen Removal

1995 - | Japanese Journal of Limnology (Rikusuigaku Zasshi)

Artigo

Osamu Mitamura, Yatsuka Saijô, Kozo Hino, Francisco Antônio Rodrigues Barbosa,

... out in the euphotic layer of Lakes Dom Helvecio, Jacare and Carioca, located in the Rio Doce ... N.m -2 .day -1 in Lake Dom Helvecio, 150 and 73 mg C.m -2 .day - ...

Tópico(s): Water Quality and Pollution Assessment

1995 - Schweizerbart science publishers | Archiv für Hydrobiologie

Artigo Acesso aberto Brasil Produção Nacional

Kozo Hino, José Galízia Tundisi, C. S. Reynolds,

... to occur in the metalimnion of Lake D. Helvecio, during a period of strong thermal stratification, at ...

Tópico(s): Aquatic Ecosystems and Biodiversity

1986 - | Japanese Journal of Limnology (Rikusuigaku Zasshi)

Artigo Acesso aberto

Myounghee Kang,

... for discriminating plankton from fish, in Lake Dom Helvecio of Brazil, is developed. The flow of data ...

Tópico(s): Fish Ecology and Management Studies

2012 - | Journal of the Korean society of Fisheries Technology

Artigo Brasil Produção Nacional Revisado por pares

Isao Ikusima, José Geraldo Gentil,

... and 17.1 m −2 in Lake Dom Helvecio, Lake Jacaré and Lake Carioca, respectively. The mean ... The mean leaf life‐span in Lake Dom Helvecio, Lake Jacaré and Lake Carioca was estimated to ... life‐span occurred in order from Lake Dom Helvecio to Lake Jacaré and Lake Carioca. The low ...

Tópico(s): Biological Control of Invasive Species

1993 - Springer Science+Business Media | Ecological Research

Artigo Brasil Produção Nacional Revisado por pares

Takako Matsumura Tundisi, José Galízia Tundisi,

Tópico(s): Fish biology, ecology, and behavior

1994 - Brazilian Academy of Sciences | Anais da Academia Brasileira de Ciências

Revisão Acesso aberto Brasil Produção Nacional Revisado por pares

Thiago Medeiros Zacaron, Mariana Leite Simões e Silva, Mirsiane Pascoal Costa, Dominique Mesquita e Silva, Allana Carvalho Silva, Ana Carolina Morais Apolônio, Rodrigo Luiz Fabri, Frederico Pittella, Helvécio Vinícius Antunes Rocha, Guilherme Diniz Tavares,

The evolution of respiratory diseases represents a considerable public health challenge, as they are among the leading causes of death worldwide. In this sense, in addition to the high prevalence of diseases such as asthma, chronic obstructive pulmonary disease, pneumonia, cystic fibrosis, and lung cancer, emerging respiratory diseases, particularly those caused by members of the coronavirus family, have contributed to a significant number of deaths on a global scale over the last two decades. Therefore, ...

Tópico(s): Cystic Fibrosis Research Advances

2023 - Multidisciplinary Digital Publishing Institute | Polymers

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Kercia Pinheiro Cruz, Beatriz Patricio, Vinícius C. Pires, Marina F. Amorim, Alan G. S. F. Pinho, Helenita Costa Quadros, Diana A. S. Dantas, Marcelo H. C. Chaves, Fábio Rocha Formiga, Helvécio Vinícius Antunes Rocha, Patrícia Sampaio Tavares Veras,

Leishmaniasis is a spectrum of neglected tropical diseases and its cutaneous form (CL) is characterized by papillary or ulcerated skin lesions that negatively impact patients' quality of life. Current CL treatments suffer limitations, such as severe side effects and high cost, making the search for new therapeutic alternatives an imperative. In this context, heat shock protein 90 (Hsp90) could present a novel therapeutic target, as evidence suggests that Hsp90 inhibitors, such as 17-Dimethylaminoethylamino- ...

Tópico(s): Heat shock proteins research

2021 - Frontiers Media | Frontiers in Chemistry

Artigo Acesso aberto Brasil Produção Nacional

Marina Faria Salomão, Luiza Ribeiro Gontijo, Luisa Abdo Ramos Nunes, Felipe Pueyo Magalhães, José Helvécio Kalil de Souza, Roberto Paolinelli de Castro,

Resumo Este estudo objetiva mostrar a importância dos princípios bioéticos de Beauchamp e Childress e reafirmá-los na prática médica a fim de diminuir os números exorbitantes de processos ético-profissionais impetrados por iatrogenia. Além disso, busca-se elucidar as fases do processo de modo a informar a comunidade médica sobre seu andamento. Para tal, realiza-se atualização bibliográfica pautada no Código de Ética Médica, no Código de Processo Ético-Profissional e em guias práticos e dinâmicos ...

Tópico(s): Patient Dignity and Privacy

2021 - Conselho Federal de Medicina | Revista Bioética

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Rosimeire Resende dos Santos, Ricardo Mathias Orlando, Zenilda de Lourdes Cardeal, Helvécio Costa Menezes,

Sample preparation assisted by a cooling system including solid phase microextraction (SPME) has received an increased interest in recent years. In this work, a new cold fiber (CF-SPME) system using thermoelectric cooling is proposed. The system consists of three thermoelectric coolers (Peltier), a heat sink, a recirculation module to dissipate the heat generated on the hot side, and an electric power source to generate the necessary voltage for the system. The Peltier keeps the SPME fiber cool during ...

Tópico(s): Analytical chemistry methods development

2021 - Elsevier BV | Food Control

Artigo Brasil Produção Nacional Revisado por pares

Débora Cristina Gonçalves, Vagner Tebaldi de Queiroz, Adílson Vidal Costa, Wilker Pinheiro Lima, Leônidas Leoni Belan, Willian Bucker Moraes, Natalia Lopes Pontes Iório, Helvécio Cardoso Corrêa Póvoa,

Fusarium wilt, whose etiological agent is the fungus Fusarium oxysporum f.sp. lycopersici (Fol), is one of the main diseases that limit tomato production. Tomato seed treatment can reduce pathogen infestation as well as protect seeds during seedling germination, emergence and initial development. The aim of this study was to evaluate the effect of seed treatment with natural products in order to reduce Fusarium wilt incidence in tomato seedlings. Origanum vulgare L. (Ovu) and Cinnamomum zeylanicum ( ...

Tópico(s): Insect Pest Control Strategies

2020 - Elsevier BV | Crop Protection

Artigo Revisado por pares

Eduardo da Cunha Richard, Gustavo Calderucio Duque Estrada, Jean‐Philippe Bechtold, Helvecio de Aguiar Duarte, Brígida Gusso Maioli, Antonio Henrique Araujo de Freitas, Kara E. Warner, Luis Henrique Melges Figueiredo,

ABSTRACT Fundão dam (Minas Gerais, Brazil) breached on 5 November 2015, releasing 50 million m³ of Fe ore tailings and dam materials into the upper Doce River system. The tailings travelled 670 km along the river system to the ocean. Starting on 17 November 2015, 6 days before the tailings reached the Doce River mouth, a water quality monitoring program with a daily sampling schedule was implemented by Samarco Mineração S.A. (Samarco) to assess the impacts on marine water and sediment quality. Between ...

Tópico(s): Tailings Management and Properties

2020 - Wiley | Integrated Environmental Assessment and Management

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Raimundo Homero Carvalho Neto, Antônio Brazil Viana Júnior, Antônio Fernandes Moron, Edward Araujo Júnior, Francisco Herlânio Costa Carvalho, Helvécio Neves Feitosa,

To evaluate the ability of the pubic arch angle (PAA) as measured by transperineal ultrasonography during labor to predict the delivery type and cephalic pole disengagement mode. The present prospective cross-sectional study included 221 women in singleton-gestational labor ≥ 37 weeks with cephalic fetuses who underwent PAA measurement using transperineal ultrasonography. These measurements were correlated with the delivery type, cephalic pole disengagement mode, and fetal and maternal characteristics. ...

Tópico(s): Pelvic floor disorders treatments

2020 - Thieme Medical Publishers (Germany) | Revista Brasileira Ginecologia e Obstetrícia

Artigo Brasil Produção Nacional Revisado por pares

Eduard F. Valenzuela, Fabiano Gomes Ferreira de Paula, Ana Paula C. Teixeira, Helvécio Costa Menezes, Zenilda de Lourdes Cardeal,

This research describes a solid-phase microextraction device using carbon nanomaterials supported on steel threads. The device was used to pre-concentrate and extract 24 pesticides in water. The carbon nanomaterials were obtained by a chemical vapor deposition (CVD) process, using methane and acetonitrile as carbon source. The different pesticides were separated, detected, and quantified using gas chromatography coupled to mass spectrometry (GC-MS). The system, optimized and validated in the laboratory, ...

Tópico(s): Adsorption and biosorption for pollutant removal

2020 - Elsevier BV | Talanta

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Helvécio Cardoso Corrêa Póvoa, Gabriela Ceccon Chianca, Natalia Lopes Pontes Iório,

This manuscript aims to highlight the risk of Ventilator-Associated Bacterial Pneumonia (VAP) in COVID-19 inpatients. The co-infection has the potential to worsen clinical condition and increase mortality in these patients, as well as to prolong and increase the costs of hospitalization. Preventing, identifying and treating early VAP can increase the chances of successful treatment in patients with COVID-19.

Tópico(s): Pneumonia and Respiratory Infections

2020 - Adis, Springer Healthcare | Infectious Diseases and Therapy

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Jefferson Rangel da Silva, Fausto Veiga de Alvarenga, Rodrigo Marcelli Boaretto, João Roberto Spotti Lopes, J. A. Quaggio, Helvécio Della Coletta-Filho, Dirceu Mattos,

Despite efforts of research to establish best nutrient management practices in HLB-affected citrus orchards, there are still doubts about the contribution of such strategies to minimizing losses caused by the disease in the citrus industry. We evaluated the effects of micronutrient (Zn, Mn, and/or Cu) supply and ‘Candidatus Liberibacter asiaticus’ (CLas) infection on physiological and growth traits of sweet orange trees (Citrus sinensis (L.) Osbeck)) to understand if enhanced micronutrient supply would ...

Tópico(s): Plant Pathogenic Bacteria Studies

2020 - Springer Science+Business Media | Tropical Plant Pathology

Revisão Brasil Produção Nacional Revisado por pares

Eduard F. Valenzuela, Helvécio Costa Menezes, Zenilda de Lourdes Cardeal,

Tópico(s): Pesticide and Herbicide Environmental Studies

2020 - Springer Science+Business Media | Environmental Chemistry Letters

Artigo Brasil Produção Nacional Revisado por pares

Rosimeire Resende dos Santos, Zenilda de Lourdes Cardeal, Helvécio Costa Menezes,

Air quality in large cities has worsened in recent years as a consequence people's health is directly affected. Among the toxic compounds released to environmental air are polycyclic aromatic hydrocarbons (PAHs), nitrated PAHs (nitro-PAHs), and oxygenated PAHs (oxy-PAHs). Performant methods to analyze these compounds is necessary to enable adequate monitoring of air quality. Thus, this manuscript presents the development of a highly sensitive method to analyze PAHs, nitro-PAHs, and oxy-PAHs collected ...

Tópico(s): Atmospheric chemistry and aerosols

2020 - Elsevier BV | Chemosphere

Artigo Revisado por pares

Eduardo da Cunha Richard, Helvecio de Aguiar Duarte, Gustavo Calderucio Duque Estrada, Jean‐Philippe Bechtold, Brígida Gusso Maioli, Antonio Henrique Araujo de Freitas, Kara E. Warner, Luis Henrique Melges Figueiredo,

ABSTRACT The Fundão dam (Minas Gerais, Brazil) breach resulted in the transport and deposition of Fe mine tailings and debris for approximately 670 km along the Doce River watershed. Following the event, an extensive water quality monitoring program was implemented. The results generated by this program were used to assess the temporal and spatial impacts of the event on water quality. Data from several sampling sites situated along affected watercourses collected from 6 November 2015 to 27 September ...

Tópico(s): Hydropower, Displacement, Environmental Impact

2020 - Wiley | Integrated Environmental Assessment and Management

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Andreína I. Castillo, Carlos Chacón‐Díaz, Neysa Rodríguez-Murillo, Helvécio Della Coletta-Filho, Rodrigo P. P. Almeida,

Abstract Background Pathogens with a global distribution face diverse biotic and abiotic conditions across populations. Moreover, the ecological and evolutionary history of each population is unique. Xylella fastidiosa is a xylem-dwelling bacterium infecting multiple plant hosts, often with detrimental effects. As a group, X. fastidiosa is divided into distinct subspecies with allopatric historical distributions and patterns of multiple introductions from numerous source populations. The capacity ...

Tópico(s): Plant Pathogenic Bacteria Studies

2020 - BioMed Central | BMC Genomics

Artigo Brasil Produção Nacional Revisado por pares

José Messias Gomes, Tatiana Fernandes Araújo Almeida, Tarcı́lia Aparecida Silva, Zenilda de Lourdes Cardeal, Helvécio Costa Menezes,

Tópico(s): Toxic Organic Pollutants Impact

2020 - Springer Science+Business Media | Analytical and Bioanalytical Chemistry

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Marcelo Henrique Santos Paiva, Duschinka Ribeiro Duarte Guedes, Cássia Docena, Matheus Filgueira Bezerra, Filipe Zimmer Dezordi, Laís Ceschini Machado, Larissa Krokovsky, Elisama Helvécio, Alexandre Freitas da Silva, Luydson Richardson Silva Vasconcelos, Antônio Mauro Rezende, Severino Jefferson Ribeiro da Silva, Kamila Gaudêncio da Silva Sales, Bruna Santos Lima Figueiredo de Sá, Derciliano Lopes da Cruz, Claudio Eduardo Cavalcanti, Armando Menezes‐Neto, Caroline Targino Alves da Silva, Renata Pessôa Germano Mendes, Maria Almerice Lopes da Silva, Tiago Gräf, Paola Cristina Resende, Gonzalo Bello, Michelle da Silva Barros, Wheverton Ricardo Correia do Nascimento, Rodrigo Moraes Loyo, Luciane Caroline Albuquerque Bezerra, Sinval Pinto Brandão-Filho, Constância Flávia Junqueira Ayres, Gabriel Luz Wallau,

Multiple epicenters of the SARS-CoV-2 pandemic have emerged since the first pneumonia cases in Wuhan, China, such as Italy, USA, and Brazil. Brazil is the third-most affected country worldwide, but genomic sequences of SARS-CoV-2 strains are mostly restricted to states from the Southeast region. Pernambuco state, located in the Northeast region, is the sixth most affected Brazilian state, but very few genomic sequences from the strains circulating in this region are available. We sequenced 101 strains ...

Tópico(s): Bacteriophages and microbial interactions

2020 - Multidisciplinary Digital Publishing Institute | Viruses