Pesquisa | SciELO

Abstract This research aimed to produce and evaluate particleboard with pinus waste using two production methodologies. One applied to homogeneous panels (single layer) and another to heterogeneous panels (three layers). The panels were produced with an initial density of 0.550 g/cm³, with 10% polyurethane resin derived from castor oil (PUR) for the homogeneous panels and 12% for the heterogeneous ones. The pressing parameters were 5 MPa, with a temperature of 100 ºC and 10 min of pressing, with an interval of 30 s. The tests performed according to NBR 14810-2 (ABNT, 2018) standard. As a result, it was observed that the reorganization of the particles of the heterogeneous panels added to the increase of the adhesive were factors that improved the final properties of the panels, which are classified to be used as decoration objects and in the furniture industry, not obtaining classification of homogeneous panels.

Resumo Esta pesquisa teve como objetivo produzir e avaliar painéis aglomerados com resíduo de pinus medianteuma metodologia de produçãoaplicada para painéis homogêneos e outra para heterogêneos. Os painéis homogêneos e heterogêneos foram produzidos com densidade inicial de 0,550 g/cm³ e com 10% e 12% de resina de poliuretano derivado do óleo de mamona (PUR) respectivamente. Os parâmetros de prensagem foram de 5 MPa, com temperatura de 100 ºC e 10 min de prensagem, com um intervalo de 30 s. Os ensaios realizados seguiram a normativa NBR 14810-2 (ABNT, 2018). Observou-se que a reorganização das partículas dos painéis heterogêneos somada ao aumento do adesivo foram fatores que melhoraram as propriedades finais desses painéis, classificados para ser utilizados como objetos de decoração e na indústria moveleira, enquanto os painéis homogêneos não obtiveram classificação.

https://doi.org/10.1590/s1678-86212023000300686

The Challenges of Implementing a Text Message Intervention to Promote Behavioral Change in Primary Care Patients With Hypertension and Diabetes
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Oliveira, João Antonio de Queiroz

; Cimini, Christiane

; Almeida, Vania

; Maia, Junia Xavier

; Resende, Raissa Eda

; Gualberto, Leticia Alves

; Santos, Pedro Henrique Lauar

; Gomes, Paulo R.

; Bonisson, Leonardo

; Paixão, Maria Cristina

; Costa, Janaina Moutinho

; Cardoso, Clareci Silva

; Santo, Karla

; Ribeiro, Antonio

; Martins, Maria Auxiliadora

; Marcolino, Milena S.

International Journal of Cardiovascular Sciences

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 36 elocation e20220050

Resumo: En | Texto: En | PDF: En

Abstract Background Controlling blood pressure and glycemic levels is a challenge that requires innovative solutions. Objective To assess the feasibility of implementing a text message intervention among low-income primary care patients, as well as to assess self-reported behavioral change. Methods A set of 200 text messages was developed on healthy eating, physical activity, adherence, and motivation. Participants from Vale do Mucuri, MG, Brazil diagnosed with diabetes or hypertension or undergoing screening for those diseases, received 5 to 8 messages per week for 6 months. They answered a questionnaire to report their satisfaction and behavioral changes. Results Of the 136 patients, 117 (86.0%) answered the questionnaire. Most reported that the messages were very useful (86.3%), easy to understand (90.6%), and were very helpful for behavioral change (65.0%); 84.6% reported that they had started eating healthier. The most frequent reported lifestyle changes were: improved diet quality (85.5%), reduced portions (65.8%), and weight loss (56.4%). The majority of patients shared the messages (60.7%) with family or other acquaintances, considered the number of messages to be adequate (89.7%) and would recommend the program to others (95.7%). Conclusion An intervention based on text messages to promote behavioral change in patients with hypertension or diabetes in primary care is feasible in low-resource settings. Future studies are needed to assess the program’s long-term effects on clinical outcomes.

https://doi.org/10.36660/ijcs.20220050

Spatial, spatio-temporal, and origin-destination flow analyses of patients with severe acute respiratory syndrome hospitalized for COVID-19 in Southeastern Brazil, 2020-2021
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Palasio, Raquel Gardini Sanches

; Lorenz, Camila

; Lucas, Pamella Cristina de Carvalho

; Nielsen, Lucca

; Masuda, Eliana Tiemi

; Trevisan, Camila Martins

; Cortez, André Lazzeri

; Monteiro, Pedro de Campos Mello

; Simões, Caroline Salomão

; Ferreira, Patrícia Marques

; Pellini, Alessandra Cristina Guedes

; Yu, Ana Lucia Frugis

; Carvalhanas, Telma Regina Marques

Revista do Instituto de Medicina Tropical de São Paulo

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 65 elocation e6

Resumo: En | Texto: En | PDF: En

ABSTRACT Brazil experienced one of the fastest increasing numbers of coronavirus disease (COVID-19) cases worldwide. The Sao Paulo State (SPS) reported a high incidence, particularly in Sao Paulo municipality. This study aimed to identify clusters of incidence and mortality of hospitalized patients with severe acute respiratory syndrome for COVID-19 in the SPS, in 2020–2021, and describe the origin flow pattern of the cases. Cases and mortality risk area clusters were identified through different analyses (spatial clusters, spatio-temporal clusters, and spatial variation in temporal trends) by weighting areas. Ripley’s K12-function verified the spatial dependence between the cases and infrastructure. There were 517,935 reported cases, with 152,128 cases resulting in death. Of the 470,441 patients hospitalized and residing in the SPS, 357,526 remained in the original municipality, while 112,915 did not. Cases and death clusters were identified in the Sao Paulo metropolitan region (SPMR) and Baixada Santista region in the first study period, and in the SPMR and the Campinas, Sao Jose do Rio Preto, Barretos, and Sorocaba municipalities during the second period. We highlight the priority areas for control and surveillance actions for COVID-19, which could lead to better outcomes in future outbreaks.

https://doi.org/10.1590/s1678-9946202365006

First microscopic and molecular parasitological survey of Strongylus vulgaris in Brazilian ponies
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Martins, André Vianna

; Coelho, Aline de Lima

; Corrêa, Laís Lisboa

; Ribeiro, Mariana Santos

; Lobão, Lucas Fernandes

; Palmer, João Pedro Siqueira

; Moura, Lucas Cavalcante de

; Molento, Marcelo Beltrão

; Barbosa, Alynne da Silva

Revista Brasileira de Parasitologia Veterinária

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 32 Nº 3 elocation e006323

Resumo: En Pt | Texto: En Pt | PDF: En | PDF: Pt

Abstract The frequency of gastrointestinal parasites with an emphasis on Strongylus vulgaris was investigated among the Brazilian Pony breed kept on farms in the municipality of Teresópolis, state of Rio de Janeiro. Fecal samples were collected in three stud farms: A (n= 22 animals), B (n= 3), and C (n= 2). Fecal samples were subjected to the quantitative Mini-FLOTAC technique, using three different solutions, and to qualitative techniques. The parasite prevalence was found to be 81.4%. Eggs from strongylids were identified in 74% of the ponies. Eggs of Parascaris spp. were detected in 22.7% of the animals, which were all females of farm A. At this locality, mares were kept with their foals in fenced paddocks all the time. The NaCl solution of d = 1.200 g/ml was generally the one that presented the highest frequency of diagnosis of nematode eggs and the highest mean of fecal eggs per gram. The fecal samples were also subjected to the polymerase chain reaction for amplification of DNA from the ITS2 region for Strongylus vulgaris. Twelve samples presented nucleotide sequences for S. vulgaris. In the end, this study revealed the high frequency (96.3%) of S. vulgaris among ponies on farms in Teresópolis, Rio de Janeiro, Brazil.

Resumo A frequência de parasitos gastrointestinais, com ênfase na pesquisa de Strongylus vulgaris, foi investigada entre os Pôneis Brasileiros criados em haras na cidade de Teresópolis, no estado do Rio de Janeiro. Amostras fecais foram coletadas em três haras: A (n=22 animais), B (n=3) e C (n=2). Amostras fecais foram submetidas à técnica quantitativa de Mini-FLOTAC utilizando três diferentes soluções e técnicas qualitativas. A prevalência de parasitos foi de 81,4%. Ovos de estrôngilos foram identificados em 74% dos pôneis. Ovos de Parascaris spp. foram detectados em 22,7% dos animais, sendo todos fêmeas do haras A. Nesta propriedade, as éguas eram mantidas com os pôneis em piquetes cercados durante todo o tempo. A solução de NaCl, com densidade de 1.200 g/ml, foi a que apresentou a maior frequência diagnóstica de ovos de nematoides e a maior contagem de ovos por grama de fezes. As amostras também foram submetidas à reação de polimerase em cadeia para amplificar DNA da região ITS2 de Strongylus vulgaris. Doze amostras fecais apresentaram sequências nucleotídicas de S. vulgaris. Ao final, este estudo demonstrou a alta frequência (96.3%) de S. vulgaris em pôneis mantidos em haras na cidade de Teresópolis, Rio de Janeiro, Brazil.

https://doi.org/10.1590/s1984-29612023036

Multidisciplinary Scientific Cruises for Environmental Characterization in the Santos Basin – Methods and Sampling Design
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Moreira, Daniel L.

; Dalto, Adriana G.

; Figueiredo JR, Alberto G.

; Valerio, Aline M.

; Detoni, Amalia M. S.

; Bonecker, Ana C. T.

; Signori, Camila N.

; Namiki, Cláudia

; Sasaki, Dalton K.

; Pupo, Daniel V.

; Silva, Danilo A.

; Kutner, Deborah S.

; Duque-Castaño, Diana C.

; Marcon, Eduardo H.

; Gallotta, Fabiana D. C.

; Paula, Fabiana S.

; Gallucci, Fabiane

; Roque, Gabriela C. F.

; Campos, Giulia S.

; Fonseca, Gustavo

; Mattos, Gustavo

; Lavrado, Helena P.

; Silveira, Ilson C. A. da

; Costa, Jessica O.

; Santos Filho, João R. dos

; Carneiro, Juliane C.

; Moreira, Julio C.F.

; Rozo, Laura

; Araujo, Leandro F.M.

; Lazzari, Letícia

; Silva, Letícia O. da

; Michelazzo, Luan S.

; Fernandes, Luciano F.

; Dottori, Marcelo

; Araújo Jr., Marcus A. G. de

; Chuqui, Mateus G.

; Ceccopieri, Milena

; Borges-Silva, Milton

; Kampel, Milton

; Bergo, Natascha M.

; Silva, Paulo V. M.

; Tura, Pedro M.

; Moura, Rafael B. de

; Romano, Renato G.

; Martins, Renato P.

; Carreira, Renato S.

; Toledo, Rodrigo G.A.

; Bonecker, Sérgio L.C.

; Disaró, Sibelle T.

; Rodrigues, Silvana V.

; Corbisier, Thais N.

; Vicente, Thaisa M.

; Paiva, Vitor G. de

; Pellizari, Vivian H.

; Belo, Wellington C.

; Brandini, Frederico P.

; Sousa, Silvia H.M

Ocean and Coastal Research

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 71 Supl. 3 elocation e23022

Resumo: En | Texto: En | PDF: En

Abstract The Santos Basin (SB) is the main petroliferous basin in the Brazilian continental margin and one of the most studied marine areas in Brazil. However, historical data suggest that new efforts should be carried out to acquire quantitative biological data, especially in the deep sea, to establish the baseline of essential ocean variables in different ecosystems for future monitoring programs. The Brazilian energy company Petrobras planned and executed 24 oceanographic cruises over a period of 2 years to assess the benthic (SANSED cruise) and pelagic (SANAGU cruise) systems of the SB (356 days at sea in 2019 and 2021/2022). These efforts were part of the Santos Project, which comprised a comprehensive environmental study aimed at investigating benthic and pelagic variables to characterize ecology, biogeochemistry, thermohaline properties of water masses, and ocean circulation patterns, geomorphology, and sedimentology, as well as organic and inorganic chemistry. Here we present the detailed sampling designs and the field methods employed on board, during the SB scientific cruises. All sampling protocols were based on standardized approaches. For the benthos analyses, triplicate sediment samples were performed using a GOMEX-type box corer (0.25 m²) or a large modified Van Veen grab (0.75 m²) at 100 stations ranging from 25 to 2400 m depth. At each station, 25 geochemical and physico-chemical parameters were analyzed in addition to micro-, meio-, and macrofauna and living foraminifera samples. For the pelagic system, 60 stations were selected to investigate the plankton community, ranging in size from pico- to macroplankton, through vertical, horizontal, and oblique net hauls (20, 200, and 500 μm mesh size), as well as 25 biogeochemical parameters collected with an aid of a CTD-rosette sampler. Part of this scientific information also serves the Regional Environmental Characterization Project (PCR-BS) in support of Petrobras’ Santos Basin drilling licensing process led by the Brazilian Environmental Agency – IBAMA. This project contributes to the sustainable development of the SB, in line with the guidelines of the United Nations Decade of Ocean Science for Sustainable Development.

https://doi.org/10.1590/2675-2824071.22072dlm

Green Manure as an Alternative for Soil Recovery in a Bauxite Mining Environment in Southeast Brazil
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Fonseca, Wesley da Silva

; Martins, Sebastião Venâncio

; Villa, Pedro Manuel

Floresta e Ambiente

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2023, Volume 30 Nº 1 elocation e20220041

Resumo: En | Texto: En | PDF: En

Abstract The objective of this study was to evaluate plant cover and dry mass produced by green manures and their influence on the chemical attributes of soil for the ecological restoration of an area around bauxite mine environment in Southeast Brazil. Soil preparation, chemical fertilization and sowing of three species of green manures were carried out: Cajanus cajan, Crotalaria juncea and Stylosanthes guianensis. In general, C. cajan and C. juncea showed the best performance in plant cover. C. cajan and S. guianensis produced more phytomass. Green manures were efficient to promote rapid plant cover and increase in soil organic matter and total-N contents in all treatments. Therefore, green manure is a viable alternative that contributes to the success of ecological restoration projects in areas in the bauxite mining environment. Brazil preparation out general C S phytomass totalN total N treatments Therefore

https://doi.org/10.1590/2179-8087-floram-2023-0041

ESTUDO ONE-POT DA APLICAÇÃO DO CATALISADOR DE GRUBBS DE PRIMEIRA GERAÇÃO EM REAÇÕES DE METÁTESE DA PIPERINA E EUGENOL: A INFLUÊNCIA DA LIGAÇÃO DUPLA TERMINAL
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Costa, Ana K. B.

; Fernandes, Kerlane A.

; Vieira, Vanessa B.

; França, Aline A. C.

; Lima, Wanessa A.

; Almeida, Pedro M. de

; Matos, José M. E. de

; Neto, Benedito S. L.

; Sá, José L. S.

; Martins, Francielle A.

Química Nova

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

Ago 2022, Volume 45 Nº 8 Páginas 929 - 934

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

In this paper, the piperine (PIP) and eugenol (EUG) organic compounds were used as substrates in olefin metathesis reactions catalyzed by first-generation Grubbs catalyst (G1) - [RuCl2(PCy3)2(=CHPh)], Cy is cyclohexyl and Ph is phenyl, in a one-pot system. The reactions occurred at 50 ºC, for 24, 48, or 96 h using the two substrates simultaneously in the ratio Ru:PIP:EUG of 1:1:1 and 1:10:10 mol. The results were evaluated by GC-MS, discussed in terms of the electronic and steric characteristics of the G1, and the structural proprieties of the substrates. In the Ru:PIP:EUG ratio of 1:1:1 mol, a dimeric species was observed for the olefin metathesis of EUG, in all time studied and in an additional experiment at 70 ºC for 48 h. When the Ru:PIP:EUG ratio was 1:10:10 mol, this dimer was not observed. Isomerization processes also were observed at all temperatures and catalyst:substrates ratio. The reaction yield increased with the raise of substrates amount. There was no cross-metathesis reaction. This fact was attributed to the chelating effect of the double coordination of the PIP to the catalyst.

https://doi.org/10.21577/0100-4042.20170901

Early neonatal sepsis: prevalence, complications and outcomes in newborns with 35 weeks of gestational age or more
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Camargo, Juliana Fernandes de

; Caldas, Jamil Pedro de Siqueira

; Marba, Sérgio Tadeu Martins

Revista Paulista de Pediatria

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 40 elocation e2020388

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

RESUMO Objetivo: Analisar a prevalência, as complicações e as condições de alta dos recém-nascidos ≥35 semanas com diagnóstico de sepse neonatal precoce. Métodos: Estudo transversal, com coleta retrospectiva de dados. Incluíram-se todos recém-nascidos com 35 semanas ou mais de idade gestacional, com diagnóstico de sepse precoce em um período de quatro anos (janeiro/2016 a dezembro/2019) em uma unidade neonatal nível III. Os diagnósticos realizaram-se segundo os critérios da Agência Nacional de Vigilância Sanitária e os episódios classificados segundo a confirmação microbiológica e o sítio de infecção. As complicações avaliadas foram: choque, distúrbio de coagulação e sequelas do sistema nervoso central. Também se avaliaram as condições de alta. Os dados coletados foram analisados utilizando estatística descritiva. Resultados: No período, 46 recém-nascidos apresentaram sepse precoce, correspondendo a 1,8% das internações e a uma prevalência de 4/1.000 nascidos vivos. Em três pacientes a sepse foi confirmada por culturas (0,3/1.000 nascidos vivos), respectivamente por S. pneumoniae, S. epidermidis e S. agalactiae. Quanto ao sítio de infecção, foram 35 casos de infecção primária da corrente sanguínea, 7 casos de pneumonia e 4 de meningite. A maior parte dos pacientes (78,3%) possuía pelo menos um fator de risco para sepse, e todos apresentaram-se sintomáticos. Não houve óbito. Complicações ocorreram em 28,2% dos casos, especialmente choque (10 casos – 21,7%). Conclusões: A prevalência de sepse neonatal precoce comprovada foi baixa. Apesar da ocorrência comum de complicações, não houve óbitos.

ABSTRACT Objective: To analyze the incidence, complications, and hospital discharge status in newborns with ≥35 weeks of gestational age with early neonatal sepsis. Methods: This is a cross-sectional, retrospective study. Cases of early-onset sepsis registered from January 2016 to December 2019 in neonates with gestational age of 35 weeks or more were reviewed in a level III neonatal unit. The diagnoses were performed based on the criteria by the Brazilian Health Regulatory Agency (Anvisa), and the episodes were classified according to microbiological classification and site of infection. The following complications were evaluated: shock, coagulation disorders, and sequelae of the central nervous system. The conditions at hospital discharge were also assessed. The collected data were analyzed with the descriptive analysis. Results: In the period, early neonatal sepsis occurred in 46 newborns, corresponding to 1.8% of all newborns admitted to the neonatal unit, with a prevalence of 4/1,000 live births. Culture confirmed sepsis ocurred in three patients (0.3/1,000 live births), with the following agents: S. pneumoniae, S. epidermidis and S. agalactiae. As to site of infection, there were 35 cases of primary bloodstream infection, seven cases of pneumonia and four cases of meningitis. Most patients (78.3%) had at least one risk factor for sepsis, and all were symptomatic at admission. There were no deaths. Complications occurred in 28.2% of the cases, especially shock (10 cases – 21.7%). Conclusions: The prevalence of proven early neonatal sepsis was low. Despite the common occurrence of complications, there were no deaths.

https://doi.org/10.1590/1984-0462/2022/40/2020388 241 downloads

Protective effect of kavain in meristematic cells of Allium cepa L.
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

VALE JUNIOR, ERASMO P. DO

; FERREIRA, MARCOS VITOR R.

; FERNANDES, BIANCA CRISTINA S.

; SILVA, THAIS T. DA

; MARTINS, FRANCIELLE ALLINE

; ALMEIDA, PEDRO MARCOS DE

Anais da Academia Brasileira de Ciências

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 94 Nº 2 elocation e20200520

Resumo: En | Texto: En | PDF: En

Abstract Kavain is one of the main kavalactones of Piper methysticum (Piperaceae) with anxiolytic, analgesic, and antioxidant activities. Therefore, the aim of the study was to evaluate the cytotoxic, mutagenic, and antimutagenic potential of kavain in Allium cepa cells. Roots of A. cepa were transferred to the negative (2% acetone) and positive (10 µg/mL of Methylmethanesulfonate, MMS) controls and to the concentrations of kavain (32, 64 and 128 µg/mL) for 48 h. A total of 5,000 meristematic cells were analyzed under an optical microscope to determine the mitotic index, mean number of chromosomal alterations and percentage of damage reduction. Data were analyzed by Kruskal-Wallis test (p <0.05). All concentrations of kavain were not cytotoxic and did not show significant chromosomal changes when compared to 2% acetone. Kavain showed a cytoprotective effect in the pre (128 μg/mL) and in the post-treatment (32 and 64 μg/mL) and reduced damage against the mutagenic action of MMS in all concentrations of the pre and simultaneous and at the highest of post (128 μg/mL). Kavain promoted a significant reduction in micronuclei, nuclear buds and chromosomal losses in relation to MMS. The observed data indicate the importance of kavain for the inhibition of damage and chemoprevention.

https://doi.org/10.1590/0001-3765202220200520

10.

Qual o papel do conselho geral na gestão das escolas públicas portuguesas? Percepções dos diretores
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Delgado, Paulo

; Diogo, Vera

; Carvalho, João M. S.

; Martins, Pedro

Educação e Pesquisa

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 48 elocation e249171

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo O atual modelo de gestão escolar, consagrado no Decreto-Lei nº 75/2008, de 22 de abril, conta com mais de dez anos de aplicação. O objetivo do estudo em que se integra este artigo é fazer um balanço da vigência do modelo de gestão escolar, na perspectiva dos diretores, enquanto principais agentes decisores dentro das escolas, recolhendo interpretações e posições que identifiquem desafios para o modelo formal e para sua concretização nas práticas da administração e gestão escolar. Para este artigo, analisamos, através dos dados obtidos em 30 entrevistas exploratórias e 83 questionários, as percepções dos diretores de escolas ou agrupamentos sobre o papel do conselho geral no modelo de gestão. Concluiu-se que os diretores têm opiniões divergentes acerca da sua composição e atribuições, mas concordam, em geral, com a falta de competências para o exercício de alguns dos seus objetivos, assim como apontam dúvidas relativamente à capacidade dos seus elementos para terem uma participação relevante e suficientemente isenta nas suas decisões, podendo ser controlados pelo diretor ou por forças externas. Como positivo, apontam a representação dos diversos grupos de atores internos e externos à escola. No entanto, não se verifica uma relação significativa entre as percepções dos diretores sobre o conselho geral e suas perspectivas sobre os fatores de sucesso na gestão escolar, a autonomia das escolas ou as relações entre eles e as diversas entidades.

Abstract The current school management model, enshrined in Decree-Law No. 75/2008, of April 22, has been operating for over ten years. The objective of this study is to take stock of the validity of the school management model, from the perspective of Principals, as the primary decision-makers within schools, collecting interpretations and positions that identify challenges for the formal model and its implementation in the practices of school administration and management. For this article, we analyzed, through data obtained with 30 exploratory interviews and 83 questionnaires, the perceptions of school principals about the role of the general council in the management model. The conclusions show that the principals have divergent opinions about the general council’s composition and attributions. Still, they generally agree with the lack of competencies to carry out some of their objectives, as well as point out doubts regarding the ability of their elements to have relevant participation and sufficiently unbiased decisions without being controlled by the principal or external forces. As positive, they point to the representation of different groups of actors inside and outside the school. However, there is no significant relationship between the principals’ perceptions of the general council and their perspectives on the success factors in school management, the autonomy of schools or the relationships between them and the various entities.

https://doi.org/10.1590/s1678-4634202248249171

11.

A vertical-mode extrapolation scheme applied to the Brazil Current domain: quasi-synoptic scenarios
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Amorim, João P. M.

; Silveira, Ilson C. A. da

; Borges-Silva, Milton

; Souza-Neto, Pedro W. M.

; Belo, Wellington C.

; Lazaneo, Cauê Z.

; Bernardo, Piero S.

; Dottori, Marcelo

; Martins, Renato P.

; Moreira, Daniel L.

Ocean and Coastal Research

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2022, Volume 70 Supl. 1 elocation e22055

Resumo: En | Texto: En | PDF: En

Abstract The Brazil Current (BC) is a western boundary current, with an average vertical extension of 500 m, which occupies the southwestern margin of Atlantic Ocean. Recently, the South Brazil Bight - SBB (23º S - 28º S) has been intensively explored by the oil and gas industries, which brought a high demand in operational oceanography and ocean state monitoring. In this study we present a new technique based on the vertical dynamic modes of oscillation, to extrapolate velocity profiles in the SBB, with potential applications to data acquired by Vessel Mounted Acoustic Doppler Current Profilers (VMADCP). Using four quasi-synoptic crosssectional velocity data, acquired by Lowered Acoustic Doppler Current Profilers (LADCP), we observed that the mean circulation of this region can be characterized as a 2-dynamical mode system. This mean circulation is mainly dominated at surface by the BC and at intermediate levels by the Intermediate Western Boundary Current (IWBC), which flows northward. Furthermore, observed mesoscale vortical features in the SBB, such as eddies and meanders, are shown to be primarily barotropic-mode dominated. In our extrapolation methodology, the use of an independent set of velocity time series obtained by four moorings has shown to be a valid way for obtaining the relative contribution of each dynamical mode in the velocity field in the SBB. Normalized mean squared errors below 10% and radar diagrams show that the presented methodology was able to reproduce the main dynamic features observed by LADCP transects. Also, with this technique, we extrapolated three VMADCP sections and the results agreed with previous observations.

https://doi.org/10.1590/2675-2824070.22141jpma

12.

Que fatores contribuem para o sucesso da gestão escolar? A perspetiva dos diretores
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Delgado, João Paulo

; Carvalho, João M. S.

; Romão, Paula

; Martins, Pedro

Revista Portuguesa de Educação

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

Jun 2021, Volume 34 Nº 1 Páginas 73 - 94

Resumo: En Es Pt | Texto: En Es Pt | PDF: En | PDF: Es | PDF: Pt

Abstract This study intends to take stock, from the perspective of the school principals, of their performance in the light of the present model of school administration, in an attempt to point out success factors in management, as well as potential changes to the current model, proposed by them. Data were collected in 2018 through exploratory interviews in a stratified sample, composed of 30 principals in office, in the district of Porto, with a management experience of at least 4 years. The main parameters that the principals associate more with better management are specialized training, advisory services, relationship with the community and collegiate work. With regard to changes, the main suggestions are the strengthening of autonomy, changes in the composition and powers of the General Council, legislative stability and legal and accounting support.

Resumen Este estudio pretende hacer un balance, desde la perspectiva de los directores, de su desempeño a la luz del modelo actual de administración escolar, en un intento de señalar factores de éxito en la gestión, así como posibles cambios al modelo actual, propuestos por ellos. Los datos fueron recolectados en 2018 a través de entrevistas exploratorias en una muestra estratificada, compuesta por 30 directores en funciones, en el distrito de Oporto, con una experiencia gerencial de al menos 4 años. Los principales parámetros que los directores asocian más con una mejor gestión son la formación especializada, la asesoría, la relación con la comunidad y el trabajo colegiado. En cuanto a los cambios, las principales sugerencias son el fortalecimiento de la autonomía, cambios en la composición y competencias del Consejo General, estabilidad legislativa y apoyo legal y contable.

Resumo Este estudo pretende fazer um balanço, na perspetiva dos diretores, da sua atuação à luz do presente modelo de administração escolar, na tentativa de apontar fatores de sucesso na gestão, bem como potenciais mudanças ao atual modelo, por eles propostas. Os dados foram recolhidos, em 2018, através de entrevistas exploratórias numa amostra estratificada, composta por 30 diretores em funções, no distrito do Porto, com uma experiência de gestão de, pelo menos, 4 anos. Os principais parâmetros que os diretores mais associam a uma melhor gestão são a formação especializada, as assessorias, a relação com a comunidade e o trabalho colegial. No que diz respeito às mudanças, as sugestões principais são o reforço da autonomia, a alteração da composição e das competências do Conselho Geral, a estabilidade legislativa e o apoio jurídico e contabilístico.

https://doi.org/10.21814/rpe.18920 31 downloads

13.

Cytogenotoxicity and protective effect of piperine and capsaicin on meristematic cells of Allium cepa L.
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

DIAS, MARCONDES S.

; JUNIOR, ERASMO P.V.

; SANTOS, BIANCA C. DOS

; MARTINS, FRANCIELLE A.

; ALMEIDA, PEDRO M. DE

; PERON, ANA P.

Anais da Academia Brasileira de Ciências

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

2021, Volume 93 elocation e20201772

Resumo: En | Texto: En | PDF: En

Abstract Piperine and capsaicin are important molecules with biological and pharmacological activities. This study aimed to evaluate the cytogenotoxic and protective effect of piperine and capsaicin on Allium cepa cells. A. cepa roots were exposed to negative (2% Dimethylsulfoxide) and positive (Methylmethanesulfonate, MMS, 10 µg/mL) controls, and four concentrations (25-200 µM) of piperine or capsaicin (alone) or associated before, simultaneously or after with the MMS. Only the lowest concentration of piperine (25 µM) showed a protective effect because it was not genotoxic. Piperine and capsaicin were cytotoxic (50, 100 and 200 µM). Piperine (50 to 200 µM) caused a significant increase in the total average of chromosomal alterations of in A. cepa cells. For capsaicin, the genotoxic effect was dose-dependent with a significant increase for all concentrations, highlighting the significant presence of micronuclei and nuclear buds for the two isolates. In general, bioactive compounds reduced the total average of chromosomal alterations against damage caused by MMS, mainly micronuclei and/or nuclear buds. Therefore, the two molecules were cytotoxic and genotoxic at the highest concentrations, and did not have cytoprotective action, and the lowest concentration of piperine demonstrated important chemopreventive activity.

https://doi.org/10.1590/0001-3765202120201772 90 downloads

14.

Preparation of Fluorescent Carbon-Based Dots from Waste Tire Pyrolysis
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Parra, Juliana B.

; Silva, Karina C.

; Valezin, Pedro A. S.

; Martins, Raphael G.

; Gomes, Rodolfo R.

; Pereira, Rafael S.

; Melo, Fernando M. de

; Morandim-Giannetti, Andreia de A.

; Santos, Ronaldo G. dos

; Panzarini, Luz Consuelo G. A.

; Toyama, Marcos M.

Journal of the Brazilian Chemical Society

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

Nov 2020, Volume 31 Nº 11 Páginas 2224 - 2231

Resumo: En | Texto: En | PDF: En

The pyrolysis of waste tire has been proposed as an alternative route to its recycling producing residual oils that can be used as fuels. In this work, a physicochemical process to obtain carbon-based dots (CBD) from carbon black (CBL) derivatives of tires is described. For this, the CBL was treated with different acids to produce CBL1 and CBL2 particles suspension. The pH of the suspension was adjusted to 5.6 to precipitate remaining impurities. Afterwards, the supernatant was ultra-centrifuged and the yellow pale solid, the purified CBD obtained by roto evaporation, was characterized by ultraviolet-visible spectrophotometer (UV-Vis), photoluminescence (PL) at 320-380 nm, high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared microscopy (mFTIR), and X-ray photoelectron spectroscopy (XPS). This material showed the typical excitation wavelength dependent emission and a PL quantum yield of 19.29% and was constituted by a well-defined spherical shaped and single sheets of “graphene quantum dots” with undefined shape, with potential applications in optoelectronic and fluorescence imaging devices.

https://doi.org/10.21577/0103-5053.20200072 428 downloads

15.

Registro Multicêntrico de Takotsubo (REMUTA) – Aspectos Clínicos, Desfechos Intra-Hospitalares e Mortalidade a Longo Prazo
Facebook Twitter

Outras redes sociais
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Outras redes

Métricas
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Almeida Junior, Gustavo Luiz Gouvêa de

; Mansur Filho, João

; Albuquerque, Denilson Campos de

; Xavier, Sergio Salles

; Pontes, Álvaro

; Gouvêa, Elias Pimentel

; Martins, Alexandre Bahia Barreiras

; Nunes, Nágela S. V.

; Carestiato, Lilian Vieira

; Petriz, João Luiz Fernandes

; Santos, Armando Márcio Gonçalves

; Bandeira, Bruno Santana

; Abufaiad, Bárbara Elaine de Jesus

; Pacheco, Luciana da Camara

; Oliveira, Maurício Sales de

; Ribeiro Filho, Paulo Eduardo Campana

; Sampaio, Pedro Paulo Nogueres

; Duque, Gustavo Salgado

; Camillis, Luiz Felipe

; Marques, André Casarsa

; Lourenço Jr, Francisco Carlos

; Palazzo, José Ricardo

; Costa, Cláudio Ramos da

; Silva, Bibiana Almeida da

; Zukowski, Cleverson Neves

; Garcia, Romulo Ribeiro

; Zonis, Fernanda de Carvalho

; Paula, Suzana Andressa Morais de

; Ferrari, Carolina Gravano Ferraz

; Rangel, Bruno Soares da Silva

; Ferreira, Roberto Muniz

; Mendes, Bárbara Ferreira da Silva

; Castro, Isabela Ribeiro Carvalho de

; Souza, Leonardo Giglio Gonçalves de

; Araújo, Luiz Henrique dos Santos

; Giani, Alexandre

Arquivos Brasileiros de Cardiologia

Métricas do periódico
- Sobre o periódico
- SciELO Analytics

Ago 2020, Volume 115 Nº 2 Páginas 207 - 216

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Resumo Fundamento A síndrome de takotsubo (takotsubo) é uma forma de cardiomiopatia adquirida. Dados nacionais sobre essa condição são escassos. O Registro REMUTA é o primeiro a incluir dados multicêntricos dessa condição no nosso país. Objetivo Descrever as características clínicas, prognóstico, tratamento intra-hospitalar e mortalidade hospitalar e em 1 ano de seguimento. Métodos Estudo observacional, retrospectivo, tipo registro. Incluídos pacientes internados com diagnóstico de takotsubo ou que desenvolveram esta condição durante internação por outra causa. Os desfechos avaliados incluíram fator desencadeador, análise dos exames, uso de medicações, complicações e óbito intra-hospitalar e em 1 ano de seguimento. O nível de significância adotado foi de 5%. Resultados Foram incluídos 169 pacientes, em 12 centros no Estado do Rio de Janeiro. A idade média foi de 70,9 ± 14,1 anos e 90,5% eram do sexo feminino; 63% dos casos foram de takotsubo primário e 37% secundário. Troponina I foi positiva em 92,5% dos pacientes e a mediana de BNP foi de 395 (176,5; 1725). Supradesnivelamento do segmento ST esteve presente em 28% dos pacientes. A fração de ejeção do ventrículo esquerdo teve mediana de 40 (35; 48)%. Observamos taxa de 25,7% de ventilação mecânica invasiva e 17,4% de choque. Suporte circulatório mecânico foi utilizado em 7,7%. A mortalidade intra-hospitalar foi de 10,6% e a mortalidade ao final de 1 ano foi de 16,5%. Takotsubo secundário e choque cardiogênico foram preditores independentes de mortalidade. Conclusão Os resultados do REMUTA mostram que takotsubo não se trata de patologia benigna como se pensava, especialmente no grupo de takotsubo secundário que acarreta elevada taxa de complicações e de mortalidade. (Arq Bras Cardiol. 2020; 115(2):207-216)

Abstract Background Takotsubo syndrome (TTS) is an acquired form of cardiomyopathy. National Brazilian data on this condition are scarce. The Takotsubo Multicenter Registry (REMUTA) is the first to include multicenter data on this condition in Brazil. Objective To describe the clinical characteristics, prognosis, in-hospital treatment, in-hospital mortality, and mortality during 1 year of follow-up. Methods This is an observational, retrospective registry study including patients admitted to the hospital with diagnosis of TTS and patients admitted for other reasons who developed this condition. Evaluated outcomes included triggering factor, analysis of exams, use of medications, complications, in-hospital mortality, and mortality during 1 year of follow-up. A significance level of 5% was adopted. Results The registry included 169 patients from 12 centers in the state of Rio de Janeiro, Brazil. Mean age was 70.9 ± 14.1 years, and 90.5% of patients were female; 63% of cases were primary TTS, and 37% were secondary. Troponin I was positive in 92.5% of patients, and median BNP was 395 (176.5; 1725). ST-segment elevation was present in 28% of patients. Median left ventricular ejection fraction was 40 (35; 48)%. We observed invasive mechanical ventilation in 25.7% of cases and shock in 17.4%. Mechanical circulatory support was used in 7.7%. In-hospital mortality was 10.6%, and mortality at 1 year of follow-up was 16.5%. Secondary TTS and cardiogenic shock were independent predictors of mortality. Conclusion The results of the REMUTA show that TTS is not a benign pathology, as was once thought, especially regarding the secondary TTS group, which has a high rate of complications and mortality. (Arq Bras Cardiol. 2020; 115(2):207-216)

https://doi.org/10.36660/abc.20190166 1217 downloads

Exibindo

itens por página

Página de 4 Próxima

Selecione um ou mais resultados

Todos Ordem alfabética

Resultados

Gráfico comparativo Download CSV

Visualizar estatísticas de

Enviar resultado

E-mail do(s) destinatários*

Utilize ; (ponto e vírgula) para mais de um e-mail.

Enviar por e-mail

Esta página

Registros selecionados

Todos os registros (max. 300)

Alterar remetente, assunto e comentários

Seu email

Assunto

Comentários

Alterar remetente, assunto e comentários

Exportar resultados

Formato de exportação:

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

BibTeX

Citação

CSV (para Excel, etc)

Exportar:

Esta página

Itens selecionados

Todos os registros (max. 2000)

Mostrar mais

Sem resultados

Não foram encontrados documentos para sua pesquisa

Glossário e ajuda para busca

Você pode enriquecer sua busca de uma forma muito simples. Use os índices de pesquisa combinados com os conectores (AND ou OR) e especifique cada vez mais sua busca.

Por exemplo, se você deseja buscar artigos sobre
casos de dengue no Brasil em 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

Veja abaixo a lista completa de índices de pesquisa que podem ser usados:

Cód. do Índice	Elemento
ti	título do artigo
au	autor
kw	palavras-chave do artigo
subject	assunto (palavras do título, resumo e palavras-chave)
ab	resumo
ta	título abreviado da revista (ex. Cad. Saúde Pública)
journal_title	título completo da revista (ex. Cadernos de Saúde Pública)
la	código do idioma da publicação (ex. pt - Português, es - Espanhol)
type	tipo do documento
pid	identificador da publicação
publication_year	ano de publicação do artigo
sponsor	financiador
aff_country	código do país de afiliação do autor
aff_institution	instituição de afiliação do autor
volume	volume do artigo
issue	número do artigo
elocation	elocation
doi	número DOI
issn	ISSN da revista
in	código da coleção SciELO (ex. scl - Brasil, col - Colômbia)
use_license	código da licença de uso do artigo

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

Todo o conteúdo de www.scielo.org, exceto onde está identificado, está licenciado sob uma Licença Creative Commons.
saiba mais »