Search | SciELO

Abstract This work describes a pharmacological screening of Brazilian medicinal plants through their anti-inflammatory and cytotoxicity activities. Cytotoxicity activity of Mouriri elliptica and Alchornea glandulosa as well as the drugs celecoxib and doxorubicin were evaluated in cultures of peritoneal macrophages. The immune system influence of these samples was analyzed by determining production/inhibition of NO, production of tumor necrosis factor-α and production of interleukin-10. Regarding the production/inhibition of NO, there was NO production by M. elliptica and NO inhibition when the cells were exposed to A. glandulosa; Macrophages generally produce more NO, plus TNF-α and less IL-10, when associated to the tumor phenomenon, characterizing the inflammation involved in cancer. A. glandulosa showed anti-inflammatory effect, inhibited NO production and it was associated with low TNF-α production, although not as low as the macrophages associated with celecoxib and doxorubicin. These cytokines were not different in animals with tumor. Celecoxib confirms its anti-inflammatory action by markedly inhibiting NO and TNF-α, but also inhibiting IL-10 which is an anti-inflammatory cytokine. Doxorubicin inhibited NO in a higher percentage in the group of animals with tumor, although the literature reports that this drug stimulates the production of NO and this collaborates with its cytotoxic effect.

https://doi.org/10.1590/0001-3765202120191101 32 downloads

Suicide mortality among youth in southern Brazil: a spatiotemporal evaluation of socioeconomic vulnerability
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Alarcão, Ana C.

; Dell’ Agnolo, Cátia M.

; Vissoci, João R.

; Carvalho, Elias C.A.

; Staton, Catherine A.

; de Andrade, Luciano

; Fontes, Kátia B.

; Pelloso, Sandra M.

; Nievola, Júlio C.

; Carvalho, Maria D.

Brazilian Journal of Psychiatry

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2020, Volume 42 N. 1 Pages 46 - 53

Abstract: En | Text: En | PDF: En

Objective: To conduct a geospatial analysis of suicide deaths among young people in the state of Paraná, southern Brazil, and evaluate their association with socioeconomic and spatial determinants. Methods: Data were obtained from the Mortality Information System and the Brazilian Institute of Geography and Statistics. Data on suicide mortality rates (SMR) were extracted for three age groups (15-19, 20-24, and 25-29 years) from two 5-year periods (1998-2002 and 2008-2012). Geospatial data were analyzed through exploratory spatial data analysis. We applied Bayesian networks algorithms to explore the network structure of the socioeconomic predictors of SMR. Results: We observed spatial dependency in SMR in both periods, revealing geospatial clusters of high SMR. Our results show that socioeconomic deprivation at the municipality level was an important determinant of suicide in the youth population in Paraná, and significantly influenced the formation of high-risk SMR clusters. Conclusion: While youth suicide is multifactorial, there are predictable geospatial and sociodemographic factors associated with high SMR among municipalities in Paraná. Suicide among youth aged 15-29 occurs in geographic clusters which are associated with socioeconomic deprivation. Rural settings with poor infrastructure and development also correlate with increased SMR clusters.

https://doi.org/10.1590/1516-4446-2018-0352 713 downloads

Relação entre antropometría, gordura corporal e autoconceito de adolescentes do sexo feminino
Facebook Twitter

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

Metrics
- SciELO Analytics

Falconi, C.A.

; Santos, T. A.

; Figueira Junior, A. J.

; Neves, A. N.

; Andrade, E. L.

; Ferreira Brandão, M. R. F.

; Zanetti, M. C.

Cuadernos de Psicología del Deporte

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2019, Volume 19 N. 2 Pages 256 - 264

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

ABSTRACT Excess weight caused by accumulation of body fat and increased waist circumference can cause health risks for young people, contributing to the development of early psychosocial problems and reduced quality of life of adolescents. In this context, self-concept is an important indicator of psychological well-being, especially in young age. Among the many factors that may contribute to the perception of self-concept is the body composition, which is constantly modified in this phase of life. In this sense, excessive accumulation of body fat and increased abdominal circumference may be associated with positive or negative self-concepts, favoring the development of psychosocial factors in the young population for healthy behaviors. Thus, this study sought to analyze the relationship of waist circumference, fat percentage and the physical and global self-concept of female adolescents. For that, a cross-sectional study was carried out with the participation of 101 female adolescents, students of the High School of a State Technical School of the city of São Paulo. The Harter self-perception scale for adolescents was validated for Brazilian adolescents, in the dimensions of physical and global self-concept, and anthropometric measures of body mass and height were checked for BMI (body mass index), skin folds for the percentage of fat and perimeters for waist circumference. A small inverse correlation was found between the variables physical self-concept and waist circumference corroborating with other studies that indicated similar results.

RESUMO O excesso de peso causado pelo acúmulo de gordura corporal e a circunferência de cintura aumentada podem ocasionar riscos à saúde dos jovens, contribuindo para o desenvolvimento de problemas psicossociais precoces e redução da qualidade de vida do adolescente. Nesse contexto, o autoconceito é um importante indicador de bem-estar psicológico, principalmente na idade jovem. Dentre os inúmeros fatores que podem contribuir para a percepção do autoconceito está a composição corporal, que é constantemente modificada nessa fase da vida. Nesse sentido, o acúmulo excessivo de gordura corporal e o aumento da circunferência abdominal podem estar associadas a autoconceitos positivos ou negativos sobre si mesmo, favorecendo o desenvolvimento de fatores psicossociais da população jovem em prol de comportamentos saudáveis ou não. Assim, esse trabalho buscou analisar a relação da circunferência de cintura, o percentual de gordura e o autoconceito físico e global de adolescentes do sexo feminino. Para isso, foi realizado um estudo transversal com a participação de 101 adolescentes do sexo feminino, estudantes do Ensino Médio de uma Escola Técnica Estadual da cidade de São Paulo. Foi utilizada a escala de Autopercepção de Harter para Adolescentes validada para adolescentes Brasileiros, nas dimensões do autoconceito físico e global, e aferidas medidas antropométricas de massa corporal e estatura para a verificação do IMC (índice de massa corporal), pregas cutâneas para o percentual de gordura e perímetros para a circunferência de cintura. Foi encontrada uma correlação pequena e inversa entre as variáveis autoconceito físico e circunferência de cintura corroborando com outros estudos que apontaram resultados similares.

RESUMEN El exceso de peso causado por la acumulación de grasa corporal y la circunferencia de cintura aumentada pueden ocasionar riesgos para la salud de los jóvenes, contribuyendo al desarrollo de problemas psicosociales precoces y reducción de la calidad de vida del adolescente. En ese contexto, el autoconcepto es un importante indicador de bienestar psicológico, principalmente en la edad joven. Entre los innumerables factores que pueden contribuir a la percepción del autoconcepto está la composición corporal, que es constantemente modificada en esa fase de la vida. En este sentido, la acumulación excesiva de grasa corporal y el aumento de la circunferencia abdominal pueden estar asociadas a autoconceptos positivos o negativos sobre sí mismo, favoreciendo el desarrollo de factores psicosociales de la población joven en pro de comportamientos sanos o no. Así, ese trabajo buscó analizar la relación de la circunferencia de cintura, el porcentaje de grasa y el autoconcepto físico y global de adolescentes del sexo femenino. Para ello, se realizó un estudio transversal con la participación de 101 adolescentes del sexo femenino, estudiantes de la Enseñanza Media de una Escuela Técnica Estadual de la ciudad de São Paulo. Se utilizó la escala de Autopercepción de Harter para Adolescentes validada para adolescentes brasileños, en las dimensiones del autoconcepto físico y global, y medidas medidas antropométricas de masa corporal y estatura para la verificación del IMC (índice de masa corporal), pliegues cutáneos para el porcentual de masa corporal grasa y perímetros para la circunferencia de cintura. Se encontró una correlación pequeña e inversa entre las variables autoconcepto físico y circunferencia de cintura corroborando con otros estudios que apuntar resultados similares.

513 downloads

Tryptophan overloading activates brain regions involved with cognition, mood and anxiety
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

SILVA, LUANA C.A.

; VIANA, MILENA B.

; ANDRADE, JOSÉ S.

; SOUZA, MELYSSA A.

; CÉSPEDES, ISABEL C.

; D’ALMEIDA, VÂNIA

Anais da Academia Brasileira de Ciências

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2017, Volume 89 N. 1 Pages 273 - 283

Abstract: En | Text: En | PDF: En

ABSTRACT Tryptophan is the only precursor of serotonin and mediates serotonergic activity in the brain. Previous studies have shown that the administration of tryptophan or tryptophan depletion significantly alters cognition, mood and anxiety. Nevertheless, the neurobiological alterations that follow these changes have not yet been fully investigated. The aim of this study was to verify the effects of a tryptophan-enriched diet on immunoreactivity to Fos-protein in the rat brain. Sixteen male Wistar rats were distributed into two groups that either received standard chow diet or a tryptophan-enriched diet for a period of thirty days. On the morning of the 31st day, animals were euthanized and subsequently analyzed for Fos-immunoreactivity (Fos-ir) in the dorsal and median raphe nuclei and in regions that receive serotonin innervation from these two brain areas. Treatment with a tryptophan-enriched diet increased Fos-ir in the prefrontal cortex, nucleus accumbens, paraventricular hypothalamus, arcuate and ventromedial hypothalamus, dorsolateral and dorsomedial periaqueductal grey and dorsal and median raphe nucleus. These observations suggest that the physiological and behavioral alterations that follow the administration of tryptophan are associated with the activation of brain regions that regulate cognition and mood/anxiety-related responses.

https://doi.org/10.1590/0001-3765201720160177 2778 downloads

Caracterización de capas de GaAs y GaAsMn depositadas por magnetron sputtering
Facebook Twitter

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

Metrics
- SciELO Analytics

Pulzara-Mora, C.A.

; Doria-Andrade, J.

; Pulzara-Mora, A.

; Bernal-Correa, R.

; Rosales-Rivera, A.

; López-López, M.

Superficies y vacío

Journal Metrics
- Sobre o periódico
- SciELO Analytics

sep 2016, Volume 29 N. 3 Pages 98 - 104

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

Abstract: In this work we present results on the growth and characterization of layers of GaAs and the semi-magnetic alloy GaAsMn deposited by magnetron sputtering over silicon (100) substrate. X ray diffraction patterns of GaAs and GaAsMn indicate that GaAs layer is polycrystalline with preferential orientation along the (111) direction, while the GaAsMn layer has a phase of GaAs (002) and a phase associated to MnAs. The Raman spectra of GaAs and GaAsMn evidence LO and TO vibrational modes associated to GaAs and other vibrational modes associated to defects in the GaAsMn layer. The spectra for X ray photoelectrons indicate that the surface of GaAs layer contains bonds at 18.45 and 18.46 eV due to Ga3d and As3d, respectively. SIMS measurements in deepth profile of concentration on the GaAsM layer indicate signals associated with Ga, As and Mn elements, being a good indicative on the formation of the ternary alloy GaAsMn. The magnetic characterization showd that GaAs layer has a diamagnetic behaviour at low and high temperatures, while the GaAsMn layer exhibits a paramagnetic behaviour from 50 to 300 K. The M vs T curve shows an anomalous behaviour below 50 K, where the increment on magnetization is owed to an increase in spin polarization. Finaly, it is concluded that it is feasible to obtain GaAs and GaAsMn polycrystalline layers with interesting physical properties using a non epitaxial deposition technique.

Resumen: En este trabajo presentamos los resultados de crecimiento y caracterización de capas de GaAs y aleaciones semi-magnéticas de GaAsMn depositadas por magnetron sputtering sobre un substrato de silicio (100). Los patrones de difracción de rayos X de GaAs y GaAsMan indican que la capa de GaAs es policristalina y presenta una orientación preferencial a lo largo de la dirección (111), mientras que la capa de GaAsMn tiene una fase de GaAs (002) y una fase asociada a MnAs. Los espectros Raman de GaAs y GaAsMn evidencian modos vibracionales LO y TO asociados a GaAs y otros modos vibracionales asociados a defectos en la capa de GaAsMn. Los espectros de electrones de rayos X indican que la superficie de la capa GaAs contiene enlaces de 18.45 y 18.46 eV debidos a Ga3d y As3d, respectivamente. Las medidas SIMS en perfil de concentración vs profundidad sobre la capa de GaAsMn indican señales asociadas a los elementos Ga, As y Mn, siendo éste un buen indicativo de la formación de la aleación ternaria GaAsMn. La caracterización magnética demostró que la capa de GaAs tiene un comportamiento diamagnético a bajas y altas temperaturas, mientras que la capa de GaAsMn exhibe un comportamiento paramagnético desde 50 hasta 300 K. La curva de M vs. T presenta un comportamiento anómalo por debajo de 50 K, donde el aumento de la magnetización se debe a un incremento de la polarización de espines. Finalmente, se concluye que es posible obtener capas de GaAs y GaAsMn policristalinas con propiedades físicas interesantes utilizando una técnica de depósito no epitaxial.

229 downloads

Comparison of six-minute walk test in children with moderate/severe asthma with reference values for healthy children
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Andrade, Lívia Barboza de

; Silva, Diogo A.R.G.

; Salgado, Taíza L.B.

; Figueroa, José N.

; Lucena-Silva, Norma

; Britto, Murilo C.A.

Jornal de Pediatria

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2014, Volume 90 N. 3 Pages 250 - 257

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

OBJETIVO: comparar o desempenho físico e cardiorrespiratório do teste de caminhada de seis minutos (TC 6 min) em crianças asmáticas com valores de referência para saudáveis da mesma faixa etária e correlacioná-los com variáveis intervenientes.MÉTODOS: estudo transversal, prospectivo,em crianças com asma moderada/grave, entre seis e 16 anos, em acompanhamento ambulatorial. Coletaram-se dados demográficos e espirométricos. Os pacientes responderam questionário de qualidade de vida em asma (PAQLQ) e nível de atividade física basal. O TC 6 min foi realizado segundo recomendações da American Thoracic Society. Para comparações de médias usou-se teste t e correlação de Pearson para analisar o TC 6 min com variáveis estudadas. Nível de significância de 5%.RESULTADOS: incluídas 40 crianças, 52,5% meninos, 70% eutróficas e sedentárias. A média deidade 11,3 ± 2,1 anos, altura 1,5 ± 0,1 m e peso 40,8 ± 12,6 Kg. A média da distância percorrida no TC 6 min foi significativamente inferior correspondendo a 71,9% ± 19,7 dos valores previstos, onde as crianças sedentárias exibiram os piores valores. A diferença entre a distância percorrida no teste e os valores preditos mostrou correlação positiva com a idade (r = 0,373, p = 0,018) e negativa com a frequência cardíaca ao final do teste (r = -0,518, p < 0,001). Na avaliação da qualidade de vida, os valores do quesito limitações das atividades físicas, demonstraram pior pontuação com correlação negativa com a diferença das distâncias percorridas (r = -0,311,p = 0,051).CONCLUSÕES: o desempenho do TC6 min em crianças asmáticas avaliado através da distância percorrida é significativamente inferior aos valores previstos para saudáveis da mesma faixa etária, sendo influenciado diretamente pelo sedentarismo.

OBJECTIVE:to compare physical performance and cardiorespiratory responses in the six-minute walk test (6MWT) in asthmatic children with reference values for healthy children in the same age group, and to correlate them with intervening variables.METHODS:this was a cross-sectional, prospective study that evaluated children with moderate/severe asthma, aged between 6 and 16 years, in outpatient follow-up. Demographic and spirometric test data were collected. All patients answered the pediatric asthma quality of life (QoL) questionnaire (PAQLQ) and level of basal physical activity. The 6MWT was performed, following the American Thoracic Society recommendations. Comparison of means was performed using Student's t-test and Pearson's correlation to analyze the 6MWT with study variables. The significance level was set at 5%.RESULTS:40 children with moderate or severe asthma were included, 52.5% males, 70% with normal weight and sedentary. Mean age was 11.3 ± 2.1 years, mean height was 1.5 ± 0.1 m, and mean weight was 40.8 ± 12.6 Kg. The mean distance walked in the 6MWT was significantly lower, corresponding to 71.9% ± 19.7% of predicted values; sedentary children had the worst values. The difference between the distance walked on the test and the predicted values showed positive correlation with age (r = 0.373, p = 0.018) and negative correlation with cardiac rate at the end of the test (r = -0.518, p < 0.001). Regarding QoL assessment, the values in the question about physical activity limitations showed the worst scores, with a negative correlation with walked distance difference (r = -0.311, p = 0.051).CONCLUSIONS:asthmatic children's performance in the 6MWT evaluated through distance walked is significantly lower than the predicted values for healthy children of the same age, and is directly influenced by sedentary life style.

https://doi.org/10.1016/j.jped.2013.08.006 4228 downloads

Comparison of six-minute walk test in children with moderate/severe asthma with reference values for healthy children
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Andrade, Lívia Barboza de

; Silva, Diogo A.R.G.

; Salgado, Taíza L.B.

; Figueroa, José N.

; Lucena-Silva, Norma

; Britto, Murilo C.A.

Jornal de Pediatria

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2014, Volume 90 N. 2 Pages 250 - 257

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

https://doi.org/10.1016/j.jped.2013.08.006 989 downloads Cited 8 times in SciELO

Selectivity of clomazone and S-metolachlor applied after cassava pruning
Facebook Twitter

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

Metrics
- SciELO Analytics

Costa, N.V.

; Andrade, D.C.

; Sontag, D.A.

; Scariot, C.A.

; Tsuzuki, L.H.

Planta Daninha

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2013, Volume 31 N. 4 Pages 979 - 985

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

Objetivou-se neste estudo avaliar a seletividade do clomazone em duas formulações e do S-metolachlor aplicados em diferentes tamanhos de brotos depois da poda da mandioca Baianinha. O delineamento experimental utilizado foi o de blocos ao acaso, em esquema fatorial 5 x 2 (5 tratamentos x 2 tamanhos de brotos após a poda - 10 e 33 cm), com quatro repetições. Os herbicidas avaliados foram: clomazone (suspensão de encapsulado 900 g ha-1), clomazone (suspensão de encapsulado 1.080 g ha-1), clomazone (concentrado emulsionável 900 g ha-1), S-metolachlor (1.920 g ha-1), além da testemunha sem aplicação. Durante a condução do experimento, todas as parcelas foram mantidas livres da interferência das plantas daninhas por meio de capinas manuais. Concluiu-se que ambas as formulações do clomazone e o S-metolachlor apresentaram-se seletivas quando aplicadas em ambos os tamanhos de brotos avaliados; no entanto, a aplicação do S-metolachlor em brotos de 33 cm proporcionou maior seletividade às plantas de mandioca Baianinha.

The objective of this work was to evaluate the selectivity of clomazone in two formulations and S-metolachlor applied on shoots of different sizes after pruning of 'Baianinha' cassava. The experiment was arranged in a randomized block design in a factorial 5 x 2 (5 treatments x 2 sizes of shoots after pruning - 10 and 33 cm) with four replications. The herbicides evaluated were: clomazone (encapsulated suspension - 900 g h-1), clomazone (encapsulated suspension - 1,080 g ha-1), clomazone (emulsifiable concentrate 900 g ha-1), S-metolachlor (1,920 g ha-1) and an untreated control. During the experiment, all plots were kept free of weed interference by hand weeding. It was concluded that both the formulations of clomazone and S-metolachlor were selective when applied on both the shoot sizes evaluated. However, the application of S-metolachlor on 33 cm shoots gave higher selectivity to 'Baianinha' cassava plants.

1657 downloads Cited 2 times in SciELO

Characterization of the level fluctuations in a physical model of the steel continuous casting mold through image processing
Facebook Twitter

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

Metrics
- SciELO Analytics

Miranda-Tello, J.R.

; Sánchez-Rangel, F.

; Real-Ramírez, C.A.

; Khatchatourov, G.

; Aragón-Lezama, J.A.

; Hoyos-Reyes, L.F.

; Andrade-González, E.A.

; González-Trejo, J.I.

Revista mexicana de física

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2012, Volume 58 N. 2 Pages 166 - 173

Abstract: En | Text: En | PDF: En

In this work is characterized the periodic behavior of the liquid level inside a scaled cold-model of the mold section of a steel continuous casting machine, which uses water as working fluid. The models are designed in order to simulate the dynamic forces acting on the molten steel inside a mold of continuous casting. The force magnitude can induce choppy flow, waves and vortex formation in the mold. The experimental model uses a closed-loop hydraulic configuration. In the mold, the inlet and the outlet water flow rates are the same. This configuration resembles a perfect control of the liquid level inside the water model. A high-speed video camera was used to get several video clips of the movement of the water level profile. Several techniques were tested in order to obtain the best lighting conditions for recording the water movement. The edge-detection technique of Sobel was used to determine the profile of the liquid level in each one of the images recorded. The analysis of the dynamic behavior of the water profile showed that the fluctuations of the liquid level inside the mold have a complex structure, which is repeated over large time periods.

1100 downloads

10.

Atmospheric Pollution in the Tula Industrial Corridor studied using a biomonitor and nuclear analytical techniques
Facebook Twitter

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

Metrics
- SciELO Analytics

Martínez-Carrillo, M.A.

; Solís, C.

; Andrade, E.

; Beltrán-Hernández, R.I.

; Isaac-Olivé, K.

; Lucho-Constantino, C.A.

; López Reyes, M.C.

; Longoria, L.C.

Revista mexicana de física

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2011, Volume 57 Suppl. 1 Pages 75 - 79

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

This study deals with the application of nuclear analytical techniques to analyze trace elements in the biological monitor Tillandsia usneoides. Biological monitors provides an alternative advantageous way of particulate matter sampling in air pollution studies, since there is no need of special sampling devices, accumulation time can be as long as desired. T. usneoides, which occurs naturally throughout México, was used to monitor air quality of Tula-Vito-Apasco (TVA) industrial corridor at central México. This area is considered one of the critical zones of the country because of atmospheric contaminants high concentration. Particulate matter is regulated by Mexican norms, but its chemical composition is not. Plants were transplanted from a clean environment to four sites at the TVA corridor, and exposed for 12 weeks from February to April 2008. Trace element accumulation of plants was determined by Particle induced X ray Emission PIXE and Neutron Activa-tion Analysis (NAA). Results reveal differences in trace elements distribution among sites in the TVA corridor. Furthermore, anthropogenic elements (S, V) and crustal elements (Ca) in T. usneoides exhibit high levels. Highly toxic elements such as Hg, As and Cr although present at trace levels, showed un enrichment relative to the initial values, when transplanted to the TVA corridor. Results show that monitoring with T. usneoides allows a first approximation of air sources to provide insights of the atmospheric pollution in the TVA corridor.

Este estudio aborda la aplicación de técnicas nucleares para analizar elementos traza en el monitor biológico Tillandsia usneoides (heno). El uso de monitores biológicos proporciona una alternativa ventajosa en el muestreo de material particulado en estudios de contaminación del aire, ya que no requiere dispositivos especiales de muestreo y el tiempo de monitoreo puede ser tan largo como se desee. T. usneoides que crece en todo el país, se utilizo para estudiar la calidad del aire del corredor Tula-Vito-Apasco (TVA) en el estado de Hidalgo. Esta área es considerada zona crítica debido a la alta concentración de contaminantes atmosféricos. Las plantas fueron trasplantadas desde un entorno limpio a cuatro sitios en el corredor de TVA y expuestas durante 12 semanas de febrero a abril de 2008. La acumulación de elementos traza en plantas sin lavar y secas se determino por PIXE y NAA. Los resultados obtenidos revelan diferencias en la distribución de elementos traza entre los sitios del corredor TVA y muestran que el monitoreo con T. usneoides permite establecer una primera aproximación de fuentes de contaminantes atmosféricos.

1568 downloads

11.

Obstrução estrangulada de jejuno como complicação pós-operatória de ressecção do cólon maior eqüino: relato de caso
Facebook Twitter

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

Metrics
- SciELO Analytics

De Marval, C.A.

; Matos, M.R.F.

; Andrade, V.G.

; Leal, B.B.

; Alves, G.E.S.

; Oliveira, H.P.

; Faleiros, R.R.

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2007, Volume 59 N. 3 Pages 641 - 646

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

Em uma égua, submetida à laparotomia para correção de vólvulo do cólon maior, realizou-se enterectomia próximo ao ligamento cecocólico seguida de enteroanastomose término-terminal. Nas primeiras 24 horas do período pós-operatório, houve piora dos sinais clínicos, com ocorrência de dor, refluxo enterogástrico e agravamento do quadro de endotoxemia. Frente ao prognóstico desfavorável, optou-se pela eutanásia. Durante a necropsia, não foram constatadas falhas na enteroanastomose ou sinais de peritonite séptica. Observou-se encarceramento de uma alça de jejuno, que se apresentava justaposta à extremidade livre da prega cecocólica e comprimida entre o corpo do ceco e o cólon ventral direito remanescente, caracterizando obstrução do tipo estrangulada. Esse achado foi compatível com o agravamento do quadro clínico observado no pós-operatório. Essa ocorrência sugere a necessidade de uma adaptação na técnica de ressecção do cólon maior, de forma a reduzir o espaço cecocólico e evitar um possível encarceramento de alças de intestino delgado.

A mare subjected to laparotomy to treat a large colon volvulus had the large colon transected close to the cecocolic ligament followed by anastomosis using end-to-end technique. Despite intensive care, worsening of the clinical signs occurred during the first 24 hours after surgery including pain, enterogastric reflux and grievance of the endotoxemia symptoms. Euthanasia was performed. During necropsy, no signs of failure of the anastomosis and peritonitis were found but a strangulated segment of jejunum was observed adjacent to the cecocolic fold and compressed by the body of the cecum and the reminiscent rigth ventral colon. This finding was associated with the worsening of the clinical signs during the post-operative period. This report indicates that an adaptation in the large colon resection technique reducing the cecocolic space may be beneficial in avoiding such complication.

10561 downloads

12.

Avaliação da atividade antibacteriana e triagem fitoquímica das flores de Acacia podalyriifolia A. Cunn. ex G. Don Leguminosae-Mimosoideae
Facebook Twitter

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

Metrics
- SciELO Analytics

Andrade, C.A.

; Peitz, C.

; Cúnico, M.

; Carvalho, J.L.S.

; Abrahão, W.M.

; Miguel, O.G.

; Miguel, M.D.

; Kerber, V.A.

Revista Brasileira de Farmacognosia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2005, Volume 15 N. 1 Pages 13 - 15

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

A atividade antibacteriana das flores da Acacia podalyriifolia A. Cunn. (Leguminosae) foi avaliada pelo método de difusão em disco. As bactérias testadas foram: Staphylococcus aureus (ATCC 6538), Staphylococcus epidermidis (ATCC 1228), Escherichia coli (ATCC 11229) e Pseudomonas aeruginosa (ATCC 27853). O meio de cultura utilizado foi ágar Müeller-Hinton. Foram utilizados discos de papel (6 mm de diâmetro) impregnados com 1000, 500, 250 e 125 mg dos extratos: Etanol Bruto, fração Acetato de Etila e fração Diclorometano obtidas a partir do extrato etanólico bruto. Os resultados indicam que as amostras avaliadas exercem ação contra as cepas gram positivo testadas, em graus variáveis sendo que a fração Acetato de Etila apresentou maior atividade. A triagem fitoquímica indicou a presença de fenóis e flavonoides nas flores de A. podalyriifolia.

The antibacterial activity of the flowers of Acacia podalyriifolia A. Cunn. (Leguminosae) was evaluated through the gel diffusion method. The bacteria tested were: Staphylococcus aureus (ATCC 6538), Staphylococcus epidermidis (ATCC 1228), Escherichia coli (ATCC 11229) and Pseudomonas aeruginosa (ATCC 27853). The culture media was agar Müeller-Hinton. Paper discs (6 mm in diameter) with 1000, 500, 250 e 125 mg of the tested extracts (crude ethanolic and its fractions; Ethyl Acetate and Dichloromethane) were used. The results indicated action against the gram-positive tested strains in different levels. The Ethyl Acetate extract showed a higher activity. Phenols and flavonoids were detected in the flowers of A. podalyriifolia through phytochemical screening.

2724 downloads Cited 6 times in SciELO

13.

Biological evaluation of recombinant human erythropoietin in pharmaceutical products
Facebook Twitter

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

Metrics
- SciELO Analytics

Ramos, A.S.

; Schmidt, C.A.

; Andrade, S.S.

; Fronza, M.

; Rafferty, B.

; Dalmora, S.L.

Brazilian Journal of Medical and Biological Research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

nov 2003, Volume 36 N. 11 Pages 1561 - 1569

Abstract: En | Text: En | PDF: En

The potencies of mammalian cell-derived recombinant human erythropoietin pharmaceutical preparations, from a total of five manufacturers, were assessed by in vivo bioassay using standardized protocols. Eight-week-old normocythemic mice received a single subcutaneous injection followed by blood sampling 96 h later or multiple daily injections with blood sampling 24 h after the last injection. Reticulocyte counting by microscopic examination was employed as the end-point using the brilliant cresyl blue or selective hemolysis methods, together with automated flow cytometry. Different injection schedules were investigated and dose-response curves for the European Pharmacopoeia Biological Reference Preparation of erythropoietin were compared. Manual and automated methods of reticulocyte counting were correlated with respect to assay validity and precision. Using 8 mice per treatment group, intra-assay precision determined for all of the assays in the study showed coefficients of variation of 12.1-28.4% for the brilliant cresyl blue method, 14.1-30.8% for the selective hemolysis method and 8.5-19.7% for the flow cytometry method. Applying the single injection protocol, a combination of at least two independent assays was required to achieve the precision potency and confidence limits indicated by the manufacturers, while the multiple daily injection protocol yielded the same acceptable results within a single assay. Although the latter protocol using flow cytometry for reticulocyte counting gave more precise and reproducible results (intra-assay coefficients of variation: 5.9-14.2%), the well-characterized manual methods provide equally valid alternatives for the quality control of recombinant human erythropoietin therapeutic products.

5978 downloads Cited 1 time in SciELO

14.

The gravitational wave detector "Mario Schenberg": status of the project
Facebook Twitter

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

Metrics
- SciELO Analytics

Aguiar, O.D.

; Andrade, L.A.

; Camargo Filho, L.

; Costa, C.A.

; Araujo, J.C.N. de

; Rey Neto, E.C. del

; Souza, S.T. de

; Fauth, A.C.

; Frajuca, C.

; Frossati, G.

; Furtado, S.R.

; Furtado, V.G.S.

; Magalhães, N.S.

; Marinho Jr., R.M.

; Matos, E.S.

; Meliani, M.T.

; Melo, J.L.

; Miranda, O.D.

; Oliveira Jr., N.F.

; Ribeiro, K.L.

; Salles, K.B.M.

; Stellati, C.

; Velloso Jr., W.F.

Brazilian Journal of Physics

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2002, Volume 32 N. 4 Pages 866 - 868

Abstract: En | Text: En | PDF: En

The first phase of the Brazilian Graviton Project is the construction and operation of the gravitational wave detector Mario Schenberg at the Physics Institute of the University of São Paulo. This gravitational wave spherical antenna is planned to feature a sensitivity better than h = 10-21 Hz-1/2 at the 3.0-3.4 kHz bandwidth, and to work not only as a detector, but also as a testbed for the development of new technologies. Here we present the status of this detector.

2078 downloads Cited 1 time in SciELO

15.

TRAP-silver staining, a highly sensitive assay for measuring telomerase activity in tumor tissue and cell lines
Facebook Twitter

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

Metrics
- SciELO Analytics

Dalla Torre, C.A.

; Maciel, R.M.B.

; Pinheiro, N.A.

; Andrade, J.A.D.

; de Toledo, S.R.C.

; Villa, L.L.

; Cerutti, J.M.

Brazilian Journal of Medical and Biological Research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jan 2002, Volume 35 N. 1 Pages 65 - 68

Abstract: En | Text: En | PDF: En

Measurement of telomerase activity in clinically obtained tumor samples may provide important information for use as both a diagnostic marker and a prognostic indicator for patient outcome. In order to evaluate telomerase activity in tumor tissue without radiolabeling the product, we developed a simple telomeric repeat amplification protocol-silver-staining assay that is less time-consuming, is safe and requires minimal equipment. In addition, we determined the sensitivity of the silver-staining method by using extracts of telomerase-positive thyroid carcinoma cell lines which were serially diluted from 5,000 to 10 cells. Telomerase activity was also assayed in 19 thyroid tumors, 2 normal controls and 27 bone marrow aspirates. The results indicate that the technique permits the detection of telomerase activity from 5000 to as few as 10 cells. We propose that it could be immediately applicable in many laboratories due to the minimal amount of equipment required.

3472 downloads Cited 1 time in SciELO

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 »