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Id: biblio-1147554
Autor: N-4796-2018Ávila Maltagliati, Liliana; Barbosa Fagundes, Igor Geoffroy; I-7229-2016Retamal-Valdés, Belén; Pereira da Silva, Hélio Doyle; Patel, Mayara; A-8735-2014Nahás-Scocate, Ana Carla Raphaelli; Matias, Murilo.
Título: Análisis de flexión en alambres de níquel-titanio con y sin propiedades de transformación térmica / Bending analysis of nickel-titanium wires with and no thermal transformation properties
Fonte: Ortodoncia;84(167):20-24, jun. 2020. ilus, tab.
Idioma: es.
Resumo: Objetivo: Evaluar el comportamiento de los alambres de aleación de níquel-titanio con y sin propiedades de transformación térmica en la relación carga/deflexión. Materiales y método: Para ello, 30 segmentos de alambres de níquel-titanio con calibre .014" y 30 mm de largo fueron cortados, conformando 10 segmentos de alambre Flexy NiTi de Orthometric®, 10 segmentos Flexy Copper NiTi termoactivado y 10 segmentos CuNiTi de OrmcoTM. Se usó una máquina universal de ensayos Instron® para analizar el comportamiento de carga y deflexión de los segmentos en una prueba de tres puntos, registrando las fuerzas alcanzadas en 0,5 mm: 1 mm, 2 mm y 4 mm de deflexión. Resultados: Hubo una diferencia estadísticamente significativa entre todos los alambres y entre todas las deflexiones, ya que el alambre Flexy Cooper NiTi presentó la menor carga entre todas las deflexiones analizadas. Conclusión: Se concluye que los alambres termoactivados alcanzan fuerzas más leves, lo que los hace más apropiados para alineaciones iniciales, las cuales requieren un mayor rango de deflexión(AU)
Descritores: Fios Ortodônticos
Titânio/análise
Maleabilidade
Temperatura Alta
Má Oclusão
Níquel/análise
-Teste de Materiais
Responsável: AR408.1 - Biblioteca


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Id: biblio-948426
Autor: Chaves, Prínscilla Pâmela Nunes; Santos, Gil Rodrigues dos; Silveira, Márcio Antônio da; Gomes, Luíz Antônio Augusto; Momenté, Valéria Gomes; Nascimento, Ildon Rodrigues.
Título: Reação de genótipos de batata-doce a nematóides de galhas em condições de temperatura elevada / Reaction of genotypes of the sweet potato to nematode galls in high temperature conditions
Fonte: Biosci. j. (Online);29(6):1869-1877, nov./dec. 2013. tab, graf.
Idioma: pt.
Resumo: O objetivo do trabalho foi avaliar a reação de genótipos de batata-doce oriundos de sementes botânicas quanto a nematóides de galhas (M. incognita raça 2 e M. javanica) em condições de temperatura elevada. Para cada espécie de nematóides, foi instalado um experimento utilizando o delineamento experimental inteiramente casualizado com três repetições. Foram avaliados 25 genótipos dos quais 20 são famílias de meios-irmãos (oriundo de um campo de policruzamento); cinco cultivares (Amanda, Ana Clara, Bárbara, Duda e Marcela) e a cultivar de tomate Santa Clara, suscetível aos nematóides. A classificação da resistência foi feita pelo Índice de Reprodução (IR%), no período mais quente do ano (janeiro/fevereiro), sobre condições temperatura média do solo de 26 ºC na região Sul do Estado do Tocantins. Avaliou-se também o número médio de galhas por sistema radicular, tamanho médio das galhas e posicionamento das galhas. Em condição de temperatura elevada, a espécie M. javanica foi mais agressiva do que M. incognita raça 2, originando galhas em maior número e de maior tamanho, principalmente nas raízes secundárias. Os genótipos BDFMI-16, BDFMI-78, Bárbara e Marcela são resistentes a M. incognita raça 2. Para o isolado M. javanica, o genótipo BDFMI-04 e BDFMI-16 e as cultivares Amanda e Duda são classificados como muito resistentes. O genótipo BDFMI-16 resistente a M. incognita raça 2 e M. javanica é promissor para uso no Estado do Tocantins ou então compor programas de melhoramento cujo objetivo é desenvolver genótipos resistentes às duas espécies de nematóides.

The objective of this study was to evaluate the response of sweet potato genotypes derived from botanical seed gall nematode (M. incognita race 2 and M. javanica) in high temperature conditions. For each species of nematodes, an experiment was conducted using completely randomized design with three replications. Were evaluated 25 genotypes of which 20 are half-sib families (coming from a field polycross); five cultivars (Amanda, Ana Clara, Barbara Duda and Marcela) and tomato cultivar Santa Clara, susceptible to nematodes. The classification was made by the resistance Rendering Index (IR%), the hottest period of the year (January/February) on average soil temperature conditions of 26 ° C in the southern region of the State of Tocantins. Also evaluated the mean number of galls per root system galled average size and positioning of the gall. Under high temperature condition, the species M. javanica was more aggressive than M. incognita race 2, causing galls in greater numbers and larger, especially in the secondary roots. Genotypes BDFMI-16, BDFMI-78, and cultivars Barbara and Marcela are resistant M. incognita race 2. To isolate M. javanica, the genotype BDFMI-04 and BDFMI-16 and cultivars Amanda and Duda are classified as very resistant. Genotype BDFMI 16 resistant M. incognita race 2 and M. javanica is promising for use in the State of Tocantins and then compose breeding programs aimed at developing genotypes resistant to both nematode species.
Descritores: Tumores de Planta
Ipomoea batatas
Temperatura Alta
Nematoides
-Tylenchoidea
Melhoramento Vegetal
Genótipo
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1052269
Autor: Feng, Shoushuai; Hou, Shaoxiang; Huang, Xing; Fang, Zheng; Tong, Yanjun; Yang, Hailin.
Título: Insights into the microbial community structure of anaerobic digestion of municipal solid waste landfill leachate for methane production by adaptive thermophilic granular sludge
Fonte: Electron. j. biotechnol;39:98-106, may. 2019. tab, graf, ilus.
Idioma: en.
Projeto: National Natural Science Foundation of China; . Social Development Projects of Jiangsu Province; . Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education; . Key Laboratory of Industrial Biotechnology, Ministry of Education; . Priority Academic Program Development of; . Jiangsu Higher Education Institutions, and Program of Introducing; . Talents of Discipline to Universities.
Resumo: BACKGROUND: The amount of municipal solid waste (MSW) gradually increased along with the rapid development of modern cities. A large amount of landfill leachate are generated with excessive chemical oxygen demand (COD), which create a great deal of pressure on the environment-friendly treatment process. Anaerobic digestion is an ideal technique to solve the above problem. RESULTS: A thermophilic granular sludge was successfully adapted for anaerobic digestion of MSW leachate (from an aging large-scale landfill) for methane production. The COD degradation efficiency improved by 81.8%, while the methane production rate reached 117.3 mL CH4/(g VS d), which was 2.34-fold more than the control condition. The bacterial and archaeal communities involved in the process were revealed by 16S rRNA gene high-throughput pyrosequencing. The richness of the bacterial community decreased in the process of thermophilic granular sludge, while the archaeal community structure presented a reverse phenomenon. The bacterial genus, Methanosaeta was the most abundant during the mesophilic process, while Methanobacterium, Methanoculleus, Methanosaeta and Methanosarcina were more evenly distributed. The more balanced community distribution between hydrogenotrophic and acetotrophic methanogens implied a closer interaction between the microbes, which further contributed to higher methane productivity. The detailed relationship between the key functional communities and anaerobic digestion performances were demonstrated via the multivariate canonical correspondence analysis. Conclusions: With the assistance of adaptive thermophilic granular sludge, microbial community structure was more evenly distributed, while both of COD degradation rate and methane production was improved during anaerobic digestion of MSW landfill leachate.
Descritores: Bactérias Anaeróbias/metabolismo
Resíduos Sólidos
Digestão Anaeróbia
Tratamento de Lodos
Metano/metabolismo
-Esgotos/microbiologia
Bactérias Anaeróbias/isolamento & purificação
Poluentes Químicos da Água
Reação em Cadeia da Polimerase
Área Urbana
Biocombustíveis
Análise da Demanda Biológica de Oxigênio
Temperatura Alta
Anaerobiose
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-910830
Autor: Pereira, Edward Adalid; Morales Gutiérrez, Pamela Edith; Da Silva Aguilar, Alfredo.
Título: Análisis de los efectos de la hipoxia en 236 pilotos durante el entrenamiento fisiológico en cámara hipobárica / Analysis of the effects of hypoxy in 236 pilots during physiological training in hyperbaric chamber
Fonte: Hosp. Aeronáut. Cent;11(2):130-9, 2016. graf.
Idioma: es.
Resumo: Introducción: La hipoxia se define como un estado de deficiencia de oxígeno en el organismo. La reducción de la presión parcial de oxigeno como consecuencia de la reducción de la presión atmosférica con la altitud, establece la hipoxia hipobárica, cuyos síntomas pueden ser estudiados durante el entrenamiento fisiológico de altura. Dicha prueba es una herramienta fundamental, para entrenar a los pilotos mediante equipos en tierra que simulan fielmente las condiciones de un vuelo real, con el propósito de que aprendan a reconocer los síntomas y entrenen la forma de manejarlos cuando estén en vuelo. Ejemplo de este tipo de entrenamiento es el realizado en la cámara de altitud o hipobárica. Objetivos: Analizar los efectos de la hipoxia hipobárica en 236 pilotos de avión. Material y Método: Se tomaron los datos estadísticos de los archivos del departamento de investigación del INMAE de pilotos militares sometidos a la prueba de hipoxia en la cámara hipobárica. Se realizó un estudio retrospectivo, descriptivo, el criterio de inclusión fue de pilotos militares activos sometidos a prueba de hipoxia en cámara hipobárica a una altura de 27.500 que presentaron al menos un síntoma durante la prueba, la muestra final incluyó a 236 casos. Resultados: Se analizaron los datos de 236 pilotos de avión, todos ellos fueron hombres, las edades oscilaron entre 20 y 55 años, la edad media fue de 32 (31,76) años +/-6.8. Los síntomas más frecuentes fueron: calor en general (41.5%), describieron calor en todo el cuerpo y en zonas específicas de las cuales la más frecuente fue la cara (55% del total de calor)le siguieron las manos y las plantas de los pies, parestesias (11.8%), vértigo (9.7%), definida como la dificultad respiratoria con sensación de falta de aires la disnea se presentó en cuarto lugar (8.9%) y también se describieron alteraciones de la visión (7.2%) tales como visión nublada, visión en túnel y visión negra. En cuanto al TUC osciló entre 43 y 226 segundos, el promedio fue de 119 segundos. Conclusiones: Los síntomas más frecuentes fueron Calor sobre todo en la cara, manos y pies, parestesias, vértigo, disnea, alteraciones de la visión, palpitaciones, sudoración, temblor, cianosis, dolor de cabeza, alteraciones cognitivas. El TUC osciló entre 43 y 226 segundos, el promedio fue de 119 segundos. Al comparar el TUC con los grupos de edades establecidos (mayores y menores de 40 años), existe diferencia entre el promedio de los menores de 40 años (121 segundos) y mayores de esa edad (110 segundos) que habla a favor de una relación inversa entre ambas variables, es decir, a mayor edad menor TUC, estadísticamente obtuvimos, con una probabilidad entre 98 y 99 %, que después de los 40 años el tuc disminuye aproximadamente 10%.

Introduction: Hypoxia is defined as a state of oxygen deficiency in the body. The reduction of the oxygen partial pressure as a consequence of the reduction of the atmospheric pressure with the altitude, establishes the hypobaric hypoxia, whose symptoms can be studied during the physiological training of height. This test is a fundamental tool to train pilots using ground equipment that faithfully simulate the conditions of a real flight, so that they learn to recognize the symptoms and train how to handle them when they are in flight. An example of this type of training is that performed in the altitude or hypobaric chamber. Objectives: To analyze the effects of hypobaric hypoxia on 236 aircraft pilots. Material and method: Statistical data were taken from the files of the INMAE research department of military pilots subjected to hypoxia testing in the hypobaric chamber. A retrospective, descriptive study was performed. The inclusion criterion was that of active military pilots who underwent a hypoxia test in a hypobaric chamber at a height of 27,500 who presented at least one symptom during the test. The final sample included 236 cases. Results: We analyzed the data of 236 airplane pilots, all of them men, the ages ranged from 20 to 55 years, the average age was 32 years. The most frequent symptoms were: heat in general, described heat throughout the body and in specific areas of which the most frequent was the face followed by the hands and soles of the feet, paresthesias, vertigo, defined as respiratory difficulty with Sensation of shortness of breath, dyspnea presented in fourth place and also described alterations of vision such as cloudy vision, tunnel vision and black visión Useful time of consciousness (UTC) ranged from 43 to 226 seconds, averaging 119 seconds. Conclusions: The most frequent symptoms were: heat, the most frequent was the face followed by the hands and soles of the feet, paresthesias, vertigo, dyspnea, sweat, palpitations, tremors, cyanosis, headache, cognitive alterations. Useful time of consciousness (UTC) ranged from 43 to 226 seconds, averaging 119 seconds. When comparing UTC with established age groups (older and younger than 40 years), we obtained, with a probability of 98-99%, that after 40 years UTC decreased by approximately 10%.
Descritores: Câmaras de Exposição Atmosférica/efeitos adversos
Pilotos
Hipóxia/complicações
-Sudorese
Percepção Visual
Humanos
Dispneia
Temperatura Alta
Limites: Masculino
Tipo de Publ: Estudo de Avaliação
Responsável: AR295.1 - Biblioteca Dr Anibal E Inchausti


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Texto completo SciELO Chile
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Id: biblio-1058623
Autor: Faúndez-Salazar, Javier; San-Martín-Meza, Evelyn; Salgado-Fernández, Apolo.
Título: Complicaciones de la radioterapia: fenómeno de Lhermitte gatillado por calor: caso clínico / Complications of radiotherapy: Lhermitte phenomenon triggered by heat: report of one case
Fonte: Rev. méd. Chile;147(7):928-931, jul. 2019. graf.
Idioma: es.
Resumo: Lhermitte phenomenon is a neurological symptom described as a sensation of electric shock that radiates from the back towards the extremities, which appears when a patient flexes the neck. A transient myelopathy as a late complication of radiotherapy is associated with this symptom. It appears two to four months after treatment and disappears spontaneously. We report a 45 years old female with a neck malignant melanoma treated with surgery and adjuvant radiotherapy. She experienced the Lhermitte phenomenon that was triggered by heat. This phenomenon must be differentiated from the Uhthoff phenomenon.
Descritores: Dor/etiologia
Neoplasias Cutâneas/diagnóstico
Radioterapia Adjuvante/efeitos adversos
Neoplasias de Cabeça e Pescoço/diagnóstico
Temperatura Alta/efeitos adversos
Melanoma/diagnóstico
-Neoplasias Cutâneas/cirurgia
Neoplasias Cutâneas/radioterapia
Diagnóstico Diferencial
Neoplasias de Cabeça e Pescoço/cirurgia
Neoplasias de Cabeça e Pescoço/radioterapia
Melanoma/cirurgia
Melanoma/radioterapia
Limites: Humanos
Masculino
Pessoa de Meia-Idade
Tipo de Publ: Relatos de Casos
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1128387
Autor: Porto, M. L; Fontenele-Neto, J. D.
Título: Efeito da manipulação térmica durante a incubação sobre as variáveis hematológicas, bioquímica sérica e morfometria da bolsa cloacal de codornas japonesas submetidas ao estresse crônico por calor / Effect of thermal manipulation during incubation on the hematological variables, serum biochemistry and morphometry of cloacal bursa of Japanese quails submitted to chronic heat stress
Fonte: Arq. bras. med. vet. zootec. (Online);72(2):505-516, Mar./Apr. 2020. tab.
Idioma: pt.
Resumo: Objetivou-se avaliar os efeitos da manipulação da temperatura de incubação sobre a resposta imune de codornas desafiadas termicamente após eclosão. Para isso, foram utilizados 540 ovos, distribuídos em três incubadoras, com temperatura de 37,8°C e umidade de 60%. A partir do sexto dia de incubação até a eclosão, as temperaturas foram ajustadas em 37,8°C (padrão), 38,5°C (intermediária) e 39,5°C (alta). Após a eclosão as codornas foram pesadas e distribuídas, em delineamento inteiramente ao acaso, com três temperaturas de incubação (37,8, 38,5 e 39,5°C) e duas temperaturas de ambiente (estresse e termoneutro). Aos 10, 20, 30 e 40 dias, quatro codornas por tratamento foram eutanasiadas para coleta da bolsa cloacal, do fígado e do coração, para se determinar o peso absoluto (g), o peso relativo (%) e a área dos folículos bursais. Sangue foi coletado para realização do hemograma, do leucograma e da bioquímica sérica. Os dados foram analisados e as diferenças entre as médias foram determinadas pelo teste de Tukey a 5%. O estresse térmico por calor, a partir dos 20 dias, promove redução no peso absoluto do fígado, do coração, da bolsa cloacal e na área dos folículos bursais, além de heterofilia, linfopenia e aumento da relação heterófilo/linfócito. Em conclusão, o estresse térmico por calor após 10 dias de idade pode causar imunossupressão.(AU)

The objective of this study was to evaluate the effects of manipulation of the incubation temperature on the immune response of quails challenged thermally after hatching. For this, 540 eggs were distributed in three incubators, with temperature of 37.8°C and 60% humidity. From the 6th day of incubation to hatching the temperatures were adjusted to 37.8°C (standard), 38.5°C (intermediate) and 39.5°C (high). After hatching the quails were weighed and distributed in a completely randomized design with three incubation temperatures (37.8, 38.5 and 39.5°C) and two ambient temperatures (stress and thermoneutral). At 10, 20, 30 and 40 days four quail per treatment were euthanized to collect the cloacal burse, liver and heart to determine the absolute weight (g), relative weight (%) and area of the bursal follicles. Blood was sampled for determination of hemogram, leukogram and serum biochemistry. The data were analyzed and the differences between the means were determined by the Tukey test at 5%. Heat stress from 20 days onwards promotes a reduction in the absolute weight of the liver, heart, cloacal sac and in the area of the follicles. In addition, there was heterofilia, lymphopenia and increased heterophile/lymphocyte ratio. In conclusion, heat stress after 10 days of age can cause immunosuppression.(AU)
Descritores: Cloaca/fisiologia
Transtornos de Estresse por Calor/veterinária
Coturnix/fisiologia
Temperatura Alta
-Tolerância Imunológica
Incubadoras
Contagem de Leucócitos/veterinária
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Texto completo SciELO Brasil
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Id: biblio-1090787
Autor: YOSHIDA, Keiichi.
Título: Influence of alumina air-abrasion for highly translucent partially stabilized zirconia on flexural strength, surface properties, and bond strength of resin cement
Fonte: J. appl. oral sci;28:e20190371, 2020. tab, graf.
Idioma: en.
Resumo: Abstract Objective This study aims to evaluate the influence of different air-abrasion pressures and subsequent heat treatment on the flexural strength, surface roughness, and crystallographic phases of highly translucent partially stabilized zirconia (Y-PSZ), and on the tensile bond strength of resin cement to Y-PSZ. Methodology Fully sintered zirconia specimens were ground with SiC paper (control) and/or air-abraded with 50 µm particles of alumina at 0.1, 0.15, 0.2, or 0.3 MPa or left as-sintered. After air-abrasion at 0.2 MPa (0.2AB), additional specimens were then heated to 1500°C, and held for one hour at this temperature (0.2AB+HT1h). Flexural strength and surface roughness were evaluated. Crystalline phase identification was also carried out using X-ray diffraction. Bonded zirconia specimens with self-adhesive resin cement were stored in distilled water at 37°C for 24 h, either with or without aging (thermal cycling 4-60°C/20000). Results were analyzed statistically by ANOVA and Tukey-Kramer tests. Results The flexural strength decreased with the increase in air-abrasion pressure, while in contrast, the surface roughness increased. The lowest flexural strength and the highest roughness value were found for the 0.2AB and 0.3AB groups, respectively. All groups contained cubic-, tetragonal ( t )-, and rhombohedral ( r )-ZrO2 phases with the exception of the as-sintered group. Upon increasing the air-abrasion pressure, the relative amount of the r -ZrO2 phase increased, with a significant amount of r -ZrO2 phase being detected for the 0.2AB and 0.3AB groups. The 0.2AB+HT1h group exhibited a similar flexural strength and t -ZrO2 phase content as the as-sintered group. However, the 0.2AB group showed a significantly higher tensile bond strength (p<0.05) than the 0.2AB+HT1h group before and after aging. Conclusion Micromechanical retention by alumina air-abrasion at 0.2 MPa, in combination with chemical bonding of a resin to highly translucent Y-PSZ using a MDP-containing resin cement may enable durable bonding.
Descritores: Zircônio/química
Colagem Dentária/métodos
Cimentos de Resina/química
Abrasão Dental por Ar/métodos
Óxido de Alumínio/química
-Valores de Referência
Propriedades de Superfície
Resistência à Tração
Difração de Raios X/métodos
Teste de Materiais
Reprodutibilidade dos Testes
Análise de Variância
Microscopia Confocal/métodos
Resistência à Flexão
Temperatura Alta
Responsável: BR28.1 - Serviço de Biblioteca e Documentação Professor Doutor Antônio Gabriel Atta


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Id: biblio-1056595
Autor: YOSHIDA, Keiichi.
Título: Influence of alumina air-abrasion for highly translucent partially stabilized zirconia on flexural strength, surface properties, and bond strength of resin cement
Fonte: J. appl. oral sci;28:e20190371, 2020. tab, graf.
Idioma: en.
Resumo: Abstract Objective This study aims to evaluate the influence of different air-abrasion pressures and subsequent heat treatment on the flexural strength, surface roughness, and crystallographic phases of highly translucent partially stabilized zirconia (Y-PSZ), and on the tensile bond strength of resin cement to Y-PSZ. Methodology Fully sintered zirconia specimens were ground with SiC paper (control) and/or air-abraded with 50 µm particles of alumina at 0.1, 0.15, 0.2, or 0.3 MPa or left as-sintered. After air-abrasion at 0.2 MPa (0.2AB), additional specimens were then heated to 1500°C, and held for one hour at this temperature (0.2AB+HT1h). Flexural strength and surface roughness were evaluated. Crystalline phase identification was also carried out using X-ray diffraction. Bonded zirconia specimens with self-adhesive resin cement were stored in distilled water at 37°C for 24 h, either with or without aging (thermal cycling 4-60°C/20000). Results were analyzed statistically by ANOVA and Tukey-Kramer tests. Results The flexural strength decreased with the increase in air-abrasion pressure, while in contrast, the surface roughness increased. The lowest flexural strength and the highest roughness value were found for the 0.2AB and 0.3AB groups, respectively. All groups contained cubic-, tetragonal ( t )-, and rhombohedral ( r )-ZrO2 phases with the exception of the as-sintered group. Upon increasing the air-abrasion pressure, the relative amount of the r -ZrO2 phase increased, with a significant amount of r -ZrO2 phase being detected for the 0.2AB and 0.3AB groups. The 0.2AB+HT1h group exhibited a similar flexural strength and t -ZrO2 phase content as the as-sintered group. However, the 0.2AB group showed a significantly higher tensile bond strength (p<0.05) than the 0.2AB+HT1h group before and after aging. Conclusion Micromechanical retention by alumina air-abrasion at 0.2 MPa, in combination with chemical bonding of a resin to highly translucent Y-PSZ using a MDP-containing resin cement may enable durable bonding.
Descritores: Zircônio/química
Colagem Dentária/métodos
Cimentos de Resina/química
Abrasão Dental por Ar/métodos
Óxido de Alumínio/química
-Valores de Referência
Propriedades de Superfície
Resistência à Tração
Difração de Raios X/métodos
Teste de Materiais
Reprodutibilidade dos Testes
Análise de Variância
Microscopia Confocal/métodos
Resistência à Flexão
Temperatura Alta
Responsável: BR28.1 - Serviço de Biblioteca e Documentação Professor Doutor Antônio Gabriel Atta


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Id: biblio-982687
Autor: Silva, Rosalina Helena; Ferreira, Rondinele Alberto dos Reis.
Título: Produção de arroz instantâneo por desidratação / Production of instant rice by dehydration
Fonte: Hig. aliment;30(252/253):157-162, 29/02/2016. ilus, tab.
Idioma: pt.
Resumo: Existem vários métodos de processamento de arroz instantâneo que consistem em pré-cozinhar o arroz polido e, após, desidratá-lo até teor de umidade de no máximo 15%. Sua reconstituição consiste no processo de cozimento rápido em água na temperatura de ebulição (98 °C), obtendo um produto prático e de rápida preparação. O objetivo desta pesquisa foi o desenvolvimento de um processo para a obtenção de arroz instantâneo a nível laboratorial, quantificando as variáveis necessárias para a operação de pré-cozimento e reconstituição do grão para consumo. Foram realizados testes de variação de umidade com o tempo para a construção da curva de secagem do arroz instantâneo e análises de Microscopia Eletrônica de Varredura (MEV) para caracterização do produto. A umidade inicial do arroz pré-cozido com excesso de água foi de 70%. A umidade final, após o processo de secagem a 65ºC, em secador pardal, por 190 minutos foi de 8%. O processo de secagem desenvolvido possibilitou a obtenção de arroz instantâneo com tempo de cozimento de aproximadamente 6 minutos.

There are several methods of processing instant rice .The basic method is to pre-cook the polished rice and after, dehydrate them until the moisture content of at most 15 %. The rice reconstitution consist of a quick cooking process in water at boiling temperature, obtaining a practical and rapid preparation product. The objective of this research was to develop a process for obtaining instant rice at laboratory level by quantifying the variables needed for p re-cooking operation and restoration of grain for consumption. Humidity variation tests were performed with the variable time for the framing of instant rice drying curve, physico-chemical analysis and SEM for product characterization and microbiological shelf life to test (shelf-life). The initial moisture content of the pre-cooked rice with excess water was 70%. The final moisture content after the drying process at 65 ° C in Sparrow dryer for 190 minutos was 8%. The physico-chemical characteristics of dehydrated rice were within the standards for dried cereals as well as microbiological analyzes, colony forming unit for molds and yeasts were absent. The drying process developed allows the obtention of instant rice cooking with the duration time of about 6 minutes.
Descritores: Oryza
Alimentos Preparados
-Microscopia Eletrônica de Varredura
Grão Comestível
Refeições
Conservação de Alimentos
Temperatura Alta
Limites: Humanos
Responsável: BR526.1 - Biblioteca de Saúde Pública


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Id: biblio-1122549
Autor: Atún, Macarena; Martínez, María F; Affranchino, Pablo N.
Título: Eritema ab igne / Erythema ab igne
Fonte: Arch. argent. pediatr;118(5):366-367, oct 2020.
Idioma: es.
Descritores: Eritema
-Temperatura Alta/efeitos adversos
Perna (Membro)/patologia
Limites: Humanos
Masculino
Adolescente
Tipo de Publ: Relatos de Casos
Responsável: AR94.1 - Centro de Información Pediatrica



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