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Texto completo SciELO Costa Rica
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Id: biblio-1041894
Autor: D'Armas, Haydelba; Jaramillo, Carmita; D'Armas, Mayra; Echavarría, Ana; Valverde, Priscilla.
Título: Proximate composition of several macroalgae from the coast of Salinas Bay, Ecuador / Composición proximal de varias macroalgas de la costa de Bahía Salinas, Ecuador
Fonte: Rev. biol. trop;67(1):61-68, Jan.-Mar. 2019. tab.
Idioma: en.
Resumo: Abstract Seaweeds are accessible and important marine organisms found in coastal zones, which have shown their nutritive potential as food or additive. These organisms are relatively abundant in the coastline of Ecuador, but their biochemical composition has not been adequately studied. Therefore, the aim of this research was to evaluate the proximate composition of seven seaweeds (four red, two brown, and one green) collected from Salinas Bay, Ecuador, as a contribution to the knowledge of the nutritional potential of these organisms that belong to this region. Moisture, ash, fat, fiber and protein contents were determined by standard protocols, while carbohydrates were obtained by difference. Energetic content (or caloric profile) was calculated according to the contributions of macromolecules (fats, proteins and carbohydrates). The parameters in highest proportion found in all species were carbohydrates (32.2-45.5 %) and minerals (or ash, 25.8-36.7 %), which play a significant role in human nutrition and the food industry. Furthermore, protein, fiber, and fat contents were relatively low, with values around 4.7-8.0 %, 0.9-5.0 %, and 0.3-3.0 %, respectively, indicating these organisms are a good option as healthy food. According to statistical analysis (ANOVA), each nutritive parameter was significantly different among the species (P < 0.05). Results indicate edible seaweeds from Ecuador have potential as nutritious food that could offer between 1 500-2 000 kcal kg-1, which is higher than many common vegetables.(AU)

Resumen Las macroalgas marinas son organismos accesibles e importantes de las zonas costeras, los cuales han mostrado su potencial como alimentos o aditivos nutritivos. En la línea costera de Ecuador estos organismos son relativamente abundantes, pero su composición bioquímica no ha sido estudiada adecuadamente. En consecuencia, el objetivo de esta investigación fue evaluar la composición proximal de siete especies de macroalgas (cuatro rojas, dos pardas y una verde) que fueron recolectadas en la Bahía de Salinas, Ecuador, como una contribución al conocimiento del potencial nutricional de estos organismos pertenecientes a esta región. Los contenidos de humedad, cenizas, grasa, fibra y proteínas fueron determinadas mediante protocolos estándares, mientras que el contenido de carbohidrato fue obtenido por diferencia. El contenido energético (o perfil calórico) de las macroalgas fue calculado de acuerdo con las contribuciones de las macromoléculas (grasas, proteínas y carbohidratos). Los parámetros encontrados en mayor proporción en todas las especies fueron: carbohidratos (32.2-45.5 %) y minerales (o cenizas, 25.8-36.7 %), los cuales tienen importancia en la nutrición humana y la industria alimentaria. Además, los contenidos de proteína, fibra y grasa fueron relativamente bajos, encontrando valores alrededor de 4.7-8.0, 0.9-5.0, y 0.3-3.0 %, respectivamente, indicando que estos organismos son una buena y saludable opción como alimento. De acuerdo con el análisis estadístico (ANOVA), cada parámetro nutritivo fue significativamente diferente entre especies (P < 0.05). Los resultados indican que las algas comestibles de Ecuador tienen potencial como alimento nutritivo que pueden ofrecer entre 1 500-2 000 kcal kg-1, un aporte energético un poco mayor que muchos vegetales comunes.(AU)
Descritores: Alga Marinha/química
Frutos do Mar
Avaliação Nutricional
-Análise Estatística
Equador
Responsável: BR1.1 - BIREME


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Texto completo SciELO Cuba
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Id: lil-731965
Autor: Pérez-Rivero, Amilcar; Piñon Ramos, Alexander; Morier Díaz, Luis Francisco; Acosta Herrera, Belsy; Valdés Iglesias, Olga; del Barrio Alonso, Gloria.
Título: Actividad antiviral in vitro de un extracto acuoso del alga roja Tricleocarpa fragilis frente a virus influenza A / In vitro antiviral activity of aqueous extract from red seaweed Tricleocarpa fragilis to Influenza A virus
Fonte: Rev. cuba. farm;48(2), abr.-jun. 2014. Ilus, tab.
Idioma: es.
Resumo: INTRODUCCIÓN: los virus influenza constituyen importantes patógenos de humanos que anualmente causan alrededor de 500 000 muertes a nivel mundial. La emergencia de variantes virales resistentes a los fármacos antiinfluenza disponibles, motiva la búsqueda de nuevos antivirales. Los extractos obtenidos a partir de algas pueden ser empleados con esta finalidad, teniendo en cuenta la diversidad de metabolitos secundarios descritos en estos organismos. OBJETIVO: evaluar la actividad antiviral in vitro de un extracto acuoso del alga roja Tricleocarpa fragilis frente a virus influenza A(H1N1) y A(H3N2) MÉTODOS: se determinó el valor de concentración citotóxica media (CC50) empleando el ensayo de reducción de MTT en células MDCK . El cálculo de la concentración inhibitoria media (CI50) se realizó mediante un ensayo de hemaglutinación y de inhibición del efecto citopático (ECP) en células MDCK. El índice selectivo (IS) se calculó a partir de la relación IS= CC 50/CI50. RESULTADOS: el extracto acuoso de T. fragilis no resultó tóxico en las células MDCK, en el rango de concentraciones evaluadas. El alga inhibió la replicación in vitro de virus influenza A(H1N1), A(H3N2) con valores de IS> 11,4 y 106, respectivamente. CONCLUSIONES: el extracto acuoso de T. fragilis posee actividad antiviral frente a virus influenza A y puede ser empleado en el desarrollo de fármacos antiinfluenza novedosos. Este trabajo constituye el primer informe sobre la actividad antiviral de esta especie de alga(AU)

INTRODUCTION: influenza viruses are major human pathogens that cause over 500 000 deaths every year. The emergence of viral variants resistant to approved antiviral drugs has prompted the search for new anti-influenza compounds. Alga could be used as a source for the development of new anti-influenza drugs, taking into account the diversity of secondary metabolites previously described in these organisms. OBJECTIVE: to evaluate the in vitro antiviral activity of aqueous extract of the red seaweed Tricleocarpa fragilisagainst influenza A virus. METHODS: the mean citotoxicity (CC50) concentration of the extract was determined by using the MTT reduction assay in MDCK cells. The mean inhibitory concentration (CI50) was estimated by means of viral protein (hemagglutinin) test and a cytopathic effect inhibition test in MDCK cells. The Selective index was calculated from (SI)= CC50/IC50. RESULTS: T. fragilis was not toxic at the concentrations evaluated in MDCK cells. The aqueous extract inhibited in vitro influenza A(H1N1) and A(H3N2) virus replication with SI values > 11.4 and 106; respectively. CONCLUSIONS: aqueous extract of T. fragilis showed in vitro anti-influenza activity and can be employed as a source for new antiviral drugs. This paper was the first report for the antiviral activity of T. fragilis(AU)
Descritores: Antivirais/uso terapêutico
Vírus da Influenza A/efeitos dos fármacos
Alga Marinha
Limites: Humanos
Responsável: CU1.1 - Biblioteca Médica Nacional


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Texto completo SciELO Brasil
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Id: biblio-886635
Autor: SHI, CHEN-SHAN; SANG, YA-XIN; SUN, GUI-QING; LI, TIAN-YE; GONG, ZHENG-SI; WANG, XIANG-HONG.
Título: Characterization and bioactivities of a novel polysaccharide obtained from Gracilariopsis lemaneiformis
Fonte: An. acad. bras. ciênc;89(1):175-189, Jan,-Mar. 2017. graf.
Idioma: en.
Resumo: ABSTRACT Gracilariopsis lemaneiformis is a type of red alga that contains seaweed polysaccharide agar. In this study, a novel non-agar seaweed polysaccharide fraction named GCP (short of crude polysaccharide obtained from Gracilariopsis lemaneiformis) was isolated from Gracilariopsis lemaneiformis. Structural analysis showed that GCP shows triple helical chain conformation when dissolved in water and has many branches and long side chains. Also, 1→3 linkage is the major linkage and the sugar structures are galactopyranose configurations linked by β-type glycosidic linkages. Two macromolecular substance fractions (GCP-1 and GCP-2) were purified by DEAE Sepharose Fast Flow column chromatography. Moreover, a splenocyte damage assay and splenocyte proliferation assay were used to analyse the bioactivities of GCP, GCP-1 and GCP-2. It was demonstrated that polysaccharides could protect splenocyte damaged by H2O2; GCP-2 shows a greatest protection rate, that is, 92.8%, which significantly enhanced the splenocyte proliferation, and GCP showed the highest proliferation rate, 9.30%. The results suggested that this type of novel non-agar polysaccharide displayed remarkable antioxidant and immunomodulatory activities and early alkali treatment could decrease the activities. It may represent a potential material for health food and clinical medicines.
Descritores: Polissacarídeos/química
Alga Marinha/química
Rodófitas/química
-Polissacarídeos/isolamento & purificação
Valores de Referência
Ensaio de Imunoadsorção Enzimática
Linfócitos/efeitos dos fármacos
Microscopia Eletrônica de Varredura
Espectroscopia de Ressonância Magnética
Estrutura Molecular
Cromatografia Líquida de Alta Pressão
Espectroscopia de Infravermelho com Transformada de Fourier
Ácido Periódico/química
Proliferação de Células/efeitos dos fármacos
Peso Molecular
Limites: Animais
Ratos
Responsável: BR1.1 - BIREME


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Id: lil-713345
Autor: Llanllaya Rojas, Liliana; Melendez Licona, Evelin.
Título: Efecto del consumo de cochayuyo (Chodracanthus chamissoi) sobre los niveles plasmáticos de hierro en rattus norvegicus con anemia ferropénica inducida / Effect of the intake of cochayuyo (Chondracanthus chamisoi) on the plasmatic levels of iron in rattus norvegicus with induced iron deficiency anaemia
Fonte: ReNut;7(1):1182-1197, ene.-mar. 2013. tab, graf.
Idioma: es.
Resumo: Objetivo. Determinar el efecto de la administración de harina de Chondracanthus chamissoi (cochayuyo) sobre los niveles de hierro en Rattus Norveqicus con anemia ferropenia inducida. Materiales y métodos. Estudio de tipo experimental. La población de estudio estuvo constituida por 20 unidades experimentales: Rattus norvegicus de 3 meses de edad y pesos entre 250 9 Y 300 g, las cuales fueron sometidas a un periodo de adaptaci6n de una semana; luego se formaron 4 grupos los cuales recibieron una dieta baja en hierro antes y durante el experimento Los tratamientos administrados fueron: Grupo Control recibió una dosis 1 mg/kg/día de sulfato ferroso, dos Grupos Experimentales que recibieron 1,5 g/kg/día y 1 ,0 g/Kg/día de harina de Cochayuyo respectivamente y el Grupo Blanco que no recibió ningún tratamiento; los tratamientos fueron administrados por vía oroqástrica en ayunas en todos los casos. Se midieron los niveles de Hemoglobina, Ferremia, Transferrina y Porcentaje de Saturaci6n de Transferrina en los cuatro grupos, Resultados. Los valores basales promedio y los valores que confirmaron el cuadro de anemia de los cuatro grupos de estudio no tuvieron diferencia significativa (P mayor igual que 0.05) entre ellos. Los valores promedio obtenidos luego del periodo de recuperación a los 30 días en los grupos Experimentales N°1 (1 ,5g/kg/día de cochayuyo), N°2 (1 ,0g/kg/día de cochayuyo), Grupo Control y Grupo Blanco para hemoglobina fueron 16,92, 13,82, 17.52 Y 8,77(g/dl) respectivamente; para Ferremia 21 0,8,174,39,243 Y 144.2(,u g/dl) respectivamente; para Transferrina 579.87, 621.39, 551.2 Y 612(ug/dl) respectivamente y para el Porcentaje de Saturación de Transferrina 36.36,28.06,44.08 Y 23.56 (%) respectivamente; mostraron una diferencia significativa. Conclusión. El tratamiento con Chondracanthus chamissoi (cochayuyo) tuvo un efecto positive sobre la mejora de las variables estudiadas.

Objetivo. Determine the effect of the administration of Chondracanthus chamissoi (cochayuyo) flour on the plasmatic levels of iron in Rattus norvegicus with induced Iron Deficiency Anaemia. Methods and materials. The research was experimental. The study population was composed by 20 experimental units: 3 years old Rattus norvegicus with weight between 250 9 and 300 9 which were undergone an adaptation period of one week; after that, four groups were formed which received a low iron diet before and after the treatment. The administered treatments were: the control group received a dose of 1 mg/kg/day ferrous sulfate, 2 experimental groups received 1.5 g/kg/day and 1.0 g/Kg/day Cochayuyo flour respectively and the blank group did not received any treatment; in every case, the treatments were administered by oral way and fasting. Finally, hemoglobin, serum iron, transferrin and transferrin saturation percentage were measured in the four groups. Results. There was no significant difference (P greater than or equal to 0.05) in the average baseline values and the values which confirmed the diagnostic of anaemia in the four groups. There was significant difference in the results of hemoglobin 16.92 g/dl, 13.82 g/dl, 17.52 g/dl Y 8.77 g/d; serum iron 210.8 ug/dl, 174.39 ug/dl, 243 ug/dl, 144.2 ug/d); Transferrin 579.87 ug/dl, 621.39 ug/dl, 551.2 ug/dl y 612 ug/dl and Transferrin saturation percentage 36.36 %,28.06 %, 44.08 % Y 23.56 % for the Experimental Group 1, the Experimental Group 2, the Control Group and the blank Group, respectively after 30 day of the period of recovering. Conclusion. The treatment with Chondracanthus chamissoi (cochayuyo) showed an positive effect on the recovering of the study variables.
Descritores: Alga Marinha
Anemia Ferropriva
Heme
Ferro
Ratos
Transferrina
-Epidemiologia Experimental
Grupos Controle
Responsável: PE1.1 - Oficina Universitária de Biblioteca


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Id: biblio-972462
Autor: Yangali Iparraguirre, Miriam Esmeralda.
Título: Propiedades de las algas marinas.
Fonte: Lima; EsSalud; 2007. 20 p.
Idioma: es.
Descritores: Terapias Complementares
Peru
Plantas Medicinais
Alga Marinha/classificação
Alga Marinha/crescimento & desenvolvimento
Limites: Humanos
Tipo de Publ: Estudo de Avaliação
Responsável: PE355.1 - Centro de Documentación e Información
PE355.1; QV 770DP6, Y21


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Id: lil-66617
Autor: Matida, Amabile Kazuko; Zelnik, Raymond; Oliveira, Eurico C. de.
Título: Identificaçäo e caracterizaçäo de manitol em Sargassum cymosum agardh, uma alga parda do litoral brasileiro / Identification and caracterization of mannitol in Sargassum cymosum agardh, a algae of brasilian coast
Fonte: Mem. Inst. Butantan;50(2):47-50, 1988.
Idioma: pt.
Resumo: A ocorrência do manitol foi constatada nos extratos acetônico e etanólico de Sargassum cymosum (Phaeophyta) e sua identificaçäo realizada através de dados espectrais no infravermelho e comparaçäo direta com amostra padräo
Descritores: Alga Marinha
Manitol
Responsável: BR91.2 - Centro de Documentação


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Texto completo SciELO Brasil
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Texto completo
Id: biblio-1001564
Autor: Moni, Sivakumar Sivagurunathan; Alam, Mohammad Firoz; Safhi, M M; Jabeen, Aamena; Sanobar, Syeda; Siddiqui, Rahimullah; Moochikkal, Remesh.
Título: Potency of nano-antibacterial formulation from Sargassum binderi against selected human pathogenic bacteria
Fonte: Braz. J. Pharm. Sci. (Online);54(4):e17811, 2018. tab, graf, ilus.
Idioma: en.
Resumo: Seaweeds constitutes an abundant marine reserve that can be harnessed as source of new pharmaceutical agents. Sargassum binderi Sonder ex J. Agardh is a brown seaweed that is predominantly available from December to March in the Red Sea, Jazan, Kingdom of Saudi Arabia (KSA). In this study, three extracts were isolated using three different techniques, and were subjected to antibacterial assay. The petroleum ether extract of Sargassum binderi was more effective against selected human pathogenic bacteria than the other extracts. Therefore, further studies were focused on developing oleic acid vesicles entrapped with the petroleum ether extract of Sargassum binderi, with the aim of enhancing its penetration property. Oleic acid vesicles were prepared by entrapping petroleum ether extract of Sargassum binderi using film hydration technique. The formulated vesicles were in nanoscale, and so were termed phyto-nanovesicles (PNVs). The spectrum of antibacterial activity of PNVs showed that it is a promising formulation against S. aureus, S. pyogenes, B. subtilis, E. coli, K. pneumoniae and P. aeruginosa. The microbial sensitivities to the PNVs was in the order E.coli > B. subtilis > S. aureus > S. pyogenes > K. pneumoniae > P. aeruginosa. Thus, the PNV formulation possesses promising and effective antimicrobial potential against human pathogenic bacteria
Descritores: Oceano Índico/etnologia
Sargassum/metabolismo
-Alga Marinha/classificação
Antibacterianos
Responsável: BR40.1 - DBD - Divisão de Biblioteca e Documentacão do Conjunto das Químicas


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Texto completo SciELO Brasil
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Texto completo
Id: biblio-951919
Autor: Ebrahimzadeh, Mohammad Ali; Khalili, Masoumeh; Dehpour, Abbas Ali.
Título: Antioxidant activity of ethyl acetate and methanolic extracts of two marine algae, Nannochloropsis oculata and Gracilaria gracilis - an in vitro assay
Fonte: Braz. J. Pharm. Sci. (Online);54(1):e17280, 2018. tab, graf.
Idioma: en.
Resumo: ABSTRACT The aim of this study was to evaluate the antioxidant activity of ethyl acetate and methanolic extracts of two marine algae, Nannochloropsis oculata and Gracilaria gracilis. The extracts were assayed for total phenol and flavonoid content, DPPH free radical scavenging capacity, nitric oxide activity, iron chelation activity, and reducing power activity. Total phenol and flavonoid content were found to be high in both algae. Ethyl acetate extracts of both algae were found to exhibit significant antioxidant activity. Ethyl acetate extract of N. oculata exhibited a good capacity for iron chelation, nitrate oxide, and scavenging DPPH free radicals (72.95±2.30, 73.73±1.76, and 39.03±0.97% inhibition at 400 µg mL-1 respectively).
Descritores: Alga Marinha/classificação
Técnicas In Vitro
Antioxidantes/análise
-Flavonoides/análise
Fenol/análise
Responsável: BR1.1 - BIREME


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Id: biblio-874833
Autor: Jardelino, Cristina; Castro-Silva, Igor Luco; Machado, Callinca Paolla Gomes; Rocha-Leão, Maria Helena; Rossi, Alexandre Malta; Santos, Silvia Rachel de Albuquerque; Granjeiro, José Mauro.
Título: Biocompatibility analysis of a novel reabsorbable alloplastic membrane composed of alginate-Capsul / Análise da biocompatibilidade de uma membrana aloplástica reabsorvível composta de alginato-capsul
Fonte: RGO (Porto Alegre);60(4):423-419, out.-dez. 2012. ilus.
Idioma: en.
Resumo: Objective The aim of this study was to evaluate in vivo the biological response after implantation of a novel alginate-capsule membrane. Methods The material was implanted into subcutaneous tissue of mice (n=15) and after 1, 3 and 9 weeks, the animals were sacrificed and biopsies analyzed with light microscopy, using the stains hematoxylin-eosin, picrosirius and alcian blue pH 2.5. The parameters evaluated were: intensity and kind of inflammatory infiltrate, presence of connective tissue, foreign body reaction, vascularization and biodegradation. Results 1 week after implantation, the following was observed: mixed inflammatory infiltrate, absence of necrosis and beginnings of membrane fragmentation; after 3 weeks, discrete presence of multinuclear giant cells and beginnings of neovascularization; and after 9 weeks there was minor biodegradation associated with the presence of new connective tissue, and persistence of moderate inflammatory reaction observed from beginning to end of the experiment. Conclusion Considering the results obtained, it is possible to conclude that the novel alginate-capsule membrane is partially reabsorbable but with low biocompatibility, requiring more tests to validate its clinical use.

Objetivo Avaliar in vivo a resposta tecidual após a implantação de uma nova membrana de alginato-capsul. Métodos O material foi implantado no tecido subcutâneo de camundongos (n=15) e após 1, 3 e 9 semanas, os animais foram mortos e as biópsias analisadas à microscopia de luz, através de coloração com hematoxilina-eosina, picrosirius e azul de alcian pH 2,5. Os parâmetros avaliados foram: intensidade e tipo de infiltrado inflamatório, presença de tecido conjuntivo, reação de corpo estranho, vascularização e biodegradação. Resultados Após 1 semana da implantação, notou-se infiltrado inflamatório misto, ausência de necrose e início de fragmentação da membrana, em 3 semanas, observou-se presença discreta de células gigantes multinucleadas e início de neovascularização, e em 9 semanas houve pequena biodegradação associada com a presença de novo tecido conjuntivo e persistência de reação inflamatória moderada observada desde o início do experimento. Conclusão Considerando os resultados obtidos concluiu-se que a nova membrana de alginato-capsul é parcialmente reabsorvível, mas com baixa biocompatibilidade, necessitando de mais testes para validar seu uso clínico.
Descritores: Alga Marinha
Engenharia Tecidual
Teste de Materiais
Responsável: BR1354.1 - Biblioteca São Leopoldo Mandic


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Texto completo SciELO Chile
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Id: biblio-1003692
Autor: Quitral, Vilma; Jofré, María José; Rojas, Nayadeth; Romero, Natalia; Valdés, Ismael.
Título: Algas marinas como ingrediente funcional en productos cárnicos / Seaweed as a functional ingredient in meat products
Fonte: Rev. chil. nutr;46(2):181-189, abr. 2019. tab.
Idioma: es.
Resumo: RESUMEN Las algas marinas constituyen un valioso recurso para el desarrollo de productos alimenticios gracias a su composición nutricional, contienen alta concentración de proteínas, vitaminas, minerales y fibra dietética, que en el caso de las algas es particularmente rica en fracción soluble. Las algas además contienen componentes beneficiosos para la salud, como ácidos grasos ω-3 y moléculas bioactivas, con actividad antioxidante, antiinflamatoria, anticancerígena y antidiabética. Además, poseen propiedades tecnológicas, por lo que su incorporación en alimentos procesados y especialmente productos cárnicos como salchichas, hamburguesas, emulsiones cárnicas y otras, resulta beneficioso desde el punto de vista tecnológico y sensorial, siempre que se incorpore en una concentración adecuada.

ABSTRACT Seaweed is a valuable resource for food development due to its nutritional composition. It is high in protein, vitamins, minerals and dietary fiber, and particularly rich in soluble fiber. Seaweed also contains components beneficial to health such as ω-3 PUFAs, bioactive molecules with antioxidants, and anti-inflammatory, anticancer, and antidiabetic activity. It also has technological properties, so its incorporation in processed foods and especially meat products such as sausages, hamburgers, meat emulsions and others would be beneficial from the technological and sensorial point of view, if it is incorporated in an adequate concentration.
Descritores: Alga Marinha
Ingredientes de Alimentos
Produtos da Carne
Valor Nutritivo
Tipo de Publ: Artigo Clássico
Responsável: CL334.1 - Biblioteca UBO



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