Produção Nacional
Revisado por pares
E.M. Ruiz-Navas, César Edil da Costa, F. Velasco, J. M. Torralba,
ResumenEste trabajo está dedicado al proceso de aleación mecánica como método de obtención de polvos.En él se repasan los aspectos más importantes implicados en el proceso, los fundamentos, así como su aplicación particular a la obtención de polvos metálicos. Palabras claveAleación mecánica
Tópico(s): BIM and Construction Integration
2000 - Spanish National Research Council | Revista de Metalurgia
Fernanda Navas-Camargo, César Augusto Castillo Dussán, Jaime Cubides Cárdenas,
Las lecturas que pueden hacerse sobre los derechos humanos llevan a que puedan ser entendidos como facultades y reconocimientos que otorga la ley al ser humano para compartir, valorar, debatir e intervenir en las realidades sociales. Observar, describir, analizar o participar en una determinada situación de la cotidianidad aparece como una poderosa herramienta de la persona o del grupo social para comprender la complejidad de las relaciones, las cuales deberían ser reguladas por el derecho con eficacia ...
Tópico(s): Criminal Justice and Penology
2022 - | Novum Jus
V DELAPUENTEREDONDO, Jesús Navas, N GARCIADELBLANCO, N LADRONBORONAT, César B. Gutiérrez-Martı́n, Elías Fernando Rodríguez Ferri,
On the basis of a species-specific PCR assay, a RFLP analysis for typing of Haemophilus parasuis strains was developed and evaluated. Amplification was based on the gene tbpA, encoding a transferrin-binding protein. RFLP analysis of the 1.9-kb tbpA-amplicon using TaqI, AvaI and RsaI endonucleases produced 12 different patterns for the reference strains of the 15 known H. parasuis serovars, and showed a high heterogeneity (33 RFLP groups) for 101 H. parasuis clinical isolates tested. The sensitivity, ...
Tópico(s): Animal Virus Infections Studies
2003 - Elsevier BV | Veterinary Microbiology
A.J. Martín de la Fuente, Alexander W. Tucker, Jesús Navas, Mónica Blanco, S.J. Morris, César B. Gutiérrez-Martı́n,
A total of 30 British and 30 Spanish Haemophilus parasuis isolates were tested for their susceptibility to 19 of the antimicrobials currently used in swine practice with a broth microdilution method in order to know the emergence of resistance against these compounds in this porcine pathogen. All the British isolates were susceptible to penicillin, ceftiofur, erythromycin, tilmicosin, enrofloxacin, and florfenicol, and most of them were susceptible to the remaining antimicrobials (the highest resistance ...
Tópico(s): Animal Virus Infections Studies
2006 - Elsevier BV | Veterinary Microbiology
María‐Luisa del Rio, Jesús Navas, César B. Gutiérrez-Martı́n, José-Ignacio Rodríguez-Barbosa, Elías Fernando Rodríguez Ferri,
Identification of genes differentially present in Haemophilus parasuis serovar 2 by representational difference analysis (RDA).Bacterial genomic DNA was extracted, cleaved with Sau3AI and ligated to oligonucleotide adapter pair. The optimal tester (H. parasuis serovar 2)/driver ratio (H. parasuis serovars 1, 3 and 5) for the hybridization was established and the mixture was hybridized, and amplified by PCR. The products were cloned and transformed into Escherichia coli TOP10 cells and checked for specificity ...
Tópico(s): Respiratory viral infections research
2005 - Oxford University Press | Letters in Applied Microbiology
Produção Nacional
Revisado por pares
Patricia Córdoba Cubillo, César Alberto Navas Brenes,
Este artículo tiene como propósito presentar las ventajas de usar la metodología basada en tareas (Task -based Learning) para ayudar a un grupo de estudiantes del Centro de Informática de la Universidad de Costa Rica a inferir la regla y uso de la forma superlativa de los adjetivos en inglés Estos estudiantes recibían un curso de inglés con propósitos específicos impartido por dos docentes de inglés. El curso tuvo una duración aproximada de cuatro meses y se cubrieron cuatro unidades. Es necesario ...
Tópico(s): Second Language Acquisition and Learning
2011 - University of Costa Rica | Actualidades Investigativas en Educación
Alejandro Navas, Fátima Sofía Magaña‐Guerrero, Alfredo Domínguez-López, César Chávez-García, Graciela Partido, Enrique O Graue-Hernández, Francisco Javier Sánchez García, Yonathan Garfias,
Acute ocular chemical burns are ophthalmic emergencies requiring immediate diagnosis and treatment as they may lead to permanent impairment of vision. The clinical manifestations of such burns are produced by exacerbated innate immune response via the infiltration of inflammatory cells and activation of stromal fibroblasts. New therapies are emerging that are dedicated to repair mechanisms that improve the ocular surface after damage; for example, transplantation of stem cells (SC) has been successfully ...
Tópico(s): Wound Healing and Treatments
2018 - Wiley | Stem Cells Translational Medicine
César Magro‐Checa, Antonio Navas-Parejo Casado, Elena Borrego-García, Enriqué Raya-Álvarez, José Luis Rosales-Alexander, Juan Salvatierra, Trinidad Caballero-Morales, Mercedes Gómez‐Morales,
AA (secondary) amyloidosis is one of the most severe and uncommon complications of several rheumatic disorders and chronic infections such as tuberculosis (TB). Successful treatment depends on the control of the underlying inflammatory process, what can lead to an improvement or a regression in organ dysfunction. If the disorder persists, it has been reported in some cases of AA amyloidosis secondary to rheumatic diseases, that the use of biologic therapy is so far the only opportunity to reduce the ...
Tópico(s): Pancreatitis Pathology and Treatment
2011 - Taylor & Francis | Amyloid
Produção Nacional
Revisado por pares
Clarice Gorenstein, Joel Rennó, A. H. G. Vieira Filho, Arlete Gianfaldoni, Marcelo Alfonso Gonçalves, Hans Wolfgang Halbe, César Eduardo Fernandes, Frederico Navas Demétrio,
Tópico(s): Cancer-related cognitive impairment studies
2011 - Springer Science+Business Media | Archives of Women s Mental Health
This article examines the role of the audio-language laboratory in language teaching. The writer explains that the language laboratory is still a very helpful tool because learners can reinforce certain areas in which they are experiencing some difficulty such as the internalization of correct grammatical structures, pronunciation, and listening comprehension. This article contains a brief analysis of the results of a survey questionnaire that was given to students of the Conversational English ...
Tópico(s): Second Language Acquisition and Learning
2011 - University of Costa Rica | Actualidades Investigativas en Educación
This article presents some tools of discourse analysis that are useful in analyzing and understanding different segments of an oral narrative. The main objective of this article is to explain and exemplify different concepts regarding the field of discourse analysis in order to study an oral anecdote in regard to danger of death recorded from a native speaker of English. It emphasizes the use of spoken texts (either scripts or recorded narrations) as primary sources of authentic features of the spoken ...
Tópico(s): Language, Metaphor, and Cognition
2011 - University of Costa Rica | Actualidades Investigativas en Educación
Raquel Rollín, Roberto Álvarez‐Lafuente, Francesc Marco, Juan Ángel Jover, César Hernández‐García, Carmen Rodríguez‐Navas, L. López-Durán, Benjamín Fernández‐Gutiérrez,
ObjectiveTo investigate whether there is a possible viral transmission using mesenchymal stem cells (MSCs) in autologous or allogeneic transplantation in the context of osteoarthritis (OA) patients. The presence of parvovirus B19 (B19), varicella zoster virus (VZV), and human herpesvirus-6 (HHV-6) was studied in MSCs from bone marrow of patients with OA and healthy controls.MethodsMSCs were prepared from bone marrow aspirates obtained from 18 patients undergoing joint replacement as a result of OA and ...
Tópico(s): Bone and Joint Diseases
2007 - Elsevier BV | Osteoarthritis and Cartilage
María‐Luisa del Rio, César B. Gutiérrez-Martı́n, Jesús Navas, B. Gutiérrez-Muñiz, José-Ignacio Rodríguez-Barbosa, Elías Fernando Rodríguez Ferri,
The Haemophilus parasuis aroA gene encodes 5-enolpyruvylshikimate-3-phosphate synthase and participates in the aromatic amino acids and the folic acid universal metabolic pathway of bacteria. The application of aroA-based PCR-RFLP methodology yields a significant degree of diversity in H. parasuis and Actinobacillus species. PCR amplification of the aroA gene rendered a 1,067-bp fragment in all 15 H. parasuis serovars, and also in Actinobacillus pleuropneumoniae serotypes 1–12, Actinobacillus lignieresii, ...
Tópico(s): Bacterial Identification and Susceptibility Testing
2005 - Elsevier BV | Research in Veterinary Science
Óscar Serrano, Diana Isabel Gómez-López, Laura Sánchez-Valencia, Andrés Acosta Chaparro, Raúl Navas-Camacho, Juan David Gónzalez-Corredor, Cristian Salinas, Pere Masqué, César A. Bernal, Nùria Marbá,
Abstract Seagrass ecosystems rank amongst the most efficient natural carbon sinks on earth, sequestering CO 2 through photosynthesis and storing organic carbon (C org ) underneath their soils for millennia and thereby, mitigating climate change. However, estimates of C org stocks and accumulation rates in seagrass meadows (blue carbon) are restricted to few regions, and further information on spatial variability is required to derive robust global estimates. Here we studied soil C org stocks and accumulation ...
Tópico(s): Marine Biology and Ecology Research
2021 - Nature Portfolio | Scientific Reports
Embriette R. Hyde, José A. Navas-Molina, Se Jin Song, Jordan G. Kueneman, Gail Ackermann, César Cardona, Gregory Humphrey, Don R. Boyer, Tom Weaver, Joseph R. Mendelson, Valerie J. McKenzie, Jack A. Gilbert, Rob Knight,
Examining the way in which animals, including those in captivity, interact with their environment is extremely important for studying ecological processes and developing sophisticated animal husbandry. Here we use the Komodo dragon (Varanus komodoensis) to quantify the degree of sharing of salivary, skin, and fecal microbiota with their environment in captivity. Both species richness and microbial community composition of most surfaces in the Komodo dragon's environment are similar to the Komodo ...
Tópico(s): Human-Animal Interaction Studies
2016 - American Society for Microbiology | mSystems
José G. Prato, Fernando Millán, L. González, Anita Cecilia Ríos, Esteban Pérez López, Iván Ríos, Siboney Navas, Andrés Márquez, Julio César Carrero, Juan Isidro Díaz-García,
This work evaluates phosphate and nitrate ion adsorption from aqueous solutions on calcined adsorbent substrates of variable charge, prepared from three granulometric fractions of an oxidic lithological material. The adsorbent material was chemically characterized, and N2 gas adsorption (BET), X-ray diffraction, and DTA techniques were applied. The experimental conditions included the protonation of the beds with HCl and H2SO4 and the study of adsorption isotherms and kinetics. The lithological material ...
Tópico(s): Layered Double Hydroxides Synthesis and Applications
2022 - Multidisciplinary Digital Publishing Institute | Water
Sara Salvador‐Martín, B. Kaczmarczyk, Rebeca Álvarez, Víctor Manuel Navas‐López, Carmen Gallego‐Fernández, Ana Moreno‐Álvarez, Alfonso Solar‐Boga, César Sánchez, María del Mar Tolín Hernani, Marta Velasco Rodríguez‐Belvís, Rosana Muñoz‐Codoceo, Alejandro Rodríguez Martínez, Concepción Álvarez del Vayo Benito, Ferrán Bossacoma, Gemma Pujol‐Muncunill, María J. Fobelo, Antonio Millán‐Jiménez, Lorena Magallares, Eva Martínez‐Ojinaga, Inés Loverdos, Francisco Javier Eizaguirre, José A. Blanca‐García, Susana Clemente, Ruth García‐Romero, Vicente Merino‐Bohórquez, Rafael González de Caldas, Enrique Vázquez, Ana Dopazo, María Sanjurjo‐Sáez, Luis A. López‐Fernández,
Background: Up to 30% of patients with pediatric inflammatory bowel disease (IBD) do not respond to anti-Tumor Necrosis Factor (anti-TNF) therapy. The aim of this study was to identify pharmacogenomic markers that predict early response to anti-TNF drugs in pediatric patients with IBD. Methods: An observational, longitudinal, prospective cohort study was conducted. The study population comprised 38 patients with IBD aged < 18 years who started treatment with infliximab or adalimumab (29 responders and ...
Tópico(s): Viral gastroenteritis research and epidemiology
2021 - Multidisciplinary Digital Publishing Institute | Pharmaceutics
Laura Diezma‐Navas, Ana Pérez‐González, Haydeé Artaza, Lola Alonso, Elena Caro, César Llave, Virginia Ruíz‐Ferrer,
Summary DNA methylation is an important epigenetic mechanism for controlling innate immunity against microbial pathogens in plants. Little is known, however, about the manner in which viral infections interact with DNA methylation pathways. Here we investigate the crosstalk between epigenetic silencing and viral infections in Arabidopsis inflorescences. We found that tobacco rattle virus (TRV) causes changes in the expression of key transcriptional gene silencing factors with RNA‐directed DNA methylation ...
Tópico(s): Legume Nitrogen Fixing Symbiosis
2019 - Wiley | Molecular Plant Pathology
César Prieto de Frías, Miguel Muñoz‐Navas, María Teresa Betés, Ramón Angós, S. Riva, Cristina Carretero, Maite Herráiz, Alejandra P. Alzina, L.F Llopis López,
Background and Aims It is known that sodium picosulfate–magnesium citrate (SPMC) bowel preparations are effective, well tolerated and safe, and that split-dosing is more effective for colon cleansing than previous-day regimens. Anesthetic guidelines consider that residual gastric fluid is independent of clear liquid fasting times. However, reluctance to use split-dosing persists. This may be due to limited data on residual gastric fluid volumes (RGFVs) and split-dosing bowel preparations, and that ...
Tópico(s): Gallbladder and Bile Duct Disorders
2015 - Elsevier BV | Gastrointestinal Endoscopy
Paulina Schuller, D. E. Walling, Andrés Iroumé, César Quilodrán, Alejandra Castillo, Ana Navas,
A study of the impact of forest harvesting operations on sediment mobilization from forested catchments has been undertaken in south-central Chile. The study focused on two sets of small paired catchments (treatment and control), with similar soil type, but contrasting mean annual rainfall, located about 400 km apart at Nacimiento (1200 mm yr−1) and Los Ulmos (2500 mm yr−1). The objective was to study the changes in the relative contribution of the primary sources of fine sediment caused by forestry ...
Tópico(s): Hydrology and Watershed Management Studies
2013 - Elsevier BV | Journal of Environmental Radioactivity
María Fernández‐Calderón, Miguel Muñoz‐Navas, Juan Carrascosa-Gil, María Teresa Betés-Ibañez, S. Riva, César Prieto de Frías, María Teresa Herráiz-Bayod, Cristina Carretero-Ribón,
Introduction: insufflation with carbon dioxide (CO 2 ) during endoscopies compared to air is associated with a decrease in abdominal discomfort after the examination, because CO 2 is readily absorbed through the small intestine and eliminated by the lungs.Aim: the objective of this randomized clinical trial was to assess the effect of CO 2 insufflation on pain and abdominal distension after an ileo-colonoscopy (I) and after an ileo-colonoscopy plus gastroscopy (I+G).Material and methods: we included ...
Tópico(s): Colorectal Cancer Screening and Detection
2012 - Arán Ediciones | Revista Española de Enfermedades Digestivas
Julio César González, Christian Acevedo Navas,
Este artículo identifica los principales riesgos que podrían generar crisis en la industria turística latinoamericana para el trienio 2020-2022, a partir de una revisión de literatura y un tanque de pensamiento con 38 expertos en seguridad, en el marco del Congreso de la Asociación Latinoamericana de Seguridad (ALAS) en Punta Cana (2020). Se establece un listado de 20 principales riesgos, sobre el cual se interrogó al grupo de expertos y se aplicó una escala de Likert para definir su importancia en ...
Tópico(s): Business, Innovation, and Economy
2021 - | Revista Científica General José María Córdova
Produção Nacional
Revisado por pares
Elizabeth Navas Sanches, Elisete Navas Sanches Próspero, Henri Stuker, Moacir César de Borba Júnior,
Compreender os vínculos com o trabalho e a organização empregadora, além de apontar as implicações para a estruturação do indivíduo, seu desenvolvimento e seu comportamento, estão entre os desafios nesta área do conhecimento. Este estudo investigou o comprometimento com a organização e o trabalho dos profissionais da Estratégia de Saúde da Família em uma Gerência Regional de Saúde em Santa Catarina entre 2005 e 2007. Objetivou identificar os padrões de comprometimento com a organização e o trabalho ...
Tópico(s): Business and Management Studies
2010 - UNIVERSIDADE FEDERAL DE GOIÁS | Revista Eletrônica de Enfermagem
Produção Nacional
Revisado por pares
Luciana Lopes Silva Costa, Ana Luiza Navas, Christian César Cândido de Oliveira, Lílian Ribeiro Caldas Ratto, Kamila Helena Prior de Carvalho, Helio Rodrigues da Silva, Cristiane Lopes, Carla Andréa Tieppo,
OBJETIVO: avaliar a memória operacional fonológica e relacionar com a impulsividade de pacientes em tratamento no Centro de Atenção Integrada à Saúde Mental. MÉTODO: 29 usuários: 21 do gênero masculino e 8 do feminino, usuários de substâncias psicoativas, com 37,9±10,5 anos de idade e 10,59±3,53 anos de escolaridade; e 30 voluntários: 19 do gênero masculino e 11 do feminino, com 32,4±11,9 anos de idade e 11,07±3,29 anos de escolaridade, sem histórico psiquiátrico ou de dependência química foram ...
Tópico(s): Attention Deficit Hyperactivity Disorder
2011 - CEFAC Saúde e Educação | Revista CEFAC
Ludmila La Manna, Leticia Gaspar, César Mario Rostagno, Laura Quijano, Ana Navas,
This paper aimed to identify indicators of soil degradation in volcanic soils developed in the ecotone between the Andean Forests and the Patagonian steppe. The study area is located in the Percy River Basin, Argentine, on alluvial fans with volcanic soils. Sampling was conducted in two adjacent hillslopes where native forest was replaced by a rangeland with grass-shrub vegetation and a 32-years old Pinus radiata plantation. Sectioned and bulk soil samples were collected along three transects in ...
Tópico(s): Silicon Effects in Agriculture
2018 - Elsevier BV | CATENA
Produção Nacional
Revisado por pares
Rafael Reis de Rezende, Talita Bernardon Mar, Lina Marcela Cortés Páez, André da Silva Xavier, César Augusto Diniz Xavier, Jesús Navas‐Castillo, F. Murilo Zerbini, Poliane Alfenas‐Zerbini,
Gemycircularviruses (genus Gemycircularvirus, family Genomoviridae) are single-stranded DNA viruses that are spread around the world in association with several organisms and environments. In this work, we identified two gemycircularviruses associated with two non-cultivated plants in Brazil, Momordica charantia and Euphorbia heterophylla. Both viruses display the general genome structure of gemycircularviruses. The virus isolated from M. charantia showed the highest nucleotide sequence identity ...
Tópico(s): Animal Virus Infections Studies
2018 - Springer Science+Business Media | Archives of Virology
This paper analyzes a problem-solution pattern shown in the transcription of a conversation. This analysis is based on a conversation that has been elicited from three native speakers of English. These speakers were given a topic that dealt with the problem of children being constantly exposed to violent video games. As a result, the writer recorded an oral text that contains several elements related to a problem-solution pattern such as the main issue, opinions, personal examples, possible solutions, ...
Tópico(s): Literacy and Educational Practices
2011 - University of Costa Rica | Actualidades Investigativas en Educación
El principal objetivo de este artículo es presentar una lección, la cual incorpora materiales auténticos, para el curso de inglés LM-1230 Comunicación Oral I con base en los principios pedagógicos de la metodología de aprendizaje basada en contenidos (Content-Based Instruction). Esta lección ayudará a docentes principiantes quienes eventualmente impartirán cursos originados de la metodología de aprendizaje basada en contenidos a un nivel intermedio de inglés. La población meta de esta lección consiste ...
Tópico(s): Subtitles and Audiovisual Media
2011 - University of Costa Rica | Actualidades Investigativas en Educación
... 1016/j.jtherbio.2015.11.001Eduardo A. Sanabria, César Y. Rodríguez, Cristina Vergara, Emanuel Ontivero, Mariana Banchig, Ana L. Navas, Mario A. Herrera-Morata, Lorena B. Quiroga Thermal ...
Tópico(s): Sports Performance and Training
1961 - University of Chicago Press | Physiological Zoology
El presente artículo tiene como propósito presentar los resultados de la gestión de un entorno virtual de aprendizaje (EVA) en dos grupos del curso Composición Inglesa II de la Universidad de Costa Rica a lo largo de un año. Se trata del segundo curso de expresión escrita de la carrera de Bachillerato en Inglés, el cual tiene un alto nivel de dificultad debido a la transición entre el desarrollo del párrafo académico a ensayos con tres principales patrones retóricos. Se gestionó un EVA con interacción ...
Tópico(s): Educational Technology in Learning
2021 - | InterSedes