Limpar
3.670 resultados

Acesso aberto

Tipo do recurso

Ano de criação

Produção nacional

Revisado por pares

Áreas

Idioma

Editores

Artigo Revisado por pares

James J. Heckman,

... https://doi.org/10.1177/0081175020973054Andrés Ham, Darío Maldonado, Carlos Santiago Guzmán-Gutiérrez Recent trends in the youth ...

Tópico(s): Economic theories and models

1976 - University of Chicago Press | Journal of Political Economy

Artigo Revisado por pares

Daniel Polani, Mikhail Prokopenko, Larry Yaeger,

... Emergence, Self-organization, Homeostasis, and AutopoiesisNelson Fernández, Carlos Maldonado and Carlos Gershenson1 Jan 2014On the Cross-Disciplinary Nature of ...

Tópico(s): Complex Systems and Decision Making

2013 - World Scientific | Advances in Complex Systems

Artigo Acesso aberto

Andrea Velásquez, Denis Porto Renó, Ana María Beltrán Flandoli, Juan Carlos Maldonado, Carlos Ortiz,

El ecosistema mediático es una metodología de investigación propuesta por Neil Postman y Marshall McLuhan en 1971, con su consolidación a partir de conceptos sólidos presentados en 1979. Sin embargo, presenta conceptos transversales a otros estudios sobre medios, muchos de ellos desarrollados por teóricos que actualizaran, o construyeron conceptos que sostienen una nueva ecología de los medios. El artículo presenta una actualización de estas miradas a partir de una investigación que tiene como metodología ...

Tópico(s): Journalism and Media Studies

2018 - University of La Laguna | Revista Latina de Comunicación Social

Capítulo de livro Acesso aberto

Nelson Fernández, Carlos Eduardo Maldonado, Carlos Gershenson,

In recent decades, the scientific study of complex systems (Bar-Yam 1997; Mitchell 2009) has demanded a paradigm shift in our worldviews (Gershenson et al. 2007; Heylighen et al. 2007). Traditionally, science has been reductionistic. Still, complexity occurs when components are difficult to separate, due to relevant interactions. These interactions are relevant because they generate novel informationwhich determines the future of systems. This fact has several implications (Gershenson 2013).

Tópico(s): Evolutionary Algorithms and Applications

2013 - Springer Nature | Emergence, complexity and computation

Artigo Revisado por pares

Juan Carlos Dibene, Yazmín Maldonado, Carlos Vera, Maurı́cio C. de Oliveira, Leonardo Trujillo, Oliver Schütze,

In this work we report on modeling the demand for Emergency Medical Services (EMS) in Tijuana, Baja California, Mexico, followed by the optimization of the location of the ambulances for the Red Cross of Tijuana (RCT), which is by far the largest provider of EMS services in the region. We used data from more than 10,000 emergency calls surveyed during the year 2013 to model and classify the demand for EMS in different scenarios that provide different perspectives on the demand throughout the city, ...

Tópico(s): Urban and Freight Transport Logistics

2016 - Elsevier BV | Computers in Biology and Medicine

Capítulo de livro Brasil Produção Nacional

Forrest Shull, Jeffrey C. Carver, Guilherme Horta Travassos, José Carlos Maldonado, Reidar Conradi, Victor R. Basili,

... TechniquesForrest Shull, Jeffrey Carver, Guilherme H. Travassos, José Carlos Maldonado, Reidar Conradi, and Victor R. BasiliForrest ShullFraunhofer Center—Maryland, USA, Jeffrey CarverDept. of Computer Science, University of Maryland, College Park, USA, Guilherme H. TravassosCOPPE-Systems Engineering and Computer Science Program, Federal University of Rio de Janeiro, Brazil, José Carlos MaldonadoDept. of Computer Science, University of São Paulo ...

Tópico(s): Model-Driven Software Engineering Techniques

2003 - | Series on software engineering and knowledge engineering

Revisão Brasil Produção Nacional Revisado por pares

Loreto Massardo, María E. Suärez-Almazor, Mario H. Cardiel, Arnulfo Nava, Roger A. Levy, Iêda Maria Magalhães Laurindo, Enrique R. Soriano, Eduardo M. Acevedo‐Vásquez, Alberto Millán, Carlos Pineda, Claudio Galarza-Maldonado, Carlo V. Caballero‐Uribe, Rolando Espinosa-Morales, Bernardo A. Pons‐Estel,

In Brief Objective: A consensus meeting of representatives of 18 Latin-American and Caribbean countries gathered in Reñaca, Chile, for 2 days to identify problems and provide recommendations for the care of patients with rheumatoid arthritis (RA) in Latin America, a region where poverty and other health priorities make the efforts to provide effective and high quality care difficult. This report includes recommendations for health professionals, patients, and health authorities in Latin America, ...

Tópico(s): Chronic Lymphocytic Leukemia Research

2009 - Lippincott Williams & Wilkins | JCR Journal of Clinical Rheumatology

Revisão Acesso aberto Revisado por pares

Carlos César Patiño-Morales, Ricardo Jaime-Cruz, Concepción Sánchez‐Gómez, Juan Carlos Corona, Estefani Yaquelin Hernández‐Cruz, Ivia Kalinova-Jelezova, José Pedraza‐Chaverrí, Perla D. Maldonado, Carlos Alfredo Silva‐Islas, Marcela Salazar–García,

Garlic (Allium sativum) has been used in alternative medicine to treat several diseases, such as cardiovascular and neurodegenerative diseases, cancer, and hepatic diseases. Several publications have highlighted other features of garlic, including its antibacterial, antioxidative, antihypertensive, and antithrombotic properties. The properties of garlic result from the combination of natural compounds that act synergistically and cause different effects. Some garlic-derived compounds have been studied ...

Tópico(s): Research on Leishmaniasis Studies

2021 - Multidisciplinary Digital Publishing Institute | Antioxidants

Carta Acesso aberto Revisado por pares

Antonio Salles-Rojas, Carlos Guzmán-Valderrábano, Wilmer A. Madrid, Amaury González-Molina, Mónica Silva-Cerón, Christian Rodríguez-Hernández, Isabel Salas-Escamilla, Armando Castorena-Maldonado, Carlos Alberto López-García, Luis Torre‐Bouscoulet, Laura Gochicoa‐Rangel,

testing preference where the most frequent reason for preferring home-based testing was "sleeping in one's own bed" (4, 5).We also found that PAP adherence did not differ by PAP initiation strategy, consistent with clinical trial results (6, 7).This is reassuring given concerns that durable medical equipment support for home-based initiation in the real world is lower than what has been provided in clinical trials.However, we did find that adherence was significantly lower among patients who had PAP ...

Tópico(s): Noise Effects and Management

2020 - American Thoracic Society | Annals of the American Thoracic Society

Artigo Revisado por pares

Cristian Vacacela Gómez, Marco Guevara, Talía Tene, Luis Villamagua, Gabriela Tubón-Usca, Frank Maldonado, Carlos Tapia, Antonino Cataldo, Stefano Bellucci, L.S. Caputi,

Graphene is the most attractive 2D nanomaterial with interesting applications from smart coating to high frequency electronics. Its production through liquid exfoliation of graphite in suitable solvents is the most practical approach to prepare graphene dispersions. In recent years, the production of graphene through a short sonication time has attracted huge attention, trying to find a balance between the quality and cost. However, little is known about how the technical parameters (solvent type, ...

Tópico(s): Thermal properties of materials

2021 - Elsevier BV | Applied Surface Science

Artigo Acesso aberto Brasil Produção Nacional Revisado por pares

Camyla Rodrigues Nascimento, Natalie Aparecida Rodrigues Fernandes, Laura Gonzalez-Maldonado, Carlos Rossa,

Understanding macrophage biology can improve comprehension of diverse biological processes and provide insights into novel therapeutic immunomodulatory strategies. Due to limited yield and technical difficulty in isolating primary macrophages, in vitro studies commonly use monocytes as precursor cells. Monocytic cell lines are a virtually unlimited source of macrophage precursors and two of the most frequently used cell lines are THP-1 and U937. Besides a great variability in macrophage differentiation ...

Tópico(s): Immunotherapy and Immune Responses

2022 - Elsevier BV | Biochemistry and Biophysics Reports

Artigo

Lillian Estelle Fisher, James P. Gibbons, Carlos Eduardo Maldonado,

Journal Article Our Catholic Heritage in Texas, 1519–1936. Prepared under the Auspices of the Knights of Columbus of Texas. Edited by James P. Gibbons. Vol. V: The Mission Era: The End of the Spanish Regime, 1780– 1810. By Carlos E. Castañeda Get access Lillian Estelle Fisher Lillian Estelle Fisher Berkeley, California Search for other works by this author on: Oxford Academic Google Scholar Journal of American History, Volume 30, Issue 3, December 1943, Pages 444–445, https://doi.org/10.2307/1896806 ...

Tópico(s): Cuban History and Society

1943 - | The Mississippi Valley Historical Review

Artigo Acesso aberto Revisado por pares

Frederick A. Klipstein, Isabel Beauchamp, José J. Corcino, Milagros Maldonado, Juan T. Tomasini, Norman Maldonado, Carlos Rubio-Terrés, Eric A. Schenk,

Dietary intake, nutritional status, and intestinal structure and function were evaluated in 96 representative adult residents of a rural barrio in Puerto Rico.Deficiencies noted included mild anemia in 4, reduced serum concentrations of iron in 10, folate in 6, vitamin B 1 2 in 1, albumin in 4, carotene in 6, and cholesterol in 7. Thirty-two persons had a single abnormal determination, and 11 had multiple abnormal determinations of intestinal function.These included xylose in 24, folic acid in 1, ...

Tópico(s): Folate and B Vitamins Research

1972 - Elsevier BV | Gastroenterology

Artigo

Ana Lilia Garduño-López, Ricardo Mondragón–Sánchez, Rigoberto Bernal-Maldonado, Carlos A. Hinojosa, Abelardo Meneses-García,

El adenofibroma biliar es un tumor benigno infrecuente formado por estructuras tubulares quísticas complejas revestidas por epitelio de tipo biliar no secretor de mucina con abundante estroma. Describimos en este trabajo un tumor hepático de 6 cm de diámetro descubierto en el lóbulo izquierdo asociado con un aumento de la concentración sérica de CA 19-9. Las características histológicas fueron compatibles con adenofibroma biliar. Nuestros datos apoyan una descripción previa de la lesión para su ...

Tópico(s): Soft tissue tumor case studies

2002 - Springer Science+Business Media | Revista de Oncología

Artigo Revisado por pares

Mercedes Garcı́a Antón, Fátima Franco Múgica, Jesús E. Maldonado, Carlos Morla Juaristi, Helios Sáinz Ollero,

Journal of BiogeographyVolume 24, Issue 6 p. 929-934 New data concerning the evolution of the vegetation in Lillo pinewood (Leon, Spain) M. García Antón, M. García Antón Unidad de Botánica, Dpto Biología, Facultad Ciencias, Universidad Autónoma de Madrid, E-28049 Madrid, Spain,Search for more papers by this authorF. Franco Múgica, F. Franco Múgica Unidad de Botánica, Dpto Biología, Facultad Ciencias, Universidad Autónoma de Madrid, E-28049 Madrid, Spain,Search for more papers by this authorJ. Maldonado, ...

Tópico(s): Lichen and fungal ecology

2003 - Wiley | Journal of Biogeography

Artigo

M. C. Maldonado, Carlos Exequiel Francisco Orosco, M. Lourdes Gonzalez‐Miret, Antonio Roberto Navarro,

Streptomyces strains may control postharvest lemon fruit diseases caused byPenicillium digitatum and Geotrichum candidum. Four Streptomyces strains (RO3, MC3, Alem and CE1) were tested and RO3 was the strain with the highest antagonistic activity. Streptomyces RO3 showed a maximum biomass value (2.15 g/l) after 72 h incubation in yeast extract , malt extract, glucose (YMG) medium; in starch casein medium the highest value was 0.477 g/l at 120 h incubation. The metabolites produced in YMG medium showed ...

Tópico(s): Plant Disease Resistance and Genetics

2010 - Academic Journals | African Journal of Microbiology Research

Artigo Acesso aberto Revisado por pares

Josué Aguila, Gérard Cuzon, Cristina Pascual, Pedro Domíngues, Gabriela Gaxiola, Ariadna Sánchez, Teresita Maldonado, Carlos Rosas,

As has been demonstrated in previous studies, Octopus maya can be fed on artificial diets. In the present study six different diets were assayed. Five diets were designed to test the effect of percentage of inclusion of fish protein concentrate (CPSP: 0, 5, 10, 15, and 20%) and were offered to octopuses as a specifically designed artificial diet. The sixth diet consisted of frozen crab (Callinectes spp) and was used as control diet. Blood metabolites and energy budget of octopuses were evaluated to ...

Tópico(s): Meat and Animal Product Quality

2007 - Elsevier BV | Aquaculture

Artigo Revisado por pares

Mariela Beatriz Maldonado, Carlos A. Zuritz, Mariela Assof,

Abstract Green olives variety Arauco were debittered using lye concentrations of 2.00%, 2.50% and 3.00% of NaOH. Each treatment was then subjected to two rinsing processes with tap water. Next, the olives were cured with brine at 10% sodium chloride concentration. During this curing process, the loss of reducing sugars from, and the diffusion of sodium chloride into the olives was quantified. Effective diffusion coefficients of both solutes in the skin and the flesh were calculated for this period ...

Tópico(s): Botanical Research and Applications

2007 - Elsevier BV | Journal of Food Engineering

Carta Acesso aberto

Salomón Durand Velazco, Víctor Fiestas Solórzano, Moisés Sihuincha Maldonado, Carlos Chávez Lencinas, Vicente Vásquez Vela, Ciro Torrejón Flores, Hugo Rodríguez Ferruchi, César Cabezas,

infecciones por virus dengue (3)(4) .Es necesario realizar otros estudios que permitan evaluar otros aspectos que influyen en la inmunidad de los pacientes con dengue.

Tópico(s): Mosquito-borne diseases and control

2011 - National Institute of Health of Peru | Revista Peruana de Medicina Experimental y Salud Pública

Artigo Revisado por pares

Gerardo Enrique Muñoz-Maldonado, Carlos A. Perez, Eli Esaú Aguiñaga Covarrubias, Sylvia Aide Martínez Cabriales, Laura Alvarado Leyva, José Carlos Jaime‐Pérez, David Gómez Almaguer,

Background aims Lymphedema is a common complication with breast cancer treatment that does not have a definite cure. Our objective was to determine the efficacy of autologous stem cells (ASC) in the treatment of lymphedema secondary to mastectomy and axillary lymphadenectomy in comparison with traditional decongestive treatment with compression sleeves. Methods A prospective study including 20 women with lymphedema secondary to breast cancer surgery with axillary lymphadenectomy was conducted. Women ...

Tópico(s): Breast Implant and Reconstruction

2011 - Elsevier BV | Cytotherapy

Artigo Revisado por pares

Alejandra González‐Duarte, Jesús Higuera‐Calleja, Ferdinand Flores, Luis Dávila-Maldonado, Carlos Cantú‐Brito,

CNS arteritis develops in 30%–70% of TB meningitis cases.1,2 It often affects the basal arteries, resulting in ischemia and infarction of the diencephalon. In addition to anti-TB agents, treatment with steroids is used to modulate the inflammatory response. However, a paradoxical deterioration may follow.3,–,5 The most likely explanation is an enhanced delayed-type hypersensitivity response, leading to activation and accumulation of lymphocytes and macrophages at the site of bacillary deposition, ...

Tópico(s): Sarcoidosis and Beryllium Toxicity Research

2012 - Lippincott Williams & Wilkins | Neurology

Artigo Acesso aberto Revisado por pares

Alejandro F. Maldonado, Carlos A. Giménez, Gustavo A. Aucar,

We present here a systematic study about the influence of the size and type of nuclear charge-distribution models (Gaussian and point-like) on the NMR spectroscopic parameters, the nuclear magnetic shielding σ and the indirect nuclear spin J-coupling. We found that relativistic effects largely enhance the nuclear charge-distribution effects (NChDE) on those parameters being them quite sensitive to the nuclear model adopted for calculations. Results for two rare gas atoms (Kr, Rn) and few molecular ...

Tópico(s): Solid-state spectroscopy and crystallography

2012 - American Institute of Physics | The Journal of Chemical Physics

Artigo Acesso aberto Revisado por pares

Robyn M. Emanuel, Amylou C. Dueck, Holly L. Geyer, Jean‐Jacques Kiladjian, Stefanie Slot, Sonja Zweegman, Peter te Boekhorst, Suzan Commandeur, Harry C. Schouten, Federico Sackmann, Ana Kerguelen Fuentes, Dolores Hernández‐Maraver, Heike L. Pahl, Martin Grießhammer, Frank Stegelmann, Konstanze Doehner, Thomas Lehmann, Karin Bonatz, Andreas Reiter, Françoise Boyer, Gabriel Étienne, Jean‐Christophe Ianotto, Dana Ranta, Lydia Roy, Jean‐Yves Cahn, Claire Harrison, Deepti Radia, Pablo Muxí, Norman Maldonado, Carlos Besses, Francisco Cervantes, Peter Johansson, Tiziano Barbui, Giovanni Barosi, Alessandro M. Vannucchi, Francesco Passamonti, Björn Andréasson, Maria L Ferarri, Alessandro Rambaldi, Jan Samuelsson, Gunnar Birgegård, Ayalew Tefferi, Ruben A. Mesa,

Myeloproliferative neoplasm (MPN) symptoms are troublesome to patients, and alleviation of this burden represents a paramount treatment objective in the development of MPN-directed therapies. We aimed to assess the utility of an abbreviated symptom score for the most pertinent and representative MPN symptoms for subsequent serial use in assessing response to therapy.The Myeloproliferative Neoplasm Symptom Assessment Form total symptom score (MPN-SAF TSS) was calculated as the mean score for 10 items ...

Tópico(s): Eosinophilic Disorders and Syndromes

2012 - Lippincott Williams & Wilkins | Journal of Clinical Oncology

Artigo Acesso aberto

Irán Alía-Tejacal, Yanik I. Astudillo-Maldonado, Carlos Alberto Núñez-Colín, Luis Alonso Valdez‐Aguilar, Silvia Bautista‐Baños, Enrique García-Vázquez, Rafael Ariza-Flores, Fernando Rivera‐Cabrera,

Sesenta y siete colectas de ciruela mexicana (Spondias purpurea L.) de los Estados de Guerrero, Morelos y Chiapas fueron evaluadas en sus características de fruto en masa, dimensiones, componentes del color (L*, C* y H*), sólidos solubles totales (SST), acidez titulable (AT) y la proporción SST/AT. La masa del fruto, el ángulo matiz (H*) y la proporción SST/AT tuvieron los mayores coeficiente de variación (CV: 50-60 %) y contribuyeron a la formación de siete grupos. La masa de los frutos varió de 4.0 a 43. ...

Tópico(s): Psidium guajava Extracts and Applications

2012 - Mexican Society of Phytogenetics | Revista Fitotecnia Mexicana

Artigo Revisado por pares

Cristina Pascual, Edgar Zenteno, Gérard Cuzon, Ariadna Sánchez, Gabriela Gaxiola, Gabriel Taboada, Jaime Suárez, Teresita Maldonado, Carlos Rosas,

The present study was designed to evaluate the effect of dietary protein level on survival, assimilation efficiency and immunological condition of Litopenaeus vannamei juveniles using two protein levels in a range of optimal reported levels of 15% and 40% (equivalent to 15 and 40 g DP/kg body weight/day [g DP/kg BWd]) and one extremely low (5% equivalent to 5 g DP/kg BWd). In order to reach this goal, effects of dietary protein level on energetic balance were recorded by ingestion rate (I), respiratory ...

Tópico(s): Invertebrate Immune Response Mechanisms

2004 - Elsevier BV | Aquaculture

Artigo Revisado por pares

Sergio Gutiérrez‐Castellanos, Miguel Cruz, Laura Rabelo, Rocío Jiménez Godínez, Elba Reyes‐Maldonado, Carlos Riebeling‐Navarro,

Abstract: Chronic myelogenous leukaemia (CML) cells show expression of BCL‐X L , an anti‐apoptotic oncogene. This expression is induced by BCR‐ABL protein kinase through activation of the signal transducer and activator of transcription‐5 protein (STAT5). To date, however, the contribution of BCL‐X L and STAT5 to the transforming phenotype in CML is still unclear. This study was aimed at defining the status of activated STAT5 and BCL‐X L expression and their relation to BCR‐ABL rearrangement in CML ...

Tópico(s): Quinazolinone synthesis and applications

2004 - Wiley | European Journal Of Haematology

Artigo Acesso aberto Revisado por pares

Johanna M. Vanegas, Astrid V. Cienfuegos-Gallet, Ana M. Ocampo, Lucelly López, Helena del Corral, Gustavo Roncancio, Patricia Sierra, Lina Echeverri-Toro, Sigifredo Ospina, Natália Maldonado, Carlos Robledo, Andrea Restrepo, J. Natalia Jiménez,

Carbapenem-resistant Pseudomonas aeruginosa has become a serious health threat worldwide due to the limited options available for its treatment. Understanding its epidemiology contributes to the control of antibiotic resistance. The aim of this study was to describe the clinical and molecular characteristics of infections caused by carbapenem-resistant P. aeruginosa isolates in five tertiary-care hospitals in Medellín, Colombia. A cross-sectional study was conducted in five tertiary-care hospitals ...

Tópico(s): Antibiotic Use and Resistance

2014 - American Society for Microbiology | Journal of Clinical Microbiology

Artigo Revisado por pares

Carola Muñoz-Montesino, Francisco J. Roa, Eduardo Peña, Maurício González, Kirsty Sotomayor, Eveling Inostroza, Carolina Muñoz-Flores, Iván González‐Chavarría, Mafalda Maldonado, Carlos Solíz, Alejandro Reyes, Juan Carlos Vera, Coralia I. Rivas,

Despite the fundamental importance of the redox metabolism of mitochondria under normal and pathological conditions, our knowledge regarding the transport of vitamin C across mitochondrial membranes remains far from complete. We report here that human HEK-293 cells express a mitochondrial low-affinity ascorbic acid transporter that molecularly corresponds to SVCT2, a member of the sodium-coupled ascorbic acid transporter family 2. The transporter SVCT1 is absent from HEK-293 cells. Confocal colocalization ...

Tópico(s): Vitamin D Research Studies

2014 - Elsevier BV | Free Radical Biology and Medicine

Artigo Acesso aberto Revisado por pares

Christian Castillo, Galia Ramírez‐Toloza, Carolina Valck, Lorena Aguilar, Ismael Maldonado, Carlos Rosas, Norbel Galanti, Ulrike Kemmerling, Arturo Ferreira,

Background 9 million people are infected with Trypanosoma cruzi in Latin America, plus more than 300,000 in the United States, Canada, Europe, Australia, and Japan. Approximately 30% of infected individuals develop circulatory or digestive pathology. While in underdeveloped countries transmission is mainly through hematophagous arthropods, transplacental infection prevails in developed ones. Methodology/Principal Findings During infection, T. cruzi calreticulin (TcCRT) translocates from the endoplasmic ...

Tópico(s): Complement system in diseases

2013 - Public Library of Science | PLoS neglected tropical diseases