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Search Results: 1 - 10 of 5346 matches for " Figueroa-Lara "
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Factores asociados con la búsqueda del servicio de interrupción legal del embarazo en la Ciudad de México, 2010
Figueroa-Lara,Alejandro; Aracena-Genao,Belkis; Reyes-Morales,Hortensia; Lamadrid-Figueroa,Héctor;
Salud Pública de México , 2012, DOI: 10.1590/S0036-36342012000400010
Abstract: objective: to identify factors associated with the seeking of the legal-interruption-pregnancy (lip) services in mexico city. materials and methods: we used a case-control design. users who utilized the lip were defined as cases, while users of the antenatal care service with gestational age 13 or more weeks and who reported having an unwanted pregnancy were defined as controls. logistic regressions were fitted to estimate odds ratios. results: higher level of education (or=1.47, 95% ci:1.04-2.07), women's occupation (being student or=7.31, 95% ci:1.58-33.95; worker or=13.43, 95% ci:2.04-88.54), and number of previous abortions (or=11.41, 95% ci:1.65-79.07) were identified as factors associated with the lookup of lip. conclusions: in mexico city context, empowered women with a higher level of education, or having a work activity are the users of lip services. strategies for improving access of women with low empowerment conditions are needed.
Opportunity Cost for Early Treatment of Chagas Disease in Mexico
Janine M. Ramsey,Miguel Elizondo-Cano,Gilberto Sanchez-González,Adriana Pe?a-Nieves,Alejandro Figueroa-Lara
PLOS Neglected Tropical Diseases , 2014, DOI: 10.1371/journal.pntd.0002776
Abstract: Background Given current neglect for Chagas disease in public health programs in Mexico, future healthcare and economic development policies will need a more robust model to analyze costs and impacts of timely clinical attention of infected populations. Methodology/Principal Findings A Markov decision model was constructed to simulate the natural history of a Chagas disease cohort in Mexico and to project the associated short and long-term clinical outcomes and corresponding costs. The lifetime cost for a timely diagnosed and treated Chagas disease patient is US$ 10,160, while the cost for an undiagnosed individual is US$ 11,877. The cost of a diagnosed and treated case increases 24-fold from early acute to indeterminate stage. The major cost component for lifetime cost was working days lost, between 44% and 75%, depending on the program scenario for timely diagnosis and treatment. Conclusions/Significance In the long term, it is cheaper to diagnose and treat chagasic patients early, instead of doing nothing. This finding by itself argues for the need to shift current policy, in order to prioritize and attend this neglected disease for the benefit of social and economic development, which implies including treatment drugs in the national formularies. Present results are even more relevant, if one considers that timely diagnosis and treatment can arrest clinical progression and enhance a chronic patient's quality of life.
Interacción del componente pertussis de células completas con los antígenos tetánico, Haemophilus influenzae tipo B y hepatitis B en ensayos de potencia para vacunas combinadas
Landys,Mario; Figueroa,Juan Miguel; Lara,Ana; Perdomo,Vicente;
Vaccimonitor , 2008,
Abstract: combined vaccines have a higher level of acceptance in the population because fewer immunisations are required for protection against infectious diseases. nevertheless, new challenges have appeared due to the report of some interference among the antigens included in such vaccines. the aim of this paper was to evaluate whole-cell pertussis (wp) interference in potency tests with other antigens like tetanus, haemophilus influenzae type b (hib) and hepatitis b. for that purpose, we evaluated combined vaccines and compared them with the respective monovalent vaccines. likewise, we prepared experimental formulations with different antigen combinations to evaluate the extent and nature of the interference caused by wp. we obtained a significant increase of the tetanus and hib biological activities when both antigens are combined with wp, although it depended on the animal model and the experimental design used. on the other hand, wp decreased both the in vivo and in vitro potency of hb in a non-significant way.
Aspectos de la biología reproductiva de una población de Puya trianae Baker, en la reserva municipal de Cogua (Cundinamarca, Colombia)
Lara Figueroa Katherine,Bonilla Gómez María Argenis
Acta Biológica Colombiana , 2006,
Abstract: En este estudio se trataron algunos aspectos sobre la biología reproductiva de una población de Puya trianae, una bromelia terrestre de los páramos colombianos. Se observó una separación espacio-temporal de los órganos reproductivos que determina la condición de protoginia en las flores a partir del inicio de la antesis, fase de la flor cuyo estigma se torna receptivo y la producción de néctar es significativa. Se encontró en P. trianae un sistema reproductivo auto compatible, lo que permitió a las inflorescencias auto polinizarse y ser fecundadas con polen foráneo; la fructificación de la población bajo condiciones naturales (éxito reproductivo) estuvo limitada por la predación y los polinizadores. Las rosetas solo asignaron el 13% de su biomasa en su esfuerzo reproductivo, el porcentaje restante fue invertido en su crecimiento vegetativo. Se registró la floración de la población hacia la época húmeda (junio-agosto de 2003), el clima fue poco favorable para los polinizadores, pero adecuado para evitar la deshidratación de las flores y la evaporación del néctar. La fructificación ocurrió en la época seca (diciembre-febrero de 2004), tiempo propicio para la dehiscencia de los frutos y la dispersión eólica de las semillas. Se observaron y determinaron los colibríes Aglaeactis cupripennis y Pterophanes cyanopterus como polinizadores eficientes, además de los insectos residentes de las familias Nitidulidae (Coleoptera) y Phoridae (Diptera), cuyas larvas fueron predadores importantes de la inflorescencia.
Interacción del componente pertussis de células completas con los antígenos tetánico, Haemophilus influenzae tipo B y hepatitis B en ensayos de potencia para vacunas combinadas
Mario Landys,Juan Miguel Figueroa,Ana Lara,Vicente Perdomo
Vaccimonitor , 2008,
Abstract: Las vacunas combinadas permiten un grado de aceptación mayor entre la población, dado que se requiere de menos inmunizaciones para proteger contra las enfermedades infecciosas. Sin embargo, esto ha generado nuevos retos, ya que se han reportado numerosas interacciones entre los diferentes antígenos que conforman estas vacunas. El propósito del presente trabajo fue evaluar la interferencia potencial del componente pertussis de células completas sobre los ensayos para determinar la actividad biológica deotros antígenos como toxoide tetánico, Haemophilus influenzae tipo b (Hib) y hepatitis B. Para ello se estudiaron mediante ensayosde potencia vacunas combinadas que contenían estos antígenos y se compararon con vacunas monovalentes. A su vez se prepararonadyuvaciones experimentales cuya composición permitió estimar adecuadamente la extensión y naturaleza de la interacción entrecomponentes. Se obtuvo que el componente pertussis incrementó significativamente la actividad biológica de Hib y tétanos, aunqueesto puede depender mucho del modelo animal y el dise o experimental utilizado. En cuanto al antígeno de hepatitis B se demostróque pertussis inhibía la potencia de este antígeno, tanto in vitro como in vivo, aunque por mecanismos diferentes y de forma nosignificativa.
Desarrollo de habilidades básicas en lenguaje y matemáticas en egresados de pedagogía. Un estudio comparativo
Tito Larrondo,Marcela Lara,Claudio Figueroa,María J. Rojas
Calidad en la Educación , 2007,
Abstract: El presente artículo resume los principales hallazgos de un estudio cuyo principal objetivo era determinar el nivel de desarrollo alcanzado por los egresados de pedagogía en Lenguaje y Matemáticas, los factores que lo explicarían y su vinculación con las acciones remediales implementadas por las instituciones formadoras.Los resultados indican que la variación entre ingreso y egreso es baja, aunque se aprecian avances en el comportamiento de Lenguaje y algunas dimensiones que componen las habilidades básicas. Se detecta una baja vinculación de estos resultados con las acciones remediales identificadas, tanto en las instituciones como en las personas.
Disparidades económicas sobre unidades territoriales menores: análisis de convergencia
Luis César Herrero Prieto,Víctor Fernando Figueroa Arcila,José ángel Sanz Lara
Investigaciones Regionales , 2010,
Abstract: El objetivo fundamental de este trabajo es analizar la aplicabilidad de los modelos de convergencia económica en unidades territoriales menores y sobre la base de la estimación de indicadores sintéticos de desarrollo. Para tal efecto, se postula la aplicación de modelos de regresión espacial a partir de un índice compuesto de desarrollo con desagregación municipal y construido mediante técnicas de análisis multivariante. La aplicación de esta metodología se realiza sobre una región prototipo, el sistema municipal de la Comunidad Autónoma de Castilla y León durante el periodo 1981-2001, con el fin de mostrar también la evolución de las disparidades territoriales en este ámbito.
Synthesis by Microwaves of Bimetallic Nano-Rhodium-Palladium
M. Ugalde,E. Chavira,M. T. Ochoa-Lara,I. A. Figueroa,C. Quintanar,A. Tejeda
Journal of Nanotechnology , 2013, DOI: 10.1155/2013/578684
Abstract: An improved acrylamide sol-gel technique using a microwave oven in order to synthesize bimetallic Rh-Pd particles is reported and discussed. The synthesis of Pd and Rh nanoparticles was carried out separately. The polymerization to form the gel of both Rh and Pd was carried out at 80°C under constant agitations. The method chosen to prepare the Rh and Pd xerogels involved the decomposition of both gels. The process begins by steadily increasing the temperature of the gel inside a microwave oven (from 80°C to 170°C). In order to eliminate the by-products generated during the sol-gel reaction, a heat treatment at a temperature of 1000°C for 2?h in inert atmosphere was carried out. After the heat treatment, the particle size increased from 50?nm to 200?nm, producing the bimetallic Rh-Pd clusters. It can be concluded that the reported microwave-assisted, sol-gel method was able to obtain nano-bimetallic Rh-Pd particles with an average size of 75?nm. 1. Introduction Bimetallic alloy (solid solutions or intermetallics compounds) nanostructures, synthesized from two single components, have been of interest because of their superior properties, in comparison with their respective single-component species, that is, Ag, Pd, Rh, and so forth [1]. The synthesis of noble metals and alloys, in nanometric scale, has been extensively investigated in nanotechnology because of their optical and electronic properties, as well as for their useful applications in many fields such as medicine [2], catalysis, and sensors [3–6]. Hardness, high melting and boiling points, and high thermal and electrical conductivity are some of the existing properties of these noble metals. Rhodium and palladium (Rh and Pd) crystallize in a face centered cubic (fcc) unit cell. Both metals add s electrons to the collective d band of palladium [7] and increase the lattice parameter of the palladium host lattice [8, 9]. It was found that rhodium behaves as an absorber of hydrogen at high pressure of gaseous hydrogen when situated within the palladium lattice [10, 11]. Recently, Pd nanocrystals have been prepared in aqueous solutions giving rise to a great variety of shapes, including truncated octahedron, cube, octahedron, and thin plate [12–14], making them ideal candidates as seeds for growing bimetallic nanostructures. The control of crystal size and its dispersion are among the main goals of nanocrystal preparation. This is due to the physicochemical properties of a bimetallic nanocrystal that can be tailored by controlling their particle size, shape, and elemental composition, as well as
Eficacia de la cuantificación de interleucina- 6 en el líquido cefalorraquídeo para el diagnóstico de meningitis bacteriana neonatal
Ortiz- Ibarra, Federico Javier;Reyna- Figueroa, Jesús;Aldana- Cuevas, Rodrigo Efrén;Lara- Sánchez, Jacqueline;
Boletín médico del Hospital Infantil de México , 2005,
Abstract: introduction. a great variety of cytokines are produced locally in the central nervous system in response to microbial infection, and their levels have been used as a diagnostic parameter of infection. objectives: to determine the concentrations of interleukin- 6 (il- 6) in cerebrospinal fluid (csf) of newborns with bacterial meningitis and the effectiveness of the determination as a diagnostic tool. material and methods. this was a prospective study from december 2002 to july 2003, in the instituto nacional de perinatologia (inper), in which the concentrations of il- 6 in the csf were measurered in newborns with a clinical diagnosis of sepsis. results. fourteen out of 58 newborns attended during the study period had bacterial meningitis.the mean il- 6 concentration in the meningitis group was 9 994 pg/ml vs 15.4 pg/ml in the control group (p <0.05). sensitivity was (92%),the specificity (100%);the positive predictive value and area under the roc curve support that il- 6 concentration of >50 pg/ml in csf are the cut- off level of neonatal bacterial meningitis. the concentrations of il- 6 in the csf were greater, demonstrating itself that concentrations of il- 6 equal or greater to 50 pg/ml have a sensitivity of 92% and a specificity of 100%, for the diagnosis of bacterial meningitis. conclusions. the determination of the concentration of il- 6 in csf could be a useful tool in the meningitis diagnosis; however csf conventional analysis and culture are still the gold standard.
Gum Chewing and Cognition: An Overview  [PDF]
Lara Tucha, Janneke Koerts
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.33028
Abstract: In recent years, there was a debate about the effects of gum chewing on various aspects of cognitive functioning. In this review, the results of previous studies are presented and summarized. There is a clear indication that gum chewing can improve various aspects of cognitive functioning including memory, attention and both executive and intellectual functioning. However, there is also clear evidence that chewing gum during cognitive tasks can adversely affect task performance. Therefore, it can be concluded that the replication of (beneficial or detrimental) effects of gum chewing on cognition has been proven to be very difficult. Consequently, the robustness of reported effects of gum chewing on cognition has to be questioned. Suggestions for future research are given.
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