Entre 1960 y 1980 el Área Metropolitana de Monterrey (en adelante, AMM) experimenta un auge gradual de su estructura geoeconómica, reduciendo su importancia relativa de las manufacturas y aumento de los servicios, con ello eleva su... more
Entre 1960 y 1980 el Área Metropolitana de Monterrey (en adelante, AMM) experimenta un auge gradual de su estructura geoeconómica, reduciendo su importancia relativa de las manufacturas y aumento de los servicios, con ello eleva su economía y participación nacional. Posteriormente en el periodo comprendido entre 1970 y 1990, el AMM se posiciona como la tercera ciudad en importancia demográfica en México. En las últimas dos décadas, se consolida como capital de servicios en la región noreste de México. Ello ha provocado un intenso fenómeno de inmigración en busca de una mejor calidad de vida. El resultado ha propiciado un crecimiento urbano con ciertos impactos medioambientales y sociales, una urbanización sin dotación de equipamiento, altos costos y tiempos para el desplazamiento, una fragmentación territorial, un incremento de inseguridad y una delincuencia organizada. Este estudio caracteriza y describe las tipologías de segregación residencial y su impacto urbano en un ámbito con...
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RESUMENEn Honduras ocurren cinco especies de felinos, jaguar (Panthera onca), puma (Puma concolor), ocelote (Leopardus pardalis), caucel (Leopardus wiedii) y el yaguarundí (Puma yagouaroundi). Se comparó la composición de las cinco... more
RESUMENEn Honduras ocurren cinco especies de felinos, jaguar (Panthera onca), puma (Puma concolor), ocelote (Leopardus pardalis), caucel (Leopardus wiedii) y el yaguarundí (Puma yagouaroundi). Se comparó la composición de las cinco especies de felinos en 15 áreas naturales protegidas, las cuales se agruparon en tres regiones con diferentes zonas de vida, ecosistemas y gradientes altitudinal siendo estas; la región Moskitia, la región Central y la región Caribe. Se evaluó la detección de felinos con la presencia/ausencia en cada área. Se realizó un dendrograma y un análisis no métrico multidimensional para comparar la similitud entre áreas protegidas y especies. El hallazgo significativo es la ausencia del jaguar en las áreas protegidas de la región Central de Honduras, donde posiblemente se ha dado su extirpación. El puma, el ocelote, el caucel y el yaguarundí, se registran en las tres regiones del país. Al comparar la composición de los felinos en las tres regiones usando el análi...
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RESUMENEl oso hormiguero gigante también conocido en Centro América como oso caballo (Myrmecophaga tridactyla), es una de las especies carismáticas del mundo. Se ha documentado en la literatura que los límites de la distribución más... more
RESUMENEl oso hormiguero gigante también conocido en Centro América como oso caballo (Myrmecophaga tridactyla), es una de las especies carismáticas del mundo. Se ha documentado en la literatura que los límites de la distribución más septentrional para esta especie son Belice y Guatemala. El mapa de su distribución para Centro América da inicio en toda la franja Caribe de Panamá e incluye todo el territorio de Costa Rica, Nicaragua, Honduras, El Salvador y una mínima porción de la costa del Caribe de Guatemala y Belice. Sin embargo, M. tridactyla no se registra en los últimos 100 años para Guatemala, Belice y El Salvador. En Honduras se realizaron diferentes monitoreos en la región Caribe y Moskitia registrándose fotocapturas del oso caballo únicamente en la Reserva de la Biosfera del Río Plátano y la Reserva propuesta de Rus Rus. Este análisis propone como límite septentrional de la distribución del M. tridactyla la región de la Moskitia hondureña, basados en la ausencia de esta esp...
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The objective of this study was to evaluate the clinical efficacy of 5% sodium hypochlorite solution for removal of stains caused by dental fluorosis in young patients. A clinical trial involved 33 patients with diffuse opacities on the... more
The objective of this study was to evaluate the clinical efficacy of 5% sodium hypochlorite solution for removal of stains caused by dental fluorosis in young patients. A clinical trial involved 33 patients with diffuse opacities on the enamel surfaces of maxillary incisors due to effects of dental fluorosis. The protocol of treatment 3 steps:(1) cleaning and enamel etching with 37% phosphoric acid in order to eliminate the layer that covers the fluorotic enamel surface and allow better penetration of the bleaching agent,(2) application of 5% sodium hypochlorite to remove stains caused by organic material, and (3) filling the opened microcavities with a light-cured, composite surface sealant to prevent restaining. The whiteness of the enamel lesions before and after treatment were expressed in L*, a*, and b* color space measurements using a Minolta Chroma Meter CR300. Analysis of parameters of ¢E (L*, a*, b*) showed that changes were observed in the L* (brightness) and a* (redness),...
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Among the aeroallergens associated to asthma and allergic rhinitis, the fungi are a common cause of diagnostic and therapeutic problems. The wide variety and distribution of fungal species and the complex characterization of their... more
Among the aeroallergens associated to asthma and allergic rhinitis, the fungi are a common cause of diagnostic and therapeutic problems. The wide variety and distribution of fungal species and the complex characterization of their allergenicity, is a complex item. The fungus extracts used to diagnose and treat sensitizations are frequently non effective, and different varieties of extracts are globally distributed. The standardization of commercial fungi extracts results extremely important as diagnostic procedure as well as to decide an efficacious and safe immunotherapy. This paper reviews important methodological steps to the standardization of fungi extracts, and finally the clinical use of these extracts.
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The polysaccharidic integument surrounding growing cells of attenuated Mycobacterium bovis Bacillus Calmette-Guérin (BCG) vaccine, Connaught substrain, can be removed with non-specific proteases. After 5 weeks incubation at 37 degrees C... more
The polysaccharidic integument surrounding growing cells of attenuated Mycobacterium bovis Bacillus Calmette-Guérin (BCG) vaccine, Connaught substrain, can be removed with non-specific proteases. After 5 weeks incubation at 37 degrees C in Middlebrook 7H-9 medium, the collected cells were incubated with pronase and the integument and cells separated by centrifugation in a Ficoll-Histopaque preparation. After washing and drying, the detached integument accounted for 65% w/w of the original dried cell mass. Like the original cellular material, the detached integument manifested antineoplastic activity against a murine sarcoma model in vivo. Solubilization of the otherwise insoluble integument by boiling in water or by digestion in 8 M urea significantly enhanced activity of the integument itself, by 125 and 1,100 times, respectively. Integument extracts were shown to contain mainly glucose, with smaller quantities of other sugars, consistent with the presence in BCG of high molecular ...
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ABSTRACT This paper evaluates, under a descriptive approach if, by means of their loan guarantee programs, the Mexican government-owned financial institutions have succeeded in promoting the private banks credit supply to targeted... more
ABSTRACT This paper evaluates, under a descriptive approach if, by means of their loan guarantee programs, the Mexican government-owned financial institutions have succeeded in promoting the private banks credit supply to targeted segments of private businesses; fostered the granting of loans that help the competitiveness of private businesses, and, improved the credit terms of the private bank loans to the targeted population. Our database comprises over 23 million loan records. Results point to mixed indications on the aforementioned goals achievement.
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Research Interests: Immunology, Electron Microscopy, Medical Microbiology, Biology, Scanning Electron Microscopy, and 15 moreTransmission Electron Microscopy, Medicine, Mycobacterium, Ultrastructure, Glucans, Phagocytosis, Cell Wall, Peptidoglycan, Cell Surface Markers, Mycobacterium bovis, Molecular Structure, Cell Envelope, Electron Microscope, Cell Membrane, and Cardiovascular medicine and haematology
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OBJECTIVE To investigate the associations of markers of insulin resistance with cardiovascular disease risk factors and inflammation in young, normal-weight, Hispanic women. RESEARCH DESIGN AND METHODS Seventy-one normal-weight (BMI... more
OBJECTIVE To investigate the associations of markers of insulin resistance with cardiovascular disease risk factors and inflammation in young, normal-weight, Hispanic women. RESEARCH DESIGN AND METHODS Seventy-one normal-weight (BMI <25 kg/m2) Hispanic women (age, 20–39 years) participated in a fasting blood draw for glucose, insulin, lipids, and inflammatory markers; a glucose tolerance test; anthropometric and blood pressure measurements; body composition by dual-energy x-ray absorptiometry; and measurements of cardiorespiratory fitness via Vo2max and daily physical activity by accelerometer. RESULTS Six percent of participants had impaired fasting glucose, 14% had impaired glucose tolerance, and 48% had at least one cardiovascular disease risk factor. Homeostasis model assessment of insulin resistance (HOMA-IR) and fasting insulin were positively correlated with glucose, triglycerides, systolic blood pressure, and diastolic blood pressure, and were negatively correlated with a...
Research Interests: Endocrinology, Cytokines, Public Health, Medicine, Insulin Resistance, and 15 moreHumans, Internal Medicine, Insulin, Diabetes mellitus, Blood Pressure, Female, Body Composition, Risk factors, Adiponectin, Adult, Cardiovascular Diseases, Body Weight, Risk Factors, Diabetes Care, and Medical and Health Sciences
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... Alain R. Rodríguez Orozco,* Héctor Ruiz Reyes,** Víctor Manuel Farias Rodríguez,*** Jorge Cruz Balan-dran,**** Lidia Manzo Rodríguez,1 Eduardo ... críticos en la atención de pacientes alérgicos tratados por especialistas no... more
... Alain R. Rodríguez Orozco,* Héctor Ruiz Reyes,** Víctor Manuel Farias Rodríguez,*** Jorge Cruz Balan-dran,**** Lidia Manzo Rodríguez,1 Eduardo ... críticos en la atención de pacientes alérgicos tratados por especialistas no alergólogos y que se remitieron a la consulta ...