oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 2 )

2019 ( 487 )

2018 ( 615 )

2017 ( 610 )

Custom range...

Search Results: 1 - 10 of 368527 matches for " Germán E; Hernández-Torres "
All listed articles are free for downloading (OA Articles)
Page 1 /368527
Display every page Item
Perfil epidemiológico general de las quejas médicas atendidas en la Comisión Nacional de Arbitraje Médico. 1996-2007
Fajardo-Dolci,Germán E; Hernández-Torres,Francisco; Santacruz-Varela,Javier; Hernández-ávila,Mauricio; Kuri-Morales,Pablo; Gómez-Bernal,Enrique;
Salud Pública de México , 2009, DOI: 10.1590/S0036-36342009000200007
Abstract: objective: to analyze medical complaints over a period of 11 years, for making recommendations for prevention and improving planning for responding. material and methods: we studied the medical complaints at the national medical arbitration commission (conamed, per its acronym in spanish) between 1996 and 2007 using descriptive statistics to identify their general profile in relation to the variables of time, place and person. we also studied the frequency of evident medical malpractice as well as the severity of the damage it produces. results: the request for responses to medical complaints increased between 1996 and 2007 and there was less demand between july and december. two states in the country account for 69.7% of the complaints and 74.0% are from public institutions. fifty-eight percent come from women and the 25-34 and 65+ age groups have the highest percentage. we found in 27.0% of the complaints there is evidence of medical malpractice and obstetrics and gynecology have the highest percentage of complaints, physical harm and severity of injury. complaints about treatment are nearly four times more than diagnosis. conclusions: it is necessary to improve the quality of diagnosis and treatment and identify cost-effective measures to reduce medical malpractice and the severity of physical damage in patients.
Perfil epidemiológico de la mortalidad por influenza humana A (H1N1) en México
Fajardo-Dolci,Germán E; Hernández-Torres,Francisco; Santacruz-Varela,Javier; Rodríguez-Suárez,Javier; Lamy,Philippe; Arboleya-Casanova,Heberto; Gutiérrez-Vega,Rafael; Manuell-Lee,Gabriel; Córdova-Villalobos,José ángel;
Salud Pública de México , 2009, DOI: 10.1590/S0036-36342009000500003
Abstract: objective: to carry out the epidemiological analysis of 122 influenza a (h1n1) deaths confirmed by laboratory and help to improve the diagnosis and timely managing of cases. material and methods: a total of 122 clinical records were analyzed of patients with confirmed influenza a (h1n1) virus infection who died. results: fifty-one percent of patients were female and 49% were male. a total of 45.l% who died were between 20 and 39 years old. overall fatality was 2.2% and ranged between 0.3% for the l0 to l9 year-old group to 6.3% for the 50 to 59 year-old group. forty-three percent of deaths were concentrated in only two of the thirty-two states and 5l% received medical attention in social security institutions. only l7% received hospital attention within 72 hours and 42% died within 72 hours of hospital attention. discussion: novel influenza a (h1n1) virus produces higher mortality in young people whereas seasonal influenza has a greater impact on young children and older people. delay in medical care and the associated morbidity were relevant factors for death.
Prevalencia de desnutrición en menores de cinco a os de Tabasco
Lastra-Escudero Lucio G.,Roldán-Fernández Silvia G.,Hernández-Martínez Enrique,Hernández-Torres Alma Patricia
Salud Pública de México , 1998,
Abstract: Objetivo. Evaluar la prevalencia de desnutrición que se presentó en ni os tabasque os menores de cinco a os en 1996, y su evolución entre 1991 y 1996. Material y métodos. Se realizó un estudio de corte transversal que incluyó a 1 256 ni os de 593 comunidades (31 urbanas y 562 rurales) de los 17 municipios de Tabasco. Resultados. El indicador peso/edad registró 41% de prevalencia de desnutrición, distribuida en leve (26.12%), moderada (12.62%) y severa (2.39%). En ni os de entre 1 y 5 a os la prevalencia de desnutrición fue de 45%. Conclusiones. De 1991 a 1996 la cifra de ni os con desnutrición ha disminuido proporcionalmente al incremento de la nutrición normal. Asimismo, han disminuido de seis a cuatro los municipios con indicadores críticos de desnutrición, con base en las acciones del sector salud en el estado de Tabasco.
The Respiratory Exchange Ratio is Associated with Fitness Indicators Both in Trained and Untrained Men: A Possible Application for People with Reduced Exercise Tolerance
Arnulfo Ramos-Jiménez,Rosa P. Hernández-Torres,Patricia V. Torres-Durán,Jaime Romero-Gonzalez
Clinical Medicine : Circulatory, Respiratory and Pulmonary Medicine , 2008,
Abstract: Background: The respiratory exchange ratio (RER) indirectly shows the muscle′s oxidative capacity to get energy. Sedentarism, exercise and physically active lifestyles modify it. For that reason, this study evaluates the associations between RER during sub-maximum exercise and other well established fitness indicators (body fat, maximum heart rate, maximum O2 uptake, workload, and lactate threshold), in physically active trained and untrained men.Methods: The RER, O2 uptake and blood lactate were measured in eight endurance trained and eight untrained men (age, 22.9 ± 4.5 vs. 21.9 ± 2.8 years; body mass, 67.1 ± 5.4 vs. 72.2 ± 7.7 kg; body fat, 10.6 ± 2.4% vs. 16.6 ± 3.8% and maximum O2 uptake, 68.9 ± 6.3 vs. 51.6 ± 5.8 ml kg 1 min 1), during maximum exercise test and during three different sub-maximum exercises at fixed workload: below, within or above the lactate threshold.Results: Endurance trained men presented higher O2 uptake, lower blood lactate concentrations and lower RER values than those in untrained men at the three similar relative workloads. Even though with these differences in RER, a strong association (p < 0.05) of RER during sub-maximum exercise with the other well established fitness indicators was observed, and both maximum O2 uptake and lactate threshold determined more than 57% of its variance (p < 0.05).Conclusions: These data demonstrate that RER measurement under sub-maximum exercise conditions was well correlated with other established physical fitness indicators, despite training condition. Furthermore, the results suggest that RER could help obtain an easy approach of fitness status under low exercise intensity and could be utilized in subjects with reduced exercise tolerance.
A study of TiAlN coatings prepared by rf co-sputtering
García-González, L.;Garnica-Romo, M. G.;Hernández-Torres, J.;Espinoza-Beltrán, F. J.;
Brazilian Journal of Chemical Engineering , 2007, DOI: 10.1590/S0104-66322007000200009
Abstract: using the reactive magnetron rf co-sputtering technique and a ti target partially covered with a small al plate, tialn coatings were made on c-si in a reactive atmosphere of nitrogen and argon. coatings were deposited on substrates at 22°c and at 150°c. the substrate temperature notably affected the thickness, crystalline grain size, and hardness of the coatings. we analyzed the dependence of both structure and crystalline grain sizes on substrate temperature and the chemical composition of the coatings. the structural properties and the chemical composition were obtained by means of xrd and eds techniques. high aluminum content was found in the coatings for the samples grown at the lower substrate temperature when samples were measured by electron dispersive spectroscopy technique. atomic force microscopy measurements showed a surface morphology dependent on the nitrogen content. scanning electron microscopy measurements showed a clear pyramidal microstructure of tialn coatings grown at 22°c, while the microstructure of those grown at a substrate temperature of 150°c were not well defined.
Efecto de la sequía en la producción de biomasa y grano de frijol Drought effect in bean biomass and grain production
Efraín Acosta-Díaz,Ismael Hernández-Torres,Raúl Rodríguez-Guerra,Jorge Alberto Acosta-Gallegos
Revista mexicana de ciencias agrícolas , 2011,
Abstract: La sequía intermitente es el factor que más limita la producción de frijol (Phaseolus vulgaris L.) bajo temporal en México. El objetivo fue determinar el efecto de la sequía sobre la acumulación de biomasa del vástago y el rendimiento de grano en variedades criollas e introducidas de frijol de temporal. Se establecieron dos experimentos, uno con 21 variedades nativas y otro con 15 variedades introducidas, de diferente hábito de crecimiento indeterminado, en la Unidad Académica La Ascensión de la Facultad de Agronomía de la Universidad Autónoma de Nuevo León, México en 2009. Los experimentos se condujeron bajo dos tratamientos de humedad del suelo: riego durante todo el ciclo y sequía. En el tratamiento de riego el suelo se mantuvo por encima de 60% de humedad aprovechable durante el ciclo del cultivo, mediante la precipitación y cuatro riegos de auxilio (dos antes y otros dos después de floración), mientras que en el tratamiento de sequía el riego se suspendió a partir del inicio de la floración. En los dos experimentos, bajo la condición de sequía la acumulación de biomasa del vástago y el rendimiento de grano fue significativamente inferior (p≤ 0.01) que en el tratamiento de riego. En general, el efecto del tratamiento de sequía sobre el peso seco del vástago fue mayor en las variedades nativas, mientras que el efecto sobre el rendimiento de grano fue mayor en las variedades introducidas. En sequía, las variedades de mayor rendimiento, fueron: nativas, Pinto-2, Pinto-1, Amarillo Mantequilla, Boleado, Bayo Blanco, Canelo y Quipincillo Rojo-1 e introducidas, Peruano, Flor de Mayo Media Oreja, Pinto-5 y Ojo de Cabra. De acuerdo con el índice de susceptibilidad a la sequía y la media geométrica, las variedades más eficientes para la producción de rendimiento de grano en ambas condiciones de humedad fueron: Pinto-2, Amarillo Mantequilla, Pinto-1, Boleado, Peruano, Flor de Mayo Media Oreja, Pinto-5 y Ojo de Cabra; sin excepción, todas estas variedades fueron colectadas en la región de prueba, lo que demuestra la importancia de la adaptación local en condiciones de sequía. Intermittent drought is most limiting factor for bean production (Phaseolus vulgaris L.) under seasonal conditions in Mexico. Aim of this work was to determine drought effect on biomass accumulation of sprout and grain yield in creole and introduced seasonal bean varieties. Two experiments were set, one with 21 native varieties and another with 15 introduced varieties, from different uncertain type growth habit, at Academic Unit La Asención from Agronomy School of Universidad Autónoma de Nu
Prevalencia de desnutrición en menores de cinco a?os de Tabasco
Lastra-Escudero,Lucio G.; Roldán-Fernández,Silvia G.; Hernández-Martínez,Enrique; Hernández-Torres,Alma Patricia; Lechuga-Padrón,Félix Gerardo;
Salud Pública de México , 1998, DOI: 10.1590/S0036-36341998000500004
Abstract: objective. to evaluate malnutrition prevalence in children under five years-old in tabasco, mexico, during 1996, and their evolution in 1991-1996. material and methods. a cross-sectional study, including 1 256 children under five years-old in 593 communities (31 urban and 562 rural) from 17 sanitary districts. results. the weight/age indicator for malnutrition in children under five years old showed 59% of children had normal nutrition and 41% with malnutrition, distributed as follows: 26.12% slight, 12.62% moderate and 2.39% severe. in children between 1-5 years old, malnutrition prevalence was 45%. conclusions. the number of children with malnutrition in tabasco during the study period (1991-1996) has decreased in proportion to the increase of those with normal nutrition. based on the health system activities, the number of health districts with critical malnutrition indicators decreased from 6 to 4.
The Respiratory Exchange Ratio is Associated with Fitness Indicators Both in Trained and Untrained Men: A Possible Application for People with Reduced Exercise Tolerance
Arnulfo Ramos-Jiménez, Rosa P. Hernández-Torres, Patricia V. Torres-Durán, Jaime Romero-Gonzalez, Dieter Mascher, Carlos Posadas-Romero and Marco A. Juárez-Oropeza
Clinical Medicine Insights: Circulatory, Respiratory and Pulmonary Medicine , 2012,
Abstract: Background: The respiratory exchange ratio (RER) indirectly shows the muscle′s oxidative capacity to get energy. Sedentarism, exercise and physically active lifestyles modify it. For that reason, this study evaluates the associations between RER during sub-maximum exercise and other well established fitness indicators (body fat, maximum heart rate, maximum O2 uptake, workload, and lactate threshold), in physically active trained and untrained men. Methods: The RER, O2 uptake and blood lactate were measured in eight endurance trained and eight untrained men (age, 22.9 ± 4.5 vs. 21.9 ± 2.8 years; body mass, 67.1 ± 5.4 vs. 72.2 ± 7.7 kg; body fat, 10.6 ± 2.4% vs. 16.6 ± 3.8% and maximum O2 uptake, 68.9 ± 6.3 vs. 51.6 ± 5.8 ml kg 1 min 1), during maximum exercise test and during three different sub-maximum exercises at fixed workload: below, within or above the lactate threshold. Results: Endurance trained men presented higher O2 uptake, lower blood lactate concentrations and lower RER values than those in untrained men at the three similar relative workloads. Even though with these differences in RER, a strong association (p < 0.05) of RER during sub-maximum exercise with the other well established fitness indicators was observed, and both maximum O2 uptake and lactate threshold determined more than 57% of its variance (p < 0.05). Conclusions: These data demonstrate that RER measurement under sub-maximum exercise conditions was well correlated with other established physical fitness indicators, despite training condition. Furthermore, the results suggest that RER could help obtain an easy approach of fitness status under low exercise intensity and could be utilized in subjects with reduced exercise tolerance.
Efecto de la sequía en la producción de biomasa y grano de frijol
Acosta-Díaz, Efraín;Hernández-Torres, Ismael;Rodríguez-Guerra, Raúl;Pedroza-Flores, Jesús;Amador-Ramírez, Mario D.;Padilla-Ramírez, José Saúl;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: intermittent drought is most limiting factor for bean production (phaseolus vulgaris l.) under seasonal conditions in mexico. aim of this work was to determine drought effect on biomass accumulation of sprout and grain yield in creole and introduced seasonal bean varieties. two experiments were set, one with 21 native varieties and another with 15 introduced varieties, from different uncertain type growth habit, at academic unit la asención from agronomy school of universidad autónoma de nuevo león, mexico in 2009. experiments were done under two treatments of soil humidity: irrigation during whole cycle and drought. in irrigation treatment soil was kept above 60% of serviceable humidity during cultivation cycle, by precipitation and four irrigation aids (two before and other two after flowering), while in treatment of drought irrigation was suspended when flowering started. in both experiments, under drought condition biomass accumulation of sprout and grain yield was significantly lower (p≤ 0.01) than in irrigation treatment. in general, effect of drought treatment on sprout's dry weight was greater in native varieties, while effect on grain yield was greater in introduced varieties. in drought, varieties with higher yield were: native, pinto-2, pinto-1, amarillo mantequilla, boleado, bayo blanco, canelo and quipincillo rojo-1; and introduced, peruano, flor de mayo media oreja, pinto-5 and ojo de cabra. in accordance with drought susceptibility index and geometric average, most efficient varieties for production of grain yield under both humidity conditions were: pinto-2, amarillo mantequilla, pinto-1, boleado, peruano, flor de mayo media oreja, pinto-5 and ojo de cabra; without exception, all these varieties were collected in test region, which demonstrates importance of local adaptation under drought conditions.
The Prefoldin Bud27 Mediates the Assembly of the Eukaryotic RNA Polymerases in an Rpb5-Dependent Manner
María Carmen Mirón-García,Ana Isabel Garrido-Godino,Varinia García-Molinero,Francisco Hernández-Torres,Susana Rodríguez-Navarro,Francisco Navarro
PLOS Genetics , 2013, DOI: 10.1371/journal.pgen.1003297
Abstract: The unconventional prefoldin URI/RMP, in humans, and its orthologue in yeast, Bud27, have been proposed to participate in the biogenesis of the RNA polymerases. However, this role of Bud27 has not been confirmed and is poorly elucidated. Our data help clarify the mechanisms governing biogenesis of the three eukaryotic RNA pols. We show evidence that Bud27 is the first example of a protein that participates in the biogenesis of the three eukaryotic RNA polymerases and the first example of a protein modulating their assembly instead of their nuclear transport. In addition we demonstrate that the role of Bud27 in RNA pols biogenesis depends on Rpb5. In fact, lack of BUD27 affects growth and leads to a substantial accumulation of the three RNA polymerases in the cytoplasm, defects offset by the overexpression of RPB5. Supporting this, our data demonstrate that the lack of Bud27 affects the correct assembly of Rpb5 and Rpb6 to the three RNA polymerases, suggesting that this process occurs in the cytoplasm and is a required step prior to nuclear import. Also, our data support the view that Rpb5 and Rpb6 assemble somewhat later than the rest of the complexes. Furthermore, Bud27 Rpb5-binding but not PFD-binding domain is necessary for RNA polymerases biogenesis. In agreement, we also demonstrate genetic interactions between BUD27, RPB5, and RPB6. Bud27 shuttles between the nucleus and the cytoplasm in an Xpo1-independent manner, and also independently of microtubule polarization and possibly independently of its association with the RNA pols. Our data also suggest that the role of Bud27 in RNA pols biogenesis is independent of the chaperone prefoldin (PFD) complex and of Iwr1. Finally, the role of URI seems to be conserved in humans, suggesting conserved mechanisms in RNA pols biogenesis.
Page 1 /368527
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.