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Search Results: 1 - 10 of 493850 matches for " R. Sánchez-Andrade "
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A los ni?os que tienen convulsiones febriles ?hay que administrarles anticonvulsivantes cuando tienen fiebre?
Aparicio,M.; Sánchez-Andrade,R.; González Rodríguez,M.P.;
Pediatría Atención Primaria , 2009, DOI: 10.4321/S1139-76322009000100009
Abstract: authors′ conclusion: in the first randomized controlled trial, the intermittent rectal diazepam (rd) prophylaxis reduces 45% the recurrence rates of febrile seizures in high risk patients (p = 0.005), 20% reduction in the intermediate-risk (p = 0.341) and only 13% in the low-risk children (p = 0.412). the side effects in the rd group were mild and transient and no long-term side effects during the 3-year follow-up were observed. the clinical practice guideline reviewed the literature with the aim of addressing possible therapeutic interventions in the management of children with simple febrile seizures and concluded that although there is evidence that both continuous antiepileptic therapy and intermittent therapy with oral diazepam (od) are effective in reducing the risk of recurrence, the potential toxicities associated with antiepileptic drugs outweigh the relatively minor risk associated with simple febrile seizures. in situations of parental anxiety associated with febrile seizures, intermittent od at the onset of febrile illness may be effective in preventing recurrence. reviewers′commentary: continuous antiepileptic therapy or intermittent therapy with diazepam, is not recommended because the risks outweigh the benefits. in situations with severe parental anxiety associated with febrile seizures, intermittent od or rd could be used at the onset of a febrile illness. the first choice is rd at a dose of 0.33 mg/kg with a total of three doses within the first 24 h from the onset of fever.
Observations, analysis and interpretation with non-LTE of chromospheric structures of the Sun
Bruno Sánchez-Andrade Nu?o
Physics , 2009,
Abstract: This thesis is based on observations performed at the Vacuum Tower Telescope (Tenerife). We have used an infrared spectropolarimeter (TIP) and a Fabry-Perot spectrometer (G-FPI) from years 2004 to 2006. We have applied several imaging speckle reconstruction techniques, and compared them. We have studied chromospheric dynamics inside the solar disc and at the limb using H\alpha with very high spatial, spectral and temporal resolution. Keywords (see full abstract for details): fibrils, surge, MHD waves, speckle, blind deconvolution, Fabry-Perot, mini-flares, cloud model, spicules in Halpha, spicules continuing on the disc) Using He I 10830 we studied the offlimb spicular spectral I profiles with height over the limb. The analysis shows the variation of the off-limb emission profiles as a function of the distance to the visible solar limb. The intensity ratio of the multiplet (which is related to the optical thickness and coronal irradiation) is studied and compared with standard atmospheric models. We report observational properties from high-resolution filtergrams in the H$\alpha$ spectral line taken with the G-FPI. We find that spicules can reach heights of 8 Mm above the limb. We show that spicules outside the limb continue as dark fibrils inside the disc.
Intrinsic Factors Influencing the Infection by Helminth Parasites in Horses under an Oceanic Climate Area (NW Spain)
I. Francisco,M. Arias,F. J. Corti as,R. Francisco,E. Mochales,V. Dacal,J. L. Suárez,J. Uriarte,P. Morrondo,R. Sánchez-Andrade,P. Díez-Ba os,A. Paz-Silva
Journal of Parasitology Research , 2009, DOI: 10.1155/2009/616173
Abstract: A coprological survey to determine the influence of some intrinsic factors (breed, age, and sex) on the infection by helminth parasites in equine livestock (=418) under an oceanic climate area (NW Spain) was conducted. Faecal samples were individually collected and analyzed by the coprological techniques. The main strongylid genera identified were Trichonema and Cyalocephalus spp (small strongyles) and Strongylus and Triodontophorus (large strongyles). The prevalence of gastrointestinal nematode was 89% (95% CI 86, 92) and 1% cestoda (0, 2). The percentage of horses with strongyloid parasites was 89% (86, 92), 11% (8, 14) for Parascaris, and 3% (1, 5) for Oxyuris. The highest prevalence for ascariosis was observed in the youngest horses (<3 years), for oxyurosis in the >10 years animals, and for strongylosis in the 3–10 years ones. Females were significantly more parasitized than males. A negative correlation between the age and the egg-excretion of ascarids and strongyles was recorded. The autochthonous and the English Pure Blood horses were the most parasitized. We concluded that the infections by helminths, especially the strongyloids, are significantly common in the region, so that greater importance should be given to this situation.
Genomic variation in the vomeronasal receptor gene repertoires of inbred mice
Wynn Elizabeth H,Sánchez-Andrade Gabriela,Carss Keren J,Logan Darren W
BMC Genomics , 2012, DOI: 10.1186/1471-2164-13-415
Abstract: Background Vomeronasal receptors (VRs), expressed in sensory neurons of the vomeronasal organ, are thought to bind pheromones and mediate innate behaviours. The mouse reference genome has over 360 functional VRs arranged in highly homologous clusters, but the vast majority are of unknown function. Differences in these receptors within and between closely related species of mice are likely to underpin a range of behavioural responses. To investigate these differences, we interrogated the VR gene repertoire from 17 inbred strains of mice using massively parallel sequencing. Results Approximately half of the 6222 VR genes that we investigated could be successfully resolved, and those that were unambiguously mapped resulted in an extremely accurate dataset. Collectively VRs have over twice the coding sequence variation of the genome average; but we identify striking non-random distribution of these variants within and between genes, clusters, clades and functional classes of VRs. We show that functional VR gene repertoires differ considerably between different Mus subspecies and species, suggesting these receptors may play a role in mediating behavioural adaptations. Finally, we provide evidence that widely-used, highly inbred laboratory-derived strains have a greatly reduced, but not entirely redundant capacity for differential pheromone-mediated behaviours. Conclusions Together our results suggest that the unusually variable VR repertoires of mice have a significant role in encoding differences in olfactory-mediated responses and behaviours. Our dataset has expanded over nine fold the known number of mouse VR alleles, and will enable mechanistic analyses into the genetics of innate behavioural differences in mice.
The Structure and Dynamics of the Upper Chromosphere and Lower Transition Region as Revealed by the Subarcsecond VAULT Observations
A. Vourlidas,B. Sánchez-Andrade Nu?o,E. Landi,S. Patsourakos,L. Teriaca,U. Schühle,C. M. Korendyke,I. Nestoras
Physics , 2009, DOI: 10.1007/s11207-009-9475-x
Abstract: The Very high Angular resolution ULtraviolet Telescope (VAULT) is a sounding rocket payload built to study the crucial interface between the solar chromosphere and the corona by observing the strongest line in the solar spectrum, the Ly-a line at 1216 {\AA}. In two flights, VAULT succeeded in obtaining the first ever sub-arcsecond (0.5") images of this region with high sensitivity and cadence. Detailed analyses of those observations have contributed significantly to new ideas about the nature of the transition region. Here, we present a broad overview of the Ly-a atmosphere as revealed by the VAULT observations, and bring together past results and new analyses from the second VAULT flight to create a synthesis of our current knowledge of the high-resolution Ly-a Sun. We hope that this work will serve as a good reference for the design of upcoming Ly-a telescopes and observing plans.
Modeling Partial Monosomy for Human Chromosome 21q11.2-q21.1 Reveals Haploinsufficient Genes Influencing Behavior and Fat Deposition
Anna M. Migdalska, Louise van der Weyden, Ozama Ismail, Jacqueline K. White, Sanger Mouse Genetics Project, Gabriela Sánchez-Andrade, Darren W. Logan, Mark J. Arends, David J. Adams
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0029681
Abstract: Haploinsufficiency of part of human chromosome 21 results in a rare condition known as Monosomy 21. This disease displays a variety of clinical phenotypes, including intellectual disability, craniofacial dysmorphology, skeletal and cardiac abnormalities, and respiratory complications. To search for dosage-sensitive genes involved in this disorder, we used chromosome engineering to generate a mouse model carrying a deletion of the Lipi–Usp25 interval, syntenic with 21q11.2-q21.1 in humans. Haploinsufficiency for the 6 genes in this interval resulted in no gross morphological defects and behavioral analysis performed using an open field test, a test of anxiety, and tests for social interaction were normal in monosomic mice. Monosomic mice did, however, display impaired memory retention compared to control animals. Moreover, when fed a high-fat diet (HFD) monosomic mice exhibited a significant increase in fat mass/fat percentage estimate compared with controls, severe fatty changes in their livers, and thickened subcutaneous fat. Thus, genes within the Lipi–Usp25 interval may participate in memory retention and in the regulation of fat deposition.
PM2.5 Estimation with the WRF/Chem Model, Produced by Vehicular Flow in the Lima Metropolitan Area  [PDF]
Warren Reátegui-Romero, Odón R. Sánchez-Ccoyllo, María de Fatima Andrade, Aldo Moya-Alvarez
Open Journal of Air Pollution (OJAP) , 2018, DOI: 10.4236/ojap.2018.73011
Abstract: Lima is the capital of the Republic of Peru. It is the most important city in the country and as other Latin America metropolises have multiple problems, including air pollution due to particulate material above air quality standards, emitted by 1.6 million vehicles. The “on-line” coupled model of meteorology and chemistry of transport and meteorological/chemistry, WRF/Chem (Weather and Research Forecasting with Chemistry) has been used in the Lima Metropolitan Area, and validated against data observed at ground level with ten air quality stations of the National Service of Meteorology and Hydrology for the year 2016. The goal of this study was to estimate the concentration of PM2.5 particulate matter in the months of February and July of 2016. In both months, the model satisfactorily predicts temperature and relative humidity. The average observed PM2.5 concentrations in the month of July are higher than in February, probably because the relative humidity in July is greater than the relative humidity in February. In the months of February and July the standard observed deviations of the model have a factor of 2.4 and 3.7 respectively, indicating a greater dispersion in the data of the model. In the month of July, the model captures the characteristics of transport, shows characteristic peaks during peak hours, therefore, the model estimates transport behavior better in July than in February. The quality of the air is strongly influenced by the vehicular transport. The PM2.5 particulate material in February had an average bias that varied from [?13.2 to 4.4 μg/m3] and in July [?9.63 to 11.65 μg/m3] and a normalized average bias in February that varied from [?0.68 to 0.43] and in July of [?0.46 to 0.48].
Demanda de mano de obra y rentabilidad de bancos forrajeros en Esparza, Costa Rica
Sánchez Sarmiento,Luz Yaneth; Andrade Casta?eda,Hernán Jaír; Rojas Molina,Jairo;
Acta Agronómica , 2010,
Abstract: we made a financial analysis in order to assess the feasibility to invest in fodder banks as an alternative for supplementing animals in dual purpose systems during the dry season (125 days). models were constructed to compare cutting and carrying of perennial woody fodder banks (veranera) cratylia argentea + sugar cane (saccharum officinarum) and browsing fodder banks of leucaena leucocephala with two supplements: concentrates and chicken manure. the indicators used for the financial evaluation of the systems were net present value (npv) and internal return rate (irr). a sensitivity analysis was carried out with an increase in milk, concentrate and chicken manure and labor prices. we found that perennial fodder banks required in average 71.1 man labor year-1 for their management. financial analysis showed that they are profitable when compared to chicken manure (npv= us$ 362.2; irr=17%) and concentrates (npv: us$ 1953.9; irr=39%). fodder banks with leucaena required 13 man labor year-1 for their management.. they are profitable when compared to chicken manure (npv=us$1594.7; irr=21%) and with concentrates (npv=us$3619.6; irr=35%). the models were sensible to changes in milk production, reduction in price of chicken manure and concentrates and reduction both in the labor price and price of milk. in summary, fodder banks are a good alternative for supplementing animal in the dry season and an important source of employment in the region; nevertheless, the high cost of hired labor could limit their adoption.
Demanda de mano de obra y rentabilidad de bancos forrajeros en Esparza, Costa Rica
Sánchez Sarmiento Luz Yaneth,Andrade Casta?eda Hernán Jaír,Rojas Molina Jairo
Acta Agronómica , 2010,
Abstract: En Esparza (Costa Rica) se evaluó la viabilidad de invertir en bancos forrajeros (BF) como alternativa de suplementación para vacas en sistema doble propósito durante la época seca (125 días). Se usaron como indicadores de rentabilidad el Valor Presente Neto (VPN) y la Tasa Interna de Retorno (TIR). Se realizó un análisis de sensibilidad para el incremento del precio de la leche, los concentrados, la gallinaza y la mano de obra. Los modelos se elaboraron comparando los BF de plantas le osas perennes de corte y acarreo de Cratylia argentea + ca a de azúcar (Saccharum officinarum) (BFC) y de ramoneo Leucaena leucocephala (BFL) vs. suplementos comerciales tipos concentrado y gallinaza. En los BFC se requirieron 71.1 jornales/a o y el análisis financiero indicó que son rentables al compararlos con la gallinaza (VPN = US$362.2, TIR = 17%) y concentrados (VPN = US$1953.9; TIR=39%). En BFL se requirieron 13 jornales/a o y fueron igualmente rentables en comparación con gallinaza (VPN = US$1594.7; TIR = 21%) y con concentrados (VPN = US$3619.6; TIR=35%). Los modelos fueron sensibles a la producción y cambios de precios en la leche, gallinaza, concentrados y el valor del jornal. Los BF son una buena alternativa para la suplementación de ganado en la época seca y una importante fuente de empleo en la región; sin embargo, los altos costos de la mano de obra contratada pueden limitar la adopción.
Análisis del grado de conocimiento declarativo y procedural de estudiantes en cursos de física universitaria
J. R. Martínez,C. Araujo-Andrade,S. A. Palomares-Sánchez,G. Ortega-Zarzosa
Revista mexicana de física , 2006,
Abstract: Se analiza el grado de retención de conocimiento del alumno después de haber pasado por un curso de física universitaria y la habilidad para enfrentar problemas abiertos que poseen, como la mayoría de los problemas académicos, una solución conocida por anticipado. El análisis se enfoca al grado de conocimiento declarativo y de procedimiento, este último utilizando el grado de categorización basado en valoraciones de las resoluciones en un estudio semicuantitativo con base en etapas dise adas para el análisis de respuestas escritas y cerradas de acuerdo con metodologías estándar. De los resultados inferimos que el proceso de aprendizaje al que fueron sometidos los alumnos en cuestión provocó solamente una memoria semántica rutinaria sin llegar a producir conocimientos semánticos significativos, debido a la ausencia de trabajo de procedimiento, que propicia un alejamiento de la ense anza científica.
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