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Search Results: 1 - 10 of 462175 matches for " Fredy A. Monserrate "
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Metodología para seleccionar zonas de intervención con cultivos biofortificados
Monserrate Rojas,Fredy A.; Pachón,Helena; Hyman,Glenn G.; Vesga Varela,Andrea L.;
Revista Panamericana de Salud Pública , 2009, DOI: 10.1590/S1020-49892009001100006
Abstract: objective: to identify geographical areas in latin america and the caribbean where biofortification of staple crops, such as beans, corn, rice, cassava, and sweet potatoes, might help reduce nutritional deficiencies in the region. methods: a geographic information system (gis) was produced with records on nutritional risks, crop production, food consumption, and demographic and socioeconomic data, for 11 countries in the region. four case studies were conducted (in bolivia, colombia, guatemala, and mexico) using exploratory and descriptive analysis of thematic maps that were superimposed and compared to reveal overlapping and spatial patterns, thereby identifying areas suited to intervention. results: in guatemala, the highest rates of nutritional risk, bean production, and population density overlapped in the northeast and southeast areas. in mexico, spatial distribution of the highest risk levels for nutrition, poverty, and corn production were concentrated in the central and southern municipalities. in bolivia, bean production tended to be in the eastern part of the country, and nutritional risk, in the west. in colombia, both nutritional risk and cassava production showed wide geographic dispersion. conclusions: for guatemala, we propose iron biofortification of beans in the southern parts of the northeast and southeast; for mexico, amino-acid biofortification of corn in the central and southern municipalities that produce it; for bolivia, iron and zinc biofortification of beans in the bean-producing areas of santa cruz, chuquisaca, and tarija; and for colombia, β-carotene biofortification of cassava in the cordoba and cundinamarca departments.
Drought Tolerance in Wild Plant Populations: The Case of Common Beans (Phaseolus vulgaris L.)
Andrés J. Cortés, Fredy A. Monserrate, Julián Ramírez-Villegas, Santiago Madri?án, Matthew W. Blair
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0062898
Abstract: Reliable estimations of drought tolerance in wild plant populations have proved to be challenging and more accessible alternatives are desirable. With that in mind, an ecological diversity study was conducted based on the geographical origin of 104 wild common bean accessions to estimate drought tolerance in their natural habitats. Our wild population sample covered a range of mesic to very dry habitats from Mexico to Argentina. Two potential evapotranspiration models that considered the effects of temperature and radiation were coupled with the precipitation regimes of the last fifty years for each collection site based on geographical information system analysis. We found that wild accessions were distributed among different precipitation regimes following a latitudinal gradient and that habitat ecological diversity of the collection sites was associated with natural sub-populations. We also detected a broader geographic distribution of wild beans across ecologies compared to cultivated common beans in a reference collection of 297 cultivars. Habitat drought stress index based on the Thornthwaite potential evapotranspiration model was equivalent to the Hamon estimator. Both ecological drought stress indexes would be useful together with population structure for the genealogical analysis of gene families in common bean, for genome-wide genetic-environmental associations, and for postulating the evolutionary history and diversification processes that have occurred for the species. Finally, we propose that wild common bean should be taken into account to exploit variation for drought tolerance in cultivated common bean which is generally considered susceptible as a crop to drought stress.
Identifying candidate sites for crop biofortification in Latin America: case studies in Colombia, Nicaragua and Bolivia
Emmanuel Zapata-Caldas, Glenn Hyman, Helena Pachón, Fredy Monserrate, Liliana Varela
International Journal of Health Geographics , 2009, DOI: 10.1186/1476-072x-8-29
Abstract: Nutrient deficiency risk data were combined with crop production and socioeconomic data to assess the suitability of establishing an intervention. Our analysis developed maps of candidate sites for biofortification interventions for nine countries in Latin America and the Caribbean. Results for Colombia, Nicaragua, and Bolivia are presented in this paper. Interventions in northern Colombia appear promising for all crops, while sites for bean biofortification are widely scattered throughout the country. The most promising sites in Nicaragua are found in the center-north region. Candidate sites for biofortification in Bolivia are found in the central part of the country, in the Andes Mountains. The availability and resolution of data limits the analysis. Some areas show opportunities for biofortification of several crops, taking advantage of their spatial coincidence. Results from this analysis should be confirmed by experts or through field visits.This study demonstrates a method for identifying candidate sites for biofortification interventions. The method evaluates populations at risk of nutrient deficiencies for sub-national administrative regions, and provides a reasonable alternative to more costly, information-intensive approaches.The most common strategies to address vitamin, amino acid and mineral deficiencies are diet diversification, supplementation and fortification. A relatively new strategy – biofortification – is the improvement of agronomic characteristics and the nutritional content of crops through agronomy, plant breeding and biotechnology [1]. Biofortification can be achieved through agronomic or genetic approaches [2].Agronomic strategies to biofortify crops include fertilizer and soil management to increase the amount of nutrients available for absorption by the plant. While these soil management strategies have proved successful in many cases [2], the present study seeks to identify locations where new crop varieties, developed through plant bre
Evaluation of an Andean common bean reference collection under drought stress Evaluation of an Andean common bean reference collection under drought stress
Pérez Vega Juan Carlos,Blair Matthew W.,Monserrate Fredy,Ligarreto Moreno Gustavo Adolfo
Agronomía Colombiana , 2011,
Abstract: More than 60% of common bean (Phaseolus vulgaris L.) production worldwide is impacted by the risk of drought. In this study, the goal was to evaluate 64 bush bean genotypes from the CIAT reference collection to identify possible sources of drought resistance in the Andean gene pool. Phenotypic traits such as yield, 100-seed weight (P100) and days to physiological maturity (Dpm) were evaluated on selected accessions of this collection which was grown in an 8x8 lattice with two repetitions under three environments: intermittent drought (SI) and irrigation (R) in Palmira as well as early drought (ST) in Darién, Colombia. The genotypes included 20 from the Nueva Granada 1 (NG1) sub-race, 19 from the Nueva Granada 2 (NG2) sub-race, 10 from race Peru (P), 14 Andean control genotypes and one Mesoamerican check. The variables were analyzed through a combined ANOVA across environments, while simple correlations between yield and others variables were determinate. The genotypes with better adaptation to drought showed higher yields, 100-seed weight and fewer days to physiological maturity. The coefficients of correlations among yield and 100-seed weight were significant and positive, while Dpm showed negative correlation. Fourteen genotypes were identified as drought tolerant: G4001, G5625, G6639, G16115, G17070, G18255, G21210 and G22247 from the NG1 sub-race; G5708, G14253, G18264 and LRK31 from the NG2 sub-race; and DRK47 and G22147 from race Peru. More than 60% of common bean (Phaseolus vulgaris L.) production worldwide is impacted by the risk of drought. In this study, the goal was to evaluate 64 bush bean genotypes from the CIAT reference collection to identify possible sources of drought resistance in the Andean gene pool. Phenotypic traits such as yield, 100-seed weight (P100) and days to physiological maturity (Dpm) were evaluated on selected accessions of this collection which was grown in an 8x8 lattice with two repetitions under three environments: intermittent drought (SI) and irrigation (R) in Palmira as well as early drought (ST) in Darién, Colombia. The genotypes included 20 from the Nueva Granada 1 (NG1) sub-race, 19 from the Nueva Granada 2 (NG2) sub-race, 10 from race Peru (P), 14 Andean control genotypes and one Mesoamerican check. The variables were analyzed through a combined ANOVA across environments, while simple correlations between yield and others variables were determinate. The genotypes with better adaptation to drought showed higher yields, 100-seed weight and fewer days to physiological maturity. The coefficients of correlations amon
El hombre con su contradicción: del desflorador avergonzado al "hombre color mujer". // The man with his contradiction: from ashamed deflowered to "woman-colored man".
Fredy Ricardo Moreno Chía.
Affectio Societatis , 2009,
Abstract: The basis of this article is the idea that “the masculine” has an internal contradiction. This is supported by some freudian references, and brought out by Jacques Lacan’s formulations, particularly in his sexuation theory and his innovations on the borromean knot. We wonder how these statements explain the internal contradiction of masculinity, and we look for a possible answer in Lacan’s assertion that there is a “woman-colored man”, whose context corresponds to his theory of the sinthome. // El presente trabajo parte de la idea según la cual “lo masculino” posee una contradicción interna. Esta idea que es sustentada en algunas referencias freudianas es puesta a la luz de las formulaciones de Jacques Lacan, en particular su teoría de la sexuación y sus desarrollos en torno al nudo borromeo. Nos preguntamos cómo estas formulaciones dan cuenta de esa contradicción interna de la masculinidad, e intentamos una posible respuesta en la afirmación de Lacan, según la cual hay “hombre color mujer” y cuyo contexto corresponde a su teoría acerca del sinthome.
La producción de masculinidad: entre la dominación y el rechazo de lo femenino
Fredy Ricardo Moreno Chía
Boletín de Antropología , 2008,
Abstract: La pregunta acerca de la constitución de la masculinidad ha sido retomada por representantes de distintas disciplinas, entre ellos antropólogos, quienes discuten el modo como ella -la masculinidad- es adjudicada y asumida a partir de complejos ritos de paso. El interés de este artículo es comparar algunas representaciones históricas y culturales que intentan responder esa pregunta, al mismo tiempo que pretende sostener la hipótesis de que la constitución de la masculinidad se basa en un rechazo de la feminidad que se reproduce en diferentes planos -social, político y psíquico-, en los que prevalece la idea de que existe una masculinidad dominante de lo femenino, pero en la que paradójicamente se encubre un deseo masculino por lo femenino.
Estimating Norms of Commutators
Terry A. Loring,Fredy Vides
Mathematics , 2013,
Abstract: We find estimates on the norms commutators of the form [f(x), y] in terms of the norm of [x, y] assuming that x and y are contractions in a C*-algebra A, with x normal and with spectrum within the domain of f. In particular we discuss [x^2, y] and [x^(1/2), y] for 0 <=, x <=, 1. For larger values of \delta = \|[x; y]\| we can rigorous calculate the best possible upper bound \|[f(x), y]\| for many f. In other cases we have conducted numerical experiments that strongly suggest that we have in many cases found the correct formula for the best upper bound.
MORBIMORTALIDAD EN URGENCIAS Y EMERGENCIAS HIPERTENSIVAS EN EL POLICLINICO BOYEROS. CIUDAD DE LA HABANA.
Cribeiro Monserrate,Luz María; Rivero Martínez,Nuria; Estévez Alvarez,Nizahel;
Revista Habanera de Ciencias M??dicas , 2009,
Abstract: a descriptive retrospective study was carried out to determine the morbimortality of the hipertensive crisis that were presented in the urgency service from the boyereos poloclinic in the period among january to june 2006. in the investigation an empirical and a theoretical system of methods were applied such as the documentary analysis and a questionaire. the obtained information was processed spss11.0. with the study the crisis were classified in hipertensive crisis in urgencies and emergencies corresponding the 43, 29 % to the emergencies and the 56,7% to the urgencies. the male sex was predominant in the emergency with a 54,4% and a 54% in the urgency. the groups of ages of 40 - 79 years were presented more events of urgencies as in hypertensive emergencies. the risk factor that highly affected were age, smoking, obesity, associated cardiopathies as in the urgency as in the hypertensive emergency. the predominant clinical forms were the dyspnea, the taquicard the precordialgia the pain toraxico, i make dizzy and the cefalea. the most frequent complication were the affections cardiovascular cerebrovascular. the evolution of the emergencies resulted the 90,4% remitted and the 9,52% passed away and in the urgency the 81.8% evolued satisfactorily and the 18.18% were remitted to the second level
MORBIMORTALIDAD EN URGENCIAS Y EMERGENCIAS HIPERTENSIVAS EN EL POLICLINICO BOYEROS. CIUDAD DE LA HABANA. MORBIDITY AND MORTALITY IN URGENCIES AND EMERGENCIES AT THE BOYEROS POLICLINIC
Luz María Cribeiro Monserrate,Nuria Rivero Martínez,Nizahel Estévez Alvarez
Revista Habanera de Ciencias M??dicas , 2009,
Abstract: Se realizó un estudio descriptivo retrospectivo transversal para determinar morbimortalidad de las crisis hipertensivas que se presentaron en el Servicio de Urgencia del Policlínico Boyeros en el período comprendido entre enero a junio de 2006. En la investigación, se utilizó un sistema de métodos teóricos y empíricos como fueron el análisis documental, aplicación de un cuestionario. La información obtenida fue procesada con el sistema estadístico SPSS versión 11.0 para Windows y se presentó en tablas y gráficos. Con el estudio, se clasificaron las crisis hipertensivas en urgencias y emergencias correspondiendo 43.29% a las emergencias y 56.70% a las urgencias. El sexo masculino fue predominante en la emergencia hipertensiva con 54.4% y 54% en la urgencia. En los grupos de edades de 40-79 a os se presentaron más eventos de urgencias y emergencias hipertensivas. Los factores de riesgo que más incidieron fueron: edad, tabaquismo, obesidad y cardiopatías, asociadas tanto en la urgencia como en la emergencia hipertensiva. Las formas clínicas predominantes fueron: disnea, taquicardia, precordialgia, dolor toráxico, mareo y cefalea. Las complicaciones más frecuentes fueron las afecciones cardiovasculares y cerebrovasculares. La evolución de las emergencias resultó 90.4% remitidos y 9.52% fallecidos, y en la urgencia 81.8% evolucionó satisfactoriamente y 18.18 fue remitido al segundo nivel. A descriptive retrospective study was carried out to determine the morbimortality of the hipertensive crisis that were presented in the urgency service from the Boyereos Poloclinic in the period among January to June 2006. In the investigation an empirical and a theoretical system of methods were applied such as the documentary analysis and a questionaire. The obtained information was processed SPSS11.0. With the study the crisis were classified in hipertensive crisis in urgencies and emergencies corresponding the 43, 29 % to the emergencies and the 56,7% to the urgencies. The male sex was predominant in the emergency with a 54,4% and a 54% in the urgency. The groups of ages of 40 - 79 years were presented more events of urgencies as in hypertensive emergencies. The risk factor that highly affected were age, smoking, obesity, associated cardiopathies as in the urgency as in the hypertensive emergency. The predominant clinical forms were the dyspnea, the taquicard the precordialgia the pain toraxico, i make dizzy and the cefalea. The most frequent complication were the affections cardiovascular cerebrovascular. The evolution of the emergencies resulted the 90,4% remitted and
Recuperación de información: reflexiones epistémicas de una ciencia en su estado embrionario
Camaraza Monserrate,Alberto;
ACIMED , 2005,
Abstract: the information retrieval appeared in 1950 as a field of independent knowledge. its philosophical and social context has a singular influence on the rising science and determines the orientation of its practical and theoretical assumptions. in this case, the bipolar society-science relation provides a sense and a guide that allows the analysis of and response to unknown epistemic questions inherent to a period of genesis of the information retrieval, as well as to its further development.
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