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Search Results: 1 - 10 of 236339 matches for " Oscar Fernando; Quintero L "
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FUENTES Y MAGNITUD DE LA VARIACIóN EN LA DIETA DE ADULTOS DE BUCARAMANGA, COLOMBIA
Herrán F,Oscar Fernando; Quintero L,Doris Cristina; Ardila L,Maria Fernanda;
Revista chilena de nutrición , 2006, DOI: 10.4067/S0717-75182006000100006
Abstract: the incorrect measurement of the diet produces an attenuation or dilution of epidemiologic measures. the variation within-person and between-person are the main determinant of this effect. to describe the variability of the diet of a colombian city, the record of the dietary intake survey of 167 adults carried out during seven days and in different seasons, during 1998-2003, was analyzed. using analysis of variance (anova), error within-person and between-person, was calculated the reason within-person/between-person, and the variation coefficients for the absolute values, transformed and adjusted by the energy using lineal regression. the reason within-person/between-person is not different for sex and smaller than 1 for all the nutritional variables, except for dietary fiber, iron and manganese. the error between-person was explained by the subjects, sex and the day of the week. with an error margin between 10% and 15%, it is viable in this population to study the diet correctly. the drop variability within-person will attenuate little the measures of absolute effect calculated in epidemic studies. however, the diet is homogeneous and characteristic of a poor country, what will hinder to find relationships between diet and illness
FUENTES Y MAGNITUD DE LA VARIACIóN EN LA DIETA DE ADULTOS DE BUCARAMANGA, COLOMBIA SOURCES AND MAGNITUDE OF THE VARIATION IN THE DIET OF ADULTS FROM BUCARAMANGA, COLOMBIA
Oscar Fernando Herrán F,Doris Cristina Quintero L,Maria Fernanda Ardila L
Revista Chilena de Nutricíon , 2006,
Abstract: La incorrecta medición de la dieta se traduce en atenuación ó dilución de las medidas epidemiológicas. La variación intra-persona y entre-personas es el principal determinante de este efecto. Para describir la variabilidad de la dieta de una ciudad colombiana, fueron analizados los registros de la ingesta dietaria de 167 adultos, realizada durante siete días y en diferentes estaciones climáticas, durante 1998-2003. Utilizando análisis de varianza (ANOVA), se cálculo el error intra-persona y entre-personas, la razón intra-persona/entre-personas, y los coeficientes de variación para los valores absolutos, transformados y ajustados por la energía utilizando regresión lineal. La razón intra-persona/entre-personas, no es diferente por sexo y menor de 1 para todas las variables nutricionales, excepto para la fibra dietaria, el hierro y el manganeso. El error entre-personas, esta explicado por los sujetos, la edad, el sexo y el día de la semana. Con un margen de error entre 10% y 15%, es viable en esta población estudiar correctamente la dieta. La baja variabilidad intra-persona atenuará poco las medidas de efecto absoluto calculadas en estudios epidemiológicos. Sin embargo, la dieta es homogénea y característica de un país pobre, lo que dificultará encontrar relaciones entre dieta y enfermedad The incorrect measurement of the diet produces an attenuation or dilution of epidemiologic measures. The variation within-person and between-person are the main determinant of this effect. To describe the variability of the diet of a Colombian city, the record of the dietary intake survey of 167 adults carried out during seven days and in different seasons, during 1998-2003, was analyzed. Using analysis of variance (ANOVA), error within-person and between-person, was calculated the reason within-person/between-person, and the variation coefficients for the absolute values, transformed and adjusted by the energy using lineal regression. The reason within-person/between-person is not different for sex and smaller than 1 for all the nutritional variables, except for dietary fiber, iron and manganese. The error between-person was explained by the subjects, sex and the day of the week. With an error margin between 10% and 15%, it is viable in this population to study the diet correctly. The drop variability within-person will attenuate little the measures of absolute effect calculated in epidemic studies. However, the diet is homogeneous and characteristic of a poor country, what will hinder to find relationships between diet and illness
INGESTA USUAL DE VITAMINAS Y MINERALES EN BUCARAMANGA, COLOMBIA
Herrán F,Oscar Fernando; Prada G,Gloria Esperanza; Quintero L,Doris Cristina;
Revista chilena de nutrición , 2007, DOI: 10.4067/S0717-75182007000100004
Abstract: the usual intake represents the dietary intake of medium and long term; its estimate being preferable to that of the current intake. the usual intake allows comparison with values of dietary reference intake (dri's) to establish the deficiency or excess. one hundred and sixty seven subjects between 20 and 60 years old, selected at random, completed a record of intake of foods during seven serial days. the inadequate intake was evident for folic acid (30% in men and 50% in women, p < 0.001), zinc (16% for men and 28% for women, p < 0.001) and magnesium (47% for men and 48% for women, p < 0.001). women had a higher risk of inadequacy than men in consumption of vitamins. except for folic acid, all studied vitamins were consumed in smaller quantities in the socioeconomic level one, showing a lineal trend (p < 0.001). deficit in the intakes existed for some vitamins and minerals which may favour the development of chronic diseases and cardiovascular events. it is necessary to continue developing charts of composition of foods that allow a translation of the diet to nutrition, in a way more appropriate and more coherent with the type of epidemic profile and the conditions of dietary intake
VALIDEZ FACTORIAL, CONSISTENCIA INTERNA Y REPRODUCIBILIDAD DE LA ESCALA DE SEGURIDAD ALIMENTARIA EN HOGARES DE BUCARAMANGA, COLOMBIA
Herrán F,Oscar Fernando; Quintero L,Doris Cristina; Prada,Gloria Esperanza;
Revista chilena de nutrición , 2009, DOI: 10.4067/S0717-75182009000200009
Abstract: the objective of this study was to assess in households of bucaramanga, the factorial validity, internal consistency and reproducibility of the scale of perception of food security (epsa) applied in the survey of the nutritional situation in colombia (ensin-2005). during the first semester of 2007, a questionnaire with so-cioeconomic variables was applied in 108 household and, with interval of one month, epsa was applied twice. factor analysis and goodness of fit of the final model and the theoretical one were evaluated. we established the reproducibility of the epsa and its internal consistency. we ratified a dimension with two components; ilack of money to buy foodsi and iexperience of hunger for lack offoods.i this model is similar to the one applied in the ensin-2005, explains 76% of the variance and its adjustment was barely acceptable: rmsea 0.27, nfi 0.63, gfi 0.58. the reproducibility was almost perfect (r= 0.98, ci; 0.98 - 0.99) and had internal validity, alpha of cronbach 0.92.
INGESTA USUAL DE VITAMINAS Y MINERALES EN BUCARAMANGA, COLOMBIA USUAL INTAKE OF VITAMINS AND MINERALS IN BUCARAMANGA, COLOMBIA
Oscar Fernando Herrán F,Gloria Esperanza Prada G,Doris Cristina Quintero L
Revista Chilena de Nutricíon , 2007,
Abstract: El consumo usual representa la ingesta dietética de mediano y largo plazo, su estimación es preferible a la del consumo actual. El consumo usual permite con base a los valores de referencia de ingesta dietaria (DRI`s) establecer las prevalencias de déficit o exceso. Para tal fin, encuestamos un grupo de 167 personas entre 20 y 60 a os, seleccionadas al azar, quienes completaron un registro de consumo de alimentos con medidas de peso y volumen durante siete días consecutivos. La ingesta inadecuada es evidente para el ácido fólico; 30% en hombres y 50% en mujeres (p<0.001), el cinc; 16% para hombres y 28% para mujeres (p<0,001) y el magnesio; 47% para hombres y 48% para mujeres (p<0,001). Las mujeres tienen mayor riesgo de inadecuación en el consumo de vitaminas. Con excepción del ácido fólico todas las vitaminas estudiadas son consumidas en menor cantidad en el nivel socioeconómico uno; existiendo una tendencia lineal (p<0,001). Existen consumos deficitarios para algunas vitaminas y minerales que favorecen el desarrollo de eventos crónicos y cardiovasculares. Es necesario seguir desarrollando tablas de composición de alimentos que permitan una traducción de la dieta a nutrientes, más adecuada y coherente con el tipo de perfil epidemiológico y las condiciones de consumo dietario The usual intake represents the dietary intake of medium and long term; its estimate being preferable to that of the current intake. The usual intake allows comparison with values of dietary reference intake (DRI's) to establish the deficiency or excess. One hundred and sixty seven subjects between 20 and 60 years old, selected at random, completed a record of intake of foods during seven serial days. The inadequate intake was evident for folic acid (30% in men and 50% in women, p < 0.001), zinc (16% for men and 28% for women, p < 0.001) and magnesium (47% for men and 48% for women, p < 0.001). Women had a higher risk of inadequacy than men in consumption of vitamins. Except for folic acid, all studied vitamins were consumed in smaller quantities in the socioeconomic level one, showing a lineal trend (p < 0.001). Deficit in the intakes existed for some vitamins and minerals which may favour the development of chronic diseases and cardiovascular events. It is necessary to continue developing charts of composition of foods that allow a translation of the diet to nutrition, in a way more appropriate and more coherent with the type of epidemic profile and the conditions of dietary intake
VALIDEZ FACTORIAL, CONSISTENCIA INTERNA Y REPRODUCIBILIDAD DE LA ESCALA DE SEGURIDAD ALIMENTARIA EN HOGARES DE BUCARAMANGA, COLOMBIA FACTORIAL VALIDITY, INTERNAL CONSISTENCY AND REPRODUCIBILITY OF THE SCALE OF FOOD SECURITY IN HOUSEHOLD OF BUCARAMANGA, COLOMBIA
Oscar Fernando Herrán F,Doris Cristina Quintero L,Gloria Esperanza Prada
Revista Chilena de Nutricíon , 2009,
Abstract: El objetivo fue establecer en hogares de Bucara-manga, la validez factorial, la consistencia interna y la reproducibilidad de la escala de percepción de seguridad alimentaria (EPSA), aplicada en la Encuesta de la Situación Nutritional en Colombia (ENSIN-2005). Durante el primer semestre de 2 007, en 108 hogares se aplicó un formato con variables socioeconómicas, y con intervalo de un mes, dos veces la EPSA. Se realizó análisis de factores y se evaluó la bondad de ajuste del modelo final y el teórico. Se estableció la reproducibilidad de la EPSA y su consistencia interna. Se ratifico una dimensión con dos componentes; "falta de dinero para comprar alimentos" y "experiencia de hambre por falta de alimentos". Este modelo es igual al aplicado en la ENSIN-2005, explica 76% de la varianza y su ajuste es apenas aceptable; RMSEA: 0,27, NFI: 0,63, GFI: 0,58. La reproducibilidad es casi perfecta, r= 0,98 (IC; 0,98 a 0,99) y tiene validez interna, Alfa de Cronbach 0,92. A pesar de las propiedades psicométricas y ahora de su reproducibilidad, aún no puede considerarse que el conocimiento sobre la utilidad y limitaciones de la EPSA este concluido. The objective of this study was to assess in households of Bucaramanga, the factorial validity, internal consistency and reproducibility of the scale of perception of food security (EPSA) applied in the Survey of the Nutritional Situation in Colombia (ENSIN-2005). During the first semester of 2007, a questionnaire with so-cioeconomic variables was applied in 108 household and, with interval of one month, EPSA was applied twice. Factor analysis and goodness of fit of the final model and the theoretical one were evaluated. We established the reproducibility of the EPSA and its internal consistency. We ratified a dimension with two components; ilack of money to buy foodsi and iexperience of hunger for lack offoods.i This model is similar to the one applied in the ENSIN-2005, explains 76% of the variance and its adjustment was barely acceptable: RMSEA 0.27, NFI 0.63, GFI 0.58. The reproducibility was almost perfect (r= 0.98, CI; 0.98 - 0.99) and had internal validity, alpha of Cronbach 0.92.
SEGURIDAD ALIMENTARIA EN COLOMBIA Y MODELO RASCH FOOD SECURITY IN COLOMBIA AND RASCH MODEL
Martha Inés Camargo G,Doris Cristina Quintero L,Oscar Fernando Herrán F
Revista Chilena de Nutricíon , 2012,
Abstract: Este estudio sometió dos escalas utilizadas para determinar la seguridad alimentaria en las encuestas nacionales de situación nutricional de Colombia (ENSIN) al modelo Rasch para conocer su desempeno ante la evidencia contradictoria de su utilidad. En la práctica la EPSA mide la inseguridad alimentaria con base en un solo ítem, el p1, el cual por su baja dificultad -8,46 logits, desviación estándar (DS) de 1,83-, resulta inapropiado para medir los hogares estudiados. Con base en los estadísticos calculados cinco de los doce ítems presentan sobreajuste y tres de los doce incluido el primero, degradación de la medición. Al igual que con la EPSA p1 define el resultado en muy buena medida y la prueba resulta inapropiada para los hogares estudiados. Con base en los estadísticos calculados al menos cuatro de los quince ítems presentan sobreajuste y cuatro de los quince incluido el primero degradación de la medición. La medición utilizando herramientas que no son adecuadas pero si atractivas, puede ser un nuevo y mayúsculo problema que se sume a otras condiciones asociadas a la inseguridad alimentaria de los hogares. This study subjected two scales used to determine food security in national nutritional status surveys in Colombia (ENSIN) to the Rasch model to assess their performance on the contradictory evidence of its usefulness. In practical terms, the EPSA measures food insecurity based on a single item, p1, which due to its low difficulty (8.46 logits, standard deviation of1.83) is inappropriate to measure the surveyed households. Based on statistical calculation five of the twelve items presented overfitting and three of the twelve (including the first) presented measurement degradation. Like the EPSA, p1 defines the result to a large extent showing that the test is inadequate for the surveyed households. Based on statistics at leastfour of the fifteen items showed over-adjustment andfour of the fifteen, including the first, showed measurement degradation. Measurements using tools that are not appropriate, but attractive, can be a new and serious problem that adds to other conditions associated with household food insecurity.
Bioinformatic identification of cassava miRNAs differentially expressed in response to infection by Xanthomonas axonopodis pv. manihotis
álvaro L Pérez-Quintero, Andrés Quintero, Oscar Urrego, Pablo Vanegas, Camilo López
BMC Plant Biology , 2012, DOI: 10.1186/1471-2229-12-29
Abstract: This work addresses the role of miRNAs in the Manihot esculenta (cassava)-Xanthomonas axonopodis pv. manihotis (Xam) interaction. Next-generation sequencing was used for analyzing small RNA libraries from cassava tissue infected and non-infected with Xam. A full repertoire of cassava miRNAs was characterized, which included 56 conserved families and 12 novel cassava-specific families. Endogenous targets were predicted in the cassava genome for many miRNA families. Some miRNA families' expression was increased in response to bacterial infection, including miRNAs known to mediate defense by targeting auxin-responding factors as well as some cassava-specific miRNAs. Some bacteria-repressed miRNAs included families involved in copper regulation as well as families targeting disease resistance genes. Putative transcription factor binding sites (TFBS) were identified in the MIRNA genes promoter region and compared to promoter regions in miRNA target genes and protein coding genes, revealing differences between MIRNA gene transcriptional regulation and other genes.Taken together these results suggest that miRNAs in cassava play a role in defense against Xam, and that the mechanism is similar to what's known in Arabidopsis and involves some of the same families.Very succinctly plant-bacteria interactions can be thought as governed at molecular level mainly by three types of proteins: plant PRRs (pathogen recognition receptors), bacterial effectors and plant resistance proteins. PRRs are proteins recognizing highly conserved structures and molecules in microorganisms named MAMP (microbial-associated molecular patterns) and mediate MAMP-triggered immunity (MTI), which is efficient against non-adapted pathogens. Pathogens have developed effector proteins to suppress MTI. In turn, plants can counteract the action of effector by the specific recognition of effectors mediated by resistance proteins which will trigger a strong defence response known as ETI (effector-triggered immu
ALCOHOL CONSUMIDO Y VARIABLES ASOCIADAS EN BUCARAMANGA, COLOMBIA
Herrán F,Oscar Fernando; Ardila L,María Fernanda;
Revista chilena de nutrición , 2009, DOI: 10.4067/S0717-75182009000300004
Abstract: the objective of this work was to estimate the quantity of consumed alcohol (g) by adults of bucaramanga, and to describe the associated variables like problem drinking, alcoholism and characteristics of the consumer. during 2006 a total 1,119 subjects answered five questionnaires, including a food frequency questionnaire validated in this population. men consumed 69.4 g weekly of alcohol (ci; 64.1 to 75.2) and women consumed 34.1 g (ic; 30.9 to 55.7),p=0.000. fifty five % of the population exceeded the recommended limit of weekly consumption (70.4% of the men and 40.9% of the women, p=0.000). the quantity of energy associated to the intake of alcohol was 781 kilocalories (ci; 696 at 894), of these 20% (159 kilocalories, ci; 138 to 179) come from intake associated with soft drinks of the cola type. six variables explain 33% of the quantity of consumed alcohol; sex, age, socioeconomic level, consumption frequency, taste and problem drinking.
ALCOHOL CONSUMIDO Y VARIABLES ASOCIADAS EN BUCARAMANGA, COLOMBIA ALCOHOL CONSUMPTION AND ASSOCIATED VARIABLES IN BUCARAMANGA, COLOMBIA
Oscar Fernando Herrán F,María Fernanda Ardila L
Revista Chilena de Nutricíon , 2009,
Abstract: El objetivo fue estimar la cantidad de alcohol consumida (g) por adultos de Bucaramanga, y describir el consumo por las variables derivadas del mismo; consumo problemático, riesgo de alcoholismo y tipología del consumidor. Durante 2006 un total 1.119 sujetos respondieron cinco encuestas, entre ellas, un cuestionario de frecuencia de consumo validado en esta población. Los hombres consumen en promedio 69,4 g semanales de alcohol (IC; 64,1 a 75,2), las mujeres 34,1 g (IC; 30,9 a 55,7), p=0,000. El 55,4% de la población excede el límite de consumo semanal en unidades internacionales; 70,4% los hombres y 40,9% las mujeres respectivamente, p=0,000. La cantidad de energía asociada a la ingesta de alcohol fue de 781 kilocalorías (IC; 696 a 894), de estas el 20% (159 kilocalorías, IC; 138 a 179) son derivadas de bebidas acompa antes, como las tipo cola. Seis variables explican en 33% la cantidad de alcohol consumido; el sexo, la edad, el nivel socioeconómico, la frecuencia de consumo, el gusto por las bebidas y el consumo problemático. The objective of this work was to estimate the quantity of consumed alcohol (g) by adults of Bucaramanga, and to describe the associated variables like problem drinking, alcoholism and characteristics of the consumer. During 2006 a total 1,119 subjects answered five questionnaires, including a food frequency questionnaire validated in this population. Men consumed 69.4 g weekly of alcohol (CI; 64.1 to 75.2) and women consumed 34.1 g (IC; 30.9 to 55.7),p=0.000. Fifty five % of the population exceeded the recommended limit of weekly consumption (70.4% of the men and 40.9% of the women, p=0.000). The quantity of energy associated to the intake of alcohol was 781 kilocalories (CI; 696 at 894), of these 20% (159 kilocalories, CI; 138 to 179) come from intake associated with soft drinks of the cola type. Six variables explain 33% of the quantity of consumed alcohol; sex, age, socioeconomic level, consumption frequency, taste and problem drinking.
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