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Search Results: 1 - 10 of 9008 matches for " Brenda Rodriguez Aguilar "
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Desarrollo y validación de una escala para medir imagen corporal en mujeres jóvenes
Rodriguez Aguilar, Brenda;van Barneveld, Hans Oudhof;Gonzalez-Arratia, Norma Ivonne;Unikel-Santoncini, Claudia;
Salud mental , 2010,
Abstract: introduction body image is a concept which involves the feelings, attitudes and perceptions people have about their own body, and is influenced by the adoption of social standards. body image studies are used in the field of eating disorders research in order to analyze the degree of body dissatisfaction. however, most of the scales proposed to assess body image have been developed in anglo-saxon and european countries. therefore, research on this topic in other socio-cultural contexts requires the standardization and validation of culturally adapted instruments. the aim of the present study was to determine and discuss the reliability and validity of a mexican scale which measures body image. additionally, comparisons regarding body dissatisfaction, internalization of the aesthetic ideal of thinness, social influence, age and body mass index (bmi) were made between groups of female college students with and without disordered eating. materials and methods the sample of this study comprised 508 female college students from the universidad autónoma del estado de méxico, selected by means of a probabilistic stratification procedure taking into account the proportion of female students enrolled in each academic area of the university. their average age was 20.1 years; their mean weight was 57.2 kg with an average height of 1.58 m, whereas the average bmi was 22.8. based on the theoretical assumptions, three indicators were defined to structure the body image scale: body dissatisfaction, social influence and the internalization of the aesthetic ideal of thinness, measured by a five-point likert-type scale ranging from never (1) to always (5). a pilot study was carried out in a population of 100 college women; as a result, some adjustments were made in the instructions and in the order of the items. additionally, a content validation was conducted through the judgments of four professional experts in the clinical mental health area. the scale contains thirty-three items;
Desarrollo y validación de una escala para medir imagen corporal en mujeres jóvenes
Brenda Rodriguez Aguilar,Hans Oudhof van Barneveld,Norma Ivonne Gonzalez-Arratia,Claudia Unikel-Santoncini
Salud mental , 2010,
Abstract: Introducción La imagen corporal es la representación mental del cuerpo que cada individuo construye en términos de sentimiento y actitudes hacia el propio cuerpo. El propósito de este estudio es: desarrollar, validar y encontrar el grado de confiabilidad de una escala para medir la imagen corporal en dos grupos de mujeres estudiantes de nivel universitario, uno con conductas alimentarias de riesgo (CAR) y otro sin ellas, así como establecer comparaciones respecto a la edad y al índice de masa corporal (IMC).
La usabilidad de TIC en la práctica educativa
Brenda Luz Colorado-Aguilar,Rubén Edel-Navarro
RED : Revista de Educación a Distancia , 2012,
Abstract: Se realiza un análisis acerca de la usabilidad de las Tecnologías de la Información y Comunicación (TIC) desde la perspectiva de la práctica educativa, focalizándolo en la adquisición de nuevos significados al establecer la interacción entre el binomio recursos tecnológicos-docencia, y la forma como se construye el conocimiento a partir de dicha experiencia. La usabilidad de TIC, o experiencia del usuario, para la formación inicial docente representa una condición de aprendizaje mediado por los recursos digitales, partiendo de la premisa que contempla que la formación por competencias permitirá desarrollar las habilidades, actitudes y valores para aplicar las TIC en un contexto específico. Por otra parte, el enfoque por competencias asociado con el constructivismo sociocultural brinda la pauta para integrar el saber, saber hacer, saber estar y saber ser, que permiten al docente identificar los recursos que podría incorporar de manera deliberada en el proceso de ense anza-aprendizaje, así como la accesibilidad que pueda alcanzar con su experiencia de uso. En este proceso intervienen de manera directa aquellas actitudes que manifieste el docente en su formación e interés por mejorar su práctica, considerando que el trabajo del profesional dedicado a la educación implica una constante formación y actualización para visualizar la anhelada innovación en la didáctica.
Speed evolution of fast CME/shocks with SOHO/LASCO, WIND/WAVES, IPS and in-situ WIND data: analysis of kilometric type-II emissions
A. Gonzalez-Esparza ,E. Aguilar-Rodriguez
Annales Geophysicae (ANGEO) , 2009,
Abstract: Fast CME/shocks propagating in the interplanetary medium can generate kilometric Type II (km-TII) radio emissions at the local plasma frequency and/or its harmonic, so these radio emissions provide a means of remotely tracking CME/shocks. We apply a new analysis technique, using the frequency drift of km-TII spectrum obtained by the Thermal Noise Receiver (TNR) of the WIND/WAVES experiment, to infer, at some adequate intervals, the propagation speed of six CME/shocks. We combine these results with previously reported speeds from coronagraph white light and interplanetary scintillation observations, and in-situ measurements, to study the temporal speed evolution of the six events. The speed values obtained by the km-TII analysis are in a reasonable agreement with the speed measurements obtained by other techniques at different heliocentric distance ranges. The combination of all the speed measurements show a gradual deceleration of the CME/shocks as they propagate to 1 AU. This new technique can be useful in studying the evolution of fast CME/shocks when adequate intervals of km-TII emissions are available.
Conocimientos y prácticas sobre Hylesia metabus (Cramer, 1775) y lepidopterismo en Capure, estado Delta Amacuro, Venezuela (Julio-Agosto 2005)
García Z,Brenda; Alvarado P,Gregorio; López de Aguilar,Reina;
Boletín de Malariología y Salud Ambiental , 2009,
Abstract: the hylesia metabus butterfly has scales and urticant hairs that cause dermatitis and allergic reactions known as lepidopterism, and on occasions it represents a severe social and public health problem. since september 2004, capure has been affected by cyclical invading of h. metabus, and to implement activities for prevention and control, an understanding about socio-cultural context of the population is required. this descriptive, exploratory and camp study tried to characterize knowledges and practices about h. metabus and lepidopterism in capure, by the application of surveys to forty five (45) persons older than ten years old (41 creole people and 4 indigenous warao people) and direct observation. about 88.8% (n=40) of those polled, described the butterfly?s biological cycle, with adequate knowledge about its behavior; 64.4% (n=29) named h. metabus as "furry butterfly", and the indigenous warao identified it as "warowaro tijia" (butterfly that bites); 85% (n=38), indicated that the community can participate in control activities and described alternatives of participation. the prevelance of lepidopterism was 69.4% and those polled identified their symptoms as allergic reactions and dermatitis. the practices realized in lepidopterism were 57.7% (n=26) domestic treatments, 20.0% mixed treatments and 11.1% went to the hospital. the domestic treatments were topical uses, 44.7% (n=17) of vinegar, 15.7% (η=6) roll-on deodorant and 10.5% (n=4) gasoil. the capure community has adequate knowledge about h. metabus disease and knows how to apply preventive control for lepidopterism. it is necessary to articulate a permanent surveillance and control program of lepidopterism and the hylesia sp. butterfly with local emphasis and community participation.
Transición parasitaria a Blastocystis hominis en ni os de la zona centro del estado de Guerrero, México PARASITIC TRANSITION TO Blastocystis hominis IN CHILDREN FROM CENTER ZONE OF GUERRERO STATE, MEXICO
ELVIA RODRíGUEZ,BRENDA MATEOS,JULIO C GONZáLEZ,YURI M AGUILAR
Parasitología latinoamericana , 2008,
Abstract: Blastocystis hominis es un organismo emergente cuya prevalencia se ha incrementado en los últimos a os. La frecuencia en México va de 4,0% a 62%, sin reportes previos en el estado de Guerrero. La población estudiada fueron tres localidades del estado de Guerrero: Chilpancingo, Petaquilla y Tixtla en un total de 1.138 ni os preescolares y escolares, de ambos sexos. Mediante tres técnicas coproparasitóscopicas (CPS): examen directo, concentración por flotación de Faust y cultivo de Barret, se detectaron un total de 38% de ni os parasitados y B. hominis ocupó el primer lugar con el 61% de los CPS positivos. El 90% de los casos fueron parasitosis única. El 58% de los ni os aparentemente sanos y con B. hominis declararon tener algún síntoma gastrointestinal. La asociación de B. hominis con dolor abdominal y beber agua de la llave tuvo diferencia significativa. Proponemos una transición parasitaria a B. hominis como principal parásito del hombre, como resultado de las medidas de control para las parasitosis intestinales. Blastocystis hominis is an enteric emergen organism found in human it's prevalence has been increasing in the lasts years. The frequency in Mexico is from 4.0% to 62%, without reports in the Guerrero state. The aim of this study was to inform the parasitic transition to B. hominis in the Central Zone of Guerrero state. The population in this study were three communities of Guerrero state: Chilpancingo, Petaquilla and Tixtla in a total of 1,138 preschools and schools children of both sexs. Three parasitological tests were used for detection of the parasite in stool specimens: micrscopy of direct smears, concentration and flotation technique and serum-solution saline culture. Global prevalence of parasites was of 38% and B. hominis was the principal parasite with 61% on the positive tests. The 90% were only B. hominis and 10% with others parasites. A total of 58% of the children healthy with B. hominis declarated have gastrointestinal symptoms. The association ofB. hominis with abdominal pain and drinking taste water had significant difference. We propuse a parasitic transition to B. hominis as principal human parasite, this can be the result of man-made intervention in the intestinal parasitosis control.
Stellar Multiplicity and Debris Disks: An Unbiased Sample
David R. Rodriguez,Gaspard Duchene,Henry Tom,Grant Kennedy,Brenda Matthews,Jane Greaves,Harold Butner
Physics , 2015, DOI: 10.1093/mnras/stv483
Abstract: Circumstellar dust disks have been observed around many nearby stars. However, many stars are part of binary or multiple stellar systems. A natural question arises regarding the presence and properties of such disks in systems with more than one star. To address this, we consider a sample of 449 systems (spectral types A-M) observed with the Herschel Space Observatory as part of the DEBRIS program. We have examined the stellar multiplicity of this sample by gathering information from the literature and performing an adaptive optics imaging survey at Lick Observatory. Five new companions were revealed with our program. In total, we identify 188 (42%) binary or multiple star systems. The multiplicity of the sample is examined with regards to the detection of circumstellar disks for stars of spectral types AFGK. In general, disks are less commonly detected around binaries than single stars, though the disk frequency is comparable among A stars regardless of multiplicity. However, this sample reveals the period distribution of disk-bearing binaries is consistent with that of non-disk binaries and with comparison field samples. We find that the properties of disks in binary systems are not statistically different from those around single stars. Although the frequency of disk-bearing FGK binaries may be lower than in single star systems, the processes behind disk formation and the characteristics of these disks are comparable among both populations.
Antioxidant Enrichment and Antimicrobial Protection of Fresh-Cut Mango Applying Bioactive Extracts from Their Seeds By-Products  [PDF]
Violeta Vega-Vega, Brenda A. Silva-Espinoza, Manuel Reynaldo Cruz-Valenzuela, Ariadna Thalía Bernal-Mercado, Gustavo A. González-Aguilar, Irasema Vargas-Arispuro, Consuelo G. Corrales-Maldonado, J. Fernando Ayala-Zavala
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.48A024
Abstract: The effect of the application of ethanolic extract of “Haden” mango seeds to increase the antioxidant and antimicrobial capacity of fresh-cut mango flesh was evaluated. Phenolic HPLC analysis revealed that gallic acid was the major identified compound in the ethanolic extract (586.68 mg/g). Fresh-cut mango was treated for immersion within the ethanolic extract, packed and stored at 5 during 15 days. The content of phenolic compounds, antioxidant capacity and microbial growth of the treated mango were evaluated during the storage. Compared with the controls the treated fruit presented the highest content of the total phenolic (7.4 times), flavonoids (3.1 times), and antioxidant capacity DPPH·, TEAC and ORAC (2.9, 2.3 and 2.8 times, respectively), and showed a microbial reduction of 80% of mesophilic plate count and 97% of total molds. This study demonstrates the potential of phenolic compounds derived from mango seed as antimicrobials and antioxidants.
Effect of Glucose Concentrations on the Growth and Metabolism of Brettanomyces bruxellensis under Aerobic Conditions  [PDF]
Ortiz-Mu?iz Benigno, Corro-Herrera Victor, Gomez-Rodriguez Javier, Domínguez-González José Manuel, Aguilar-Uscanga María Guadalupe
Advances in Microbiology (AiM) , 2013, DOI: 10.4236/aim.2013.33034
Abstract:

Acetic acid can be directly produced from glucose in one-step fermentation by using yeasts of the genus Brettanomyces bruxellensis, hence increasing the industrial application to manufacture products with simplified bioprocesses. Thereby, this work evaluates the influence of initial glucose concentration on the growth and acetic acid production by B. bruxellensis. The results obtained confirmed the presence of Crabtree effect on B. bruxellensis under low glucose concentrations. The maximum acetic acid concentration reached was 15.4 g·L-1 starting with 100 g·L-1 leading to a product yield of 0.154 g·g-1 and a specific acetic acid production rate of 0.05 g·g-1·h-1. The results also indicate that after reaching the acetic acid critic threshold of 4 g·L-1 the metabolism can induce the growth second phase even residual glucose was present on the culture media at high starting glucose concentrations. Additionally, it was observed a lineal relationship between cell viability and acetic acid production.

Association of Organophosphate Pesticide Exposure and Paraoxonase with Birth Outcome in Mexican-American Women
Kim G. Harley, Karen Huen, Raul Aguilar Schall, Nina T. Holland, Asa Bradman, Dana Boyd Barr, Brenda Eskenazi
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0023923
Abstract: Background Epidemiologic studies suggest that maternal organophosphorus (OP) pesticide exposure is associated with poorer fetal growth, but findings are inconsistent. We explored whether paraoxonase (PON1), a key enzyme involved in detoxification of OPs, could be an effect modifier in this association. Methods The study population included 470 pregnant women enrolled in the CHAMACOS Study, a longitudinal cohort study of mothers and children living in an agricultural region of California. We analyzed urine samples collected from mothers twice during pregnancy for dialkyl phosphate (DAP) metabolites of OP pesticides. We analyzed maternal and fetal (cord) blood samples for PON1 genotype (PON1192 and PON1?108) and enzyme activity (paraoxonase and arylesterase). Infant birth weight, head circumference, and gestational age were obtained from medical records. Results Infants' PON1 genotype and activity were associated with birth outcome, but mothers' were not. Infants with the susceptible PON1?108TT genotype had shorter gestational age (β = ?0.5 weeks, 95% Confidence Interval (CI): ?0.9, 0.0) and smaller head circumference (β = ?0.4 cm, 95% CI: ?0.7, 0.0) than those with the PON1?108CC genotype. Infants' arylesterase and paraoxonase activity were positively associated with gestational age. There was some evidence of effect modification with DAPs: maternal DAP concentrations were associated with shorter gestational age only among infants of the susceptible PON1?108TT genotype (p-valueinteraction = 0.09). However, maternal DAP concentrations were associated with larger birth weight (p-valueinteraction = 0.06) and head circumference (p-valueinteraction<0.01) in infants with non-susceptible genotypes. Conclusions Infants whose PON1 genotype and enzyme activity levels suggested that they might be more susceptible to the effects of OP pesticide exposure had decreased fetal growth and length of gestation. PON1 may be another factor contributing to preterm or low birth weight birth.
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