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Search Results: 1 - 10 of 5634 matches for " Barbara Moguel "
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Sociedad, familia y medios de comunicación de masas: jalones para su revisión
Carmen Moguel
Historia Actual Online , 2007,
Abstract: El educador actual debe ser testigo y adaptarse a los nuevos cambios sociales. El presente artículo pretende analizar los criterios con que se introducen los medios de comunicación de masas en la sociedad actual, donde la familia juega un papel importante. La sociedad de la información está generando un nuevo modelo y nosotros debemos estudiar los cambios acaecidos, no basta con ser testigos, hay que analizarlos. El texto pretende mostrar algunas reflexiones sobre la sociedad, la familia y los medios de comunicación de masa en el mundo actual.
Two Distinct Triatoma dimidiata (Latreille, 1811) Taxa Are Found in Sympatry in Guatemala and Mexico
Patricia L. Dorn equal contributor ,Claudia Calderon equal contributor,Sergio Melgar equal contributor,Barbara Moguel,Elizabeth Solorzano,Eric Dumonteil,Antonieta Rodas,Nick de la Rua,Roberto Garnica,Carlota Monroy
PLOS Neglected Tropical Diseases , 2009, DOI: 10.1371/journal.pntd.0000393
Abstract: Approximately 10 million people are infected with Trypanosoma cruzi, the causative agent of Chagas disease, which remains the most serious parasitic disease in the Americas. Most people are infected via triatomine vectors. Transmission has been largely halted in South America in areas with predominantly domestic vectors. However, one of the main Chagas vectors in Mesoamerica, Triatoma dimidiata, poses special challenges to control due to its diversity across its large geographic range (from Mexico into northern South America), and peridomestic and sylvatic populations that repopulate houses following pesticide treatment. Recent evidence suggests T. dimidiata may be a complex of species, perhaps including cryptic species; taxonomic ambiguity which confounds control. The nuclear sequence of the internal transcribed spacer 2 (ITS2) of the ribosomal DNA and the mitochondrial cytochrome b (mt cyt b) gene were used to analyze the taxonomy of T. dimidiata from southern Mexico throughout Central America. ITS2 sequence divides T. dimidiata into four taxa. The first three are found mostly localized to specific geographic regions with some overlap: (1) southern Mexico and Guatemala (Group 2); (2) Guatemala, Honduras, El Salvador, Nicaragua, and Costa Rica (Group 1A); (3) and Panama (Group 1B). We extend ITS2 Group 1A south into Costa Rica, Group 2 into southern Guatemala and show the first information on isolates in Belize, identifying Groups 2 and 3 in that country. The fourth group (Group 3), a potential cryptic species, is dispersed across parts of Mexico, Guatemala, and Belize. We show it exists in sympatry with other groups in Peten, Guatemala, and Yucatan, Mexico. Mitochondrial cyt b data supports this putative cryptic species in sympatry with others. However, unlike the clear distinction of the remaining groups by ITS2, the remaining groups are not separated by mt cyt b. This work contributes to an understanding of the taxonomy and population subdivision of T. dimidiata, essential for designing effective control strategies.
Efectos de la correspondencia entre educación y empleo de los jóvenes en el mercado de trabajo mexicano
López Moguel, María del Rosario;
Revista mexicana de investigación educativa , 2009,
Abstract: this paper analyzes the effects of the relation between young people's education and employment in the labor market. we started by assuming that a difference exists between individuals who are working in the occupation for which they were educated, and individuals who were not educated for their work. the hypothesis is that a high degree of correspondence between education and occupation implies better performance and earnings. the methodology was based on empirical ex-post observation at a given moment in time. to measure the effects of the relation between education and employment and to observe young people's performance in the labor market, use was made of gini indexes and a wage model.
Estrategias sociales: de la sobrevivencia a la contingencia
Reyna Moguel Viveros,Sandra Urania Moreno Andrade
Papeles de población , 2005,
Abstract: Este artículo emprende una discusión en torno al concepto de "estrategias sociales", apuntando las inconsistencias teóricas y metodológicas de éste, así como la forma en que puede ser abordado desde las críticas sociológicas a los supuestos clásicos weberianos de la acción social. Se observa que el concepto ha tenido cambios que lo llevan a apuntalar una perspectiva moderna neoliberal de la sociedad donde los individuos pobres pueden organizarse frente a las restricciones que les impone la estructura social, participando sólo como sociedad civil anónima (unidad doméstica) a través de dise ar un cúmulo de estrategias sociales que les permite "sobrevivir" o "reproducirse". Esta perspectiva puede ser revertida con la noción de "contingencias provocadas dentro de los ámbitos globalizados del Estado, del mercado y del deterioro ambiental".
Parasitología básica. Helmintología
Bárbara Moguel-Rodríguez
Biomédica , 2011,
Abstract:
Polyphenols, Ascorbic Acid and Carotenoids Contents and Antioxidant Properties of Habanero Pepper (Capsicum chinense) Fruit  [PDF]
Maira Rubi Segura Campos, Karen Ramírez Gómez, Yolanda Moguel Ordo?ez, David Betancur Ancona
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.48A006
Abstract:

Their high bioactive compounds content and importance as dietary antioxidants has increased interest in Capsicum fruit. The fruit of seven Capsicum chinense Jacq. var. habanero genotypes grown in Yucatan, Mexico, were analyzed to quantify their phenolic compounds, carotenoids and ascorbic acid contents, and to measure their free radical scavenging (ABTS assay) and antioxidant activities (β-carotene/linoleic acid assay). Phenolics (20.54 to 20.75 mg/100 g sample), carotenoids (1.00 to 1.26 mg/100 g sample) and ascorbic acid contents (187.24 to 281.73 mg/100 g sample) varied between genotypes. Trolox equivalent antioxidant capacity (TEAC) ranged from 1.55 to 3.23 mM/mg sample. During the 120-min decolorization trial, antioxidant capacity decreased over time in the studied genotypes. Values ranged from 36%to 57% β-carotene bleaching during the first 30 minutes. Fruit from all seven studied genotypes are good antioxidant sources and hold promise as natural ingredients in functional foods.

Rapid HPLC Method for Determination of Rebaudioside D in Leaves of Stevia rebaudiana Bertoni Grown in the Southeast of México  [PDF]
Irma Aranda-González, Yolanda Moguel-Ordo?ez, David Betancur-Ancona
American Journal of Analytical Chemistry (AJAC) , 2014, DOI: 10.4236/ajac.2014.513090
Abstract: Stevia leaves contain glycosides on which biological activity and sweetening capacity has been reported. Besides the main glycosides—stevioside and rebaudioside A—there are minor glycosides that may contribute to the activity and thus it is important to quantify them. Rebaudioside D is one of the minor glycoside present in S. rebaudiana leaves and there are no reports of a validated method to quantify it. Therefore a simple and sensitive high performance liquid chromatography (HPLC) method was validated for the determination of rebaudioside D in leaves of Stevia rebaudiana B. grown in the southeast of México. HPLC method was performed using a C18 column (250 mm × 4.6 mm, 5 μm) and UV detector set at 210 nm. The mobile phase consisted of 32:68 (v/v) mixture of acetonitrile and sodium phosphate buffer (10 mmol/L, pH 2.6), set to a flow rate of 1.0 ml/min. The calculated parameters were: sensitivity, linearity, limit of detection (LOD), limit of quantification (LOQ), accuracy and precision. The retention time of rebaudioside D was found to be 3.47 min ± 0.04 (S.D.). The calibration curves were linear over the working range (25 - 150 μg/ml), with correlation coefficient ≥0.99 and determination coefficient ≥0.98. The calculated limit of detection (LOD) was 8.53 μg/ml, while the limit of quantitation (LOQ) was 25.85 μg/ml. The percent recoveries of fortified samples were 100% ± 10% and precision relative standard deviation was ≤2.79%. The criteria of validation showed accuracy, linearity, and precision; therefore the method is suitable for quantitative analysis of rebaudioside D in Stevia rebaudiana leaves. Rebaudioside D content (g/100g) in Morita II and Criolla varieties grown in the southeast of Mexico were 0.43 and 0.46, respectively with no significant differences (p > 0.05) between them.
Determination of Rebaudioside A and Stevioside in Leaves of S. rebaudiana Bertoni Grown in México by a Validated HPLC Method  [PDF]
Irma Aranda-González, Yolanda Moguel-Ordo?ez, David Betancur-Ancona
American Journal of Analytical Chemistry (AJAC) , 2015, DOI: 10.4236/ajac.2015.611083
Abstract: Stevia rebaudiana is a plant with high sweetening capacity due to its content of glycosides, mainly stevioside and rebaudioside A. Several techniques have been used to determine the concentrations of glycosides in Stevia, although an HPLC method is recommended by the FAO/WHO-JECFA. Varieties of Stevia have been recently grown in Mexico, with no previous report of glycosides by a validated method. The aim of this study was to validate an isocratic HPLC method for content determination of main glycosides in the leaves of Stevia cultivated in Mexico. HPLC method was performed using a C18 column (250 mm × 4.6 mm, 5 μm) and UV detector set at 210 nm. The mobile phase consisted of 32:68 (v/v) mixture of acetonitrile and sodium-phosphate buffer (10 mmol/L, pH 2.6), set to a flow rate of 1.0 mL/min. Rebaudioside A and stevioside were determined in two Stevia varieties: Morita II and Criolla, and also validation parameters were calculated. Rebaudioside A content (g/100g) in Morita II was 15.15 ± 0.02 while stevioside was 3.97 ± 0.003; in the case of Criolla they were 4.03 ± 0.01 and 8.80 ± 0.14, respectively (p < 0.001). The recoveries of fortified samples were 100% ± 10% and precision RSD was ≤6.27%. The criteria of validation showed accuracy, linearity (≥0.99), and precision; therefore, the determination of glycosides was performed with reliability.
An ArcGIS Geo-Morphological Approach for Snow Avalanche Zoning and Risk Estimation in the Province of Bergamo  [PDF]
Barbara Marana
Journal of Geographic Information System (JGIS) , 2017, DOI: 10.4236/jgis.2017.92006
Abstract: This paper describes the results of a study developed, with a GIS approach, at the University of Bergamo, about snow avalanche zoning and risk assessment in the Province of Bergamo. The adoption of a simplified estimation model, presented here, nonetheless allowed achieving results in good accordance with those provided by previous, more rigorous studies at the Province of Bergamo. A following analysis has also been performed to estimate ski lifts, urban areas, power lines, highways, railroads and roads at possible risk. This is a work in progress, since further development has already been taken into account to enrich the risk model with more parameters describing land morphology and meteorology. These results will then be used to simulate accidents and to estimate the shortest routes for rescuers. Finally, the development of a geo-app for mobile devices could become a very useful and fast tool for avalanche risk areas information.
A Simplified ArcGIS Approach for Landslides Risk Assessment in the Province of Bergamo  [PDF]
Barbara Marana
Journal of Geographic Information System (JGIS) , 2017, DOI: 10.4236/jgis.2017.96044
Abstract: The paper describes a simplified GIS approach, for landslides risk assessment in the Province of Bergamo, developed for a GIS degree thesis at the faculty of Engineering of the University of Bergamo. The subject has been and still is largely studied by many researchers with the aid of rigorous mathematical/statistical analysis tools. This work follows some procedures carried out by other studies, but at the end it has been decided to adopt a simple, fast and not rigorous way to find a solution. A following analysis, on the higher risk areas identified, has also been performed to test their reliability, allowing achieving satisfactory results. It has been planned to study the risk model more thoroughly, by taking into account other triggering causes for landslide susceptibility and to try also a rigorous approach, so as to get a better idea of the results achieved so far and how to improve them.
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