Recordando memoria : shaping Chicana identity

This research explored the self-concept of Chicanas in terms of their lived experiences and how those experiences influenced the shaping of their identity. It examined the multiple labels Chicanas use to self-identify and the context or situations in which they use specific labels. Moreover, it took into account the influence of gender, ethnicity, language, race, and culture on their concept of self. My study employed interpretive and collaborative research methods and included my own narrative story as part of the analytical process. It draws on a Chicana femenista (feminist) pedagogy that is heavily influenced by an Indigenous perspective as the conduit for the construction and transmission of knowledge. My objectives during the course of the study were to explore the many facets of Chicanas' experiences and challenge prevailing notions about our identity. The chief method for collecting data was interactive, dialogic interviews with five Chicana participants. During the loosely structured interviews, the women were asked to narrate their life stories as they related to the shaping of their concept of self. The women's detailed narratives and personal reminiscences as well as my own provided the data that was analyzed and interpreted to examine Chicana identity. The women were co-participants in "making sense" of the data. They provided guidance, expressed opinions, and helped to construct the meaning of their lived experiences. The results of the interpretation process indicated that culture and the intersecting factors of gender, language, age, ethnicity, and race shaped the participants' concept of self. Hence, their identity was culturally learned and mediated via their perceptions of the world. In turn, their worldview was influenced by the aforementioned factors. The women's narratives also suggested that they used multiple identity labels and that they were contextual. Thus, identity can change or evolve over the course of one's lifespan and through one's lived experiences. As such, Chicana identity is not fixed. As Chicanas we are constructing our own identity rather than allowing it to be imposed by others. Moreover, we are extending the possibility that we continually construct our identity

Desarrollo e implementación de sistema de facturación en Miscelánea "El Encanto" SYSFACT-MEN, usando la metodología ágil Crystal Clear

El presente documento se centra en la implementación y documentación de las Metodologías Ágiles en especial Crystal clear que es una de las clasificaciones de la familia Crystal, creada por Alistair Cockburn con el fin de obtener una metodología ligera e informal.Analizando previamente las ventajas y desventajas entre las metodologías Tradicionales y las nuevas tendencias de desarrollo aplicando las metodologías Ágiles, se desarrolló un sistema de facturación que lleva por nombre SYSFACT_MEN para una miscelánea localizada en el departamento de Masaya-Nicaragua, aplicando las fases , estrategias y técnicas que brinda crystal clear, centrándose principalmente en la iteración e integración, en donde el grupo de trabajo y la comunicación son los elementos principales para su desarrollo.Para el desarrollo del sistema se usaron herramientas que nos ayudaron a obtener artefacto que la metodología recomienda entregar durante la elaboración del proyecto y su posterior entrega

Soroprevalência da infecção pelo T. cruzi em doadores de sangue e cardiomiopatia chagásica em pacientes da região carbonífera de Coahuila, México

Context and Objective: Chagas disease is considered a worldwide emerging disease; it is endemic in Mexico and the state of Coahuila and is considered of little relevance. The objective of this study was to determine the seroprevalence of T. cruzi infection in blood donors and Chagas cardiomyopathy in patients from the coal mining region of Coahuila, Mexico. Design and Setting: Epidemiological, exploratory and prospective study in a general hospital during the period January to June 2011. Methods: We performed laboratory tests ELISA and indirect hemagglutination in three groups of individuals: 1) asymptomatic voluntary blood donors, 2) patients hospitalized in the cardiology department and 3) patients with dilated cardiomyopathy. Results: There were three levels of seroprevalence: 0.31% in asymptomatic individuals, 1.25% in cardiac patients and in patients with dilated cardiomyopathy in 21.14%. Conclusions: In spite of having detected autochthonous cases of Chagas disease, its importance to local public health remains to be established as well as the details of the dynamics of transmission so that the study is still in progress.Contexto e Objetivo: A doença de Chagas é mundialmente considerada uma doença emergente, é endêmica no México e no estado de Coahuila e considerada de pouca relevância. O objetivo do estudo foi determinar a soroprevalência da infecção pelo T. cruzi em doadores de sangue e cardiomiopatia chagásica em pacientes da região carbonífera de Coahuila, México. Desenho e Local: Estudo epidemiológico, exploratório e prospectivo em um hospital geral no período de janeiro a junho de 2011. Métodos: Foram realizados testes de laboratório ELISA e hemoglutinação indireta em três grupos de indivíduos: 1) doadores de sangue voluntários assintomáticos, 2) pacientes internados na área de cardiologia e 3) pacientes com cardiomiopatia dilatada. Resultados: Foram achados três níveis de soroprevalência: 0,31% em indivíduos doadores de sangue assintomáticos, 1,25% em pacientes cardiopatas e, em pacientes com cardiomiopatia dilatada 21,14%. Conclusão: Detectamos casos autóctones de doença de Chagas em área considerada não endêmica. Deve ser determinada sua importância na saúde pública regional e local, para estabelecer os detalhes do mecanismo de transmissão. O estudo ainda está em desenvolvimento

Validación de una metodología analítica para la cuantificación de naproxeno en estudios de reparto líquido/líquido mediante espectrofotometría ultravioleta

Se realizó la validación de la metodología analítica para la cuantificación de naproxeno (NAP) en medios acuosos de pH 1,2 y fuerza iónica m 0,15 mol L–1 y de pH 7,4 y m 0,15 mol L–1, los cuales son empleados en estudios de la transferencia de este fármaco entre fases líquidas inmiscibles. El método analítico fue la espectrofotometría UV, en razón de que el NAP presenta en su estructura molecular grupos cromóforos compatibles (naftilo y carbonilo), los cuales permiten obtener una adecuada absorción en la región UV. Los parámetros validados en cada uno de los sistemas buffer fueron: especificidad, linealidad, repetibilidad del instrumento de medida y del método, y precisión intermedia. Adicionalmente se presentan los resultados del reparto de NAP en diferentes sistemas líquido/líquido a 25,0 °C a los dos valores de pH.The validation of an UV spectrophotometric analytical methodology for quantification of naproxen (NAP) in aqueous media of pH 1,2 and 7,4, and ionic strength 0,15 mol L–1 was developed. The validated methodology is intended to NAP liquid/liquid partitioning studies. UV spectrophotometry was employed because NAP has chromophoric groups (naftyl and carbonyl) thus, allowing good absorption in the UV region. The validated parameters in each pH studied were the following: specificity, linearity, measurement instrument reproducibility, method reproducibility, and intermedium precision. The NAP partitioning at both pH values at 25,0 °C in several liquid/liquid systems was also studied

1D and 3D supramolecular structures exhibiting weak ferromagnetism in three Cu(II) complexes based on malonato and di-alkyl-2,2’-bipyridines

Abstract Manganese coordination polymers {Mn(- fum)(5dmb)(H2O)2}n (1) and {[Mn2(fum)2(4dmb)2] H2O}n (2) (fum= fumarato; 5dmb = 5,50-dimethyl-2,20-bipyridine; 4dmb = 4,40-dimethyl-2,20-bipyridine) were obtained from one-pot, solution reactions under ambient conditions. The fum ligand acquires different coordination modes in the presence of the different dmb ancillary ligands, promoting distinctive crystal structures, including divergent dimensionalities. Thus, X-ray single-crystal data reveal that complex 1 crystallizes in a monoclinic system with C2/c space group and forms an infinite one-dimensional polymer. The Mn(II) center is six-coordinated and displays a distorted octahedral configuration. In addition, the solid-state selfassembly of the polymeric structure of 1 gives rise to a twodimensional (2D) supramolecular framework, mainly through hydrogen bonding. In contrast, complex 2 crystallizes in a monoclinic system with a Cc space group and forms an infinite 2D coordination polymer having dinuclear units. The Mn(II) center has a distorted octahedral configuration. The thermal stabilities of both coordination polymers were investigated. Variable-temperature magnetic measurements show that complex 1 is paramagnetic, while complex 2 exhibits weak antiferromagnetic coupling between adjacent Mn(II) centers.supported by CONACyT project 129293, DGAPA-UNAM project IN106014, and ICYTDF, project PICCO

Impact of an intermittent and localized cooling intervention on skin temperature, sleep quality and energy expenditure in free-living, young, healthy adults

Where people live and work together it is not always possible to modify the ambient temperature; ways must therefore be found that allow individuals to feel thermally comfortable in such settings. The Embr Wave (R) is a wrist-worn device marketed as a 'personal thermostat' that can apply a local cooling stimulus to the skin. The aim of the present study was to determine the effect of an intermittent mild cold stimulus of 25 degrees C for 15-20 s every 5 min over 3.5 days under free-living conditions on 1) skin temperature, 2) perception of skin temperature, 3) sleep quality and 4) resting energy expenditure (REE) in young, healthy adults. Ten subjects wore the device for 3.5 consecutive days. This intervention reduced distal skin temperature after correcting for personal ambient temperature (P = 0.051). Thus, this intermittent mild cold regime can reduce distal skin temperature, and wearing it under free-living conditions for 3.5 days does not seem to impair the perception of skin temperature and sleep quality or modify REE.The study was funded by the Spanish Ministry of Economy and Competitiveness via the Fondo de Investigacion Sanitaria del Instituto de Salud Carlos III (PI13/01393 and CB16/10/00239) and PTA 12264-I, Retos de la Sociedad (DEP2016-79512-R), and European Regional Development Funds (ERDF). Other funders included the Spanish Ministry of Education (FPU 16/05159, 15/04059 and 19/02326), the Fundacion Iberoamericana de Nutricion (FINUT), the Redes Tematicas De Investigacion Cooperativa RETIC (Red SAMID RD16/0022), the AstraZeneca Health Care Foundation, the University of Granada Plan Propio de Investigacion 2016 (Excellence actions: Unit of Excellence on Exercise, Nutrition and Health [UCEENS]), and by the Junta de Andalucia, Consejeria de Conocimiento, Investigacion y Universidades (ERDF, SOMM17/6107/UGR). AMT was supported by Seneca Foundation through grant 19899/GERM/15 and the Ministry of Science Innovation and Universities RTI2018-093528-B-I0, as well as DJP (MINECO; RYC-2014-16938). BMT was supported by an individual postdoctoral grant from the Fundacion Alfonso Martin Escudero. We thank Dr. Matt Smith of Embr Labs Inc. for configuring the Embr Wave (R) devices used in this experiment

Procesos de enseñanza/aprendizaje entre pares al interior del second life

Este artículo presenta el análisis de algunas prácticas no institucionalizadas de enseñanza-aprendizaje al interior del Second Life, a través de las cuales se visibilizan estrategias mediacionales como la descripción, modelado y valoración de procedimientos. Una particularidad central de las prácticas seleccionadas para este estudio, es que los usuarios participantes pese a que adoptan roles de profesores/tutores o aprendices, no se asumen como tales. Metodológicamente, el acercamiento es realizado a través de observación participativa en línea dentro de la Isla Reforma en el Second Life, así como de entrevistas semiestructuradas. Entre los hallazgos destacan: a) La repetición en el espacio virtual de procesos de enseñanza interiorizados por los sujetos en sus experiencias escolarizadas y analógicas previas. b) El grado de “libertad y flexibilidad” que le confieren algunos usuarios a las interacciones en el Second Life VS las que estarían dispuestos a entablar en una relación cara a cara. c) La relación entre apoyo/tutoría/donación y el posicionamiento del sujeto a través de su avatar, en la grupalidad. d) El potencial que la enseñanza/aprendizaje entre pares representa para procesos de formación continua y no institucionalizada. Palabras clave Enseñanza/aprendizaje entre pares, trabajo colaborativo, comunidad virtual, Second Life

Contribución al manejo reproductivo de Coccoloba coweellii Britton; especie En Peligro Crítico de extinción/Contribution to the reproductive management of Coccoloba coweellii Britton; Critically Endangered specie

La valoración de diversos aspectos de la biología reproductiva, permitió establecer precisiones sobre el acopio de semillas, necesarias para la conservación en Coccoloba cowellii Britton (Polygonaceae), endémico estricto de la flora de la provincia Camagüey, Cuba, categorizada En Peligro Crítico (CR). Se registra por primera vez la frecuente aparición de nuevos vástagos por la emisión de sierpes y una relación de 4:6 entre individuos funcionalmente pistilados y estaminados, estimándose en un 60 % la proporción de semillas inviables por formarse sin previa fecundación. Se fundamenta la necesidad de identificar los brotes pistilados desde el momento de la floración./ The assessment of various aspects of reproductive biology, allowed to establish precisions on the collection of seeds, necessary for conservation in Coccoloba cowellii Britton (Polygonaceae), strict endemic of the province Camagüey flora, Cuba, categorized as Critically Endangered (CR). The frequent occurrence of new shoots due to the emission of serpents and a 4: 6 ratio between functionally pistillated and staminated individuals is recorded for the first time, estimating in 60% the proportion of non-viable seeds, formed without prior fertilization. The need to identify the pistillate buds from the moment of flowering is based