Composite polymer membranes for laserinduced fluorescence thermometry

We demonstrate a modified version of laser-induced fluorescence thermometry (LIFT) for mapping temperature gradients in the vicinity of small photothermal devices. Our approach is based on temperature sensitive fluorescent membranes fabricated with rhodamine B and polydimethylsiloxane (PDMS). Relevant membrane features for LIFT, such as temperature sensitivity, thermal quenching and photobleaching are presented for a range of 25 °C to 90 °C, and their performance is evaluated upon obtaining the temperature gradients produced in the proximity of optical fiber micro-heaters. Our results show that temperature measurements in regions as small as 750 μm x 650 μm, with a temperature resolution of 1 °C, can be readily obtained

Validation of the Spanish version of the Fear of Self Questionnaire

Cognitive models, from both the appraisal and inferential confusion perspectives, propose that the self is a relevant variable in the development and maintenance of obsessive-compulsive (OC) disorder. In this study, we examined the psychometric properties of the Spanish version of the Fear of Self Questionnaire (FSQ) and analyzed the role of the fear of self (the sort of person we are afraid of becoming) as a predictor of OC beliefs and symptoms. A sample of 359 non-clinical participants completed a set of questionnaires, including the FSQ. Confirmatory factor analysis replicated the original one-factor solution for both the FSQ-8- and 20-item versions. The FSQ demonstrated excellent reliability, and fear of self predicted OC symptoms and cognitions, especially unacceptable obsessions

On the galactic rotation curves problem within an axisymmetric approach

In U. Nucamendi et al. Phys. Rev. D63 (2001) 125016 and K. Lake, Phys. Rev. Lett. 92 (2004) 051101 it has been shown that galactic potentials can be kinematically linked to the observed red/blue shifts of the corresponding galactic rotation curves under a minimal set of assumptions: the emitted photons come from stable timelike circular geodesic orbits of stars in a static spherically symmetric gravitational field, and propagate to us along null geodesics. It is remarkable that this relation can be established without appealing at all to a concrete theory of gravitational interaction. Here we generalize this kinematical spherically symmetric approach to the galactic rotation curves problem to the stationary axisymmetric realm since this is precisely the symmetry that spiral galaxies possess. Thus, by making use of the most general stationary axisymmetric metric, we also consider stable circular orbits of stars that emit signals which travel to a distant observer along null geodesics and express the galactic red/blue shifts in terms of three arbitrary metric functions, clarifying the contribution of the rotation as well as the dragging of the gravitational field. This stationary axisymmetric approach distinguishes between red and blue shifts emitted by circularly orbiting receding and approaching stars, respectively, even when they are considered with respect to the center of a spiral galaxy, indicating the need of precise measurements in order to confront predictions with observations. We also point out the difficulties one encounters in the attempt of determining the metric functions from observations and list some possible strategies to overcome them.Comment: 7 pages in latex (MNRAS format), no figures, discussion and references adde

Actividades físicas recreativas para preparar a la familia en el desarrollo motor en niños (Original)

The research carried out addresses the stimulation of the motor development of children of the 5th year of life from a set of recreational physical activities, and the importance of family preparation. The objective is aimed at proposing a set of recreational physical activities that contribute to enhancing the preparation of the family for the Educa a tu Hijo program for children in the 5th year of life. The following were used as research methods: analysis-synthesis, inductive-deductive, documentary review, observation, survey, interview and empirical distribution of frequencies. The study carried out demonstrated the insufficiencies and potentialities that are presented during the educational process at this stage, in addition to the need and attention especially aimed at promoting the preparation of the family under the guidance of the executors and other people who have their influence on them. , for the educational intervention linked to the development of motor activity, which will have a favorable impact on the healthy growth of children. The set of recreational physical activities proposed in this research is made up of sections of activities for work with the different basic motor skills, such as walking, running, climbing, jumping, throwing and climbing, with suggestions for objectives, means and suggestions. methodological. This proposal, in the hands of the executors and families participating in the Educa a tu Hijo program, constitutes a way to prepare these factors in the comprehensive education of children in the 5th year of life.En la investigación realizada se aborda la estimulación del desarrollo motor de los niño/as del 5to año de vida a partir de un conjunto de actividades físicas recreativas, y la importancia de la preparación de la familia. El objetivo está dirigido a proponer un conjunto de actividades físicas recreativas que contribuyan a potenciar la preparación de la familia del programa Educa a tu Hijo de los niño/as del 5to año de vida. Fueron utilizados como métodos de investigación los siguientes: análisis-síntesis, inductivo-deductivo, la revisión documental la observación, la encuesta, la entrevista y la distribución empírica de frecuencias. El estudio realizado demostró las insuficiencias y potencialidades que se presentan durante el proceso educativo en esta etapa, además de la necesidad y la atención especialmente dirigida a potenciar la preparación de la familia bajo la orientación de los ejecutores y demás personas que tienen su influencia sobre estas, para la intervención educativa vinculada al desarrollo de la actividad motriz, lo que repercutirá favorablemente en el crecimiento saludable de los pequeños. El conjunto de actividades físicas recreativas que se propone en la presente investigación está conformado por secciones de actividades para el trabajo con las diferentes habilidades motrices básicas, como caminar, correr, escalar, saltar, lanzar y trepar, con sugerencias de objetivos, medios y sugerencias metodológicas. Esta propuesta, en manos de los ejecutores y de las familias participantes en el programa Educa a tu Hijo, constituye una vía para la preparación de estos factores en la educación integral de los niño/as del 5to año de vida

Effect of ripening on physico-chemical properties and bioactive compounds in papaya pulp, skin and seeds

Byproducts generated by the food industry represent an alternative to obtain functional ingredients. Byproducts of tropical fruits, such as papaya skin and seeds, represent a source of bioactive compounds (BC), which could change during fruit ripening. Effect of ripening stage (RS) on BC content and antioxidant properties of edible pulp, skin and seeds of papaya cv. Maradol was determined. Papaya skin showed significantly higher ascorbic acid (~250 mg AAE/100 g) content than seeds (~20 mg/100 g), while pulp had the highest values (~600 mg/100 g). However, papaya skin presented higher total phenolic content (~560 mg GAE/100 g) and flavonoids (~1000 mg QE/100 g) than pulp and seeds. Also, papaya skin showed the highest values followed by pulp and seeds with TEAC, FRAP and DPPH. Papaya skin had higher carotenoids and α-tocopherol (~1500 µg/100 g and ~4000 µg/100 g, respectively) content than pulp and seeds. BC content in each byproduct varied in all RS. Therefore, among the papaya byproducts, skin represents a good source of BC with good antioxidant properties, which may be used to extract them for its incorporation in functional foods depending on RS

Tamaño de área de drenaje y conectividad hidrológica en la formación de escorrentía en cuencas semiáridas mediterráneas. Cuenca aforada del Barranc del Carraixet

The rainfall-runoff conversion is analysed taking in consideration the contributing area and hydrological connectivity, factors needing better understanding. Within the same basin, the Barranc del Carraixet near Valencia, has been selected three scales of work: four experimental plots (8 x 40 m), micro-basin (17.01 ha) and small drainage basin (127.9 km2). For the analysis of runoff generation at different scales rainfall thresholds and runoff rates and thresholds were used. For hydrological connectivity, at plot level, coefficients of determination were analyzed. Inverse relationship is given between the volume of runoff and recurrence, with increasing scale. Connectivity, at plot level, is variable, increasing the R2 according the simplification of processes, when the interference of vegetation decreases, establishing better linearity between rain and surface flow.Se analizan las relaciones de la conversión de la lluvia en escorrentía superficial atendiendo al tamaño del área de aporte y la conectividad hidrológica, factores poco estudiados. En una misma cuenca, la del Barranc de Carraixet en las cercanías de Valencia, se han seleccionado tres escalas de trabajo: cuatro parcelas experimentales (8 x 40 m), microcuenca (17,01 ha) y cuenca de drenaje de pequeño tamaño (127,9 km2). Para el análisis de la formación de escorrentía en las distintas escalas se utilizaron los umbrales de precipitación, índices y umbrales de escorrentía. Para la conectividad hidrológica, a escala de parcela, se analizaron los coeficientes de determinación. Se ha obtenido una relación inversa en volumen de escorrentía y en recurrencia, según aumenta la escala. La conectividad, a escala de parcela, es variable, aumentando el R2 con la simplificación de los procesos, sobre todo al disminuir la interferencia de la vegetación, estableciéndose mayor linealidad entre la lluvia y el flujo superficial

Quantic Analysis of the Adherence of a Gram-Negative Bacteria in A HEPA Filter

It is known that Gram-negative bacteria (GNB) are the most frequent bacteria in hospital units. It is also known that GNBs generate a greater number of nosocomial infections in critical areas. In the present work, the adhesion of the bacterial cell wall (BCW) to the compounds of the material layers of a high efficiency filter (HEPA) was analyzed. The analysis was carried out by means of molecular simulation and quantum chemistry. The BCW and HEPA molecules were designed using Hyperchem software for simulation. The calculations of the quantum interactions of the molecules were carried out using the theory of the electron transfer coefficient (ETC). It obtained from 4 to 6 compounds that are more likely to interact even as a chemical reaction. The compounds of the glass fibers are the ones that work best for the adhesion and destruction of the BCW

Afrontamiento y resiliencia en el contexto de atención sanitaria oncológica de GuatemalaCoping and resilience in the context of oncological health care in Guatemala

Trabajar en atención sanitaria supone una serie de dificultades que pueden sobrepasar las capacidades de regulación y afrontamiento frente situaciones estresantes, afectando directamente la adaptación al entorno. La literatura reporta que la búsqueda de equilibrio ante situaciones estresantes se relaciona con altos niveles de resiliencia y el uso de estrategias de afrontamiento. El enfoque fue cuantitativo de alcance correlacional. El objetivo del estudio fue determinar qué estrategias de afrontamiento se correlacionan positivamente con puntajes altos de resiliencia, ya que tal relación es un indicador de adaptabilidad. La muestra por disponibilidad compuesta por 45 empleados de una institución que atiende pacientes oncológicos en la ciudad de Guatemala. Para la recolección de datos se utilizaron la escala, Coping Strategies Inventory (CSI) en su versión en español y la escala Connor-Davidson Resilience Scale (CD-RISC) y un cuestionario sociodemográfico elaborado por el equipo. Losresultados sugieren que la estrategia de afrontamiento expresión emocional se correlaciona positivamente (r = .31, p < .05) con altos niveles de resiliencia y también la estrategia autocrítica con un 16.81% de magnitud de efecto. Los hallazgos pueden contribuir al desarrollo de programas de afrontamiento y resiliencia basados en evidencia empírica

Heavy Meson Description with a Screened Potential

We perform a quark model calculation of the $b\bar{b}$ and $c\bar{c}$ spectra from a screened funnel potential form suggested by unquenched lattice calculations. A connection between the lattice screening parameter and an effective gluon mass directly derived from QCD is established. Spin-spin energy splittings, leptonic widths and radiative decays are also examined providing a test for the description of the states.Comment: 17 pages, no figures, to appear in Phys. Rev.

Quantic Analysis of Formation of a Biomaterial of Latex, Retinol, and Chitosan for Biomedical Applications

The present work shows the quantum theoretical analysis and practical tests for the formation of a homogeneous mixture with Latex (Lx), Chitosan (Qn) and Retinol (Rl), which work as possible biomaterial for regeneration of epithelial tissue. Lx, Qn, and Rl compounds molecules were designed through Hyperchem to get the coefficient of electrostatic potential calculations. The amounts used to create the biomaterial are minimum depending on the quantities of molecules used in chemical design. A positive calculation was obtained for the reaction of these three compounds and the formation of the biomaterial in physical checking theory etc