Zinc oxide films were made by spray pyrolysis equipped with an optical system for in-situ thickness measurement; zinc acetate water solution was used as spraying solution. The pH of the spraying solution was modified in order to increase the film porosity. Morphology and structure of the films were analyzed by scanning electron microscopy and x-ray diffraction, respectively. X-ray pattern revealed that films were zincite-like with a preferential growth in the [002]-direction. The optical absorbance of the methyl orange aqueous solution and the optical transmittance of ZnO-based films were measured in the wavelength range of 350-800 nm. Those measurements allowed both to control the photo-electrocatalytic degradation of methyl orange and to correlate the optical measurements with surface morphology of ZnO-based films. The zinc oxide based films obtained at different pH conditions of the s...

La identificación de los genes de respuesta a condiciones extremas como altas temperaturas, alta concentración de metales de arsénico, pH muy bajo permitiría el establecimiento de procesos mas rápidos y eficientes de tratamiento de minerales mediante biominería. En este proceso los sulfuros metálicos insolubles son oxidados a sulfatos metálicos solubles (Rawlings & Silver, 1995). En el presente informe se presentan los avances en el aislamiento y caracterización de las poblaciones de microorganismos acidófilos y quimilitotróficos bioxidantes de fierro y sulfuros actuantes en la biooxidación de arsenopirita. Se han aislado microorganismos del género Acidithiobacillus y Leptospirillum en cultivos de 105 ufc/ml en placa (proporción 1.5:1) identificados por morfología en coloración Gram y visualizados en el microscopio óptico (1000X).

The effect of feed supplementation with barley meal and mineral block on body weight gain, feed intake, feed conversion index, slaughter age, production cost and profit/cost ratio was evaluated in guinea pigs fed with alfalfa. A total of 250 male weaned animals were used in a completely randomized block design with a 2x2 factorial arrangement (barley meal x mineral block) and one additional treatment for contrast (balanced diet).Barley meal supplementation significantly improved (p<0.05) body weight gain, feed intake, feed conversion index, benefit cost ratio and decreased slaughter age while mineral block supplementation only decreased slaughter age (p<0.05). On the other hand,plain forage without supplements and forage plus barley meal showed the best economic results.

The effect of feed supplementation with barley meal and mineral block on body weight gain, feed intake, feed conversion index, slaughter age, production cost and profit/cost ratio was evaluated in guinea pigs fed with alfalfa. A total of 250 male weaned animals were used in a completely randomized block design with a 2x2 factorial arrangement (barley meal x mineral block) and one additional treatment for contrast (balanced diet).Barley meal supplementation significantly improved (p<0.05) body weight gain, feed intake, feed conversion index, benefit cost ratio and decreased slaughter age while mineral block supplementation only decreased slaughter age (p<0.05). On the other hand,plain forage without supplements and forage plus barley meal showed the best economic results.

El presente artículo resalta la importancia de las estrategias de aprendizaje de lenguas (EAL) como métodos de apoyo relacionados con los procesos de educación inclusiva (EI), así como buscar las específicas para la enseñanza de idiomas en alumnos con trastorno por déficit de atención (TDA) con el fin de obtener un aprendizaje significativo y funcional. Después de analizar las EAL y atendiendo a las dificultades a las que se enfrentan los aprendices con TDA en el aprendizaje de las lenguas extranjeras, llegamos a la conclusión de que las más adecuadas son las de compensación y afectivas o socio-afectivas, ya que principalmente estas estrategias de instrucción específica realzan su rendimiento de habilidad, les hace partícipes del proceso de enseñanza-aprendizaje y les prepara para hacer sus propias intervenciones, eliminando el estrés de una clase normal del día a día,...

This paper highlights the importance of language learning strategies (LLS) as support methods related to inclusive education (IE) processes, and tries to find specific language teaching strategies for students with attention deficit disorder (ADD) in order to achieve a meaningful and functional learning. After analyzing the LLS and taking into account the difficulties learners with ADD face when learning foreing languages, we reach the conclusion that the most appropriate are the compensation and affective or socioaffective strategies, since these specific education strategies enhance their skills performance, make them part of the teaching-learning process and prepare them to make their own interventions, eliminating the stress of a regular day-to-day class, catching their attention and increasing their motivation.

In this work, graphite powder was used as initial material to obtain graphene oxides (GO). We propose the reduction of graphene oxides, by physical-chemical method, which consists in a thermo and chemical reduction in the presence of NaBH4 to obtain reduced graphene oxides (RGO). Furthermore, the presence of functional groups and the nanocrystal size were determined by Visive, FTIR and Raman spectroscopy in both samples, GO and RGO. Thereby, we observe that the use of physical-chemical method to obtain RGO produces a signicant defects decrease, shown by the D band of the Raman spectrum which practically disappear after this reduction. In addition to this, a morphological study made by AFM have shown relative ats surfaces in the nano-graphene samples obtained by the presented technique.

Se muestran los resultados de la estandarización y uso de una técnica para hacer la hibridización in situ con fluorescencia (FISH) en el Laboratorio de Citogenética y Radiobiología del Instituto Peruano de Energía Nuclear (IPEN). Tras una búsqueda de información bibliográfica se decidió trabajar con el método que emplea sondas para cromosoma total marcadas con un fluorocromo de emisión verde (WCP). Se hizo el estudio con dos muestras de sangre irradiadas y una muestra control. Las dosis suministradas a dos de las muestras fueron 0.75 y 1.8 Gy de rayos gamma del Co-60. Por razones de tipo económico se tuvo que trabajar tan solo con las sondas para los cromosomas 1 y 2. Eso ha causado que nuestra eficiencia para detectar translocaciones por FISH haya sido baja (25%) siendo usual en otros laboratorios trabajar con eficiencias de alrededor del 33% para lo cual debemos incluir al...

Objetivos: Comprobar si las competencias profesionales, características y cualidades del nutricionista egresado de la EAP Nutrición están de acuerdo a las expectativas de las instituciones empleadoras. diseño: Estudio descriptivo, transversal, observacional. Institución: Facultad de Medicina, UNMSM. Participantes: Directivos de empleadoras de nutricionistas. intervenciones: A 28 instituciones empleadoras de nutricionistas egresados de la UNMSM, se aplicó una encuesta con el listado de competencias del plan curricular para cada área de desempeño profesional: Nutrición Clínica, Nutrición Pública, Servicios de Alimentación Colectiva y Deporte. Principales medidas de resultados: Competencias, características y cualidades, según áreas de desempeño profesional. Resultados: Todas las competencias en las diferentes áreas del listado fueron consideradas importantes para el desem...

Ichu and Cabuya were characterized and the effect of alkali treatment on the chemical and physical properties of these fibers was studied. This treatment was carried out to remove non-cellulosic components in order to improve the adhesion of these fibers to be used as reinforcing composites since they are currently being tested in polymer matrix composites. The chemical properties were investigated through TAPPI Standards and FTIR spectroscopy. The physical properties (microfibrillar angle and density) were analyzed through polarized light microscopy and a gas pycnometer, respectively. The results show that with this chemical treatment, it is possible to remove 53.9% of lignin and 22.7% of hemicellulose for Ichu fiber and 50.7% and 91.7%, respectively, for Cabuya. Besides, it was found that the microfibrillar angle is not affected by this chemical treatment since its effect is only super...

Total Station has been one of the most common acquisition devices for achieving maps through topographic survey. Nowadays, Terrestrial Laser Scanner (TLS) and Photogrammetry are commonly used to generate accurate meshes. In addition, commercial products such as Kinect offer low cost technology to acquire point-cloud information. The present paper aims to measure the accuracy of these digital modelling techniques by employing elevation contour maps, surface deviations and distance measurements. For this purpose, a 450 m sector of the Qhapaq Nan located in Lima-Peru, was selected as a case of study. A camera-enabled drone was used for acquiring pictures to obtain a high-resolution photogrammetric model. Subsequently, a 3D survey of the monument was conducted with a time-of-flight laser scanner. Contour elevation lines where extracted from TLS, Photogrammetry and Total Station models at the...

The study aimed to determine demographic indicators of the population of domestic dogs and cats with owner in human settlements in the district of Ventanilla, Callao (Peru). A cluster sampling was performed to select the population groups and a stratified and systematic sampling was used to select the dwellings. The information was collected through a survey. The demographic characteristics of dogs and cats, and the relation dog:person and cat:person was calculated. In total, 61.9 and 40.0% of the houses owned dogs and cats, respectively. The number of pets per household was 1.8 in both species. The number of offspring in dogs was 4.3 and in cats was 3.1. The estimated survival rate was 56.2 ± 3.0% for puppies and 66.4 ± 3.9% for kittens. The estimated life expectancy was 4.21 ± 0.44 years in dogs and 2.64 ± 0.46 years in cats. It was estimated that there were 1 dog per 3.98 persons ...

El estudio tuvo como objetivo determinar indicadores demográficos de la población de canes y gatos domésticos con dueño en asentamientos humanos del distrito de Ventanilla, Callao (Perú). Se realizó un muestreo por conglomerado para seleccionar los grupos poblacionales y un muestreo estratificado y sistemático para seleccionar las viviendas. La información fue recolectada mediante una encuesta. Se calcularon las características demográficas de la tenencia de canes y gatos, y la relación can:persona y gato:persona. El 61.9 y 40.0% de las viviendas poseían canes y gatos, respectivamente. El número de mascotas por vivienda fue de 1.8 para ambas especies. El número de crías en los canes fue de 4.3 y en gatos de 3.1. La tasa de supervivencia estimada de las crías fue de 56.2 ± 3.0% en canes y de 66.4 ± 3.9% en gatos. La esperanza de vida estimada fue de 4.21 ± 0.44 años en...