Análisis de barreras de transición a software libre y creación de un protocolo de implementación en centros educativos

A partir de la investigación desarrollada en el campo del software libre se pretende dar una visión de las cuestiones que existen a la hora de realizar una transición y migración a este tipo de software. Para ello se han estudiado los diferentes problemas existentes y todo el camino a recorrer para conseguir la implantación en centros educativos.

Polifosfatos em detergentes em pó comerciais

A didactic experiment is proposed in order to identify inorganic phosphates in home laundry detergents by ascending paper chromatography. Chemical principles related with hard water are also investigated. The role of polyphosphates in detergent formulations is discussed and the softening of hard water by sodium tripolyphosphate is illustrated. Several chemical concepts, related to the daily experience of the students, can be explored in post-lab discussions.

La influencia del lenguaje cotidiano en el desarrollo de la escritura de los inmigrantes en los centros educativos

El objetivo de nuestra investigación es demostrar la importancia deluso de la lengua escolar fuera del entorno educativo y como este uso podría repercutir notablemente en el rendimiento académico del alumnado inmigrante. Según nuestra hipótesis, los alumnos inmigrantes que no practican en su vida cotidiana la lengua que se usa en los centros educativos realizarán más errores en la escritura que aquellos alumnos inmigrantes que sí practican dicho lenguaje fuera del entorno educativo. Las técnicas que emplearíamos para recopilar y clasificar la información serían cuestionarios y un corpus lingüístico. Los resultados que esperamos obtener son un número considerablemente alto de errores en la escritura por parte de los alumnos inmigrantes que no hablan el catalán en su entorno social no escolar, mientras que los alumnos autóctonos y los alumnos inmigrantes que sí practican el catalán fuera del ámbito educativo obtendrían mejores resultados. Estos resultados nos proporcionarían una evidencia más sobre la importancia del uso de las lenguas escolares en entornos no escolares.

Aspectos regio- e estereoquímicos da adição de Michael assimétrica via iminas quirais com centros estereogênicos pré-existentes

The asymmetric Michael addition reactions using chiral imines, under neutral conditions (deracemizing alkylation process), constitute one of the main methods for the stereocontrolled elaboration of quaternary carbon centers. This protocol is based on the conjugate addition of secondary chiral enamines to electron-deficient alkenes. The focus of this report deals with the discussion of regio- and stereochemical aspects of the deracemizing alkylation process concerning enamines bearing a resident chiral center.

Caracterização de amostras comerciais de vermicomposto de esterco bovino e avaliação da influência do pH e do tempo na adsorção de Co(II), Zn(II) and Cu(II)

Some commercial samples of vermicompost from bovine manure (humus) were characterized by thermogravimetry with respect to humidity, organic matter and ash contents, the percentages of which range from 6.55 to 5.35%, 53.01 to 69.96% and 46.44 to 66,14%, respectively. The capacity of adsorption of Cu2+, Zn2+ and Co2+ ions by these samples has been evaluated as a function of pH and time. The contents of several metal ions in the original vermicompost samples have been determined by flame atomic absorption spectrometry after digestion in a microwave oven. The high nitrogen content suggests that the earthworms used in the maturation procedure lead to an efficient degradation of organic matter. The metal retention was affected by both pH and adsorption time. The results also show that adsorption follows the order Cu2+ > Zn2+ > Co2+.

El modelo de la Atención Centrada en la Persona: Análisis descriptivo de una muestra de personas mayores con demencia en centros residenciales

Este análisis descriptivo tiene el objetivo de evaluar la calidad asistencial de una muestra de personas con demencia institucionalizadas usando el Dementia Care Mapping (DCM) como metodología de observación sistemática y de examinar la presencia de pautas asociadas a la psicología social maligna en las residencias observadas. Participaron en el estudio 73 personas con demencia ingresadas en residencias a largo plazo. Los resultados más relevantes apuntan a la presencia de una cultura de cuidados donde predomina la psicología social maligna y el DCM como un instrumento que permite analizar el comportamiento de las personas con demencia, aportando nuevas variables como el bienestar emocional, la diversidad ocupacional y la calidad de la interacción social. Se concluye que la implementación de un modelo de atención centrado en la persona puede incidir postivamente en el bienestar de las personas con demencia.

Reciclagem química de zeólitas comerciais desativadas

Pyro and hydrometallurgical processes were applied to the treatment of spent commercial zeolites (a molecular sieve and a ZSM-5 sample). Both catalysts were employed in pilot plant units. They were kept in their original shape, they were not regenerated and were not subjected neither to mechanical stress nor to overheating zones during their time on-stream. Two recycling processes were tested: (i) direct solubilization of samples in mixtures of HF + H2O2 (60 ºC, 1 h). Although silicon was solubilized, insoluble matter was found in both samples, particularly in the molecular sieve, due to its high amounts of alkaline and alkaline-earth metals; (ii) fusion with KHSO4 (5 h, 600 ºC) with KHSO4/zeolite mass ratio 6:1. After fusion the solid was solubilized in water (100 ºC), leaving silicon as SiO2 residue. In both processes, solubilized metals were isolated by conventional selective precipitation techniques. Analysis of final products by common analytical methods shows that metals present in the original catalysts were recovered with very high yields except when the molecular sieve was treated with HF + H2O2. This reactant mixture proved to be suitable for processing zeolites with a low alkaline and alkaline-earth metal content whereas fusion with KHSO4 appeared to be adequate for all types of zeolites.

A evolução dos reagentes químicos comerciais através dos rótulos e frascos

This work presents an evolution profile of labels and containers of commercial chemicals employed in laboratories since 1870. Most chemicals were made in Germany before the Second World War, after which many other manufacturers arrived on the Brazilian market. North-american products were dominant in the 1940s, but Brazilian chemicals have increased their participation along time. Labels presented increasingly more information, from originally simple names of the compounds at the beginning of the XXth century to the data presented today such as chemical formulae, safety regards and detailed chemical analysis. The raw material for container manufacturing also changed: glass was dominant until the 1950s, but nowadays plastic flasks are preferred whenever possible. Cork covers were replaced by screw caps. The diversity of commercial products also sharply increased with time, especially after the 1950s, following the many new and specific applications of chemicals for research and commercial purposes.

Determinação de compostos bioativos em amostras comerciais de café torrado

Coffee is a product consumed all around the world, Brazil being the biggest exporter. However, little is known about the difference in composition of the different brands in terms of bioactive substances. In the present study, ten of the most consumed brands of coffee in Rio de Janeiro were analyzed. Caffeine contents, trigonelline and total chlorogenic acid varied from 0.8 g/100g to 1.4 g/100g; 0.2 g/100g to 0.5 g/100g and from 3.5 g kg-1 to 15.9 g kg-1, respectively. The large heterogeneity observed in the amounts of the bioactive compounds can be attributed to different formulations of the various brands, as well as to different roasting conditions.

Intervención de enfermería en Salud Mental desde los centros escolares

Con la promoción de la salud mental y la prevención de las enfermedades mentales se hace frente a factores determinantesrelacionados con la salud del individuo, familia, comunidad y la sociedad en general reforzando los factores de protección ydisminuyendo los factores de riesgo. Los centros escolares junto con los centros de trabajo son un escenario de actuacionesfundamentales, debido a la cantidad de tiempo que pasan en ellos las personas. Sabemos que la salud mental estádeterminada en gran parte por los primeros años de vida, de ahí la importancia de la promoción de la salud mental en lainfancia y en la adolescencia. En esta línea en la comunidad autónoma de Cataluña se ha diseñado y implementado unprograma “Salud y Escuela” que pretende: Mejorar la salud de los adolescentes a través de acciones de promoción de lasalud, prevención de las situaciones de riesgo y atención precoz de los problemas de salud relacionados con: • La saludafectivo-sexual • El consumo de drogas, alcohol y tabaco • Los trastornos relacionados con la alimentación • La salud mentalEn este programa el profesional de enfermería es el referente en el centro educativo de secundaria, y por tanto es el queinterviene orientando, informando, enseñando o derivando a los adolescentes a los servicios de salud, en función de lasconsultas que recibe. También asesora a los profesores y a las familias

Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear

Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.

Actuaciones educativas para la convivencia en centros con alumnado inmigrante

This article shows the results of fieldwork conducted in 11 schools within the project The improvement of living and learning in primary and secondary schools with immigrant students, funded under the National Plan I + D + i (2008-2012). In these schools different educational actions (non-segregation of students in specific groups, organization of host-group-meetings, Coexistence Gatherings or participation of family members) are being carried out, contributing to the improvement of coexistence not only among students but also among families and school professionals.

Enseñar a aprender a pensar en los centros educativos, incluso en las actividades de evaluación.= Teaching to learn how to think at schools, even within assessment activities

El auténtico protagonismo de los centros educativostiene que dirigirse a ayudar a pensar a sus alumnos y aenseñarlos a aprender, es decir, el docente tiene queenseñar estrategias de aprendizaje y debe promover elesfuerzo del estudiante para facilitar la construcción deesquemas y el aprendizaje permanente.El profesor debe utilizar cualquier situación deaprendizaje para enseñar dichas estrategias deaprendizaje, incluso en las situaciones de evaluación;por lo tanto, en este trabajo se sugiere que en lasevaluaciones de los alumnos y alumnas se tenga encuenta la metacognición como factor fundamental en elaprendizaje y la enseñanza

La formación en práctica reflexiva y los equipos directivos de los centros

La práctica reflexiva adquiere la condición de medio fundamental para la transformación de la práctica educativa. Si la formación del profesorado es únicamente transmisiva de conocimientos, el impacto sobre la práctica resulta escaso. Es en el momento en que el profesor reflexiona sobre su manera de hacer cuando se favorece la mejora de los aprendizajes del alumnado y, en consecuencia, la mejora de los resultados del centro. Los equipos directivos pueden hacerlo factible mediante la implementación de un marco organizativo adecuado

A relevante potencialidade dos centros básicos nitrogenados disponíveis em polímeros inorgânicos e biopolímeros na remoção catiônica

This review reports the application of inorganic and organic polymeric materials for cation removal by using nitrogenated basic centers. The data demonstrate the importance of the desired groups when free or immobilized on natural or synthesized inorganic polymers through silanol groups. Thus, the most studied silica gel is followed by natural crysotile and talc polymers, and the synthesized mesopore silicas, talc-like, silicic acids, phosphates and phyllosilicates. The organic natural biopolymeric chitin and cellulose were chemically modified to improve the availability of the amine groups or the reactivity with desirable molecules to enlarge the content of basic centers. The cation removal takes place at the solid/liquid interface and some interactive effects have their thermodynamic data determined.