An??lisis de la convivencia escolar en las aulas multiculturales de Educaci??n Secundaria

Resumen basado en el de la publicaci??n

Autoconcepto, dificultades interpersonales, habilidades sociales y conductas asertivas en adolescentes

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An??lisis de la conceptualizaci??n del aprendizaje del alumnado de Grados en Educaci??n : una aplicaci??n de la metodolog??a Q

Resumen tomado de la publicaci??n

Principales caracter??sticas de las familias espa??olas seg??n el nivel de participaci??n en la educaci??n escolar

Resumen basado en e de la publicaci??n

Acciones y actitudes diferenciales de los tutores y su relaci??n con la participaci??n de las familias

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El huerto escolar : recurso educativo del geocentro

El trabajo obtuvo un premio de la Modalidad A de los Premios Tom??s Garc??a Verdejo a las buenas practicas educativas en la Comunidad Aut??noma de Extremadura para el curso 2011-2012

La biblioteca escolar del IES El Brocense : centro de recursos, innovaci??n y aprendizaje

El trabajo obtuvo un premio de la Modalidad B de los Premios Tom??s Garc??a Verdejo a las buenas pr??cticas educativas en la Comunidad Aut??noma de Extremadura para el curso 2011

El control difuso de la constitución en los países andinos con énfasis en el Tribunal Fiscal del Perú, a partir de 2005

El propósito de esta tesis es evidenciar la posibilidad del control difuso en la Administración Pública, principalmente en los Tribunales Administrativos y Órganos Colegiados que imparten justicia administrativa a nivel nacional. El control difuso de la Constitución siempre se entendió como la facultad del poder judicial, que a través de los jueces de las diferentes instancias, quienes al momento de resolver un caso concreto, si evidencian manifiestamente la inconstitucionalidad de la norma aplicable al caso, pueden inaplicarla sólo para ese caso, cuyos efectos son inter partes, es decir la norma inaplicable por el juez sigue vigente dentro del ordenamiento jurídico, habiendo sido considerada nula sólo para el caso concreto. Sin embargo, esta postura de que el control difuso es sólo potestad del poder judicial, se fue relativizando, al menos en el caso peruano, toda vez que mediante la sentencia recaída en el Exp. Nº 3741-2004-AA/TC, el Tribunal Constitucional, crea la figura jurídica del control difuso administrativo, en la que los Tribunales Administrativos y Órganos Colegiados que imparten justicia administrativa con carácter nacional, también están en la potestad y el deber de aplicar el control difuso para garantizar la plena vigencia de la Constitución y el respeto de los derechos fundamentales de los administrados, inaplicando normas manifiestamente inconstitucionales. En consecuencia, para mejor ilustrar al respecto, la tesis lo dividimos en tres capítulos: en el primer capítulo, abordamos el desarrollo del control constitucional con énfasis en el control difuso, evidenciando el Principio de Supremacía Constitucional, así como la creación y recepción del control difuso y concentrado de la Constitución por los diferentes países del mundo. En el segundo capítulo desarrollamos el control difuso en los países andinos, resaltando el control difuso en la Administración Tributaria; y, finalmente en el tercer capítulo, desarrollamos el control difuso como atribución del Tribunal Fiscal del Perú, que se caracteriza por ser un Tribunal Administrativo que imparte justicia administrativa a nivel nacional, resolviendo conflictos en materia tributaria y aduanera.

Oxygen precipitation in Czochralski grown silicon heat treated at 525 degrees C

The diffusion of interstitial oxygen In silicon at 525 degrees C is studied using time-of-flight small-angle neutron scattering (SANS) to separate the elastic scattering from oxygen-containing aggregates from the inelastic scattering from neutron-phonon interactions. The growth of oxygen-containing aggregates as a function of time gives a diffusion coefficient, D, calculated from Ham's theory, that is I factor of similar to 3.8 +/- 1.4 times higher than that expected by extrapolation of higher and lower temperature data (D = 0.13 exp(-2.53 eV kT(-1)) cm(2) s(-1)). This result confirms previous observations of enhanced diffusion at intermediate temperatures (400 degrees C-650 degrees C) although the magnitude of the enhancement we find is Much smaller than that reported by some others.

Atmospheric chemistry of C4F9OC2H5 (HFE-7200), C4F9OCH3 (HFE-7100), C3F7OCH3 (HFE-7000) and C3F7CH2OH: temperature dependence of the kinetics of their reactions with OH radicals, atmospheric lifetimes and global warming potentials

The atmospheric chemistry of several gases used in industrial applications, C4F9OC2H5 (HFE-7200), C4F9OCH3 (HFE-7100), C3F7OCH3 (HFE-7000) and C3F7CH2OH, has been studied. The discharge flow technique coupled with mass-spectrometric detection has been used to study the kinetics of their reactions with OH radicals as a function of temperature. The infrared spectra of the compounds have also been measured. The following Arrhenius expressions for the reactions were determined (in units of cm3 molecule-1 s-1): k(OH + HFE-7200) = (6.9+2.3-1.7) × 10-11 exp(-(2030 ± 190)/T); k(OH + HFE-7100) = (2.8+3.2-1.5) × 10-11 exp(-(2200 ± 490)/T); k(OH + HFE-7000) = (2.0+1.2-0.7) × 10-11 exp(-(2130 ± 290)/T); and k(OH + C3F7CH2OH) = (1.4+0.3-0.2) × 10-11 exp(-(1460 ± 120)/T). From the infrared spectra, radiative forcing efficiencies were determined and compared with earlier estimates in the literature. These were combined with the kinetic data to estimate 100-year time horizon global warming potentials relative to CO2 of 69, 337, 499 and 36 for HFE-7200, HFE-7100, HFE-7000 and CF3CF2CF2CH2OH, respectively.

Seeds of change: The value of using Rhinanthus minor in grassland restoration

Question: What is the value of using Rhinanthus minor in grassland restoration and can restrictions on its establishment be overcome? Location: England (United Kingdom). Methods: Two experiments were established to determine the efficacy of inoculating R. minor on a suite of four agriculturally improved grasslands and the efficacy of using R. minor in grassland restoration. In Experiment 1, the effect of herbicide gap creation on the establishment and persistence of R. minor in grasslands ranging in productivity was investigated with respect to sward management. In Exp. 2, R. minor was sown at 1000 seeds/m(2) in conjunction with a standard meadow mix over a randomized plot design into Lolium perenne grassland of moderate productivity. The treatment of scarification was investigated as a treatment to promote R. minor. Results: Gap size had a significant role in the establishment and performance of R. minor, especially the 30 cm diameter gaps (Exp. 1). However, R. minor failed to establish long-term persistent populations in all of the agriculturally improved grasslands. In Exp. 2, establishment of R. minor was increased by scarification and its presence was associated with a significant increase in Shannon diversity and the number of sown and unsown species. Values of grass above-ground biomass were significantly lower in plots sown with R. minor, but values of total above-ground biomass (including R. minor) and forb biomass (not including R. minor) were not affected. Conclusions: The value of introducing R. minor into species-poor grassland to increase diversity has been demonstrated, but successful establishment was dependent on grassland type. The scope for using R. minor in grassland restoration schemes is therefore conditional, although establishment can be enhanced through disturbance such as sward scarification.

S-nitrosylation of proteins at the leading edge of migrating trophoblasts by inducible nitric oxide synthase promotes trophoblast invasion

Nitric oxide regulates many important cellular processes including motility and invasion. Many of its effects are mediated through the modification of specific cysteine residues in target proteins, a process called S-nitrosylation. Here we show that S-nitrosylation of proteins occurs at the leading edge of migrating trophoblasts and can be attributed to the specific enrichment of inducible nitric oxide synthase (iNOS/NOS2) in this region. Localisation of iNOS to the leading edge is co-incidental with a site of extensive actin polymerisation and is only observed in actively migrating cells. In contrast endothelial nitric oxide synthase (eNOS/NOS3) shows distribution that is distinct and non-colocalised with iNOS, suggesting that the protein S-nitrosylation observed at the leading edge is caused only by iNOS and not eNOS. We have identified MMP-9 as a potential target for S-nitrosylation in these cells and demonstrate that it co-localises with iNOS at the leading edge of migrating cells. We further demonstrate that iNOS plays an important role in promoting trophoblast invasion, which is an essential process in the establishment of a successful pregnancy.

Dual-specificity phosphatases in the hypo-osmotic stress response of keratin-defective epithelial cell lines

Although mutations in intermediate filament proteins cause many human disorders, the detailed pathogenic mechanisms and the way these mutations affect cell metabolism are unclear. In this study, selected keratin mutations were analysed for their effect on the epidermal stress response. Expression profiles of two keratin-mutant cell lines from epidermolysis bullosa simplex patients (one severe and one mild) were compared to a control keratinocyte line before and after challenge with hypo-osmotic shock, a common physiological stress that transiently distorts cell shape. Fewer changes in gene expression were found in cells with the severely disruptive mutation (55 genes altered) than with the mild mutation (174 genes) or the wild type cells (261 genes) possibly due to stress response pre-activation in these cells. We identified 16 immediate-early genes contributing to a general cell response to hypo-osmotic shock, and 20 genes with an altered expression pattern in the mutant keratin lines only. A number of dual-specificity phosphatases (MKP-1, MKP-2, MKP-3, MKP-5 and hVH3) are differentially regulated in these cells, and their downstream targets p-ERK and p-p38 are significantly up-regulated in the mutant keratin lines. Our findings strengthen the case for the expression of mutant keratin proteins inducing physiological stress, and this intrinsic stress may affect the cell responses to secondary stresses in patients' skin.

Fas ligand-induced apoptosis is regulated by nitric oxide through the inhibition of fas receptor clustering and the nitrosylation of protein kinase Cepsilon

Apoptosis induced by the death-inducing ligand FasL (CD95L) is a major mechanism of cell death. Trophoblast cells express the Fas receptor yet survive in an environment that is rich in the ligand. We report that basal nitric oxide (NO) production is responsible for the resistance of trophoblasts to FasL-induced apoptosis. In this study we demonstrate that basal NO production resulted in the inhibition of receptor clustering following ligand binding. In addition NO also protected cells through the selective nitrosylation, and inhibition, of protein kinase Cepsilon (PKCepsilon) but not PKCalpha. In the absence of NO production PKCepsilon interacted with, and phosphorylated, the anti-apoptotic protein cFLIP. The interaction is predominantly with the short form of cFLIP and its phosphorylation reduces its recruitment to the death-inducing signaling complex (DISC) that is formed following binding of a death-inducing ligand to its receptor. Inhibition of cFLIP recruitment to the DISC leads to increased activation of caspase 8 and subsequently to apoptosis. Inhibition of PKCepsilon using siRNA significantly reversed the sensitivity to apoptosis induced by inhibition of NO synthesis suggesting that NO-mediated inhibition of PKCepsilon plays an important role in the regulation of Fas-induced apoptosis.