Aprenda a relajar a los niños en la escuela y en casa : de 2 a 7 años.

Se presentan diversos ejercicios, todos ellos concebidos en forma de juego, presentados en forma de fichas y destinados a obtener una relajación activa o pasiva de los niños. Se especifican los beneficios que proporcionan, la manera de proceder, en qué entorno y en qué momento del día llevarlos a cabo. Son juegos fáciles de realizar en la escuela o en casa que no requieren materiales especiales para ejecutarlos, ni ninguna competencia particular.

Grumpy grammar : key stage 2 : age 7-8.

Un mago y sus amigos ayudan a los niños a aprender y a practicar los conocimientos de gramática inglesa requeridos en la etapa clave dos (Key Stage 2). Diseñadas para captar la imaginación del estudiante las actividades están divididas en secciones, cada una centrada en una competencia básica:frases, sustantivos, verbos, adjetivos, nombres propios, pronombres, singular y plural, antónimos, verbo ser. En la última página incluye un Certificado de Excelencia donde cada niño puede pegar una estrella dorada como recompensa por los logros alcanzados en cada actividad. Al final del libro están las soluciones a las actividades.

The magnetic phase diagram of Gd(2)Sn(2)O(7)

Measurements of the magnetic susceptibility of the frustrated pyrochlore magnet Gd(2)Sn(2)O(7) have been performed at temperatures below T = 5 K and in magnetic fields up to H = 12 T. The phase boundaries determined from these measurements are mapped out in an H-T phase diagram. In this gadolinium compound, where the crystal-field splitting is small and the exchange and dipolar energy are comparable, the Zeeman energy overcomes these competing energies, resulting in at least four magnetic phase transitions below 1 K. These data are compared against those for Gd(2)Ti(2)O(7) and will, we hope, stimulate further studies.

Preparation and characterization of Cd(2)Nb(2)O(7) thin films on Si substrates

Thin Cd(2)Nb(2)O(7) films were grown on single-crystal p-type SiO(2)/Si substrates by the metallo-organic decomposition (MOD) technique. The films were investigated by X-ray diffraction, X-ray energy-dispersive spectroscopy, and field emission scanning electron microscopy, and showed a single phase (cubic pyrochlore), a crack-free spherical grain structure, and nanoparticles with a mean size of about 68 nm. A Cauchy model was also used in order to obtain the thickness and index of refraction of the stack layers (transparent layer/SiO(2)/Si) by spectroscopic ellipsometry (SE). The dielectric constant (K) of the films was calculated to be about 25 from the capacitance-voltage (C-V) measurements. (c) 2008 Elsevier Ltd. All rights reserved.

Optical energy storage properties of Sr(2)MgSi(2)O(7):Eu(2+),R(3+) persistent luminescence materials

The details of the mechanism of persistent luminescence were probed by investigating the trap level structure of Sr(2)MgSi(2)O(7):Eu(2+),R(3+) materials (R: Y, La-Lu, excluding Pm and Eu) with thermoluminescence (TL) measurements and Density Functional Theory (DFT) calculations. The TL results indicated that the shallowest traps for each Sr(2)MgSi(2)O(7):Eu(2+),R(3+) material above room temperature were always ca. 0.7 eV corresponding to a strong TL maximum at ca. 90 A degrees C. This main trap energy was only slightly modified by the different co-dopants, which, in contrast, had a significant effect on the depths of the deeper traps. The combined results of the trap level energies obtained from the experimental data and DFT calculations suggest that the main trap responsible for the persistent luminescence of the Sr(2)MgSi(2)O(7):Eu(2+),R(3+) materials is created by charge compensation lattice defects, identified tentatively as oxygen vacancies, induced by the R(3+) co-dopants.

Theoretical study of the structure and stability of NbxOy, and NbxOy+ (x = 1-3; y = 2-5, 7, 8) clusters

Geometric, thermodynamic and electronic properties of cluster neutrals NbxOy and cations NbxOy+ (x = 1-3; y = 2-5, 7, 8) have been characterized theoretically. A DFT calculation using a hybrid combination of B3LYP with contracted Huzinaga basis sets. Numerical results of the relative stabilities, ionization potentials and band gaps of different clusters are in agreement with experiment. Analysis of dissociation channels supports the more stable building blocks as formed by NbO2, NbO2+ NbO3 and NbO3+ stoichiometries. The net atomic charges suggest that oxygen donor molecules can interact more favorably on central niobium atoms of cluster cations, while the interaction with oxygen acceptor molecules is more favorable on the terminal oxygen atoms of neutral clusters. A topological analysis of the electron localization function gradient field indicates that the clusters may be described as having a strong ionic interaction between Nb and O atoms. Published by Elsevier B.V. B.V.

Immunolocalization of aquaporins 1, 2 and 7 in rete testis, efferent ducts, epididymis and vas deferens of adult dog

The transepithelial movement of water into the male reproductive tract is an essential process for normal male fertility. Protein water channels, referred to as aquaporins (AQPs), are involved in increasing the osmotic permeability of membranes. This study has examined the expression of AQP1, AQP2, and AQP7 in epithelial cells in adult dog efferent ducts, epididymis, and vas deferens. Samples of dog male reproductive tract comprising fragments of the testis, initial segment, caput, corpus and cauda epididymidis, and vas deferens were investigated by immunohistochemistry and Western blotting procedures to show the localization and distribution of the AQPs. AQP1 was noted in rete testis, in efferent ducts, and in vessels in the intertubular space, suggesting that AQP1 participated in the absorption of the large amount of testicular fluid occurring characteristically in the efferent ducts. AQP2 expression was found in the rete testis, efferent ducts and epididymis, whereas AQP7 was expressed in the epithelium of the proximal regions of the epididymis and in the vas deferens. This is the first time that AQP2 and AQP7 have been observed in these regions of mammalian excurrent ducts, but their functional role in the dog male reproductive tract remains unknown. Investigations of AQP biology could be relevant for clinical studies of the male reproductive tract and to technologies for assisted procreation.

Prediction of a weakly bound excited state in the He-4(2)-Li-7 molecule

A scale-independent approach, valid for weakly bound three-body systems, is used to analyze the existence of excited Thomas-Efimov states in molecular systems with three atoms: a helium dimer together with isotopes of lithium (Li-6 and Li-7) and sodium (Na-23). With the present study and the available data, we can clearly predict that the He-4(2)-Li-7 system supports an excited state with binding energy close to 2.31 mK. (C) 2000 American Institute of Physics. [S0021-9606(00)30442-1].

APPLICATION OF WISDOMS PERTURBATIVE METHOD TO THE 5/2 AND 7/3 RESONANCES

Wisdom's perturbative method is applied to the 5:2 and 7:3 resonances. Some comparisons with Yoshikawa's model are performed: for values of eccentricity up to about 0.3-0.4, agreement exists and it is better for 5:2 resonance. A clear difference between the cases 5:2 and 7:3 is observed : the former one, like in the case 3:1, can show significant variations of eccentricity, even starting from very small values, close to zero, while the latter seems to undergo such variations, but with initial eccentricity not less than a value near 0.1.

Análise do imprinting e da expressão dos genes H19 e IGF2 em células de Sertoli humanas apos exposição in vitro ao 2,3,7,8-Tetraclorodibenzo-p-dioxina (TCDD)

Pós-graduação em Biologia Geral e Aplicada - IBB

Defining suitable reference genes for RT-qPCR analysis on human sertoli cells after 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Toxicologia reprodutiva de ratos adultos expostos ao 2,3,7,8-Tetraclorodibenzo-P-Dioxina (TCDD) in útero

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Papel do resveratrol sobra a modulação do receptor Aril-hidrocarboneto (AhR) e o desenvolvimento da próstata de ratos expostos ao 2, 3, 7, 8-tetraclorodibenzo-p-dioxina (TDCC) durante a gestação

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)