Ciudadan??a y aprendizaje dial??gico en los programas universitarios para mayores : reflexiones y experiencias desde la pedagog??a cr??tica

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El trabajo en red como fuente de aprendizaje : posibilidades y l??mites para la creaci??n de conocimiento : una visi??n cr??tica

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Aportaciones de un estudio etnogr??fico sobre la participaci??n de las familias a la formaci??n cr??tica del profesorado en una escuela inclusiva

Monogr??fico con el t??tulo: "La participaci??n de las familias en la escuela"

Educar en el pensar : pensament cr??tic, creatiu i cur??s

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Ver ??? observar ??? entender : fomentar la competencia visual cr??tica

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An??lisis cr??tico del modelo de evaluaci??n LOMCE

Monogr??fico con el t??tulo: 'An??lisis cr??tico del modelo de evaluaci??n LOMCE'

Investigar para innovar : de ???local??? a ???inmigrante??? : una mirada cr??tica y constructiva del fen??meno migratorio a partir de la situaci??n laboral de los j??venes

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La participaci??n de los padres en la educaci??n : un an??lisis cr??tico

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La influencia de la ense??anza virtual sobre el pensamiento cr??tico de los profesores en formaci??n

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La evaluaci??n de la producci??n cient??fica : breve an??lisis cr??tico

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MOOCS : una visi??n cr??tica desde las ciencias de la educaci??n

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El aprendizaje y Servicio en la formaci??n inicial del profesorado : de las pr??cticas educativas cr??ticas a la institucionalizaci??n curricular

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The role of glutamate receptors in cholesteatoma induced bone resorption

This paper discusses a study examining a new model of cholesteatoma induced bone resorption in mice using autologous implantation of pinna dermis to the surface of the skull and the role of glutamate receptors in reducing the number of osteoclasts.

DISTRIBUTION OF Cr, Pb, Cu, Cd AND Zn IN SEDIMENTS OF THE DOBCZYCE DAM RESERVOIR (SOUTHERN POLAND)

Sediments play a fundamental role in the behaviour of contaminants in aquatic systems. Various processes in sediments, eg adsorption-desorption, oxidation-reduction, ion exchange or biological activities, can cause accumulation or release of metals and anions from the bottom of reservoirs, and have been recently studied in Polish waters [1-3]. Sediment samples from layer A: (1 divided by 6 cm depth in direct contact with bottom water); layer B: (7 divided by 12 cm depth moderate contact); and layer C: (12+ cm depth, in theory an inactive layer) were collected in September 2007 from six sites representing different types of hydrological conditions along the Dobczyce Reservoir (Fig. l). Water depths at the sampling points varied from 3.5 to 21 m. We have focused on studying the distribution and accumulation of several heavy metals (Cr, Pb, Cd, Cu and Zn) in the sediments. The surface, bottom and pore water (extracted from sediments by centrifugation) samples were also collected. Possible relationships between the heavy-metal distribution in sediments and the sediment characteristics (mineralogy, organic matter) as well as the Fe, Mn and Ca content of sediments, have been studied. The 02 concentrations in water samples were also measured. The heavy metals in sediments ranged from 19.0 to 226.3 mg/kg of dry mass (ppm). The results show considerable variations in heavy-metal concentrations between the 6 stations, but not in the individual layers (A, B, C). These variations are related to the mineralogy and chemical composition of the sediments and their pore waters.

Structure determination, magnetic and optical properties of a new chromium(II) thioantimonate, [Cr((NH2CH2CH2)(3)N)]Sb4S7

The chromium(II) antimony(III) sulphicle, [Cr((NH2CH2CH2)(3)N)]Sb4S7, was synthesised under solvothermal conditions from the reaction of Sb2S3. Cr and S dissolved in tris(2-aminoethyl)amine (tren) at 438 K. The products were characterised by single-crystal X-ray diffraction. elemental analysis, SQUID magnetometry and diffuse reflectance spectroscopy. The compound crystallises in the monoclinic space group P2(1)/n with a = 7.9756(7), b = 10.5191(9), c = 25.880(2) angstrom and beta = 90.864(5)degrees. Alternating SbS33- trigonal pyramids and Sb36 semi-cubes generate Sb4S72- chains which are directly bonded to Cr(tren pendant units. The effective magnetic moment of 4.94(6)mu(B) shows a negligible orbital contribution, in agreement with expectations for Cr(II):d(4) in a (5)A ground state. The measured band gap of 2.14(3) eV is consistent with a correlation between optical band gap and framework density that is established from analysis of a wide range of antimony sulphides. (C) 2007 Elsevier Ltd. All rights reserved.