999 resultados para Constituição de 1937


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English summary: Protection of private ownership and freedom of contract : changes in American legal thought (s.1015-1016)

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This document includes the history, photos and maps of Iowa's state parks including forest & scientific preserves and scenic & historic parks.

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[spa]En este artículo planteamos que significaron los trabajos de los arquitectos Ramon y Antoni Puig Gairalt, que abarcan desde la primera década del siglo XX hasta el año 1937 y que aún perviven en muchas de las localidades del territorio catalán donde intervinieron. Hablamos en plural de los Puig Gairalt porque fueron dos hermanos, Ramon y Antoni, aunque en L'Hospitalet de Llobregat las intervencions corresponden mayoritariamente a Ramon Puig Gairalt. En la actualidad muchas de las obras perduran y, como valores patrimoniales, han llegado hasta nosotros. Como es bien sabido, el patrimonio de muchas poblaciones y ciudades forma parte de la memoria con la que una colectividad se identifica. A lo largo del tiempo, han ido conformando su paisaje urbano y cualquier colectividad que transita por su territorio, establece un vínculo muy directo sea éste o no de carácter monumental porque de hecho se ha convertido en signo de su identidad.

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This paper focuses on the teaching development practice in the field of chemistry covering such disciplines as chemistry teaching practice, chemistry teaching instrumentation and chemistry teaching methodology and/or didactics, thereby describing and analysing the logics of the development practice and the role of teachers as well as the epistemological identity configurations (knowledges which are proper to said identity) within this discipline field.

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Superabsorbent hydrogels based on poly (acrylamide-co-acrylate) and different kaolins, were prepared by free-radical aqueous copolymerization. FTIR and WAXS techniques were employed for characterization of a series of hydrogels, obtained by varying the percentage of clay, crosslinking and constitution of kaolin. The water absorbency at equilibrium (Weq) decreased with increasing clay content and the amount of crosslinking agent. Superabsorbent hydrogel (Weq > 1084 g H2O/g gel) was obtained as 10 wt% of white kaolin and 0.05 mol% of crosslinking agent were used. The hydrogel proved sensitive to pH variation and the presence of salts.

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