998 resultados para Warren, John--1753-1815


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Poems by George Canning, J. H. Frere, George Ellis, William Gifford and others, which appeared in the Anti-Jacobin; or, Weekly examiner, Nov. 20, 1797-July 9, 1798.

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Mode of access: Internet.

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John Warren, Fred Wilson & Anita Diaz (2002). Competitive relationships in a fertile grassland community - does size matter? Oecologia, 132 (1) pp.125-130 Sponsorship: SEERAD / Leverhulme Trust RAE2008

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Warren, J. and James, P. (2006). The ecological effects of exotic disease resistance genes introgressed into British gooseberries. Oecologia 147(1),69-75. RAE2008

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John Warren and Chris Topping (2004). A trait specific model of competition in a spatially structured plant community. Ecological Modelling, 180 pp.477-485 RAE2008

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Ioan Fazey, John A. Fazey, Joern Fischer, Kate Sherren, John Warren, Reed F. Noss, Stephen R. Dovers (2007) Adaptive capacity and learning to learn as leverage for social?ecological resilience. Frontiers in Ecology and the Environment 5(7),375-380. RAE2008

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Metal organic frameworks (MOFs) are among the most exciting materials discovered recently, attracting particular attention for their gas-adsorption and -storage properties. Certain MOFs show considerable structural flexibility in response to various stimuli. Although there are several examples of 'breathing' MOFs, in which structural changes occur without any bond breaking, examples of transformations in which several bonds are broken and made are much rarer. In this paper we demonstrate how a flexible MOF, Cu-2(OH)(C8H3O7S)(H2O)center dot 2H(2)O, can be synthesized by careful choice of the organic linker ligand. The flexibility can be controlled by addition of a supplementary coordinating molecule, which increases the thermal stability of the solid sufficiently for direct imaging with electron microscopy to be possible. We also demonstrate that the MOF shows unprecedented low-pressure selectivity towards nitric oxide through a coordination-driven gating mechanism. The chemical control over these behaviours offers new possibilities for the synthesis of MOFs with unusual and potentially exploitable properties.

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Su contenido se adapta a las especificaciones AS y A2 de 2008 para OCR y AQA.Traza la evolución de la crisis de la mitad de los Tudor, desde Enrique VIII a María I, analiza la sucesión de Isabel y su consolidación en el poder, examina las amenazas internas y externas, de carácter político, religioso y militar, a su gobierno, así como los problemas de los últimos años de su reinado. Incluye fechas clave, términos y temas, perfiles biográficos, resúmenes esquemáticos, fuentes literarias y síntesis de los principales debates historiográficos.