Flash ciencias, II.

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Flash ciencias, III.

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Flash ciencias, IV.

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Flash ciencias, V.

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Flash ciencias, VII.

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Flash ciencias, VIII.

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Flash de Clowns.

http://www.clown.org, a través de esta web se pueden conocer las actividades de la ONG de las artes Payasos Sin Fronteras y encontrar informaciones de interés. Incluye un reportaje nuevo cada mes y aportaciones de los visitantes en forma de correo electrónico.

Flash 5 : curso básico Macromedia Flash 5.

Curso multimedia que enseña el uso básico de la herramienta 'Macromedia Flash 5'. Se incluyen ejemplos y ejercicios.

GCSE Physical Education : flash revise cards : the smarter way to revise.

Caja con cien tarjetas de conceptos clave y más de trescientas preguntas y respuestas. Cada tarjeta se centra en un tema o concepto, con hasta cuatro preguntas breves en un lado y las respuestas en el reverso, junto con una nota del examinador.

Diseño de un tema de Lengua y Literatura Inglesas a través de Flash y Dreamweaver de Macromedia.

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L'alumnat "flash" pot ofegar-se en els textos

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Direct detection of dimethylstannylene and tetramethyldistannene in solution and the gas phase by laser flash photolysis of 1,1-dimethylstannacyclopent-3-enes

The photochemistry of 1,1-dimethyl- and 1,1,3,4-tetramethylstannacyclopent-3-ene (4a and 4b,respectively) has been studied in the gas phase and in hexane solution by steady-state and 193-nm laser flash photolysis methods. Photolysis of the two compounds results in the formation of 1,3-butadiene (from 4a) and 2,3-dimethyl-1,3-butadiene (from 4b) as the major products, suggesting that cycloreversion to yield dimethylstannylene (SnMe2) is the main photodecomposition pathway of these molecules. Indeed, the stannylene has been trapped as the Sn-H insertion product upon photolysis of 4a in hexane containing trimethylstannane. Flash photolysis of 4a in the gas phase affords a transient absorbing in the 450-520nm range that is assigned to SnMe2 by comparison of its spectrum and reactivity to those previously reported from other precursors. Flash photolysis of 4b in hexane solution affords results consistent with the initial formation of SnMe2 (lambda(max) approximate to 500 nm), which decays over similar to 10 mu s to form tetramethyldistannene (5b; lambda(max) approximate to 470 nm). The distannene decays over the next ca. 50 mu s to form at least two other longer-lived species, which are assigned to higher SnMe2 oligomers. Time-dependent DFT calculations support the spectral assignments for SnMe2 and Sn2Me4, and calculations examining the variation in bond dissociation energy with substituent (H, Me, and Ph) in disilenes, digermenes, and distannenes rule out the possibility that dimerization of SnMe2 proceeds reversibly. Addition of methanol leads to reversible reaction with SnMe2 to form a transient absorbing at lambda(max) approximate to 360 nm, which is assigned to the Lewis acid-base complex between SnMe2 and the alcohol.