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Wednesday, September 02, 2009


A technique used to identify the color of feathers of ancient birds, will be used by a team of researchers of Yale, to figure out the color of dinosaurs. Derek Briggs, believes that ultraestructural study of fossilized melanosomas (organella that contains melanin, a pigment that absorb light), will be enough to determine the color of feathers, fur and fossilized skin of dinosaurs. While until recently was only possible to identify white and black color bands, today putting emphasis in the form of the structure will be possible, to determine the iridescence (color change, according to observation angle), or brightness of colours.

After examining fossil feathers of a dinosaur, coming from Messel Oil Shale/Darmstadt/Germany, Briggs said the feathers were black with an iridescent blue. In this case the fossilized melanosomes were aligned conforming rods. The distal portion of the feathers exhibited a continuous layer of closely packed melanosomas, similar to nanostructural conformations generating ultrathinned and brilliant iridescent colours, seen in the surfaces of black feathers of many current birds. To remember: intracellular melanosomes are highly mobiles in answer to hormonal or neural stimuli, causing visible changes in skin colors and others. It is expected that the analysis of colors of modern birds and butterflies, will discover melanosome conformation giving yellow, blue and orange colours, helping to understand the sexual behavior and camouflage of many dinosaurs.

Una técnica utilizada para identificar el color de plumas de aves antiguas, será utilizada por un equipo de cientificos de Yale para desentrañar el color de los dinosaurios. Derek Briggs, cree que el estudio ultraestructural de restos de melanosomas (organela que contiene melanina), un pigmento que absorben luz), será suficiente para determinar el color de plumas, pelo y piel fosilizada de dinosaurios. Mientras que hasta hace poco solo era posible identificar bandas de color blanco y negro, hoy poniendo énfasis en la forma de la estructura es possible, determinar la iridescencia (cambio de color, dependiente del angulo de observación), o brillantez del color.

Trás examinar plumas fósiles de un dinosaurio, procedente del sitio de Messel Oil Shale/Darmstadt/Germany, Briggs dijo que la plumas eran negras con un azul iridescente. En este caso los melanosomas fósiles estaban alineados conformando bastones. La porción distal de las plumas exhibía una capa continua de melanosomas estrechamente empaquetados, similar a conformaciones nanoestructurales ultradelgadas generadoras de colores brillantes iridescentes, vistas en la superficies de plumas negras de muchas aves actuales. Recordar que los melanosomas intracelulares son altamente mobiles en respuesta a estimulos hormonales o neurales, causando cambios visibles en los colores de piel y otros.
Se espera que el análisis de colores de aves y mariposas modernas, descubra la conformación de melanosomas dando colores amarillo, azul y naranja ayudando a comprender la conducta sexual y camuflaje de distintos dinosaurios.



Anonymous Anonymous said...

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6:38 PM  

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