Word: gray
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...widened the gap (by removing a quarter inch of spine) to ensure that no nerve tissue remained to produce false-positive results. Then they built their cellular bridges according to a precise blueprint that carefully distinguished between the two kinds of nerve tissue in the spinal cord--white and gray matter. White matter contains the parts of nerves that are surrounded by a substance called myelin, which acts like insulation around an electric wire. Gray matter contains the parts that have no insulating myelin. It's almost impossible to get regeneration in white matter. Growth in gray matter...
Using nerves from the rat's chest muscles for the bridge, Cheng carefully connected the insulated white matter on one side of the spinal cord to uninsulated gray matter on the other. That way, the nerves in the gray matter would grow toward the white and, he hoped, re-establish contact. The investigators used a natural adhesive called fibrin to anchor the bridge in place...
...security apparatus was focused. All the more ironic, perhaps, that this fixation grew out of an attack 24 years ago in Munich, when Palestinian terrorists shocked the world by kidnapping and killing more than a dozen members of the Israeli Olympic team right in the middle of the modern, gray concrete Olympic Village. A generation later, while the Olympics have been secured, the rest of America is wide open...
...loved that time, and reminding myself of it made me feel optimistic through 39 feet of gray slush four months a year. Recalling it made me stifle instinctive laughter when people who never had to wander in the winter would laud Harvard's beauty...
...church Drumcree, 25 miles southwest of Belfast, were dotted with people, tents and a large marquee. But the sight on the opposite slopes was anything but bucolic. Two rows of razor wire separated the church and the main road into town. Behind this first barrier was a second: a gray wall of armored Land Rovers, parked nose to tail. And behind the second cordon was a third: a phalanx of policemen from the Royal Ulster Constabulary...