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 Building
Better Bones
The next generation of artificial hips and shoulders will incorporate
the latest in nanotechnology with implants that repair themselves, adapt
to changing conditions, and mesh with surrounding tissue -- in other words,
behave
like real bones -- unlike today's metal implants, which trigger immune
reactions and need frequent replacement.
A Ribosomal
Defense Mechanism
In some strains of common E. coli bacteria the ribosomes that
crank out proteins can't be disabled by antibiotics. Now scientists have
compared the differences
between ribosome structures in ordinary E. coli germs with
those resistant to streptomycin, shedding light on the mechanisms of protein
synthesis.
Tracking
the Wild Quasiparticle
Experimenters have added a clever twist to a familiar laser-optics technique
to follow the motions and lifetimes of the strange
entities called antinodal quasiparticles in two high-temperature superconductors.
These hard-to-measure phenomena turn out to be remarkably long-lived. |
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