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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 |
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