Vogel and team then tracked the fate of the gold nanoparticles with scanning electron microscopy. They found that the shuttles did indeed pick up the nanoparticles and that they held on to them, with a loss rate of about 28% over 12 minutes. They also found that DNA stations are more effective than polymer ones.
'Future challenges will be to combine the main components of a transport system: pick-up of cargo from defined locations, guided transport, and controlled discharge of the load at the final destination,' commented Vogel. She went on to caution: 'The problems are always in the details of working through the engineering challenges of interfacing biological molecules with synthetic devices.'
Scientists are a step closer to the precise control of chirality at the molecular level thanks to a quantum chemical study.
Dominik Kröner and Bastian Klaumünzer at Potsdam University, Germany, have shown that a pre-oriented achiral molecule, possessing no chirality at all, can be selectively switched into both its left- and right-handed chiral forms using a finely-tuned sequence of laser pulses.
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原帖由 口口番 于 2007-8-23 16:45 发表 http://dolc.de/forum/images/common/back.gif
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