Last week, speakers at a program in Washington discussed using nanotechnology (纳米技术) to improve health care in developing countries.
Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to (36) cases of malaria. He says it could offer a better way than the traditional process of looking at a person’s blood under a (37) . In poor countries, this process is often not (38) . As a result, sick people may get treated for malaria even if they do not have it. Such misuse of medicines can lead to drug (39) . Quantum dots are particles that give off light when (40) . Researchers are studying ways to program them to (41) diseases by lighting up in the presence of a targeted molecule.
Experts say nanotechnology shows promise not just for (42) diseases, but also for treating them. Piotr Grodzinski of the National Institutes of Health talked about how nanotechnology could make drugs more (43) . He talked about cancer drugs already developed with nanotechnology. (44) .
Andrew Maynard is the chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. (45) . But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles. (46) .
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He noted that Brazil, India, China and South Africa are cu......