美国麻省坎布里奇应用生物技术实验室最近研制出一种生物传感器,它能对多种化合物进行快速检测。美国科学家在设计该传感器时,设法让受体能像在体内那样正常发挥作用。例如:他们将神经传递介质乙酰胆碱固定在传感器表面,并使之稳定化,当它与被测试样中的目标分子结合时,其相互作用可以引起电阻的改变。这种改变表明了某种化合物的存在。 The Applied Biotechnology Laboratory in Cambridge, Massachusetts, recently developed a biosensor for rapid detection of multiple compounds. As the American scientists designed the sensor, they tried to get the receptor to function as well as it does in the body. For example, they immobilize the neurotransmitter acetylcholine on the sensor surface and stabilize it. When it binds to a target molecule in a test sample, its interaction can cause a change in resistance. This change indicates the existence of a compound.