瑞士电子和微生物技术中心的科学家们最近研制出一种小照相机,这种照相机能够拍摄出有生命的动植物组织中的分子。在此以前,给分子这类的小微粒照相所采取的唯一的方法是先将它们破坏,然后使用电子显微镜才能看到ＤＮＡ,而且必须在真空状态下才能操作电子束。科学家们也曾经发 Scientists at the Swiss Center for Electronics and Microbiology have recently developed a small camera that takes pictures of molecules in living animal and plant tissue. Until then, the only way to take pictures of small particles like molecules was to destroy them first and then use an electron microscope to see the DNA, and the electron beam must be manipulated under vacuum. Scientists have also sent