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This intriguing title was chosen not by me, but by the Chairman of the Scientific Organizing Committee with reference to Fred Whipple’s talk at the Heidelberg Conference on Halley in 1989. It may seem a bit strange in the middle of the dry Atacama region, but if we would have had a conference about small objects in the outer solar system at that time, 14 years ago, there would have been about as much...
Two new families of fluorescent probe, acridones and quinacridones, whose fluorescence lifetime can be altered to produce a range of lifetimes from 3 ns to 25 ns are described. Both families of fluorophore have fluorescence lifetimes which are unaffected by pH in the range of 5 to 9 and show a marked resistance to photobleaching. The probes have been modified to allow them to be attached to biomolecules...
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