Broadband Mm-Wave Spectroscopy on Biological Samples
During the initial phase of broadband mm-wave spectroscopic investigations on biological samples, one is faced with serious and very different problems: On the one side biological cells like E.c. or yeast usually live in an aqueous solution, so that the absorption of the cells is probably totally masked by the strong absorption of the aqueous solution itself. If one dries the cells, then the cells are often no longer living. (Of course there exist some special biological systems which can live without outer water; the brine shrimp Artemia salina for instance, or spores). On the other side, the absorption of biological macromolecules is very weak, so that quite sensitive methods are necessary. Often samples such as DNA, RNA or lysozyme are most conveniently obtained in a powder form which is more or less inhomogeneous. This complicates the situation again. I would like to introduce the methods we developed in Stuttgart, to solve or to circumvent these problems.
KeywordsSample Thickness Brine Shrimp Fuse Quartz Complex Index Detector Ratio
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