Poetic enough for what? It seems to me that "the contribution to the service of the science" and "how a dedicated chemist contributed to the service of the science" describe specific things, not general concepts of which one could cite an "example". "the science" means a specific science that you have previously mentioned.
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snuppelinaHer life journey is a vivid example of dedicated service to the science.Yes, this is OK. Just check again that you do really mean "the science".