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Article #4701what's in a cell ?
From: ebstokes
Date: Fri, 06 Sep 1991 21:35
Date: Fri, 06 Sep 1991 21:35
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1844 bytes
Greetings, I am a physicist working in the area of fiber optic fluorescence sensors for biochemical process monitoring. Through the literature, and through our work, it has become apparant to me that there are a number of common constituents of bacterial cells which fluoresce. In practice, however, it seems that culture fluorescence is typically dominated by NADH (excitation at ~360 nm, emission at ~440 nm) and tryptophan (excitation at ~280 nm, emission at ~340 nm). The surprising thing (to me anyway) about a typical culture fluorescence is that the _only_ striking feature one usually sees can be explained by NADH and/or tryptophan. I would seem that many other compounds would fluoresce. I am interested in learning more about the mass fraction of NADH, tryptophan, and other biological fluorophores (riboflavin, pyrydoxine, ???) in specific types of cells (alcligenes eutrophus, for example). Is this data compiled somewhere ? I would also be interested in swapping info with others in this field. The field seems to me to be as much phenomenology and art as quantitative science. Thanks Ed Stokes ebstokes@crd.ge.com
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 107c0a,f53018fd41f44de2,start X-Google-Attributes: gid107c0a,public X-Google-Thread: 1119a6,f53018fd41f44de2,start X-Google-Attributes: gid1119a6,public X-Google-ArrivalTime: 1991-09-07 05:09:43 PST Path: arc1-ca.pugleaf.net!gmdzi!unido!fauern!ira.uka.de!sol.ctr.columbia.edu!zaphod.mps.ohio-state.edu!rpi!crdgw1!maxwell.crd.ge.com!ebstokes From: ebstokes@maxwell.crd.ge.com Newsgroups: sci.bio,bionet.general Subject: what's in a cell ? Message-ID: <23138@crdgw1.crd.ge.com> Date: 6 Sep 91 21:35:18 GMT Sender: news@crdgw1.crd.ge.com Followup-To: sci.bio Organization: General Electric Corp. R&D, Schenectady, NY Lines: 22