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  • Nature Publishing Group  (1)
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    Electronic Resource
    More on tea scum (1994)
    [s.l.] : Nature Publishing Group
    Nature 367 (1994), S. 602-602 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR - Although we agree with Jones1 that the brown stain on tea (see ref. 2) is formed by the adsorption of tannin from tea on the surface of the film of calcium carbonate that settles on teapots, where does the solid film of CaCO3 come from? CaCO3 precipitates when hard water is boiled, due to the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/367602a0
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