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Determination of Chromium Combined with DNA, RNA and Proteins in Chromium-Rich Brewer's Yeast by NAA

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Abstract

The content of chromium in the DNA, RNA and protein fractions separated from chromium-rich and normal brewer's yeast was determined by neutron activation analysis (NAA). Our results show that the extracted relative amounts and concentrations of DNA, RNA and proteins have no significant difference for two types of yeast, but the chromium content in DNA, RNA and proteins fractions extracted from the chromium-rich yeast are substantially higher than those from the normal. In addition, the concentration of chromium in DNA is much higher than that in RNA and proteins. It is evident that the inorganic chromium compounds can enter the yeast cell during the yeast cultivation in the chromium-containing culture medium and are converted into organic chromium species, which are combined with DNA, RNA and proteins.

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Authors and Affiliations

  1. Institute of High Energy Physics and Laboratory of Nuclear Analytical Techniques, Chinese Academy of Sciences, P. O. Box 2732, Beijing, 100080, P.R. China

    W. J. Ding, Q. F. Qian, X. L. Hou & W. Y. Feng

  2. Institute of High Energy Physics and Laboratory of Nuclear Analytical Techniques, Chinese Academy of Sciences, P.O. Box 2732, Beijing, 100080, P.R. China

    Z. F. Chai

Authors
  1. W. J. Ding
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  2. Q. F. Qian
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  3. X. L. Hou
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  4. W. Y. Feng
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  5. Z. F. Chai
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Ding, W.J., Qian, Q.F., Hou, X.L. et al. Determination of Chromium Combined with DNA, RNA and Proteins in Chromium-Rich Brewer's Yeast by NAA. Journal of Radioanalytical and Nuclear Chemistry 244, 259–262 (2000). https://doi.org/10.1023/A:1006725912386

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  • DOI: https://doi.org/10.1023/A:1006725912386

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