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  1. Evidence reports part 1 - Donor Breast Milk Banks - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK66135
    ... bovine milk based on the close correlation of absorbance at 280 nm with values for total N ... by: (1) the dependence of the relation between absorbance value and N content on both the mode ...
  2. Free Sialic Acid Storage Disorders - GeneReviews® - NCBI Bookshelf 
    https://www.ncbi.nlm.nih.gov/books/NBK1470
    ... lower the measurement and chromophores may contribute to absorbance, creating a false measurement. (2) In thin-layer ... Frigge M, Stacey SN, Th Magnusson O, Thorsteinsdottir U, Masson G, Kong A, Halldorsson BV, Helgason A, ...