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6 results
  1. NLM Digital Collections - 7/19/1985-9/13/1985 
    https://resource.nlm.nih.gov/101637321X26
    ... 50% ethanol containing 0.2M HC] and the absorbance of the solution was read at 500 nm. ... I/(AC-AY)I where A, is the absorbance for the interferon dilution, AY is the absorbance ...
  2. NLM Digital Collections - Affinity Chromatography 
    Publication: The Academic Press, 1971
    resource.nlm.nih.gov/101584571X153
    ... de- termining the amount of ligand (by radioactivity, absorbance, amino acid analysis, etc.) released from the substituted ... to Sepharose, since the washes contain essentially no absorbance at 280 mp and only 1-3% of ...
  3. NLM Digital Collections - Pertussis Vaccine Symposium (Volume 2) 
    Publication: [Bethesda, Md. : Department of Health, Education and Welfare, Public Health Service, National Institutes of Health, Division of Biologics Standards, 1963?]
    resource.nlm.nih.gov/101634847X2
    ... absorption curve and measured by the increase in absorbance at 2683 A. In vaccines which had appreciable ...