Carolyn M Lewis
United States Department of Agriculture
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Publication
Featured researches published by Carolyn M Lewis.
Analytical Biochemistry | 1982
Evelyn L McGown; Michael G. Rusnak; Carolyn M Lewis; Jerry Ann Tillotson
Abstract Reduced ascorbic acid (0.2 to 10.0 μg/ml) can be conveniently assayed in acid-deproteinized tissue extracts by a colorimetric procdure using ferrozine. The assay is based on the reduction of Fe(III) to Fe(II) by ascorbic acid, followed by chromogenic chelation of Fe(II) with ferrozine. Guinea pig tissues (liver, spleen, adrenal gland, kidney) and human plasma and serum samples were used to compare this ferrozine method with the dinitrophenylhydrazine assay which measures (total) ascorbic acid by a different chemical principle. Results of the two methods were similar. The advantages of the ferrozine assay for reduced ascorbic acid include its speed, ease, and sensitivity.
Journal of Nutrition | 1982
Carolyn M Lewis; Evelyn L McGown; Michael G. Rusnak; Howerde E Sauberlich
Archive | 1988
Lawrence Mullen; Earl W. Morgan; Carolyn M Lewis; Conrad R. Wheeler; Don W. Korte
Archive | 1979
Evelyn L McGown; Carolyn M Lewis; Paul P Waring
Archive | 1988
Earl W. Morgan; Larry D. Brown; Carolyn M Lewis; Robert R Dahlgren; Don W. Korte
Archive | 1990
Gerald F. Hiatt; Carolyn M Lewis; Conrad R. Wheeler; Don W. Korte
Archive | 1989
Carolyn M Lewis; Larry D. Brown; Don W. Korte; Conrad R. Wheeler
Archive | 1986
John R Ryabik; Carolyn M Lewis; Paul W Mellick; Don W. Korte
Archive | 1982
Lawrence Mullen; Martha A Hanes; Carolyn M Lewis
Archive | 1982
Carolyn M Lewis; Martha A Hanes; Paul P Waring; Paul W Mellick; Glen E Marrs
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