What question did this study set out to answer?

To establish and refine a quantitative colorimetric method for measuring urinary substances with active methylene groups as a reliable index of androgenic hormone activity.

August 1, 1938Biochemical JournalOpen Access

Colorimetric determination of substances containing the grouping —CH2.CO— in urine extracts as an indication of androgen content

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Authors

NCNancy Helen CallowNational Institute for Medical Research RCRobert Kenneth CallowGoogle (United States)CEC. W. EMMENSLeiden University

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Implication

Laboratory study demonstrates colorimetric measurement of active methylene compounds in urine extracts, indicating chemical assays effectively reflect androgenic activity.

Key Points

To establish and refine a quantitative colorimetric method for measuring urinary substances with active methylene groups as a reliable index of androgenic hormone activity.
Extracted androgenic steroid constituents from human urine samples.
Applied a modified Zimmermann colorimetric assay utilizing m-dinitrobenzene under alkaline conditions to target active methylene groups.
Compared chemical colorimetric values directly against capon comb-growth biological assays using pure reference hormones such as androsterone.
Developed an optimized colorimetric protocol with improved analytical sensitivity and specificity for human urine extracts.
Demonstrated that chemical measurement of active methylene structures correlates with biological androgenic potency, providing a tangible guide for investigating steroid hormone metabolism.

Cite This Study

Callow et al. (1938) studied this question.

synapsesocial.com/papers/6a1dca95c169426e5434cb82 https://doi.org/10.1042/bj0321312

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Implication

Laboratory study demonstrates colorimetric measurement of active methylene compounds in urine extracts, indicating chemical assays effectively reflect androgenic activity.

Colorimetric determination of substances containing the grouping —CH2.CO— in urine extracts as an indication of androgen content

Discussion

Member takes

Implication

Key Points

Cite This Study

Colorimetric determination of substances containing the grouping —CH2.CO— in urine extracts as an indication of androgen content

Discussion

Member takes

Implication

Key Points

Cite This Study

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