The DOI matches its Crossref record.
A FLUOROMETRIC PROCEDURE FOR THE MEASUREMENT OF TRYPTAMINE IN TISSUES
Abstract
A fluorometric method sufficiently sensitive to determine 0.1 to 5 µg of tryptamine in body fluids and tissues is described. The method involves an extraction with benzene, cyclization with formaldehyde to produce tetrahydronorharman followed by a dehydrogenation to form the highly fluorescent product norharman. By omitting the extraction, the procedure can be applied to measure tryptophan in fingertip blood.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
CORRODI, H., & JONSSON, G. (1967) · Journal of Histochemistry & Cytochemistry · doi:10.1177/15.2.65 · Cited by 786
Grahame‐Smith, D. G. (1971) · Journal of Neurochemistry · doi:10.1111/j.1471-4159.1971.tb12034.x · Cited by 665
Enzymic Studies on the Biosynthesis of Serotonin in Mammalian Brain
Ichiyama, A., Nakamura, S., Nishizuka, Y., & Hayaishi, O. (1970) · Journal of Biological Chemistry · doi:10.1016/s0021-9258(19)77149-x · Cited by 311
Tryptamine: a neuromodulator or neurotransmitter in mammalian brain?
Jones, R. S. G. (1982) · Progress in Neurobiology · doi:10.1016/0301-0082(82)90023-5 · Cited by 198
Thomson, J., Rankin, H., Ashcroft, G. W., Yates, C. M., McQueen, J. K., & Cummings, S. W. (1982) · Psychological Medicine · doi:10.1017/s0033291700049047 · Cited by 177
Metadata
- Authors
- Hess, S. M., & Udenfriend, S.
- Venue
- The Journal of Pharmacology and Experimental Therapeutics
- Publisher
- Elsevier BV
- Published
- 1959-11
- Volume
- 127
- Issue
- 3
- Pages
- 175-177
- ISSN
- 0022-3565 (ISSN-L)
- OpenAlex
- W2254503714
- Cited by
- 235
- References
- 0
- FWCI
- 9.53
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: A FLUOROMETRIC PROCEDURE FOR THE MEASUREMENT OF TRYPTAMINE IN TISSUES. https://app.cochat.ai/papers/10.1016/s0022-3565(25)25679-8
- The paper
- Hess, S. M., & Udenfriend, S. (1959). A FLUOROMETRIC PROCEDURE FOR THE MEASUREMENT OF TRYPTAMINE IN TISSUES. The Journal of Pharmacology and Experimental Therapeutics. https://doi.org/10.1016/s0022-3565(25)25679-8
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.