Effects of Peptides and Amines on Isolated Guinea Pig Tracheae as Influenced by Inhibitors of the Metabolism of Arachidonic Acid
Bibliographic record
Abstract
Stimulants (histamine, acetylcholine and substance P) and relaxants (isoprenaline and bradykinin) of the guinea pig trachea were tested in the absence and presence of mepacrine, eicosatetraynoic acid, BW 755C and indomethacin in order to evaluate the involvement of prostaglandins and congeners in the effects of amines and peptides. While histamine appeared to stimulate tracheal smooth muscle directly, acetylcholine acted in part by promoting the release of contractile leukotrienes. Substance P was unable to express its full stimulating effect because of a likely release of an inhibitory prostaglandin. Isoprenaline inhibited tracheal smooth muscles by a direct action, while the relaxation of the trachea in response to bradykinin appeared to depend on the release of prostaglandins, since it was reduced in the presence of inhibitors of cyclo- and lipooxygenase. It is concluded that enzymes involved in the metabolism of arachidonic acid are present in the guinea pig trachea and are activated both by relaxant and stimulant agents.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".