Atrial Natriuretic Factor Release in Cardiomyopathic Hamsters
Bibliographic record
Abstract
Studies were done in male cardiomyopathic and normal hamsters to examine the effect of heart failure on atrial natriuretic factor (ANF) secretion. Five groups of animals were studied. The hamsters were 70, 150, 200, 250 and 300 days old. The degree of heart failure became more severe with age. This was associated with a marked increase in left and right atrial weight. Plasma ANF rose in the cardiomyopathic hamsters with age, and no significant change was seen in the normal animals. ANF levels in the atrial tissue declined as the animals developed heart failure, suggesting that ANF release increased in heart failure. To examine these directly, the right and left atria of these animals were isolated and superfused in a modified Langendorff apparatus. The effluents from these experiments were collected and analyzed for ANF levels. Analysis showed that ANF secretion (expressed as pg/min/mg of tissue) declined in heart failure. Since there were significant atrial hypertrophy, the results were also expressed as picogram per minute per atrium. When the data were shown as picogram per minute per atrium, there was a marked increase in ANF secretion. The present data show that one of the factors causing an increase in circulating ANF in heart failure is augmented secretion.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".