Impact of microwave radiation on the structure of sinoatrial node in the rat heart
Bibliographic record
Abstract
Objective To observe the structural changes in the sinoatrial node of rat heart after microwave irradiation and its dose-effect relationship.Methods One hundred and twenty Wistar rats were exposed to microwave field at different average power densities: 0,5,10,50 mW/cm 2,for 6 min.The rats were killed on d1,d7,d14,d28,m3 and m6 after microwave irradiation.Sinoatrial nodes were taken to make paraffin sections for histological examination.The structural changes of the sinoatrial nodes and the content of collagen fibers were observed by light microscopy after HE and Masson staining and assessed by image analysis.Results(1) There were no significant changes in the sinoatrial nodes in the 5 mW/cm 2 group.Edema of P and T cells in the sinoatrial nodes in the 10 mW/cm 2 and 50 mW/cm 2 groups were observed on d1 after microwave irradiation and gradually worsened.Disorganization of sinoatrial node cells,cytoplasmic condensation and even karyopyknosis in some cells were observed on d14 in the those two groups.Gradual recovery occurred from d28 to m6 in the 10 mW/cm 2 and 50 mW/cm 2 groups.At 6 m after microwave irradiation,the injury did not return to normal level yet.(2) The content of collagen fibers in the sinoatrial nodes of the 50 mW/cm 2 group was significantly increased on m3(P 0.05) and m6(P 0.01) after microwave irradiation.The above described changes showed a dose-effect relationship.Conclusions Microwave irradiation at an average power density from 10 mW/cm 2 to 50 mW/cm 2 can cause structural injuries in the rat sinoatrial nodes with a dose-effect relationship.
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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 | 0.000 | 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".