Sci‐AM Fri ‐ 04: Radiation induced apoptosis and chromosomal aberrations in human lymphocytes: Estimating the risks associated with radiation exposures
Bibliographic record
Abstract
Research conducted at McMaster University has shown a relative biological effect (RBE) of unity, between 280keV neutrons and gamma radiation, for the induction of apoptosis in human lymphocytes. Similar results have also been seen by Vral et al. (1998) and Warenius and Down (1995) for the induction of apoptosis in human lymphocytes and mouse thymocytes respectively. It has previously been reported that neutrons of energies 36keV to 14.6Mev have an RBE ranging from 67.1±28.9 to 16±6.8 for induction of dicentrics in human lymphocytes respectively (Schmid et al., 2003, 2002, and 2000). This discrepancy between RBEs suggests that further work is needed to understand why human lymphocytes have such varying response to different radiations. Radiation‐induced apoptosis and chromosomal aberrations are being measured in parallel. In this study, it was found that 280keV neutron induce chromosome breaks with an RBE of 6.4 (for the induction of 1 break/cell). An experiment was established to study the types of chromosomal aberrations which exist in the lymphocytes which have not committed apoptosis 48 hours after radiation. Isolated lymphocytes were incubated for 48 hours in complete media before PHA stimulation. This allowed the analysis of the chromosomal damage present in cells that do not commit apoptosis immediately. It is possible that the cells which have not committed apoptosis at 48 hours are those which have been less severely damaged and may be viewed by the organism as being repairable.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.002 |
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".