Spectral impact of inactivating light on photoreactivation of <i>Escherichia coli</i>
Bibliographic record
Abstract
The spectral impact of inactivating light on subsequent photoreactivation of Escherichia coli K12 was investigated. Ultraviolet-induced pyrimidine dimers in the genome of E. coli were determined, while the survival of E. coli was also examined. A medium-pressure UV lamp (MP: 220–580 nm) was equipped with an optical bandpass filter with the peak emission at 230 nm, 254 nm, or 300 nm, in order to characterize the photoreactivation properties. As references, a MP lamp without a filter, a MP lamp with a glass plate (MPG: 300–580 nm), and a low-pressure UV lamp (LP: 254 nm) were also used for inactivation. Medium pressure inactivation at 230 nm, 254 nm, or 300 nm was followed by the photoreactivation of survival ratio, which was comparable to that after LP exposure. Meanwhile, a repressed survival recovery was observed after MP or MPG inactivation. It was therefore indicated that the MP lamp was effective at repressing photoreactivation of E. coli, which was not attributable to the specific MP emission either at 230 nm, 254 nm, or 300 nm. Rather, the simultaneous exposure to broad wavelengths might provide the MP lamp with the repair repressive effect. Key words: endonuclease sensitive site (ESS), Escherichia coli, medium-pressure UV lamp, photoreactivation, spectral impact, ultraviolet (UV) disinfection.
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 distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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) | 0.000 | 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 teacher head, 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".